Applied Catalysis A: General最新文献

筛选
英文 中文
Direct catalytic synthesis of functionalized dienes from simple 1,3-dienes: A review on substitution of 1,3-butadiene, isoprene, and 2,3-dimethyl-1,3-butadiene with metal catalysts 简单的1,3-二烯直接催化合成功能化二烯:金属催化剂取代1,3-丁二烯、异戊二烯和2,3-二甲基-1,3-丁二烯的研究进展
IF 4.8 2区 化学
Applied Catalysis A: General Pub Date : 2025-09-15 DOI: 10.1016/j.apcata.2025.120572
Yukio Hamamoto, Yasushi Obora
{"title":"Direct catalytic synthesis of functionalized dienes from simple 1,3-dienes: A review on substitution of 1,3-butadiene, isoprene, and 2,3-dimethyl-1,3-butadiene with metal catalysts","authors":"Yukio Hamamoto,&nbsp;Yasushi Obora","doi":"10.1016/j.apcata.2025.120572","DOIUrl":"10.1016/j.apcata.2025.120572","url":null,"abstract":"<div><div>Conjugated diene structures are important as feedstocks for many organic reactions. Therefore, development of efficient syntheses of conjugated diene compounds is desirable. This review introduces selective functionalizing reactions to 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene with various metal catalysts, ligands, and types of reactions. To overcome difficulties of controlling reactions, Heck reactions with Pd or Ni catalysts and metathesis cross couplings with Grubbs catalysts are mainly used. Focused on ligands, phosphines, 1,5-cyclooctadiene, imidazoline derivatives are frequently used. As a plausible mechanism, formation of π-allyl complexes is concerned as an initial step, especially when palladium is used. Then, as an intermediate, η<sup>2</sup>-π-allyl metal are formed. At last, reductive elimination undergoes and the desired compounds are obtained. Reaction mechanisms are concerned by labelling experiment or isolation of intermediates in most examples. In addition, in most reactions, results of substrate scope that not only 1,3-butadiene, isoprene, 2,3-dimethyl-1,3-butadiene are used are depicted. Besides, several applications of functionalized dienes are introduced. As a result, synthesized dienes are converted into (hetero)cyclic compounds, polyenes, enyl ketones. Overall, diene is considered a useful starting material for addition reactions such as polymerization, telomerization, and annulation and functionalizing dienes is expected to facilitate the efficient synthesis of organic compounds with complex structures by upgrading simple 1,3-diene.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"708 ","pages":"Article 120572"},"PeriodicalIF":4.8,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A meta-analysis and experimental comparison of the deactivation behavior of Mo/H-ZSM-5 and related catalysts under methane dehydroaromatization conditions 甲烷脱氢芳构化条件下Mo/H-ZSM-5及相关催化剂失活行为的meta分析与实验比较
IF 4.8 2区 化学
Applied Catalysis A: General Pub Date : 2025-09-15 DOI: 10.1016/j.apcata.2025.120569
Jordy Ramos-Yataco , Xinrui Zhang , Geunho Han , Tobin J. Marks , Justin M. Notestein
{"title":"A meta-analysis and experimental comparison of the deactivation behavior of Mo/H-ZSM-5 and related catalysts under methane dehydroaromatization conditions","authors":"Jordy Ramos-Yataco ,&nbsp;Xinrui Zhang ,&nbsp;Geunho Han ,&nbsp;Tobin J. Marks ,&nbsp;Justin M. Notestein","doi":"10.1016/j.apcata.2025.120569","DOIUrl":"10.1016/j.apcata.2025.120569","url":null,"abstract":"<div><div>CH<sub>4</sub> exists in great abundance and is used primarily as an energy source. Methane dehydroaromatization (MDA) is a promising route for its direct transformation into liquid hydrocarbons and H<sub>2</sub>. Mo/H-ZSM-5 is the benchmark catalyst, but it deactivates rapidly by carbonaceous species formation. Here, we evaluated Mo/H-ZSM-5 formulations as a function of MoO<sub>x</sub> loading, SiO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub> ratio, and Mo loading method for their impact on one-pass catalyst deactivation and after cycles of isothermal oxidative regeneration. The profiles of the rate of methane transformation to hydrocarbons vs. contact time show similar values for all catalysts with Mo/Al&lt; 0.5. Similarly, the catalytic profiles of C<sub>6</sub>H<sub>6</sub> selectivity vs. conversion overlap for all the formulations tested, indicating a non-selective deactivation pathway intrinsic to these Mo/H-ZSM-5 and giving the same active sites regardless of preparation method. Similar trends are observed after multiple rounds of isothermal oxidative regeneration. We then reanalyzed results from three decades of MDA studies. C<sub>6</sub>H<sub>6</sub> selectivity vs. conversion profiles are very similar across most studies with Mo/H-ZSM-5 and related supports. While the rate at which catalysts might traverse the induction, activation, and deactivation phases may be highly dependent on materials properties, only a few pre-treatment or reaction conditions gave fundamentally different behavior. Finally, we broaden the scope to review and experimentally test other transition metals on ZSM-5, highlighting the anomalously-high C<sub>6</sub>H<sub>6</sub> selectivities at low CH<sub>4</sub> conversion for Zn and Mn under catalytic conditions similar to those of the benchmark Mo/H-ZSM-5 catalyst. This meta-review combined with experimental validation helps identify leads for further investigation with respect to reaction conditions and/or catalyst formulation.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"708 ","pages":"Article 120569"},"PeriodicalIF":4.8,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental and microkinetic investigation of thermo-catalytic ammonia decomposition over a Ba-promoted Ru/Ni-BCZY catalyst for use in ammonia-fed protonic ceramic cells ba促进Ru/Ni-BCZY催化剂在供氨质子陶瓷电池上热催化氨分解的实验和微动力学研究
IF 4.8 2区 化学
Applied Catalysis A: General Pub Date : 2025-09-15 DOI: 10.1016/j.apcata.2025.120571
Sadaf Davari , Rinu Chacko , Tim Bastek , Patrick Lott , Julian Dailly , Sofia Angeli , Olaf Deutschmann
{"title":"Experimental and microkinetic investigation of thermo-catalytic ammonia decomposition over a Ba-promoted Ru/Ni-BCZY catalyst for use in ammonia-fed protonic ceramic cells","authors":"Sadaf Davari ,&nbsp;Rinu Chacko ,&nbsp;Tim Bastek ,&nbsp;Patrick Lott ,&nbsp;Julian Dailly ,&nbsp;Sofia Angeli ,&nbsp;Olaf Deutschmann","doi":"10.1016/j.apcata.2025.120571","DOIUrl":"10.1016/j.apcata.2025.120571","url":null,"abstract":"<div><div>Direct ammonia-fed Protonic Ceramic Cells (NH<sub>3</sub>-PCC) hold great promise for efficient energy generation, since ammonia can be used directly as fuel at the anode without the need of prior cracking to hydrogen. This study evaluates the catalytic activity of barium-promoted ruthenium catalysts supported on Ni-BCZY cermet particles in a packed-bed reactor, and provides a microkinetic model for simulation of the thermo-catalytic ammonia decomposition reaction. Among the catalysts tested, the 0.5 wt% Ru and 1 wt% Ba supported on a Ni-BCZY cermet exhibited the best performance, requiring less active material. The addition of Ru and Ba improved the catalytic activity of the bare Ni-BCZY cermet, which also shows catalytic activity due to Ni active sites. A new set of microkinetic model parameters is presented, combining Ba-promoted ruthenium and nickel surface steps. This model was used to conduct a parametric simulation, providing insights into the impact of the operating conditions.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"708 ","pages":"Article 120571"},"PeriodicalIF":4.8,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tuning A-site chemistry in AZrO3 perovskites for integrated CO2 capture and methanation 调整AZrO3钙钛矿的a位化学以实现二氧化碳捕获和甲烷化
IF 4.8 2区 化学
Applied Catalysis A: General Pub Date : 2025-09-14 DOI: 10.1016/j.apcata.2025.120570
Andrea Braga, Andrea Felli, Andrea Strazzolini, Maila Danielis, Sara Colussi, Alessandro Trovarelli
{"title":"Tuning A-site chemistry in AZrO3 perovskites for integrated CO2 capture and methanation","authors":"Andrea Braga,&nbsp;Andrea Felli,&nbsp;Andrea Strazzolini,&nbsp;Maila Danielis,&nbsp;Sara Colussi,&nbsp;Alessandro Trovarelli","doi":"10.1016/j.apcata.2025.120570","DOIUrl":"10.1016/j.apcata.2025.120570","url":null,"abstract":"<div><div>The Integrated Carbon Capture and Utilization (ICCU) strategy is gaining growing interest as a way to mitigate CO<sub>2</sub> emissions and transforming them into useful chemicals in a single reactor. The ICCU approach relies on Dual-Function Materials (DFMs), which combine sorption and catalytic conversion functionalities in one single unit. Here, we systematically explore the role of different alkaline and alkaline-earth cations in determining the microstructural, chemical and catalytic properties of Ru-loaded zirconate perovskites, with alkali elements in the A site, AZrO<sub>3</sub>, highlighting their impact on performance indicators such as CO<sub>2</sub> capture capacity, methanation rate and cyclic stability. The study provides evidence of zirconates-based DFMs being stable and efficient, particularly for Ru/SrZrO<sub>3</sub> (CO<sub>2</sub> capture: 170 μmol g<sup>−1</sup>, CH<sub>4</sub> production: 111 μmol g<sup>−1</sup>). Considering that such DFMs are characterized by surface area values one order of magnitude lower than conventional Al<sub>2</sub>O<sub>3</sub>-based materials, the Ru/AZrO<sub>3</sub> DFMs possess enhanced surface-specific activity compared to state-of-the-art DFMs, underscoring the importance of future microstructural optimization and providing guidance for the rational design of such materials.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"708 ","pages":"Article 120570"},"PeriodicalIF":4.8,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimization of platinum group metal–nickel composites as thermally stable low-temperature light-off three-way catalysts 铂族金属-镍复合材料作为热稳定的低温点燃三元催化剂的优化
IF 4.8 2区 化学
Applied Catalysis A: General Pub Date : 2025-09-13 DOI: 10.1016/j.apcata.2025.120563
Zannatul Mumtarin Moushumy , Ai Kuraoka , Sota Sakamoto , Yasuhito Wasada , Masayuki Tsushida , Keisuke Awaya , Junya Ohyama , Masato Machida
{"title":"Optimization of platinum group metal–nickel composites as thermally stable low-temperature light-off three-way catalysts","authors":"Zannatul Mumtarin Moushumy ,&nbsp;Ai Kuraoka ,&nbsp;Sota Sakamoto ,&nbsp;Yasuhito Wasada ,&nbsp;Masayuki Tsushida ,&nbsp;Keisuke Awaya ,&nbsp;Junya Ohyama ,&nbsp;Masato Machida","doi":"10.1016/j.apcata.2025.120563","DOIUrl":"10.1016/j.apcata.2025.120563","url":null,"abstract":"<div><div>Reducing the reliance on Pt group metals (PGMs) while enhancing the efficiency of three-way catalysts (TWCs) is a critical goal for emission control in modern hybrid engines. In this study, composite catalysts of Ni supported on ceria (Ni/CeO<sub>2</sub>) and Pt–Pd supported on ceria–zirconia mixed oxide (PtPd/CZ) were systematically investigated to maximize their synergy and minimize unfavorable interactions. After thermal aging at 800 °C under constant fuel-lean condition (L aging), a composite of PtPd/CZ and Ni/CeO<sub>2</sub> in a 1:1 wt ratio exhibited superior low-temperature light-off TWC performance to that of PtPd/CZ alone, despite containing 50 % less PGMs. The preparations of composite catalysts in powder and honeycomb forms suggested that the synergistic effect of the components may be attributed to a high metal dispersion and synergistic interactions due to the optimal proximity between PtPd/CZ and Ni/CeO<sub>2</sub> during L aging. By contrast, the intimate contact between PGMs and the CeO<sub>2</sub> surface overstabilized the PGM oxides, decreasing the activity. The positive interactions of the present composite catalyst were less obvious after thermal aging under stoichiometric–lean–rich fluctuating cycles because of PGM sintering. Overall, this study represents a significant advancement in PGM–Ni composite catalysts, paving the way toward more efficient and cost-effective TWC systems for next-generation hybrid engines.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"708 ","pages":"Article 120563"},"PeriodicalIF":4.8,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Self-supporting electrocatalysts derived from metal organic frameworks for water splitting: Current progress and perspectives 由金属有机骨架衍生的自支撑电催化剂用于水分解:最新进展与展望
IF 4.8 2区 化学
Applied Catalysis A: General Pub Date : 2025-09-13 DOI: 10.1016/j.apcata.2025.120564
Yanqiang Li , Xiaoyu Song , Kefei Wang , Jingli Gong , Yuping Tong , Siru Chen
{"title":"Self-supporting electrocatalysts derived from metal organic frameworks for water splitting: Current progress and perspectives","authors":"Yanqiang Li ,&nbsp;Xiaoyu Song ,&nbsp;Kefei Wang ,&nbsp;Jingli Gong ,&nbsp;Yuping Tong ,&nbsp;Siru Chen","doi":"10.1016/j.apcata.2025.120564","DOIUrl":"10.1016/j.apcata.2025.120564","url":null,"abstract":"<div><div>The urgent need for sustainable hydrogen production has driven significant research into efficient electrocatalysts for water splitting. Self-supporting electrocatalysts, characterized by binder-free architectures directly integrated onto conductive substrates, offer compelling advantages over conventional powdered counterparts, including enhanced electrical conductivity, superior mass transport, mechanical stability, and efficient gas bubble release. Metal-organic frameworks (MOFs) have emerged as good precursors for engineering such catalysts, enabling precise control over composition, morphology, and active site configuration. In this review, recent advancements in MOF-derived self-supporting electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) are summarized. We systematically analyze the design principles, synthesis strategies, and electrocatalytic performance of diverse material categories derived from MOF, including metal oxides/hydroxides, phosphides, sulfides, and selenides. For each category, we discuss how unique structural features such as multiple metal active centers, optimal H* adsorption, d-electron configurations govern catalytic activity and stability. Especially, key performance-enhancement strategies, such as heteroatom doping and heterostructure engineering are analyzed. Finally, some challenges and prospects are proposed for better designing MOF-derived self-supporting electrocatalysts to understand the structure-performance relationship and promote their practical application.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"708 ","pages":"Article 120564"},"PeriodicalIF":4.8,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stepwise impregnation of bimetallic catalysts for carbon nanotube synthesis 碳纳米管合成中双金属催化剂的逐步浸渍
IF 4.8 2区 化学
Applied Catalysis A: General Pub Date : 2025-09-12 DOI: 10.1016/j.apcata.2025.120568
Eunsu Yang , Jinwon Choi , Gihan Kwon , Taejin Kim , Jaegeun Lee
{"title":"Stepwise impregnation of bimetallic catalysts for carbon nanotube synthesis","authors":"Eunsu Yang ,&nbsp;Jinwon Choi ,&nbsp;Gihan Kwon ,&nbsp;Taejin Kim ,&nbsp;Jaegeun Lee","doi":"10.1016/j.apcata.2025.120568","DOIUrl":"10.1016/j.apcata.2025.120568","url":null,"abstract":"<div><div>Supported bimetallic catalysts are widely used for carbon nanotube (CNT) synthesis, yet the effects of impregnation procedure remain underexplored. Here, we investigated how the sequence of metal impregnation affects CNT synthesis. We prepared cobalt-molybdenum (Co-Mo) bimetallic catalysts on alumina supports via co- and stepwise impregnation, then compared their CNT synthesis performance under identical conditions. Stepwise-impregnated catalysts exhibited higher carbon yields than those prepared by co-impregnation. Notably, impregnating Mo after Co achieved the highest yield despite the lowest BET surface area. Synchrotron X-ray diffraction and visible/UV-Raman spectroscopy revealed that only this catalyst contained Al<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> with a MoO<sub>4</sub> structure. X-ray photoelectron spectroscopy clarified the surface chemistry: the catalyst with the highest CNT productivity exposed Mo entirely as Mo<sup>6 +</sup> in Al<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> and CoMoO<sub>4</sub>, whereas the others contained both Mo<sup>4+</sup> and Mo<sup>6+</sup>. The MoO<sub>x</sub> species like Al<sub>2</sub>(MoO<sub>4</sub>)<sub>3</sub> is known to suppress Co sintering during CNT synthesis, delaying catalyst deactivation and enhancing the carbon yield. Moreover, an inverse relationship was observed between carbon yield and the CoMoO<sub>4</sub> content. This is attributed to the consumption of catalytically active Co during CoMoO<sub>4</sub> formation, which reduces active sites for CNT growth. ICP-OES further confirmed higher Co and Mo loadings for stepwise catalysts, contributing to superior catalyst performance. The extent of CoMoO<sub>4</sub> formation strongly depended on the metal introduction sequence. This trend is illustrated by considering the relationship between the point of zero charge of support and the pH of the metal precursor solutions.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"708 ","pages":"Article 120568"},"PeriodicalIF":4.8,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Catalytic NH3/H2 co-combustion: A strategy for efficient and clean NH3 combustion 催化NH3/H2共燃:高效清洁NH3燃烧策略
IF 4.8 2区 化学
Applied Catalysis A: General Pub Date : 2025-09-12 DOI: 10.1016/j.apcata.2025.120567
Jimin Yun , JeongHyun Cho , Minjae Kim , Beom-Sik Kim , Hai Woong Park , Ji Chul Jung
{"title":"Catalytic NH3/H2 co-combustion: A strategy for efficient and clean NH3 combustion","authors":"Jimin Yun ,&nbsp;JeongHyun Cho ,&nbsp;Minjae Kim ,&nbsp;Beom-Sik Kim ,&nbsp;Hai Woong Park ,&nbsp;Ji Chul Jung","doi":"10.1016/j.apcata.2025.120567","DOIUrl":"10.1016/j.apcata.2025.120567","url":null,"abstract":"<div><div>Ammonia (NH<sub>3</sub>) is a promising carbon-free fuel; however, its substantial nitrogen oxide emissions and low reactivity hinder its practical applications. These limitations can be addressed by enhancing NH<sub>3</sub> reactivity and nitrogen (N<sub>2</sub>) selectivity via the addition of hydrogen (H<sub>2</sub>) and use of catalysts. This study presents an investigation on the catalytic co-combustion of NH<sub>3</sub> and H<sub>2</sub> (NH<sub>3</sub>/H<sub>2</sub> co-combustion) as a novel strategy for achieving an efficient and clean NH<sub>3</sub> combustion, providing valuable insights into the key design parameters for developing high-performance catalysts. Mechanistic studies using Chemkin-Pro demonstrated that the H<sub>2</sub> addition promotes radical-driven pathways, facilitating NH<sub>3</sub> activation and accelerating N<sub>2</sub> formation. A noble metal catalyst (1 wt% Pd/Al<sub>2</sub>O<sub>3</sub>) and three metal oxide catalysts (CuO, Mn<sub>2</sub>O<sub>3</sub>, and CeO<sub>2</sub>) were evaluated for their catalytic performance in NH<sub>3</sub>/H<sub>2</sub> co-combustion. Among the tested catalysts, CuO demonstrated superior catalytic performance, achieving 100 % NH<sub>3</sub> and H<sub>2</sub> conversion with nearly 100 % N<sub>2</sub> selectivity at 550 °C–800 °C, which was attributed to its enriched surface-adsorbed oxygen species and superior redox property. A comparative analysis of catalytic NH<sub>3</sub> combustion and NH<sub>3</sub>/H<sub>2</sub> co-combustion further elucidated the role of H<sub>2</sub>, revealing that it exerted a minimal influence on NH<sub>3</sub> conversion but considerably improved the N<sub>2</sub> selectivity of metal oxide catalysts.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"708 ","pages":"Article 120567"},"PeriodicalIF":4.8,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Balancing Ce covering and Ni dispersion by precipitant dropwise addition control in Ni-Ce0.8Zr0.2O2 catalyst for dry reforming of methane 甲烷干重整Ni- ce0.8 zr0.2 o2催化剂中沉淀剂滴加控制平衡Ce覆盖和Ni分散
IF 4.8 2区 化学
Applied Catalysis A: General Pub Date : 2025-09-12 DOI: 10.1016/j.apcata.2025.120565
Geon-Hyeong Lee , Hyeon-Seok Kang , Jung-Hoon Lee , Dong-Seong Kim , Dae-Woon Jeong , Hyun-Seog Roh , Yeol-Lim Lee
{"title":"Balancing Ce covering and Ni dispersion by precipitant dropwise addition control in Ni-Ce0.8Zr0.2O2 catalyst for dry reforming of methane","authors":"Geon-Hyeong Lee ,&nbsp;Hyeon-Seok Kang ,&nbsp;Jung-Hoon Lee ,&nbsp;Dong-Seong Kim ,&nbsp;Dae-Woon Jeong ,&nbsp;Hyun-Seog Roh ,&nbsp;Yeol-Lim Lee","doi":"10.1016/j.apcata.2025.120565","DOIUrl":"10.1016/j.apcata.2025.120565","url":null,"abstract":"<div><div>Ni-Ce<sub>0.8</sub>Zr<sub>0.2</sub>O<sub>2</sub> catalysts were synthesized via co-precipitation by varying the precipitant dropwise addition time (0, 5, 10, 20 min) to control nucleation and growth dynamics. This parameter critically influences the physicochemical properties of the catalysts, particularly the oxygen storage capacity (OSC) and Ni dispersion. Rapid dropwise addition (0, 5 min) resulted in insufficient lattice distortion, yielding fewer oxygen vacancies and lower oxygen storage capacity. Conversely, overly slow dropwise addition (20 min) led to excessive Ce<sup>3 +</sup> migration, promoting the Ce covering effect and suppressing Ni<sup>0</sup> dispersion. An optimal dropwise addition time (10 min) revealed balanced characteristics with high OSC and superior Ni<sup>0</sup> dispersion, leading to improved catalytic activity and stability in the dry reforming of methane. These findings demonstrate that fine-tuning of precipitation kinetics is crucial for optimizing Ce-Ni interfacial phenomena and maximizing catalytic performance.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"708 ","pages":"Article 120565"},"PeriodicalIF":4.8,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimizing Mn-based high-entropy perovskite oxides via A-site substitution for enhanced catalytic oxidation of VOCs 通过a位取代优化mn基高熵钙钛矿氧化物对挥发性有机化合物的增强催化氧化
IF 4.8 2区 化学
Applied Catalysis A: General Pub Date : 2025-09-12 DOI: 10.1016/j.apcata.2025.120566
Tiantian Qi, Weidong Zhang, Jingchong Yan, Zhanku Li, Shigang Kang, Shibiao Ren, Zhiping Lei, Zhicai Wang, Hengfu Shui
{"title":"Optimizing Mn-based high-entropy perovskite oxides via A-site substitution for enhanced catalytic oxidation of VOCs","authors":"Tiantian Qi,&nbsp;Weidong Zhang,&nbsp;Jingchong Yan,&nbsp;Zhanku Li,&nbsp;Shigang Kang,&nbsp;Shibiao Ren,&nbsp;Zhiping Lei,&nbsp;Zhicai Wang,&nbsp;Hengfu Shui","doi":"10.1016/j.apcata.2025.120566","DOIUrl":"10.1016/j.apcata.2025.120566","url":null,"abstract":"<div><div>Developing efficient catalysts for VOCs abatement with superior low-temperature activity, stability, and cost-effectiveness remains challenging. This study synthesized novel Mn-based high-entropy perovskite oxides with A-site substitution (nominal composition: RE<sub>0.8</sub>Mg<sub>0.05</sub>Ca<sub>0.05</sub>Sr<sub>0.05</sub>Ba<sub>0.05</sub>MnO<sub>3</sub>, RE = La, Nd, Sm) via sucrose sol-gel method and evaluated their performance for total oxidation of representative VOCs, propane and toluene. Characterization results show that substituting the A-site with Nd (NdMn-HEO) induced the highest lattice distortion, the weakest Mn−O bond strength, the largest specific surface area (31.5 m<sup>2</sup> g<sup>−1</sup>), the highest oxygen vacancy concentration, the greatest Mn<sup>4+</sup>/Mn<sup>3+</sup> ratio, and superior low-temperature reducibility. As a result, NdMn-HEPO exhibits optimal activity (T<sub>90</sub> = 311°C for propane; 236°C for toluene), surpassing LaMn-HEO and SmMn-HEO. This performance enhancement is attributed to the synergistic effect of multi-component A-site elements, which promotes lattice distortion, oxygen vacancy formation, and optimization of redox properties. Furthermore, NdMn-HEO demonstrates excellent stability and durability in propane oxidation, maintaining high activity after four cycles and 22 h of continuous testing. The catalyst also shows good adaptability high WHSV, excellent water resistance, and strong sulfur resistance (minimal activity loss, ΔT<sub>90</sub> = 5°C), highlighting its potential for industrial applications. A-site engineering in high-entropy perovskites optimizes active-site environments, offering a robust strategy for designing practical VOCs oxidation catalysts.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"708 ","pages":"Article 120566"},"PeriodicalIF":4.8,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145096813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信