Catalysis Letters最新文献_第2页

Effect of Copper Loading on Methanol Oxidation Over Cu/TiO2 Catalysts: Insight into Structure-Activity Relationship 铜负载对Cu/TiO2催化剂上甲醇氧化的影响：构效关系研究

IF 2.5 4区化学

Catalysis Letters Pub Date : 2026-08-22 DOI: 10.1007/s10562-026-05505-2

Sihan Yin, Zhitao Han, Yang Che, Junhao Jing, Jiyue Wang, Liangzheng Lin, Yangbo Deng

{"title":"Effect of Copper Loading on Methanol Oxidation Over Cu/TiO2 Catalysts: Insight into Structure-Activity Relationship","authors":"Sihan Yin, Zhitao Han, Yang Che, Junhao Jing, Jiyue Wang, Liangzheng Lin, Yangbo Deng","doi":"10.1007/s10562-026-05505-2","DOIUrl":"10.1007/s10562-026-05505-2","url":null,"abstract":"<div><p>Methanol slip from methanol-fueled engines has attracted increasing concern due to its negative impacts on the environment and human health, which has led to high expectations for efficient catalytic oxidation technologies. In this study, a series of xCu/ TiO<sub>2</sub> (x = 0–15 wt%) catalysts with different copper loadings were prepared by an impregnation method to investigate the effect of copper loading on the catalytic oxidation of methanol. The results showed that the catalytic activity of the xCu/ TiO<sub>2</sub> catalysts first increased and then decreased with increasing copper loading. Among them, the optimally formulated 5Cu/TiO<sub>2</sub> catalyst achieved 98.8% methanol conversion at 170 ℃ and maintained over 99% CO<sub>2</sub> selectivity over a relatively wide temperature range of 160–450 ℃. Structural characterization revealed that at low loadings, copper species were highly dispersed on the TiO<sub>2</sub> support, whereas excessive copper loading led to the aggregation of CuO particles. Moreover, the 5Cu/ TiO<sub>2</sub> catalyst possessed the highest proportion of surface-adsorbed oxygen species and excellent redox properties, which facilitated oxygen activation and the methanol oxidation reaction. This study offers important guidance for the rational design of efficient methanol oxidation catalysts.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Mn Doping Regulates Surface Oxygen Defects of ZnOx to Promote Tandem CO2 Hydrogenation to Light Olefins Mn掺杂调控ZnOx表面氧缺陷促进CO2串联加氢制轻烯烃

IF 2.5 4区化学

Catalysis Letters Pub Date : 2026-08-21 DOI: 10.1007/s10562-026-05501-6

Tao Peng, Liang Ma, He Xu, Rong Liu, Wenzhuo Bao, Xiaoyan Liu, Ting Su, Kai Wu, Yu Meng

{"title":"Mn Doping Regulates Surface Oxygen Defects of ZnOx to Promote Tandem CO2 Hydrogenation to Light Olefins","authors":"Tao Peng, Liang Ma, He Xu, Rong Liu, Wenzhuo Bao, Xiaoyan Liu, Ting Su, Kai Wu, Yu Meng","doi":"10.1007/s10562-026-05501-6","DOIUrl":"10.1007/s10562-026-05501-6","url":null,"abstract":"<div><p>Mn-doped ZnO<sub>x</sub> composite oxides with tunable Mn/(Mn + Zn) molar ratios were synthesized by co-precipitation and integrated with SAPO-34 to construct bifunctional tandem catalysts for CO<sub>2</sub> hydrogenation to light olefins. The effects of Mn incorporation on phase evolution, surface oxygen vacancies, adsorption–activation properties, and reaction intermediates were systematically elucidated. Moderate Mn incorporation modifies the local ZnO structure, whereas excessive Mn induces ZnMn<sub>2</sub>O<sub>4</sub> spinel formation. Among the catalysts, 30%Mn-ZnO<sub>x</sub> exhibits the highest fraction of defect/adsorbed oxygen species which is accompanied by enhanced CO<sub>2</sub> adsorption and H<sub>2</sub> activation behavior. H<sub>2</sub>-TPD, CO<sub>2</sub>-TPD, and DRIFTS collectively indicate improved activation matching and the formation of HCOO* and CH<sub>3</sub>O* intermediates, suggesting a possible formate-related hydrogenation route. When coupled with SAPO-34, 30%Mn-ZnO<sub>x</sub>/SAPO-34 achieves a CO<sub>2</sub> conversion of 12.57% and ca. 80% light-olefin selectivity under optimized conditions, while maintaining stable performance over 100 h. This work highlights Mn-induced vacancy engineering as an effective strategy for designing Zn-based oxide/zeolite tandem catalysts.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148783345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Correction to: Tuning the Electrocatalytic Performance of Cobalt Thin Films via Oxygen Annealing for Oxygen Evolution Reactions in Alkaline Media 修正：通过氧退火调整钴薄膜在碱性介质中析氧反应的电催化性能

IF 2.5 4区化学

Catalysis Letters Pub Date : 2026-08-19 DOI: 10.1007/s10562-026-05486-2

K. Poshan Kumar Reddy, K. M. M. D. K. Kimbulapitiya, Sumayah Shakil Wani, Nishchal Bharadwaj, Shyam Narayan Singh Yadav, Srikant Kumar Mohanty, G. Phaneendra Reddy, Bushra Rehman, P. R. Sekhar Reddy

引用次数: 0

Poly(Ionic Liquid)/Polymeric Carbon Nitride Composites as Efficient Heterogeneous Photocatalysts for Oxidative Coupling of Benzylamines 聚离子液体/聚合物氮化碳复合材料作为苯胺氧化偶联的高效非均相光催化剂

IF 2.5 4区化学

Catalysis Letters Pub Date : 2026-08-18 DOI: 10.1007/s10562-026-05503-4

Xiaorong Luo, Xiang Li, Yun Zhu, Yawen Hu, Limei Zhou, Li Qin

{"title":"Poly(Ionic Liquid)/Polymeric Carbon Nitride Composites as Efficient Heterogeneous Photocatalysts for Oxidative Coupling of Benzylamines","authors":"Xiaorong Luo, Xiang Li, Yun Zhu, Yawen Hu, Limei Zhou, Li Qin","doi":"10.1007/s10562-026-05503-4","DOIUrl":"10.1007/s10562-026-05503-4","url":null,"abstract":"<div><p>A series of poly (1-hexyl-3-vinylimidazolium bromide) (<b>P[HVIM]Br</b>)/polymeric carbon nitride (PCN) composites were synthesized via in-situ radical copolymerization of ionic liquid monomer with divinylbenzene (DVB) in the presence of PCN. The swelling behavior of crosslinked poly(ionic liquid)s (PILs) was systematically investigated, and PILs-0.8 (with 0.8 mol% DVB) exhibited the highest swelling capacity in polar solvents. The optimized composite, PILs/PCN-0.8-50 (50wt% PCN), demonstrated superior photocatalytic activity in the aerobic oxidative coupling of benzylamines under visible light irradiation, achieving 98% conversion within 9 h in DMF. Radical trapping experiments revealed that photogenerated electrons (e<sup>-</sup>), superoxide radicals (‧O<sub>2</sub><sup>-</sup>), and holes (h<sup>+</sup>) are the primary active species. The enhanced performance is attributed to the synergistic effect between the electron-rich PCN and the ionic conductive PILs, which facilitate charge separation and substrate enrichment. This work provides a facile strategy for designing polymer-semiconductor hybrid photocatalysts with improved efficiency and recyclability.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Effect of Ir Dispersion and Surface Acidity on Low-Temperature NH3-SCO Activity Over Ir/CeZrOx Catalysts Ir分散和表面酸度对Ir/CeZrOx催化剂上NH3-SCO低温活性的影响

IF 2.5 4区化学

Catalysis Letters Pub Date : 2026-08-18 DOI: 10.1007/s10562-026-05500-7

Meng Li, Zhitao Han, Qingliang Zeng, You Tian, Fengming Cao, Bingfeng Wang

{"title":"Effect of Ir Dispersion and Surface Acidity on Low-Temperature NH3-SCO Activity Over Ir/CeZrOx Catalysts","authors":"Meng Li, Zhitao Han, Qingliang Zeng, You Tian, Fengming Cao, Bingfeng Wang","doi":"10.1007/s10562-026-05500-7","DOIUrl":"10.1007/s10562-026-05500-7","url":null,"abstract":"<div><p>Selective catalytic oxidation of ammonia (NH<sub>3</sub>-SCO) is an efficient technology for removing unburned NH<sub>3</sub> from exhaust gases. Nonetheless, the synthesis method of the support significantly influences NH<sub>3</sub>-SCO catalyst performance. Herein, CeZrO<sub><i>x</i></sub> mixed oxides were chosen as supports and they were prepared via two different methods: sol–gel and co-precipitation. Subsequently, Ir element as active species was loaded over CeZrO<sub><i>x</i></sub> supports through impregnation method. The effect of support preparation method on NH<sub>3</sub>-SCO performance of Ir/CeZrO<sub><i>x</i></sub> catalysts was evaluated. The results demonstrated that, Ir/CeZrO<sub><i>x</i></sub>-R catalyst possessed excellent low-temperature activity, which could achieve 100% NH<sub>3</sub> conversion at 250 ℃, approximately 70 ℃ lower than that of Ir/CeZrO<sub><i>x</i></sub>-C catalyst. TEM and EDS analyses suggested that Ir species in Ir/CeZrO<sub><i>x</i></sub>-R catalyst were highly dispersed as nanoparticles on the CeZrO<sub><i>x</i></sub>-R support, whereas Ir species in Ir/CeZrO<sub><i>x</i></sub>-C catalyst agglomerated obviously and formed cluster-like structures. Combined XPS, NH<sub>3</sub>-TPD, and in situ DRIFTS results demonstrated that Ir/CeZrO<sub><i>x</i></sub>-R catalyst possessed richer Lewis and Brønsted acid sites, which facilitated NH<sub>3</sub> adsorption and activation, thereby significantly enhancing to its superior low-temperature NH<sub>3</sub>-SCO activity. In addition, Ir/CeZrO<sub><i>x</i></sub>-C catalyst followed the i-SCR mechanism, whereas Ir/CeZrO<sub><i>x</i></sub>-R catalyst simultaneously underwent the i-SCR and -NH pathways, providing additional routes for NH<sub>3</sub> conversion and contributing to excellent catalytic activity.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Cobalt and Nitrogen Functionalised Carbon Nano-onions as an Efficient Catalyst for the Oxygen Reduction Reaction in Alkaline Medium 钴氮功能化碳纳米洋葱作为碱性介质中氧还原反应的高效催化剂

IF 2.5 4区化学

Catalysis Letters Pub Date : 2026-08-17 DOI: 10.1007/s10562-026-05502-5

Snigdha Toms, Imran Jafri Razack

{"title":"Cobalt and Nitrogen Functionalised Carbon Nano-onions as an Efficient Catalyst for the Oxygen Reduction Reaction in Alkaline Medium","authors":"Snigdha Toms, Imran Jafri Razack","doi":"10.1007/s10562-026-05502-5","DOIUrl":"10.1007/s10562-026-05502-5","url":null,"abstract":"<div><p>The advancement of fuel cell technologies depends on the design of durable and efficient noble-metal-free electrocatalysts for the oxygen reduction reaction (ORR). In this work, Co-N active sites are successfully engineered onto carbon nano onions (CoNCNO), synthesised via flame pyrolysis of olive oil. The concentric graphitic layered structure of the catalyst is confirmed by HR-TEM images, and the mesoporous texture is evidenced by the nitrogen adsorption-desorption isotherms. The electrochemical evaluation of the catalyst in the alkaline medium gives a limiting current density of – 4.62 mA cm<sup>− 2</sup>, which is on par with the current density recorded for commercial Pt/C. CoNCNO exhibits a favourable onset potential (0.91 V vs. RHE) and half-wave potential (0.79 V vs. RHE), along with the calculated electron number of 3.85, supporting its remarkable ORR catalytic activity. Moreover, the catalyst surpasses commercial Pt/C in stability in 0.1 M KOH, retaining 96% of its initial activity after 10,000 s. A better methanol tolerance of CoNCNO underscores its promise as a cathode material for the DMFC.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148782176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Correction to: Phyto-Engineered CoFe2O4/Bentonite Nanocomposites for Fenton-like Degradation of Cotton Blue in Water 修正：植物工程CoFe2O4/膨润土纳米复合材料用于fenton样降解水中棉蓝

IF 2.5 4区化学

Catalysis Letters Pub Date : 2026-08-16 DOI: 10.1007/s10562-026-05453-x

Abrham Biresaw Gebrye, Bewketu Mehari, Minaleshewa Atlabachew, Azanaw Girmaw Mengstu

引用次数: 0

Light-Induced Synthesis of Cu- and N-Co-Doped Carbon-Supported Palladium Nanocatalysts and Study of Their Catalytic Reduction of p-Nitrophenol 光诱导合成Cu和n共掺杂碳负载钯纳米催化剂及其催化还原对硝基苯酚的研究

IF 2.5 4区化学

Catalysis Letters Pub Date : 2026-08-14 DOI: 10.1007/s10562-026-05497-z

Jiayao He, Shuxin Liu, Xiaoxia Tian, Jiuzhou Zhao, Liang Xian

{"title":"Light-Induced Synthesis of Cu- and N-Co-Doped Carbon-Supported Palladium Nanocatalysts and Study of Their Catalytic Reduction of p-Nitrophenol","authors":"Jiayao He, Shuxin Liu, Xiaoxia Tian, Jiuzhou Zhao, Liang Xian","doi":"10.1007/s10562-026-05497-z","DOIUrl":"10.1007/s10562-026-05497-z","url":null,"abstract":"<div><p>In this study, a porous carbon support (CuCN) with a high specific surface area and an N-doped Cu-N-C network was synthesized by pyrolyzing copper acetylacetonate on a metal-organic framework (ZIF-8) at 900 °C. To investigate the relationship between the preparation process and performance of CuCN-supported palladium nanoparticles, a light-induced synthesis method was employed to replace the traditional high-temperature thermal reduction process, enabling the controlled loading of palladium nanoparticles onto CuCN. A Cu- and N-co-doped carbon-supported palladium nanocatalyst (Pd/CuCN-M) was prepared, and the effects of optimal illumination conditions and reducer types on the catalyst were explored. The results show that the Cu- and N-co-doped carbon-supported palladium nanocatalyst, designated Pd/CuCN-M1, prepared using methanol as the reducing agent and irradiated with near-ultraviolet light at 395 nm, exhibits high catalytic activity and stability. The rate constant for the reduction of p-nitrophenol (4-NP) reached 2.1 min⁻¹, and the conversion rate remained at 90.2% after five cycles of stability testing. This study presents a green, convenient, and highly efficient method for synthesizing Pd nanocatalysts, offering a new approach to reducing the use of precious metals and treating p-nitrophenol-based pollutants generated in industrial production.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Retraction Note: Influence of Nickel Doping on the Photocatalytic Activity of Strontium Barium Ferrite for the Degradation of Atrazine under Photon-Fenton System 注：镍掺杂对锶钡铁氧体在光子-芬顿体系下光催化降解阿特拉津活性的影响

IF 2.5 4区化学

Catalysis Letters Pub Date : 2026-08-14 DOI: 10.1007/s10562-026-05499-x

Muhammad Yasar, Aseel A. Kadhem, Fuad M. Alzahrani, Kinza Fatima, Aminjon Kalandarov, Achilova Liliya, Muhammad Muntazir Mehdi, Khalid J. Alzahrani, Muhammad Madni

引用次数: 0

Correction to: Ethylene Polymerization Using α-Diimine Nickel Catalysts with Multiple Hydroxyl Groups and Their Supported Catalysts 修正：多羟基α-二亚胺镍催化剂及其负载催化剂的乙烯聚合

IF 2.5 4区化学

Catalysis Letters Pub Date : 2026-08-14 DOI: 10.1007/s10562-026-05465-7

Lin-Lin Ye, Qin Li, Yan-Hui Hou, Mi-Mi Cui, Bin-Yuan Liu, Min Yang

引用次数: 0