Applied Catalysis A: General最新文献

Enhanced oxidation of p-methoxytoluene to p-methoxybenzaldehyde using Na-doped Co-Mn-Al oxide catalysts na掺杂Co-Mn-Al氧化物催化对甲氧基甲苯氧化制对甲氧基苯甲醛

IF 4.8 2区化学

Applied Catalysis A: General Pub Date : 2025-07-27 DOI: 10.1016/j.apcata.2025.120465

Tianchi Zhang , Yaoting Wen , Chenglong Xia , Xuhui Xu , Guoping Wang , Jiaxin Guo , Yongcai Zhang

引用次数: 0

Mesoporous pseudo-ordered alumina doped with yttrium as a support for NiW hydrodesulfurization catalysts 掺杂钇的介孔准有序氧化铝作为NiW加氢脱硫催化剂的载体

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-07-25 DOI: 10.1016/j.apcata.2025.120462

C.E. Soto-Arteaga , S. Fuentes-Moyado , G. Díaz , G. Guzmán-Navarro , C. Sepulveda , D. Domínguez , J.N. Díaz de León

{"title":"Mesoporous pseudo-ordered alumina doped with yttrium as a support for NiW hydrodesulfurization catalysts","authors":"C.E. Soto-Arteaga , S. Fuentes-Moyado , G. Díaz , G. Guzmán-Navarro , C. Sepulveda , D. Domínguez , J.N. Díaz de León","doi":"10.1016/j.apcata.2025.120462","DOIUrl":"10.1016/j.apcata.2025.120462","url":null,"abstract":"<div><div>In recent years, publications on how to improve hydrodesulfurization catalysts have decreased considerably. However, the presence of sulfur compounds in oil cuts continues to increase and still represents a challenge to comply with environmental regulations. In this direction, improving hydrodesulfurization catalysts is of paramount importance. The present study focuses on combining two approaches to modify the alumina surface and bulk properties, namely, using an ordered porous structure and doping it with yttrium. We synthesized AlY-x (x as 0, 0.5, 1.0, and 1.5 yttrium substitutions in a alumina unit cell) materials via a one-pot sol<img>gel route assisted by citric acid and P-123. The samples were calcined at 800 °C and 1000 °C to determine their stability. The support samples were subsequently used to prepare NiW/AlY-x catalysts to be applied in hydrodesulfurization (HDS) reactions via 3-methyl-thiophene (3MT), dibenzothiophene (DBT), as naphtha and diesel sulfur model compounds. The results indicate that yttrium promotes stability, enhances textural properties, increases the CO2 adsorption capacity and changes the acid<img>base properties of the supports. In the case of the NiW/AlY-x catalyst, the presence of yttrium results in better dispersion, decreasing the WS2 slabs and improving the participation of Ni in the nonstoichiometric NiWS active phase . These improvements led to selectivity resulting almost exclusively from the direct desulfurization route. Among all the catalysts tested, NiW/AlY-1.0 resulted in approximately 4.6 times greater activity than the yttrium-free sample.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"705 ","pages":"Article 120462"},"PeriodicalIF":4.7,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714217","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

WOx promotion on Pd/Al2O3 for toluene combustion: Adopting monolayer dispersion effect to fabricate low Pd content catalysts WOx对甲苯燃烧Pd/Al2O3的促进作用：采用单层分散效应制备低Pd含量催化剂

IF 4.8 2区化学

Applied Catalysis A: General Pub Date : 2025-07-25 DOI: 10.1016/j.apcata.2025.120463

Teng Liu , Haiming Yan , Shijing Zhang , Junwei Xu , Yi Pei , Junhua Cao , Xiuzhong Fang , Jiating Shen , Xiang Wang

{"title":"WOx promotion on Pd/Al2O3 for toluene combustion: Adopting monolayer dispersion effect to fabricate low Pd content catalysts","authors":"Teng Liu , Haiming Yan , Shijing Zhang , Junwei Xu , Yi Pei , Junhua Cao , Xiuzhong Fang , Jiating Shen , Xiang Wang","doi":"10.1016/j.apcata.2025.120463","DOIUrl":"10.1016/j.apcata.2025.120463","url":null,"abstract":"<div><div>This study investigates the influence of WOx loading on the WOx-modified Pd/Al2O3 catalyst with low Pd content for the catalytic combustion of toluene. Pd/Wx-Al2O3 catalysts with varying WOx loadings were synthesized using the wet impregnation method, based on the monolayer dispersion theory. The monolayer dispersion threshold of WOx on Al2O3 is 0.717 mmol/100 m², which corresponds to a WOx loading of 20 wt%. When the WOx loading is below this threshold, the WOx species on the Al2O3 surface primarily exist as tungstate. Conversely, if the WOx loading exceeds the monolayer dispersion threshold, crystalline WO3 forms. At the monolayer dispersion threshold, the Pd/W20-Al2O3 catalyst exhibits the highest concentration of acidic sites and reactive oxygen species (O₂²⁻ and O₂⁻), demonstrating optimal catalytic activity for toluene combustion. Furthermore, Pd/W20-Al2O3 exhibits excellent long-term stability and resistance to water and sulfur. WOx loadings above or below the monolayer dispersion threshold also influence the reaction pathway of toluene catalytic combustion.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"705 ","pages":"Article 120463"},"PeriodicalIF":4.8,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723366","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

Highly active gold nanoparticles encapsulated in amorphous silicon oxide for CO oxidation 高活性金纳米粒子封装在非晶氧化硅中用于CO氧化

IF 4.8 2区化学

Applied Catalysis A: General Pub Date : 2025-07-24 DOI: 10.1016/j.apcata.2025.120460

Nobuko Tsumori , Liyu Chen , Yuki Nishita , Shun Nishimura , Qiang Xu

{"title":"Highly active gold nanoparticles encapsulated in amorphous silicon oxide for CO oxidation","authors":"Nobuko Tsumori , Liyu Chen , Yuki Nishita , Shun Nishimura , Qiang Xu","doi":"10.1016/j.apcata.2025.120460","DOIUrl":"10.1016/j.apcata.2025.120460","url":null,"abstract":"<div><div>Gold nanoparticles encapsulated in amorphous silicon oxide (18Au@SiO2_H2) exhibit high catalytic activity for CO oxidation over a wide temperature range (from 203 to 673 K). Characterizations of the catalysts revealed strong interactions between slight positively charged gold nanoparticles and amorphous silicon oxide, which are responsible for the high catalytic activity. Gold nanoparticle catalysts prepared using different concentrations of the HAuCl4 precursor and different reducing agents have been compared to determine the effects of the above parameters on the catalytic activity. Increase in the concentration of HAuCl4 precursor, decreases the pH; in turn changes the shape of the silicon oxide even on retention of hydrocarbon groups in supports. 18Au@SiO2_H2 catalyst prepared with 2.0 % HAuCl4aq was found to have the optimal support, in suggesting the change in the reaction mechanism of CO oxidation depends on the shape of the silicon oxide. This catalyst maintained high activity over a wide temperature range.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"705 ","pages":"Article 120460"},"PeriodicalIF":4.8,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723367","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

Production of hydrocarbon from CO2-FT reaction over Fe-based catalysts: Effect of the promoter and bimetallic Fe-Metal carbide 铁基催化剂上CO2-FT反应制烃：促进剂和双金属铁-金属碳化物的影响

IF 4.8 2区化学

Applied Catalysis A: General Pub Date : 2025-07-23 DOI: 10.1016/j.apcata.2025.120459

Colomba Capo Pérez , Elodie Blanco

{"title":"Production of hydrocarbon from CO2-FT reaction over Fe-based catalysts: Effect of the promoter and bimetallic Fe-Metal carbide","authors":"Colomba Capo Pérez , Elodie Blanco","doi":"10.1016/j.apcata.2025.120459","DOIUrl":"10.1016/j.apcata.2025.120459","url":null,"abstract":"<div><div>The present work evaluates the effect of two alkali promoters (K and Mg) over Fe-monometallic (Fe, Mo, and Re) and bimetallic Fe-metal carbides catalysts in the CO2-FT reaction. Catalysts were characterized by N2-sorption isotherm, XRD, TPR, and XPS techniques and evaluated at 350ºC, 20 bar, CO2/H2 ratio of 1:3, and GHSV of 2000 mL·g⁻¹ ·h⁻¹ . The most active catalysts were K-Mo2C, which produced principally CO and C4+ products, while the K-Re-Fe and Mg-Re-Fe catalysts were the most selective toward hydrocarbons. From the characterization results, Mg was shown to promote the formation of more reduced/carburized phases in all the systems, enhancing the RWGS and FTS. In contrast, K promotes the formation of smaller particles. An anti-synergistic effect was detected in the K-Fe-Mo catalyst and associated with forming a bimetallic FeMo phase that is less active in CO2 conversion. In contrast, in the case of Re-Fe bimetallic systems, the catalytic results were associated with a synergistic effect between Fe and Re.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"705 ","pages":"Article 120459"},"PeriodicalIF":4.8,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144720804","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

Synergistic promotion photocatalytic H2O2 production over modified g-C3N4 via defect and doping engineering 通过缺陷和掺杂工程协同促进改性g-C3N4光催化产H2O2

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-07-22 DOI: 10.1016/j.apcata.2025.120458

Ruxue Ma , Siqi Li , Yi Xiong , Jing Wang , Xinxin Guan , Jun Li , Xiucheng Zheng

{"title":"Synergistic promotion photocatalytic H2O2 production over modified g-C3N4 via defect and doping engineering","authors":"Ruxue Ma , Siqi Li , Yi Xiong , Jing Wang , Xinxin Guan , Jun Li , Xiucheng Zheng","doi":"10.1016/j.apcata.2025.120458","DOIUrl":"10.1016/j.apcata.2025.120458","url":null,"abstract":"<div><div>Potassium dopants and nitrogen defects are simultaneously introduced into graphitic carbon nitride (g-C3N4, abbreviated as CN) with a facile one-pot direct calcination strategy. The co-calcination of melamine with KCl and oxamide leads to exciting positive influence, such as reducing the intermolecular aggregation, preventing the excessive crystal growth and tight stacking between layers, extending the interlayer stacking time, and favoring the formation of additional pores. Therefore, the resulting materials deliver superior performance to the pristine CN. Especially, the optimal CPCN, which is fabricated with a molar ratio of 1: 1 for melamine to oxamide, exhibits exceptional photocatalytic behavior in H2O2 production, and the concentration of H2O2 produced can reach 470.84 μM within 4 h in the presence of CPCN (0.5 mg mL−1) irradiated by visible light, nearly 50 times that of CN. The corresponding H2O2 production rate is 1569.45 µmol g–1 h–1, significantly higher than the results over CN-based materials reported in literature. Moreover, the concentration and production rate can further separately increase to 1170.37 μM and 3901.22 µmol g–1 h–1 irradiated by the simulated sunlight. Also, CPCN depicts superior photocatalytic performance in the degradation of organic pollutants (such as rhodamine B dye and oxytetracycline antibiotic) in water to the control samples. This study not only develops an interesting avenue for the rational design of high-performance CN-based photocatalysts, but also offers some meaningful insights on photocatalytic H2O2 production and organic contaminant degradation.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"705 ","pages":"Article 120458"},"PeriodicalIF":4.7,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686127","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

Efficient and recyclable tetramethylguanidine-functionalized polyacrylonitrile fiber catalyst tailored for high-yield knoevenagel condensation 高效可回收的四甲基胍功能化聚丙烯腈纤维催化剂，专为高收率knoevenagel缩合而设计

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-07-22 DOI: 10.1016/j.apcata.2025.120456

Yanfei Zhang , Jinxin Liu , Xiaoting Li , Ning Ma , Minli Tao , Wenqin Zhang

{"title":"Efficient and recyclable tetramethylguanidine-functionalized polyacrylonitrile fiber catalyst tailored for high-yield knoevenagel condensation","authors":"Yanfei Zhang , Jinxin Liu , Xiaoting Li , Ning Ma , Minli Tao , Wenqin Zhang","doi":"10.1016/j.apcata.2025.120456","DOIUrl":"10.1016/j.apcata.2025.120456","url":null,"abstract":"<div><div>This work presents a novel and recyclable tetramethylguanidine-modified polyacrylonitrile fiber catalyst (PANMGF), specifically designed for the Knoevenagel condensation reaction, which is a crucial method in organic synthesis for C<img>C bond formation. The PANMGF was characterized through Fourier-transform infrared spectroscopy (FT-IR), elemental analysis (EA), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and mechanical performance analysis. These results collectively confirmed the successful grafting of dimethylcyanamide as a guanidine precursor, which was subsequently converted into tetramethylguanidine functionalities on the PANMGF. Under mild conditions of 40 °C with H2O as the solvent for a 12-hour reaction, the PANMGF exhibited superior catalytic performance, with a yield of 97 %. A thorough investigation of various benzaldehyde substrates revealed yields exceeding 90 % for both electron-withdrawing and electron-donating derivatives. These results demonstrate the remarkable substrate versatility and broad applicability of this catalyst. Moreover, when applied to other active methylene substrates, such as methyl cyanoacetate and malononitrile, the PANMGF achieved yields of 97 % and 98 %, respectively. These results collectively underscore its broad substrate scope across 28 different substrates and exceptional stability, which maintained a yield of 91.1 % even after 14 cycles, with an 89.9 % yield observed in the 15th cycle. Additionally, gram-scale experiments yielded a high separation efficiency of 93.6 %, further reinforcing the significant potential of PANMGF for practical applications in sustainable organic synthesis.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"705 ","pages":"Article 120456"},"PeriodicalIF":4.7,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696531","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

Coordination number dependence of Pt catalysts for catalytic decomposition of aqueous hydroxylammonium nitrate (HAN) Pt催化剂催化分解硝酸羟铵配位数依赖性研究

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-07-21 DOI: 10.1016/j.apcata.2025.120457

Shu Liu , Yujia Han , Teng Zong , Chaojie Wang , Ming Tian , Lin Li , Wansheng Zhang , Wentao Wang , Xiaodong Wang

{"title":"Coordination number dependence of Pt catalysts for catalytic decomposition of aqueous hydroxylammonium nitrate (HAN)","authors":"Shu Liu , Yujia Han , Teng Zong , Chaojie Wang , Ming Tian , Lin Li , Wansheng Zhang , Wentao Wang , Xiaodong Wang","doi":"10.1016/j.apcata.2025.120457","DOIUrl":"10.1016/j.apcata.2025.120457","url":null,"abstract":"<div><div>To uncover the relation between active metals structure and the adsorption, activation as well as its decomposition performance of hydroxylamine nitrate (HAN) that has been considered to be a promising low-toxicity monopropellant for spacecrafts, the performance of xPt/Al2O3 with various Pt loadings (x = 0.1, 0.5, 1 and 2, indicates the mass percentage of Pt) was evaluated in the aqueous HAN (10 wt%) decomposition. It was found that the both the NH3OH+ conversion and the turnover frequency (TOF) enhanced as Pt loadings increased while NO3- was hardly converted at the temperature of lower than 120 ℃ for xPt/Al2O3, and 2Pt/Al2O3 exhibited the best activity with almost 100 % NH3OH+ conversion, 20 % NH4+ selectivity and 80 % N2O selectivity at around 120 ℃, respectively. This originated from the increased Pt coordinated number of active sites with sufficiently continuous Pt sites caused by its enhanced particle size with loadings, which was beneficial to the cracking of N-O, O-H and N-H bonds together thus the activation and conversion of NH3OH+ to NH4+ and N2O.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"705 ","pages":"Article 120457"},"PeriodicalIF":4.7,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144696557","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

Exploring the bifunctional role of Pd/ZrO2-TiO2 in the production of secondary amines via reductive amination of furfural 探索Pd/ZrO2-TiO2在糠醛还原胺化生产仲胺中的双功能作用

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-07-18 DOI: 10.1016/j.apcata.2025.120455

Alex A. Fernández-Andrade , John A. Vergara , Daviel Gómez , Daniela González-Vera , Cristian H. Campos , Joan M. Rodríguez-Díaz , Luis E. Arteaga-Pérez

{"title":"Exploring the bifunctional role of Pd/ZrO2-TiO2 in the production of secondary amines via reductive amination of furfural","authors":"Alex A. Fernández-Andrade , John A. Vergara , Daviel Gómez , Daniela González-Vera , Cristian H. Campos , Joan M. Rodríguez-Díaz , Luis E. Arteaga-Pérez","doi":"10.1016/j.apcata.2025.120455","DOIUrl":"10.1016/j.apcata.2025.120455","url":null,"abstract":"<div><div>Environmental concerns and the pressing need for sustainable technologies have increased the interest in furfural (FUR) amination as an environmentally friendly alternative to current petroleum-based amination processes. Here we systematically investigate the bifunctional effect of Pd/ZrO2-TiO2 for the one-pot reductive amination of FUR with aniline (ANI) using H2 as the reducing agent. The structural characterization of Pd/ZrO2-TiO2 indicated Ti atom substitutions by Zr, highly dispersed Zr sites, and modulated acidity. The Pd/ZrO2-TiO2 catalyst was active and stable for converting FUR into N-furfurylaniline (FFA) following a sequential reaction map, involving the formation of an intermediate imine (IME), with subsequent hydrogenation. The water formed in the first reaction step does not interfere in the reaction performance as confirmed by FTIR-ATR in situ measurements. Finally, the effectiveness of the catalyst was explained by the presence of acid sites which enhance C<img>O and N = H activation, with subsequent hydrogenation promoted by Pd0 sites.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"705 ","pages":"Article 120455"},"PeriodicalIF":4.7,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144663185","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

In-situ growth of NiFe-LDH/fluoride heterostructures on FeN4/C for bifunctional oxygen electrocatalysis 双功能氧电催化在FeN4/C上原位生长NiFe-LDH/氟化物异质结构

IF 4.7 2区化学

Applied Catalysis A: General Pub Date : 2025-07-16 DOI: 10.1016/j.apcata.2025.120454

Jie Yang , Lixia Ma , Yuqi Zhang , Xuqian Zhao , Shouren Zhang , Luo Huang , Yunpeng Fang , Xiaojie Zhou , Jianghao Kang , Ruibin Jiang

{"title":"In-situ growth of NiFe-LDH/fluoride heterostructures on FeN4/C for bifunctional oxygen electrocatalysis","authors":"Jie Yang , Lixia Ma , Yuqi Zhang , Xuqian Zhao , Shouren Zhang , Luo Huang , Yunpeng Fang , Xiaojie Zhou , Jianghao Kang , Ruibin Jiang","doi":"10.1016/j.apcata.2025.120454","DOIUrl":"10.1016/j.apcata.2025.120454","url":null,"abstract":"<div><div>The design of low-cost and highly efficient bifunctional electrocatalyst towards oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is challengeable, which limits the commercial application of rechargeable zinc-air battery. Herein, an efficient ORR and OER bifunctional electrocatalyst (NiFe-LDH/Fx−FeN4/C) is composed of nickel/iron-based heterostructures sparsely grown on carbon black (CB) with single FeN4 sites. The NiFe-LDH/Fx−FeN4/C electrocatalysts are prepared through the pyrolysis of hemin chloride adsorbed on CB, followed by in-situ hydrothermal growth of NiFe-LDH/Fx heterostructures. The NiFe-LDH/Fx heterostructures are composed of NiFe-LDH, (NH4)3FeF6, and NiF2. The elevated valence states of Fe and Ni in heterostructures significantly increase the OER activity. The mesopores and large pores of the NiFe-LDH/Fx−FeN4/C facilitate the exposure of active sites and enhance mass transfer. These features contribute to the outstanding bifunctional activity of NiFe-LDH/Fx−FeN4/C, achieving a half-wave potential of 0.906 V for the ORR, an OER overpotential of 246 mV at 10 mA cm−2, and an extremely small voltage gap of 0.57 V. Additionally, the NiFe-LDH/Fx−FeN4/C-based RZAB also exhibits a peak power density of 209 mW cm−2 and charging/discharging cycling stability for 445 h. This work establishes a novel strategy for the preparation of highly efficient bifunctional electrocatalysts through in-situ growth and heterostructure engineering.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"705 ","pages":"Article 120454"},"PeriodicalIF":4.7,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655561","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