Статья

Optimized Hydroxyl Generation and Replenishment by Structural Defect‐Mediated Fishbone‐Like High‐Entropy Alloy Nanowires Boost Ethanol Oxidation Catalysis

Zhonghong XiaInstitute for Sustainable Energy, Innovation Institute of Carbon Neutrality, Department of Chemistry, College of Sciences Shanghai University Shanghai P. R. ChinaJie ChenInstitute for Sustainable Energy, Innovation Institute of Carbon Neutrality, Department of Chemistry, College of Sciences Shanghai University Shanghai P. R. ChinaJie YangSchool of Environmental & Chemical Engineering Shanghai University Shanghai P. R. ChinaGuopu CaiInstitute for Sustainable Energy, Innovation Institute of Carbon Neutrality, Department of Chemistry, College of Sciences Shanghai University Shanghai P. R. ChinaKaiyang XuSongshan Lake Materials Laboratory Dongguan P. R. ChinaFanghua NingInstitute for Sustainable Energy, Innovation Institute of Carbon Neutrality, Department of Chemistry, College of Sciences Shanghai University Shanghai P. R. ChinaY ZhangSchool of Environmental & Chemical Engineering Shanghai University Shanghai P. R. ChinaShaolong WangCollege of Electrical, Energy and Power Engineering Yangzhou University Yangzhou P. R. ChinaJia HeSchool of Chemistry and Chemical Engineering Tianjin University of Technology Tianjin P. R. ChinaQinbai YunSustainable Energy and Environment Thrust The Hong Kong University of Science and Technology (Guangzhou) Guangzhou P. R. ChinaLifeng LiuSongshan Lake Materials Laboratory Dongguan P. R. ChinaAskar ParmanovDepartment of Chemistry National University of Uzbekistan Tashkent UzbekistanSadia AtaSchool of Chemistry University of the Punjab Lahore PakistanLiang Jason WangCentre for Catalysis and Clean Energy, School of Environment and Science Griffith University Gold Coast AustraliaHongbin ZhaoInstitute for Sustainable Energy, Innovation Institute of Carbon Neutrality, Department of Chemistry, College of Sciences Shanghai University Shanghai P. R. ChinaDengsong ZhangInstitute for Sustainable Energy, Innovation Institute of Carbon Neutrality, Department of Chemistry, College of Sciences Shanghai University Shanghai P. R. China

Advanced Functional Materialsjournal2026en

ABI

Аннотация

ABSTRACT A grand challenge for ethanol oxidation reaction (EOR) catalysts lies in the well trade‐off between catalytic activity, C1 pathway selectivity, and long‐term stability. Herein, a novel type of PtFeCoIrRh fishbone‐like high‐entropy alloy nanowires (FHEANWs) with miscibility gaps between metal components was fabricated. The multiple structural defects associated with lattice distortion characteristic of HEAs endow PtFeCoIrRh FHEANWs with the exceptional activity of 2.85 A mg Pt −1 /1.77 A mg Noble metal −1 and 4.48 mA cm −2 , 7.50/4.66 and 6.69 times more efficient than that of Pt/C, respectively. After long 50 000 s chronoampermetric and 2000 consecutive cycling stability tests, PtFeCoIrRh FHEANWs retain 68.42% and 76.39% of the initial activity. Also, X‐ray adsorption spectroscopy elucidates the structural stability based on the variation in coordination configuration due to elemental migration within the FHEANWs. The attenuated total reflection‐surface enhanced infrared absorption spectroscopy, coupled with theoretical calculations, reveals that the elemental synergism and dynamic balance between hydrogen‐bonded H 2 O and isolated free H 2 O at the solid‐liquid interface facilitate OH* generation and timely replenishment and the more efficient C1 pathway (58.54% selectivity at 1.0 V) while preventing H 2 O passivation. This work paves a new path for designing HEA anisotropic nanostructures featuring structural defects toward superb catalytic activity, stability, and selectivity.

Темы

Electrocatalysts for Energy Conversion High Entropy Alloys Studies Subcritical and Supercritical Water Processes

Идентификаторы

DOI: 10.1002/adfm.75852

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