Iron-molybdenum sulfide electrocatalysts for the hydrogen evolution reaction: An Operando XAS study

被引：0

作者：

Khan, Anastassiya ^{[1
]}

Morozan, Adina ^{[2
]}

Johnson, Hannah ^{[3
]}

Artero, Vincent ^{[2
]}

Zitolo, Andrea ^{[1
]}

机构：

[1] Orme Merisiers, Synchrotron SOLEIL, Dept 128, F-91190 Saint-aubin, France

[2] Univ Grenoble Alpes, CNRS, CEA, IRIG,Lab Chim & Biol Metaux, F-38054 Grenoble, France

[3] Toyota Motor Europe, Mat Engn, Hoge Wei 33, B-1930 Zaventem, Belgium

来源：

ELECTROCHIMICA ACTA | 2025年 / 512卷

关键词：

Iron-molybdenum sulfide; Hydrogen evolution reaction; Electrocatalyst; X-ray absorption spectroscopy; Operando; RAY-ABSORPTION SPECTROSCOPY; BODY DISTRIBUTION-FUNCTIONS; AMORPHOUS MOLYBDENUM; WATER ELECTROLYSIS; CATALYTIC-ACTIVITY; CONDENSED MATTER; RECENT PROGRESS; ENERGY-STORAGE; EDGE SITES; MOS2;

D O I：

10.1016/j.electacta.2024.145418

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The comprehensive characterization of the structure-electrocatalytic activity relationships is of great interest to support the development of efficient catalysts for hydrogen evolution reaction (HER) in proton-exchange membrane (PEM) electrolyzers. The successful implementation of a bimetallic iron-molybdenum sulfide electrocatalyst for HER into a PEM electrolyzer has been reported. However, the precise nature of their active sites is still elusive. In this study, we employed X-ray absorption spectroscopy (XAS) to study iron-molybdenum and molybdenum sulfides obtained by a microwave irradiation synthetic approach. Operando XAS measurements in an acidic environment revealed sulfur-defective amorphous MoSx and FeS phases. Although the amount of dopant Fe is 10 times lower than that of Mo, the synergy between the two phases promotes the HER performance of iron-molybdenum sulfides.

引用

页数：7

共 72 条

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