Enhanced hydrogen evolution reaction on hybrids of cobalt phosphide and molybdenum phosphide | Zendy

Si-Ling Fang | Zendy; TsuChin Chou | Zendy; Satyanarayana Samireddi | Zendy; KueiHsien Chen | Zendy; LiChyong Chen | Zendy; WeiFu Chen | Zendy

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Enhanced hydrogen evolution reaction on hybrids of cobalt phosphide and molybdenum phosphide

Author(s) -

Si-Ling Fang,

TsuChin Chou,

Satyanarayana Samireddi,

KueiHsien Chen,

LiChyong Chen,

WeiFu Chen

Publication year - 2017

Publication title -

royal society open science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.84

H-Index - 51

ISSN - 2054-5703

DOI - 10.1098/rsos.161016

Subject(s) - phosphide , tafel equation , catalysis , hydrogen production , molybdenum , cobalt , materials science , ternary operation , hydrogen , platinum , electrochemistry , inorganic chemistry , chemical engineering , chemistry , metallurgy , electrode , biochemistry , organic chemistry , computer science , engineering , programming language

Production of hydrogen from water electrolysis has stimulated the search of sustainable electrocatalysts as possible alternatives. Recently, cobalt phosphide (CoP) and molybdenum phosphide (MoP) received great attention owing to their superior catalytic activity and stability towards the hydrogen evolution reaction (HER) which rivals platinum catalysts. In this study, we synthesize and study a series of catalysts based on hybrids of CoP and MoP with different Co/Mo ratio. The HER activity shows a volcano shape and reaches a maximum for Co/Mo = 1. Tafel analysis indicates a change in the dominating step of Volmer–Hyrovský mechanism. Interestingly, X-ray diffraction patterns confirmed a major ternary interstitial hexagonal CoMoP 2 crystal phase is formed which enhances the electrochemical activity.

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