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Controlled Leaching Derived Synthesis of Atomically Dispersed/Clustered Gold on Mesoporous Cobalt Oxide for Enhanced Oxygen Evolution Reaction Activity
Author(s) -
Youk Sol,
Hwang Jongkook,
Lee Seonggyu,
Kim Min Su,
Lee Jinwoo
Publication year - 2019
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.201800293
Subject(s) - catalysis , overpotential , nanomaterial based catalyst , oxygen evolution , cobalt , materials science , mesoporous material , cobalt oxide , oxide , chemical engineering , leaching (pedology) , water splitting , noble metal , inorganic chemistry , nanotechnology , metal , chemistry , nanoparticle , electrochemistry , metallurgy , photocatalysis , electrode , organic chemistry , soil science , engineering , soil water , environmental science
The water splitting for hydrogen energy is largely constrained by sluggish anodic oxygen evolution reaction (OER). Cobalt oxide, one of the most promising non‐noble metal catalysts for OER, can exhibit highly enhanced catalytic OER activity when deposited on gold substrates. However, it still remains challenging to develop efficient Au/Co 3 O 4 catalysts that can maximize the catalytic activity with the minimum use of gold. Here is reported a simple leaching derived synthesis of atomically dispersed/clustered gold on mesoporous cobalt oxides as highly efficient catalysts for OER. With greatly lowered gold contents <1 wt%, the catalyst shows twice as much current density and Au normalized activity than mesoporous cobalt oxide at 400 mV overpotential. The present work provides a simple synthesis route toward atomically dispersed/clustered gold supported catalysts, which can be extended to the development of a wide variety of efficient nanocatalysts that can be designed for specific applications.