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Copper Selenide–Derived Copper Oxide Nanoplates as a Durable and Efficient Electrocatalyst for Oxygen Evolution Reaction
Author(s) -
Wang Xiaoxiao,
Hou Xiyan,
Lee Husileng,
Lu Liangjie,
Wu Xiujuan,
Sun Licheng
Publication year - 2020
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202000142
Subject(s) - overpotential , oxygen evolution , copper , electrocatalyst , selenide , catalysis , oxide , materials science , copper oxide , transition metal , nanomaterials , inorganic chemistry , chemical engineering , nanotechnology , electrode , chemistry , electrochemistry , metallurgy , selenium , organic chemistry , engineering
Earth‐abundant transition metal–based nanomaterials play a signicant role in oxygen evolution reaction (OER). Among them, copper has attracted signicant attention due to its excellent electrocatalytic activity, low price, and abundance. Herein, a nanostructured copper oxide (CuO‐A) is generated in situ from a cuprous selenide (Cu 2 Se) precursor under oxygen evolution reaction conditions. The as‐prepared CuO‐A/copper foam (CF) electrode delivers a current density of 10 mA cm −2 at an overpotential of 297 mV with good stability for over 50 h in 1 m KOH solution, which is superior to most recently reported copper‐based water oxidation catalysts. The high catalytic performance of CuO‐A is mainly attributed to the improved surface area offered by the morphology reconstruction during the in situ transformation process. As a result, it paves a way to synthesize effective and stable transition metal oxide catalysts via the in situ conversion of transition metal chalcogenides for energy conversion and storage applications.