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Atomic Layer Deposition of NiO on Self‐Supported Co 3 O 4 Nanoneedle Array for Electrocatalytic Methanol Oxidation Reaction
Author(s) -
Cheng Jia,
Song Yanyan,
Sun Mengxiao,
Sun Jiankun,
Zhang Lixue
Publication year - 2021
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.202100112
Subject(s) - non blocking i/o , nanoneedle , catalysis , atomic layer deposition , methanol , materials science , chemical engineering , transition metal , oxide , electrocatalyst , nickel oxide , layer (electronics) , deposition (geology) , nickel , inorganic chemistry , electrode , nanotechnology , chemistry , nanostructure , electrochemistry , metallurgy , organic chemistry , paleontology , sediment , engineering , biology
Developing efficient transition metal oxide catalysts is still challenging for direct methanol fuel cells. Herein, an atomic layer deposition method to prepare NiO on a self‐supported Co 3 O 4 nanoneedle array grown on a porous nickel foam substrate (NiO–Co 3 O 4 NA@NF) as the electrode for the methanol oxidation reaction (MOR) is reported. The synergistic effect between the NiO and Co 3 O 4 components as well as the specific 3D nanoarray structure can endow the prepared NiO–Co 3 O 4 NA@NF with a very promising MOR catalytic activity. As a result, the NiO–Co 3 O 4 NA@NF catalyst shows a low onset potential (1.27 V vs reversible hydrogen electrode [RHE]), a high current density (173 mA cm −2 @1.524 V vs RHE), and good stability in MOR. This work demonstrates the feasibility of the atomic layer deposition strategy in fabricating complex oxides‐based high‐performance electrocatalysts.