Reversible adapting layer produces robust single-crystal electrocatalyst for oxygen evolution

Nature Communications
Ching-Wei TungHao Ming Chen

Abstract

Electrochemically converting water into oxygen/hydrogen gas is ideal for high-density renewable energy storage in which robust electrocatalysts for efficient oxygen evolution play crucial roles. To date, however, electrocatalysts with long-term stability have remained elusive. Here we report that single-crystal Co3O4 nanocube underlay with a thin CoO layer results in a high-performance and high-stability electrocatalyst in oxygen evolution reaction. An in situ X-ray diffraction method is developed to observe a strong correlation between the initialization of the oxygen evolution and the formation of active metal oxyhydroxide phase. The lattice of skin layer adapts to the structure of the active phase, which enables a reversible facile structural change that facilitates the chemical reactions without breaking the scaffold of the electrocatalysts. The single-crystal nanocube electrode exhibits stable, continuous oxygen evolution for >1,000 h. This robust stability is attributed to the complementary nature of defect-free single-crystal electrocatalyst and the reversible adapting layer.

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Citations

Dec 29, 2015·Journal of the American Chemical Society·Hsin-Yi WangBin Liu
Jul 22, 2016·Journal of the American Chemical Society·Hua Bing TaoBin Liu
Mar 18, 2017·Chemical Reviews·Chaoliang TanHua Zhang
Jan 14, 2017·Chemical Society Reviews·Nian-Tzu SuenHao Ming Chen
Mar 2, 2017·Chemical Society Reviews·Dowon BaeIb Chorkendorff
Feb 20, 2018·Small·Sung-Fu HungHao Ming Chen
Mar 7, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Chia-Jui ChangHao Ming Chen
Mar 7, 2020·Chemical Society Reviews·Jiajia SongZhichuan J Xu
Jun 27, 2020·Advanced Materials·Song Lin ZhangXiong Wen David Lou
Jul 15, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Anurupa Maiti
Jul 11, 2020·Beilstein Journal of Nanotechnology·Stefanie SchlichtJulien Bachmann

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Methods Mentioned

BETA
X-ray
electron diffraction

Software Mentioned

GSAS

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