An Efficient Turing‐Type Ag2Se‐CoSe2 Multi‐Interfacial Oxygen‐Evolving Electrocatalyst

Although the Turing structures, or stationary reaction‐diffusion patterns, have received increasing attention in biology and chemistry, making such unusual patterns on inorganic solids is fundamentally challenging. We report a simple cation exchange approach to produce Turing‐type Ag2Se on CoSe2 nan...

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Published inAngewandte Chemie International Edition Vol. 60; no. 12; pp. 6553 - 6560
Main Authors Zhang, Xiao‐Long, Yang, Peng‐Peng, Zheng, Ya‐Rong, Duan, Yu, Hu, Shao‐Jin, Ma, Tao, Gao, Fei‐Yue, Niu, Zhuang‐Zhuang, Wu, Zhi‐Zheng, Qin, Shuai, Chi, Li‐Ping, Yu, Xingxing, Wu, Rui, Gu, Chao, Wang, Cheng‐Ming, Zheng, Xu‐Sheng, Zheng, Xiao, Zhu, Jun‐Fa, Gao, Min‐Rui
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 15.03.2021
EditionInternational ed. in English
Subjects
Cation exchange
Cation exchanging
Computer applications
Electrocatalysts
Electrochemistry
Electrolytes
Energy efficiency
Interfaces
Intermediates
multi-interface
Oxygen
oxygen evolution
Oxygen evolution reactions
reaction-diffusion model
Turing structure
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Summary:Although the Turing structures, or stationary reaction‐diffusion patterns, have received increasing attention in biology and chemistry, making such unusual patterns on inorganic solids is fundamentally challenging. We report a simple cation exchange approach to produce Turing‐type Ag2Se on CoSe2 nanobelts relied on diffusion‐driven instability. The resultant Turing‐type Ag2Se‐CoSe2 material is highly effective to catalyze the oxygen evolution reaction (OER) in alkaline electrolytes with an 84.5 % anodic energy efficiency. Electrochemical measurements show that the intrinsic OER activity correlates linearly with the length of Ag2Se‐CoSe2 interfaces, determining that such Turing‐type interfaces are more active sites for OER. Combing X‐ray absorption and computational simulations, we ascribe the excellent OER performance to the optimized adsorption energies for critical oxygen‐containing intermediates at the unconventional interfaces. A novel Turing‐type Ag2Se‐CoSe2 structure has been synthesized, which possesses rich Ag2Se‐CoSe2 interfaces, exhibiting a 221 mV overpotential at a current density of 10 mA cm−2 in 0.1 M KOH electrolyte with a high anodic energy efficiency of 84.5 %.
Bibliography:https://doi.org/10.21203/rs.3.rs‐39890/v1
These authors contributed equally to this work.
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A previous version of this manuscript has been deposited on a preprint server
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ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202017016