An Efficient Turing‐Type Ag2Se‐CoSe2 Multi‐Interfacial Oxygen‐Evolving Electrocatalyst. (12th February 2021)

• Record Type: Journal Article
• 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
• Is Part Of: Angewandte Chemie. Volume 133:Number 12(2021)
• Page Start: 6627
• Page End: 6634
• Publication Date: 2021-02-12
• Subjects: energy efficiency -- multi-interface -- oxygen evolution -- reaction-diffusion model -- Turing structure; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202017016
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: 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 Ag2 Se on CoSe2 nanobelts relied on diffusion‐driven instability. The resultant Turing‐type Ag2 Se‐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 Ag2 Se‐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. Abstract : A novel Turing‐type Ag2 Se‐CoSe2 structure has been synthesized, which possesses rich Ag2 Se‐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 %.