globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2020.11.009
论文题名:
Origin of the electrocatalytic oxygen evolution activity of nickel phosphides: in-situ electrochemical oxidation and Cr doping to achieve high performance
作者: Hu X.; Luo G.; Guo X.; Zhao Q.; Wang R.; Huang G.; Jiang B.; Xu C.; Pan F.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
卷: 66, 期:7
起始页码: 708
结束页码: 719
语种: 英语
中文关键词: Cation tuning ; Density functional theory (DFT) calculations ; Electrocatalyst ; Metal phosphides ; Oxygen evolution reaction ; Zinc-air batteries
英文关键词: Chromium ; Chromium compounds ; Cost effectiveness ; Density functional theory ; Electrocatalysts ; Flexible electronics ; Nickel compounds ; Oxygen evolution reaction ; Phosphorus compounds ; Zinc air batteries ; Catalytic materials ; Environmental benignity ; Large-scale applications ; Oxygen evolution activity ; Oxygen evolution reaction (oer) ; Surface engineering ; Theoretical capacity ; Transition metal phosphide ; Electrochemical oxidation
英文摘要: Zinc-air batteries (ZnABs) with high theoretical capacity and environmental benignity are the most promising candidates for next-generation electronics. However, their large-scale applications are greatly hindered due to the lack of high-efficient and cost-effective electrocatalysts. Transition metal phosphides (TMPs) have been reported as promising electrocatalysts. Notably, (Ni1−xCrx)2P (0 ≤ x ≤ 0.15) is an unstable electrocatalyst, which undergoes in-situ electrochemical oxidation during the initial oxygen evolution reaction (OER) and even in the activation cycles, and is eventually converted to Cr-NiOOH serving as the actual OER active sites with high efficiency. Density functional theory (DFT) simulations and experimental results elucidate that the OER performance could be significantly promoted by the synergistic effect of surface engineering and electronic modulations by Cr doping and in-situ phase transformation. The constructed rechargeable ZnABs could stably cycle for more than 208 h at 5 mA cm−2, while the voltage degradation is negligible. Furthermore, the developed catalytic materials could be assembled into flexible and all-solid-state ZnABs to power wearable electronics with high performance. © 2020 Science China Press
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170270
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作者单位: College of Aerospace Engineering, Chongqing University, Chongqing, 400044, China; College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China; National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing, 400044, China

Recommended Citation:
Hu X.,Luo G.,Guo X.,et al. Origin of the electrocatalytic oxygen evolution activity of nickel phosphides: in-situ electrochemical oxidation and Cr doping to achieve high performance[J]. Science Bulletin,2021-01-01,66(7)
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