纳米结构
氢氧化物
析氧
材料科学
对偶(语法数字)
氧气
作文(语言)
氧还原
化学工程
双功能
电化学
分解水
塔菲尔方程
热液循环
纳米片
层状双氢氧化物
纳米颗粒
电极
纳米技术
化学
有机化学
工程类
物理化学
艺术
哲学
文学类
语言学
作者
Shanfu Sun,Chade Lv,Weizhao Hong,Xin Zhou,Fugui Wu,Gang Chen
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2018-12-07
卷期号:2 (1): 312-319
被引量:38
标识
DOI:10.1021/acsaem.8b01318
摘要
NiCo-layered double hydroxides (LDHs) have recently emerged as potential oxygen evolution reaction (OER) catalysts in alkaline solutions. However, their preferred active sites have been ill-defined until now. In this work, hierarchical hollow nanopolyhedra assembled by NiCo-LDH nanosheets with adjustable composition and nanostructure are prepared via a facile self-templated strategy. DFT calculations indicate that Co3+ hollow sites are the preferred adsorption and active sites. The resultant hierarchical NiCo-LDH hollow nanopolyhedra realize superior OER activity by optimizing the composition of NiCo-LDH, which achieves a 10 mA cm–2 current density at an overpotential of 314 mV. This work not only presents deeper insights into the intrinsic OER electrocatalytic activity for NiCo-LDH but also elucidates on the further optimization of the OER properties of other bimetallic electrocatalysts.
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