磷化物
塔菲尔方程
过电位
电催化剂
析氧
材料科学
锂(药物)
化学工程
纳米结构
过渡金属
催化作用
储能
纳米技术
金属
电化学
化学
冶金
电极
物理化学
功率(物理)
生物化学
内分泌学
工程类
物理
医学
量子力学
作者
Xiangjian Liu,Lin Zhou,Liang Huang,Lulu Chen,Ling Long,Siyu Wang,Xiaolong Xu,Minchao Liu,Wenxiu Yang,Jianbo Jia
标识
DOI:10.1016/j.electacta.2019.06.136
摘要
Transition metal phosphides have attracted much research interests in energy conversion and storage as a result of their enhanced physiochemical properties. Here, we report the successful synthesis of tri-metal (CoNiFe) based porous hierarchical hollow sphere-like phosphides through a simple solvothermal process and a low temperature phosphorization process. The special nanostructure endows the phosphide electrocatalyst a rough surface, which in turn provides much more active sites and defects to enhance the performances in oxygen evolution reaction (OER) and lithium storage. The synergetic effects among the metal elements and combination with the advantages of metal phosphides contribute mostly to the enhanced performances. The optimized electrocatalyst exhibits a low overpotential of 279 mV at 10 mA cm−2 and a Tafel slope of 62.9 mV dec−1 for OER. Benefiting from the structural and compositional advantages of the phosphide catalyst, it also shows good stability and high capacity in lithium storage.
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