过电位
电催化剂
镍
析氧
纳米线
电化学
材料科学
分解水
催化作用
电极
化学工程
无定形固体
无机化学
纳米技术
化学
冶金
物理化学
有机化学
工程类
光催化
作者
Yuyao Ji,Min Ma,Xuqiang Ji,Xiaoli Xiong,Xuping Sun
标识
DOI:10.1007/s11705-018-1717-8
摘要
It is highly attractive but still remains a great challenge to develop an efficient electrocatalyst for oxygen evolution reaction under nearly neutral conditions. In this work, we report the transformation of Ni3S2 nanowire array on nickel foam into the amorphous nickel carbonate nanowire array on nickel foam (NiCO3/NF). The resulting NiCO3/NF shows high electrocatalytic activity towards water oxidation and affords current density of 50 mA∙cm‒2 at overpotential of 395 mV in 1.0 mol∙L‒1 KHCO3. Moreover, this NiCO3/NF is also durable with a long-term electrochemical durability of 60 h. This catalyst electrode achieves a high turnover frequency of 0.21 mol O2∙s‒1 at the overpotential of 500 mV.
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