电催化剂
析氧
塔菲尔方程
过电位
高分辨率透射电子显微镜
贵金属
材料科学
煅烧
化学工程
电解
分解水
X射线光电子能谱
电解水
催化作用
电解质
透射电子显微镜
化学
纳米技术
冶金
金属
电极
电化学
光催化
物理化学
工程类
生物化学
作者
Soumen Saha,Ashok K. Ganguli
标识
DOI:10.1002/slct.201601243
摘要
Abstract The development of efficient and durable noble metal‐free electrocatalyst for oxygen evolution reaction (OER) is highly desired in polymer electrolyte membrane (PEM) based water electrolysis and metal‐ air batteries but still remains a challenge. In this paper, we employ co‐precipitation method to prepare layered double hydroxides followed by calcination to synthesize nanoalloy catalyst, which was further characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM/EDS), high resolution transmission electron microscopy (HRTEM)and x‐ray photoelectron spectroscopy. As a novel OER electrocatalyst, the FeCoNi alloy catalyst shows remarkable OER activity enhancement with an overpotential of only 400 mV and a low Tafel slope 72 mV dec −1 . This work offers a unique paradigm for the synthesis of competitive electrocatalyst for OER with excellent durability under alkaline condition.
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