过电位
材料科学
析氧
石墨烯
电催化剂
过渡金属
分解水
分子
化学工程
纳米结构
纳米技术
基质(水族馆)
电化学
催化作用
电极
物理化学
有机化学
化学
工程类
地质学
海洋学
光催化
作者
Jing Zhang,Wenjie Jiang,Shuai Niu,Hantang Zhang,Jie Liu,Haiyang Li,Gui‐Fang Huang,Lang Jiang,Wei‐Qing Huang,Jin‐Song Hu,Wenping Hu
标识
DOI:10.1002/adma.201906015
摘要
Abstract Developing low‐cost, highly efficient, and durable electrocatalysts for oxygen evolution reaction (OER) is essential for the practical application of electrochemical water splitting. Herein, it is discovered that organic small molecule (hexabromobenzene, HBB) can activate commercial transition metal (Ni, Fe, and NiFe) foam by directly evolving metal nanomeshes embedded in graphene‐like films (M‐NM@G) through a facile Br‐induced solid‐phase migration process. Systematic investigations indicate that HBB can conformally generate graphene‐like network on bulk metal foam substrate via the cleavage of CBr bonds and the formation of CC linkage. Simultaneously, the cleaved CBr fragments can efficiently extract metal atoms from bulk substrate, in situ producing transition metal nanomeshes embedded in the graphene‐like films. As a result, such functional nanostructure can serve as an efficient OER electrocatalyst with a low overpotential and excellent long‐term stability. Specifically, the overpotential at 100 mA cm −2 is only 208 mV for NiFe‐NM@G, ranking the top‐tier OER electrocatalysts. This work demonstrates an intriguing general strategy for directly transforming bulk transition metals into nanostructured functional electrocatalysts via the interaction with organic small molecules, opening up opportunities for bridging the application of organic small molecules in energy technologies.
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