塔菲尔方程
过电位
材料科学
析氧
异质结
肖特基势垒
催化作用
化学工程
纳米材料
肖特基二极管
分解水
纳米技术
光电子学
电极
光催化
物理化学
电化学
工程类
二极管
化学
生物化学
作者
Yawei Zhang,Lisha You,Qinglin Liu,Yinle Li,Tiesheng Li,Ziqian Xue
标识
DOI:10.1021/acsami.0c20204
摘要
The construction of a heterojunction is an important strategy to develop efficient electrocatalysts. However, the precise design and preparation of the heterojunction with desirable catalytic performance remain a challenge. Herein, a hierarchical Ni2P/FeOOH Schottky junction supported on nickel foam was prepared by electrodeposition of FeOOH on the surface of Ni2P. The electrocatalytic activity of the Ni2P/FeOOH Schottky junction can be remarkably improved, owing to the unique hierarchical architecture and strong electron interaction in the Ni2P/FeOOH Schottky junction. As-prepared Ni2P/FeOOH exhibits excellent electrocatalytic activity for an oxygen evolution reaction (OER) with an ultralow overpotential of 246 mV to reach 100 mA cm–2 and a small Tafel slope of 62.8 mV dec–1. This work provides not only a new method for the design of hierarchical nanomaterials but also an efficient strategy to design efficient OER electrocatalysts by constructing hierarchical heterojunctions.
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