尿素
乙醇
镍
化学
接口(物质)
化学工程
业务
无机化学
生物化学
有机化学
工程类
分子
吉布斯等温线
作者
Xuan Zhang,Guiling Wang,Qing Yan,Ruiqin Gao,Jing Zhao,Zichen Song,Kai Zhu,Dianxue Cao,Jiaxin Yao,Lingwei Zheng,Guiling Wang
标识
DOI:10.1016/j.cej.2024.150397
摘要
Design and fabrication of high-efficiency nickel-rich electrocatalytic materials for sluggish oxygen evolution reaction (OER) remains a tremendous challenge. Modulating internal electronic state and accelerating charge transfer are two of vital means to optimizing electrocatalysts. In this work, nanoparticles-rich Fe-(CeS2/Ni3S2) hybrid material with abundant heterointerfaces and sulfur-defects are facilely synthesized. The strategy of iron dopant is conducive to induce more sulfur defects. The cerium species can modulate the internal electronic state and stabilize some of the surface sulphide against self-oxidation during OER process. This self-supported heterogeneous material requires overpotentials of 254 and 372 mV to reach the current densities of 100 and 500 mA cm−2 in alkaline condition. The addition of urea or ethanol to the bath solution has been demonstrated as an efficient strategy for reducing the onset potential and decreasing energy consumption, thereby confirming the feasibility of applying this approach to energy-saving hydrogen production through electrolysis wastewater splitting.
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