析氧
塔菲尔方程
过电位
催化作用
电催化剂
化学工程
材料科学
制氢
贵金属
纳米颗粒
分解水
电镀
无机化学
化学
纳米技术
电化学
物理化学
光催化
有机化学
电极
图层(电子)
工程类
作者
Jia Tang,Xueqian Lei,Shuyue Wu,Xiaohui Zhong,Hong Deng,Zhang Lin
标识
DOI:10.1002/cctc.202300458
摘要
Developing non-noble metal catalysts for the oxygen evolution reaction (OER) is one of the main challenges in the production of hydrogen energy by water splitting reaction. Herein, taking advantage of the fact that microorganisms have high element contents and metabolic activities, we used them to recycle Ni and Fe from electroplating sludge. Based on the above, we designed a highly efficient oxygen evolution catalyst ([email protected]) through the in situ synthesis of Fe-doped Ni2P nanoparticles and N, P dual-doped carbon materials coupled together. The material exhibited excellent catalytic activity, with a low overpotential of 282 mV at the current density of 10 mA cm−2 along with a fast reaction kinetics, with a small Tafel slope of 57.1 mV dec−1. This outstanding OER performance is mainly attributed to the in situ doping of Fe in Ni2P nanoparticles, resulting in a strong synergistic effect between them. Besides, the strong coupling interaction between Fe-Ni2P and Fe-NiOOH formed during the OER can adjust the electron distribution and optimize the adsorption capacity of the intermediates. This work provides a reference for the recycling of valuable Ni and Fe metals from electroplating sludge, as well as new insight into the preparation of low-cost and high-performance OER catalysts.
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