环境友好型
铬
电催化剂
煅烧
危险废物
废物管理
材料科学
催化作用
背景(考古学)
析氧
化学工程
环境科学
化学
电化学
冶金
工程类
有机化学
电极
物理化学
生物
生态学
古生物学
作者
Qiangqiang Lu,Qingxin Han,Xuechuan Wang,Chao Wei,Xiaoyu Guan,Chun Qu,Ji Li
标识
DOI:10.1016/j.jenvman.2023.119020
摘要
Economically sustainable development requires more viable waste recycling solutions. In this context, we address the problem of utilizing chromium-containing sludge, a prevalent and environmentally hazardous waste. Meanwhile, sustainable energy development must develop ecology-friendly and low-cost electrocatalysts for the oxygen evolution reaction (OER) in alkaline media. Herein, we report an ultra-low-cost electrocatalyst from chromium-containing sludge. The optimum preparation conditions are determined by optimizing the calcination temperature and the loading of nickel acetylacetonate. The optimized catalyst delivers excellent stability and outstanding OER activity with overpotentials of 320 mV at 10 mA cm-2 in alkaline media. Density functional theory calculations reveal that the energy barrier of OER is decreased because of the catalyst's heterogeneous structure arrangement and confirm the influence of chromium on performance improvement. The concept of "turning waste into treasure" stimulates the search for methods to process Cr-containing waste and produce low-cost, high-performance electrocatalysts.
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