The hydrogen evolution reaction(HER)is a promising way to produce hydrogen,and the use of non-precious metals with an excellent electrochemical performance is vital for this.Carbon-based transition metal catalysts hav...The hydrogen evolution reaction(HER)is a promising way to produce hydrogen,and the use of non-precious metals with an excellent electrochemical performance is vital for this.Carbon-based transition metal catalysts have high activity and stability,which are important in reducing the cost of hydrogen production and promoting the development of the hydrogen production industry.However,there is a lack of discussion regarding the effect of carbon components on the performance of these electrocatalysts.This review of the literature discusses the choice of the carbon components in these catalysts and their impact on catalytic performance,including electronic structure control by heteroatom doping,morphology adjustment,and the influence of self-supporting materials.It not only analyzes the progress in HER,but also provides guidance for synthesizing high-performance carbon-based transition metal catalysts.展开更多
文摘介绍了一种采用环保无毒的多巴胺(PDA)作为碳源,掺入过渡金属Co后,得到Co-PDA,再用熔盐煅烧法提取出催化剂的方法,并制备得到一种具有更高电池催化效率的碳基非贵金属催化剂。发现在多巴胺与钴离子为4∶1、加入10g盐(5.5g KCl和4.5g LiCl);煅烧时间3h;煅烧温度900℃时制备出的Co与碳材料复合的催化剂具有最高的半波电位(0.8228V vs RHE)和较高的极限电流密度(-5.3763mA/cm^(2)),更加接近商业Pt-C催化剂的半波电位。通过对催化剂进行XRD测试分析,发现熔盐煅烧后的产物主要是碳材料和单质钴两种物质。熔盐煅烧法制备出的碳材料具有更大的比表面积和丰富的孔洞结构,能够在催化剂合成过程中为物质传输提供有利的运输环境,使得钴能够较好固定在介孔碳表面,进而提供较多活性位点,保证催化剂具有良好的电催化活性和稳定性。
文摘The hydrogen evolution reaction(HER)is a promising way to produce hydrogen,and the use of non-precious metals with an excellent electrochemical performance is vital for this.Carbon-based transition metal catalysts have high activity and stability,which are important in reducing the cost of hydrogen production and promoting the development of the hydrogen production industry.However,there is a lack of discussion regarding the effect of carbon components on the performance of these electrocatalysts.This review of the literature discusses the choice of the carbon components in these catalysts and their impact on catalytic performance,including electronic structure control by heteroatom doping,morphology adjustment,and the influence of self-supporting materials.It not only analyzes the progress in HER,but also provides guidance for synthesizing high-performance carbon-based transition metal catalysts.