摘要
可再生电力驱动的催化水裂解为生产氢和氧分子提供了一种很有前途的策略,但其效率受到阳极析氧反应动力学缓慢的严重限制。非晶态催化剂表现出良好的析氧活性,非晶结构的短程有序结构能增加活性位点的数量,从而提高了非晶催化剂在析氧反应中的电催化活性,但对其潜在来源知之甚少,这阻碍了高性能非晶态析氧反应催化剂的发展。在此,我们通过一种简单手段来制备用于析氧反应的无定形钴-铁合金催化剂,同时研究了不同金属比例对非晶催化剂性能的影响。优化制备的Co_(0.25)Fe_(0.75)催化剂在1.0 M KOH溶液中20 mA·cm^(-2)电流密度下的析氧过电位仅为314 mV,而且具有20 h的长期电解稳定性。
Renewable electricity-driven catalytic water splitting offers a promising strategy for the production of hydrogen molecules,but its efficiency is severely limited by the slow kinetics of the anodic oxygen evolution reaction.Amorphous catalysts show good oxygen evolution activity,and the short-range ordered structure of the amorphous structure can increase the number of active sites,thereby improving the electrocatalytic activity of amorphous catalysts in oxygen evolution reaction,but its potential source is known.Very few,which hinders the development of high-performance amorphous oxygen evolution reaction catalysts.Here,we prepared amorphous cobalt-iron alloy catalysts for oxygen evolution reaction by a mild approach,and simultaneously investigated the effect of different metal ratios on the performance of amorphous catalysts.The optimally prepared Co_(0.25)Fe_(0.75) catalyst exhibits an oxygen evolution overpotential of only 314 mV at a current density of 20 mA·cm^(-2) in 1.0 M KOH solution,and has a long-term electrolytic stability of 20 h.
作者
兰宏宇
Lan Hongyu(College of Chemistry and Chemical Engineering,Hubei University,Wuhan 430062,China)
出处
《广东化工》
CAS
2022年第22期46-49,共4页
Guangdong Chemical Industry
关键词
合金
非晶
析氧反应
alloy
amorphous
oxygen evolution reaction
