摘要
电催化水裂解是一种制备清洁氢气的潜在方法,寻找一种催化剂提高电催化阴极析氢反应(HER)速率是研究热点。通过制备球形碳掺杂钴基催化剂并对其进行硫化或磷化处理以提高其催化性能。三种产物中,CoP/C催化性能最优。在酸性和碱性条件下,电流密度为10 mA·cm^(-2)时的析氢过电位分别为154 mV和89 mV,并且稳定性优良。该催化剂被进一步用作空气阴极,以构建用于能量转换的锌-空气电池。该电池的开路电压为1.35 V,维持50 h没有衰减,并且通过27 h的长期循环试验评估了其可充电性,电压间隙为1.2 V。这项工作为设计球形非贵金属多组分HER催化剂提供了新的策略。
Electrochemical water slitting is considered as a highly efficient and potential clean hydrogen production technology.It is the direction to find a kind of catalyst to improve the efficiency of hydrogen evolution reaction.Spherical cobalt sulfide and cobalt phosphide doped with activated carbon were prepared and their catalytic properties were studied.The product CoP/C has excellent stability and the over-potential of hydrogen evolution is 154 mv and 89 mv at current density of 10mA·cm^(-2)under acidic or alkaline conditions.This catalyst was further used as an air cathode to construct the Zn-air battery for energy conversion.The battery has an open-circuit voltage of 1.35 V for 50 hours without attenuation and the excellent rechargeability was further evaluated by a 27 h long-term cycling test without deterioration for the voltage gap.This work provides a new strategy for designing spherical non-noble metal multi-component HER catalysts.
作者
冯云晓
陈昌东
徐伏
李艳岭
杨潘婷
腊明
FENG Yun-xiao;CHENG Chang-dong;XU Fu;LI Yan-ling;YANG Pan-ting;LA Ming(Ping ding shan University,Chemical and Environmental Engineering Institute,Pingdingshan 467000,China)
出处
《化学研究与应用》
CAS
CSCD
北大核心
2022年第6期1423-1428,共6页
Chemical Research and Application
基金
国家自然科学基金项目(U2004193)资助
平顶山学院国基培育基金项目(PXY-PYJJ-202102)资助。
