摘要
氧还原(ORR)可分为4e-体系和2e-体系.在燃料电池中,O2经过4^-e体系直接生成H2O,经过2^-e过程直接产生H2O2,H2O2可以产生电能,是替代石油或氢气的理想能源载体,而且H2O2在实际生活生产中也具有广泛应用.但是,燃料电池中2^-e体系氧还原反应非常缓慢,故开发高效、低成本的氧还原催化剂已成为近年来的研究热点.本文主要综述了近些年氧还原2^-e体系电催化剂的研究进展,并对它们的选择性、活性和稳定性进行深入探讨.最后,对电化学制备H2O2的最新进展作了简要总结,并对今后的研究挑战作了展望.
Oxygen reduction(ORR) can be divided into 4^-e system and 2^-e system. In fuel cells, O2 passes through 4^-e system to produce H2O directly. Direct production of hydrogen peroxide through 2 e- process. Hydrogen peroxide can generate electricity, which is an ideal energy carrier to replace petroleum or hydrogen. Moreover, hydrogen peroxide is also widely used in practical life and production.However, the oxygen reduction reaction of 2^-e system in fuel cells is very slow, thus the development of efficient and low-cost oxygen reduction catalysts has become a research hotspot in recent years. In this paper, the recent progress of 2^-e system electrocatalysts for oxygen reduction is reviewed, and their selectivity, activity and stability are discussed in depth. Finally, the latest progress in electrochemical preparation of hydrogen peroxide is briefly summarized, and the future research challenges are prospected.
作者
杨雨露
王雅
楚意月
史晓雨
郝召民
董青松
YANG Yulu;WANG Ya;CHU Yiyue;SHI XiaoYu;HAO Zhaomin DONG Qingsong(College of Chernistry and Chemical Engineering,Henan University,Kaifeng 475004,Henan,China)
出处
《化学研究》
CAS
2019年第6期640-645,共6页
Chemical Research
基金
国家自然科学基金(21702045).
关键词
电化学
氧还原
氧还原催化剂
H2O2
2e^-
electrochemical
oxygen reduction
oxygen reduction catalyst
hydrogen peroxide
two-electron
