高效NiFe基/泡沫镍电极在析氧反应中的研究进展

Review of Highly Efficient NiFe-based Ni Foam Electrode for Oxygen Evolution Reactions

由可再生能源发电驱动电解水是目前最具前景的技术之一,被认为是通向氢经济的最佳途径。整个电解水的过程可以分为两个半电池反应,即析氢反应(HER)和析氧反应(OER)。由于OER低效率且复杂的4电子转移过程,严重影响了电化学水分解的实际应用。近年来,NiFe基催化材料对OER的优异催化性能引起了人们的关注,尤其是3D NiFe基/泡沫镍材料系列催化剂克服了传统粉末催化剂高阻抗和低稳定性的缺点,使得电催化性能大幅提高。本文总结了在镍泡沫上的NiFe基材料对OER催化性能的最新进展,并提出了未来发展前景。

Electrochemical splitting water by using renewable energy to produce hydrogen has attracted a great deal of attention,which is the best way to hydrogen economy.Water splitting is an advanced energy conversion technology which consists of oxygen evo⁃lution reaction(OER)and hydrogen evlution reaction(HER).During this process,the water electrolysis is severely constrained by the kinetically sluggish oxygen evolution reaction(OER),which involves four proton-coupled electron transfers and oxygen-oxygen bond formation processes.Recently,NiFe-based materials have attracted great attention becase of their excellent catalytic properties for OER.Nevertheless,their conductivity and electrochemical stability do not reach ideal levels at high current density because high im⁃pedance and low stabitily lead to ineffective water splitting.In the review,we summarized the latest progress of NiFe-based materials on nickel foam for OER and provided their development prospect.