电解水钌基酸性析氧催化剂的研究进展

RESEARCH PROGRESS OF RUTHENIUM-BASED ACIDICOXYGEN EVOLUTION CATALYST IN WATER ELECTROLYSIS

质子交换膜电解水(PEMWE)可以与可再生能源产生的绿电耦合,高效制备高纯度绿氢。其中,阳极的酸性析氧反应(OER)由于其缓慢的动力学过程、高氧化性和腐蚀性,仍是影响整体电解水效率的瓶颈。目前,阳极催化剂极度依赖资源有限且价格高昂的铱基催化剂,极大限制了质子交换膜(PEM)电解槽的大规模商业化应用。钌作为最廉价的铂族金属,具有优良的酸性析氧活性,但稳定性仍然需要进一步研究,因而迫切需要开发新型的钌基酸性析氧催化剂。首先,综述了酸性OER的微观反应机理及其稳定性分析;然后,从组成结构-活性-稳定性等方面重点介绍了该领域的研究进展;最后,总结了该领域在未来的研究中需要重点关注的一些重要问题,以促进对钌基酸性析氧催化剂的进一步研究。

The proton exchange membrane water electrolysis(PEMEW)can be coupled with green electricity generated from renewable energy to efficiently produce high-purity green hydrogen.Among them,the oxygen evolution reaction(OER)at the anode is still the bottleneck that affects the overall water electrolysis efficiency because of its slow kinetic process,high oxidation and corrosion.At present,the anode is extremely dependent on the limited and expensive iridium-based catalysts,which greatly limits the large-scale commercial application of proton exchange membrane(PEM)-based electrolyzers.Ruthenium,as the cheapest platinum group metal,has excellent acidic oxygen evolution activity,but its stability still needs further study,so it is urgent to develop some new ruthenium-based acidic oxygen evolution catalysts.Firstly,the reaction mechanism and stability analysis of acidic OER were reviewed.Then,the research progress in this field was mainly introduced from the aspects of composition structure-activity-stability.Finally,some important problems in future research were summarized to promote further research on ruthenium-based acidic oxygen evolution catalysts.