XAFS技术在单原子电催化中的应用

Application of XAFS Technique in Single-atom Electrocatalysis

X射线吸收精细谱学(XAFS)技术是从20世纪80年代开始逐渐发展起来的一种材料表征技术,具有对中心吸收原子的局域结构和化学环境敏感的特征,非常适合表征单原子催化剂.本文从XAFS技术的原理和特点出发,深入探讨了该技术在电催化水分解、燃料电池阴极反应和二氧化碳电化学还原等多个单原子催化应用场景下的独特作用,并展望了XAFS技术在单原子电催化领域的未来发展与应用前景,以期为更深入明确的单原子催化剂结构表征和电催化机理描述提供指导.

X-Ray absorption fine spectroscopy(XAFS)is a material characterization technique developed since1980s.Because of its sensitivity to the local structure and chemical environment of central absorption atoms,it is very suitable for the characterization of single-atom catalysts.Basing on the principles and features of XAFS technique,this review deeply discussed the unique role of XAFS technology in several application scenarios involving single-atom catalysts,such as electrocatalytic water splitting,fuel cell cathode reaction and carbon dioxide electrochemical reduction.What’s more,this review predicted the future application prospects of XAFS technology in the field of single-atom electrocatalysis,expecting to give a hint to further and more specific characterization towards the structure and electrocatalytic mechanism of single-atom catalysts.