铂单原子催化剂同步辐射X射线吸收谱的研究进展

相比于传统块体材料, 铂单原子催化剂(Pt SACs)具有接近100%的贵金属利用率、 优异的催化活性和均一的反应位点等优势, 近年来逐渐成为催化研究的前沿之一. 高度分散的Pt原子与载体之间的界面相互作用很大程度上决定了Pt SACs的物理和化学性能. 因此, 建立金属-载体相互作用与性能之间的内在关联机制, 对于单原子催化剂的优化设计至关重要. 得益于同步辐射光源高亮度、 高准直性和宽波谱的优势, X射线吸收谱技术在鉴别单原子催化剂的电子结构和局域配位方面的成果显著. 本文综合评述了Pt SACs X射线吸收谱的研究进展, 重点介绍了Pt与金属氧化物、 金属、 纳米碳和多孔有机框架等载体之间独特的相互作用， 以及其对性能的影响机制, 并对未来同步辐射新技术在Pt SACs的高分辨解析方面的前景进行了展望.

Synchrotron Radiation X-Ray Absorption Spectroscopy Research Progress on Platinum Single-atom Catalysts

As comparison with bulk materials， platinum single-atom catalysts（Pt SACs） that possess almost 100% noble-metal utilization， superior catalytic activity and homogeneous reactive sites， generally emerge as a promising frontier. The interfacial interactions between highly dispersed Pt atoms and supports largely determine their chemical and physical properties. Hence， constructing the real correlation between metal-support interactions and catalytic performances is essential to guide the optimization design of Pt SACs. Thanks to high flux， high collimation and wide-range wavelengths from synchrotron radiation light source， X-ray absorption spectroscopy（XAS） exhibits unparalleled capacity in the identification of electronic structure and local coordination of SACs. In this prospection， we aim to briefly discuss the synchrotron-radiation XAS research progress on Pt SACs. The unique interaction between Pt and multiply supports， such as metal oxides， metals， nanocarbons and porous organic frameworks， is highlighted in order to give better understanding on the influence mechanism. Ultimately， high-resolution characterizations on Pt SACs based on new synchrotron radiation techniques are prospective and recommended.