Co and Pt Dual-Single-Atoms with Oxygen-Coordinated Co-O-Pt Dimer Sites for Ultrahigh Photocatalytic Hydrogen Evolution Efficiency

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - 33(2021), 13 vom: 07. Apr., Seite e2003327
1. Verfasser:	Wang, Cong (VerfasserIn)
Weitere Verfasser:	Wang, Kaiwen, Feng, Yibo, Li, Chong, Zhou, Xiaoyuan, Gan, Liyong, Feng, Yajie, Zhou, Hanjun, Zhang, Bin, Qu, Xianlin, Li, Hui, Li, Jieyuan, Li, Ang, Sun, Yiyang, Zhang, Shengbai, Yang, Guo, Guo, Yizhong, Yang, Shize, Zhou, Tianhua, Dong, Fan, Zheng, Kun, Wang, Lihua, Huang, Jun, Zhang, Ze, Han, Xiaodong
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2021
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article TiO2 photocatalysts dual single-atoms hydrogen evolution reaction oxygen-coordination single-atomic-site catalysts

Beschreibung
Zusammenfassung:	© 2021 Wiley-VCH GmbH. The platinum single-atom-catalyst is verified as a very successful route to approach the size limit of Pt catalysts, while how to further improve the catalytic efficiency of Pt is a fundamental scientific question and is challenging because the size issue of Pt is approached at the ultimate ceiling as single atoms. Here, a new route for further improving Pt catalytic efficiency by cobalt (Co) and Pt dual-single-atoms on titanium dioxide (TiO2 ) surfaces, which contains a fraction of nonbonding oxygen-coordinated Co-O-Pt dimers, is reported. These Co-Pt dimer sites originate from loading high-density Pt single-atoms and Co single-atoms, with them anchoring randomly on the TiO2 substrate. This dual-single-atom catalyst yields 13.4% dimer sites and exhibits an ultrahigh and stable photocatalytic activity with a rate of 43.467 mmol g-1 h-1 and external quantum efficiency of ≈83.4% at 365 nm. This activity far exceeds those of equal amounts of Pt single-atom and typical Pt clustered catalysts by 1.92 and 1.64 times, respectively. The enhancement mechanism relies on the oxygen-coordinated Co-O-Pt dimer coupling, which can mutually optimize the electronic states of both Pt and Co sites to weaken H* binding. Namely, the "mute" Co single-atom is activated by Pt single-atom and the activity of the Pt atom is further enhanced through the dimer interaction. This strategy of nonbonding interactive dimer sites and the oxygen-mediated catalytic mechanisms provide emerging rich opportunities for greatly improving the catalytic efficiency and developing novel catalysts with creating new electronic states
Beschreibung:	Date Revised 02.04.2021 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	1521-4095
DOI:	10.1002/adma.202003327