Details

Autor(en) / Beteiligte

• Jiang, Zeyu
• Jing, Meizan
• Feng, Xiangbo
• Xiong, Jingchao
• He, Chi
• Douthwaite, Mark
• Zheng, Lirong
• Song, Weiyu
• Liu, Jian
• Qu, Zhiguo

Titel

Stabilizing platinum atoms on CeO2 oxygen vacancies by metal-support interaction induced interface distortion: Mechanism and application

Ist Teil von

• Applied catalysis. B, Environmental, 2020-12, Vol.278, p.119304, Article 119304

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2020

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• [Display omitted] •The stabilization mechanism of single atom Pt1-CeO2 materials was proposed.•The Pt-O-Ce interface distortion balanced the Fermi energy level and charge density.•The interface distortion promoted the adsorption capacity of O2 and methanol.•The Pt1-CeO2{100} catalyst exhibits outstanding catalytic efficiency and stability.•The methanol oxidation and surface reconstruction were revealed in an atomic-scale. Exploring thermally robust single atom catalysts (SACs) is of great significance. Here, we develop a universal strategy for stabilizing Pt atoms on the mono-oxygen vacancies of CeO2 with diverse exposed facets. The stabilization mechanism was proposed that the formed Pt-O-Ce interface will be taken into distortion spontaneously to keep thermodynamics stable through strong metal-support interactions. The highest degree of Pt-O-Ce distortion is achieved over Pt1-CeO2{100} material, which exhibits exceptional efficiency and thermal stability for oxygenated hydrocarbon removal. The enhanced adsorption capacity of O2 and methanol confirmed in the distortion interface is seen as another crucial reason for improving the stability of SACs. Methanol oxidation on Pt1-CeO2{100} obeys the L-H mechanism under relatively low temperature and then goes through to the MVK mechanism with temperature increasing. We believe that these results would bring new opportunities in the fabrication of SACs and applications of them in thermal reactions.