Light-driven efficient dry reforming of methane over Pt/La2O3 with long-term durability. Issue 30 (20th July 2022)

• Record Type: Journal Article
• Authors: Gao, Yanxia; Li, Qiang; Wang, Chunqi; Yan, Dongxu; Chen, Jing; Jia, Hongpeng
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 30(2022)
• Page Start: 16016
• Page End: 16028
• Publication Date: 2022-07-20
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2ta04246k
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Pt/La2 O3 exhibits highly-efficient photothermocatalytic activity and good durability during 200 h reaction for the dry reforming of methane under focused light irradiation without external heating. Abstract : The instability caused by coking and catalyst sintering during the dry reforming of methane (DRM) is a major obstacle to their commercialization. Herein, Pt/La2 O3 exhibits high yield of syngas and satisfactory durability of at least 200 h during the DRM reaction under focused light illumination without external heating, and no obvious aggregation occurs to Pt nanoparticles on Pt/La2 O3 . The H2 production rate of 1284.5 mmol gcat −1 h −1 and the selectivity of ∼0.89 in photothermocatalysis are 3.0 and 2.1 folds of those in the thermocatalysis at the same temperature (700 °C), respectively. Light-excited hot electrons and more oxygen vacancies accelerate the spontaneous desorption of H2 and the activation and dissociation of CH4 and CO2 to improve the catalytic performance, which together with the strong Pt-support interaction contributes to the reaction stability. The stable catalyst design can be extended to other harsh reactions, offering great potential for industrial applications.