Light-driven efficient dry reforming of methane over Pt/La2O3 with long-term durability†
de
and
Hongpeng
Jia
*abce
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/La2O3 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/La2O3. 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.
- This article is part of the themed collection: Journal of Materials Chemistry A HOT Papers
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