Pulsed laser induced plasma and thermal effects on molybdenum carbide for dry reforming of methane

Yue Li, Xingwu Liu, Tong Wu, Xiangzhou Zhang, Hecheng Han, Xiaoyu Liu, Yuke Chen, Zhenfei Tang, Zhen Liu, Yuhai Zhang, Hong Liu, Lili Zhao (), Ding Ma () and Weijia Zhou ()
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Yue Li: University of Jinan
Xingwu Liu: Peking University
Tong Wu: University of Jinan
Xiangzhou Zhang: University of Jinan
Hecheng Han: Shandong University
Xiaoyu Liu: Shandong University
Yuke Chen: University of Jinan
Zhenfei Tang: University of Jinan
Zhen Liu: University of Jinan
Yuhai Zhang: University of Jinan
Hong Liu: University of Jinan
Lili Zhao: University of Jinan
Ding Ma: Peking University
Weijia Zhou: University of Jinan

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Dry reforming of methane (DRM) is a highly endothermic process, with its development hindered by the harsh thermocatalytic conditions required. We propose an innovative DRM approach utilizing a 16 W pulsed laser in combination with a cost-effective Mo2C catalyst, enabling DRM under milder conditions. The pulsed laser serves a dual function by inducing localized high temperatures and generating *CH plasma on the Mo2C surface. This activates CH4 and CO2, significantly accelerating the DRM reaction. Notably, the laser directly generates *CH plasma from CH4 through thermionic emission and cascade ionization, bypassing the traditional step-by-step dehydrogenation process and eliminating the rate-limiting step of methane cracking. This method maintains a carbon-oxygen balanced environment, thus preventing the deactivation of the Mo2C catalyst due to CO2 oxidation. The laser-catalytic DRM achieves high yields of H2 (14300.8 mmol h−1 g−1) and CO (14949.9 mmol h−1 g−1) with satisfactory energy efficiency (0.98 mmol kJ−1), providing a promising alternative for high-energy-consuming catalytic systems.

Date: 2024
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DOI: 10.1038/s41467-024-49771-3

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