Highly Efficient Solar-driven Dry Reforming of Methane on a Rh/LaNiO 3 Catalyst through a Light-induced Metal-to-metal Charge Transfer Process.

As an energy-saving and green method, solar-driven dry reforming of methane (DRM) is expected to introduce new activation processes and prevent sintering and coking of the catalysts. However, it still lacks an efficient way to the coordinate regulation of activation of reactants and lattice oxygen migration. In this work, Rh/LaNiO 3 is designed as a highly efficient photothermal catalyst for solar-driven DRM, which performs production rates of 452.3 mmol h -1 g Rh -1 for H 2 and 527.6 mmol h -1 g Rh -1 for CO 2 under a light intensity of 1.5 W cm -2 , with an excellent stability. Moreover, a remarkable light-to-chemical energy efficiency (LTCEE) of 10.72% is achieved under a light intensity of 3.5 W cm -2 . The characterizations of surface electronic and chemical properties and theoretical analysis demonstrate that strong adsorption for CH 4 and CO 2 , light-induced metal-to-metal charge transfer (MMCT) process and high oxygen mobility together bring Rh/LaNiO 3 excellent performance for solar-driven DRM. This article is protected by copyright. All rights reserved.