Strong metal‒support interaction modulates catalytic activity of Ru nanoparticles on Gd2O3 for efficient ammonia decomposition
Xiaohua Ju,
Lin Liu,
Xiaoyan Xu,
Jiemin Wang,
Teng He,
Ping Chen
Affiliations
Xiaohua Ju
Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
Lin Liu
Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Corresponding author
Xiaoyan Xu
Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
Jiemin Wang
Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China; School of Chemistry, Dalian University of Technology, Dalian 116024, China
Teng He
Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Ping Chen
Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Summary: Exploration of efficient Ru-based catalysts is significant for advancing the production of hydrogen from ammonia decomposition, which depends predominantly on the rational regulation of the metal-support interaction of Ru-based catalysts. Herein, highly dispersed Ru nanoparticles (NPs) on Gd2O3 (Ru/Gd2O3) are developed and applied for the NH3 decomposition reaction. By varying the reduction temperature, the activity of the Ru/Gd2O3 catalyst can be remarkably improved. Characterization results reveal that the enhanced activity is associated with the strong metal‒support interaction (SMSI) induced formation of Gd2O3 overlayer on the Ru NPs. With a relatively low reduction temperature, the exposed Ru NPs possess relatively low activity toward NH3 decomposition. After high temperature activation treatment, the Gd2O3 overlayer coated Ru NPs show much enhanced intrinsic activity than that of the exposed Ru NPs. This study brings a facile strategy to modulate the catalytic performance of oxide supported Ru catalysts by regulating the SMSI of catalysts.
