Reversible loss of core-shell structure for Ni-Au bimetallic nanoparticles during CO[subscript 2] hydrogenation
Abstract not provided
Zhang, Xiaoben↗
Engineering topics
Wu, Zhaoxuan
Publications and source records attributed to Wu, Zhaoxuan.
Lattice Strained Ni-Co alloy as a High-Performance Catalyst for Catalytic Dry Reforming of Methane
Dry reforming of methane (DRM) is an effective route to convert methane and carbon dioxide to syngas. IN this work, we report an efficient nickel cobalt bimetallic catalyst with an activity of 4.97 mol CH4 mol Ni -1 s -1 at 800 °C. It is active at low temperature as well, and near thermodynamic equilibrium conversion was achieved as low as 350 °C, with a high yield of H 2 implying inhibition of side reactions: i.e., a reverse water-gas shift (RWGS) reaction. The formation of Ni-Co alloy during the reaction was observed, and its lattice contraction was revealed by HAADF-STEM and EXAFS experiments. The lattice-strained Ni-Co alloy has good CO 2 dissociation ability, which is responsible for its superior catalytic performance. Its weak chemisorption with H 2 results in inhibition of RWGS side reactions. This research is helpful in the design and development of other metal alloy materials with novel structures and/or electronic configurations for catalytic applications.
36 MATERIALS SCIENCE↗