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Title: Lattice Strained Ni-Co alloy as a High-Performance Catalyst for Catalytic Dry Reforming of Methane

Journal Article · · ACS Catalysis
 [1];  [2];  [3];  [3];  [4];  [5];  [5]; ORCiD logo [6];  [3]; ORCiD logo [4]
  1. Peking Univ., Beijing (China); Chinese Academy of Sciences (CAS), Beijing (China)
  2. Chinese Academy of Sciences (CAS), Beijing (China); Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Chinese Academy of Sciences (CAS), Beijing (China)
  4. Peking Univ., Beijing (China)
  5. Argonne National Lab. (ANL), Lemont, IL (United States)
  6. Univ. of New Haven, West Haven, CT (United States)

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 molCH4 molNi-1s-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 H2 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 CO2 dissociation ability, which is responsible for its superior catalytic performance. Its weak chemisorption with H2 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.

Research Organization:
Argonne National Lab. (ANL), Lemont, IL (United States)
Sponsoring Organization:
National Natural Science Foundation of China; National Key Research and Development Program of China; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1510302
Journal Information:
ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 4 Vol. 9; ISSN 2155-5435
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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