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Title: Toward Carbon Monoxide Methanation at Mild Conditions on Dual-Site Catalysts

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.3c02180· OSTI ID:1991101
 [1];  [1];  [2];  [1]; ORCiD logo [3]; ORCiD logo [1]
  1. Westlake Univ., Hangzhou (China); Westlake Institute of Advanced Study, Hangzhou (China)
  2. Westlake Univ., Hangzhou (China)
  3. SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

The catalytic carbon monoxide (CO) methanation is an ideal model reaction for the fundamental understanding of catalysis on the gas–solid interface and is crucial for various industrial processes. However, the harsh operating conditions make the reaction unsustainable, and the limitations set by the scaling relations between the dissociation energy barrier and dissociative binding energy of CO further increase the difficulty in designing high-performance methanation catalysts operating under milder conditions. In this work, we proposed a theoretical strategy to circumvent the limitations elegantly and achieve both facile CO dissociation and C/O hydrogenation on the catalyst containing a confined dual site. The DFT-based microkinetic modeling (MKM) reveals that the designed Co-Cr2/G dual-site catalyst could provide 4–6 orders of magnitude higher turnover frequency for CH4 production than the cobalt step sites. We believe that the proposed strategy in the current work will provide essential guidance for designing state-of-the-art methanation catalysts under mild conditions.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1991101
Journal Information:
Journal of the American Chemical Society, Vol. 145, Issue 15; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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