Cited by 387CO2 Reduction Techniques and CatalystsMachine Learning in Materials ScienceElectrocatalysts for Energy Conversion

Machine-Learning Methods Enable Exhaustive Searches for Active Bimetallic Facets and Reveal Active Site Motifs for CO 2 Reduction

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Ulissi, Zachary W., Tang, Michael T., Xiao, Jianping, Liu, Xinyan, Torelli, Daniel A., Karamad, Mohammadreza, Cummins, Kyle, Hahn, Christopher +4 more·2017·ACS Catalysis

Abstract

Bimetallic catalysts are promising for the most difficult thermal and electrochemical reactions, but modeling the many diverse active sites on polycrystalline samples is an open challenge. We present a general framework for addressing this complexity in a systematic and predictive fashion. Active sites for every stable low-index facet of a bimetallic crystal are enumerated and cataloged, yielding hundreds of possible active sites. The activity of these sites is explored in parallel using a neural-network-based surrogate model to share information between the many density functional theory (DFT) relaxations, resulting in activity estimates with an order of magnitude fewer explicit DFT calculations. Sites with interesting activity were found and provide targets for follow-up calculations. This process was applied to the electrochemical reduction of CO 2 on nickel gallium bimetallics and indicated that most facets had similar activity to Ni surfaces, but a few exposed Ni sites with a very favorable on-top CO configuration. This motif emerged naturally from the predictive modeling and represents a class of intermetallic CO 2 reduction catalysts. These sites rationalize recent experimental reports of nickel gallium activity and why previous materials screens missed this exciting material. Most importantly these methods suggest that bimetallic catalysts will be discovered by studying facet reactivity and diversity of active sites more systematically.

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Authors
Ulissi, Z. W., Tang, M. T., Xiao, J., Liu, X., Torelli, D. A., Karamad, M., Cummins, K., Hahn, C., Lewis, N. S., Jaramillo, T. F., Chan, K., & Nørskov, J. K.
Affiliations
  • SLAC National Accelerator Laboratory (US)
  • California Institute of Technology (US)
  • Stanford University (US)
  • Joint Center for Artificial Photosynthesis (US)
Corresponding author
  • Chan, Karen
  • Nørskov, Jens K.
Venue
ACS Catalysis
Published
2017-08-31
Volume
7
Issue
10
Pages
6600-6608
ISSN
2155-5435 (ISSN-L)
OpenAlex
W2741906484
Cited by
387
References
24
Citations by year
2026: 30 · 2025: 23 · 2024: 42 · 2023: 31 · 2022: 55 · 2021: 55 · 2020: 68 · 2019: 37 · 2018: 44 · 2017: 2
FWCI
11.04
Type
journal article
Language
en
Open access
Locations
  • ACS Catalysis (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion)
Funders
  • National Science Foundation (DGE-114747)
  • U.S. Department of Energy (DE-AC02-05CH11231, DE-SC0004993)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
  • Physical Sciences › Materials Science › Materials Chemistry › Machine Learning in Materials Science
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
Keywords
bimetallic catalysts, CO2 reduction, active site identification, low-index facets, neural network surrogate model, intermetallic catalysts, electrochemical CO2 reduction

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