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Microstructural origin of locally enhanced CO2 electroreduction activity on gold
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Mariano, Ruperto G, Kang, Minkyung, Wahab, Oluwasegun J., McPherson, Ian J., Rabinowitz, Joshua A, Unwin, Patrick R. and Kanan, Matthew W. (2021) Microstructural origin of locally enhanced CO2 electroreduction activity on gold. Nature Materials, 20 . pp. 1000-1006. doi:10.1038/s41563-021-00958-9 ISSN 1476-1122.
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Official URL: http://dx.doi.org/10.1038/s41563-021-00958-9
Abstract
Understanding how the bulk structure of a material affects catalysis on its surface is critical to the development of actionable catalyst design principles. Bulk defects have been shown to affect electrocatalytic materials that are important for energy conversion systems, but the structural origins of these effects have not been fully elucidated. Here we use a combination of high-resolution scanning electrochemical cell microscopy and electron backscatter diffraction to visualize the potential-dependent electrocatalytic carbon dioxide [Formula: see text] electroreduction and hydrogen [Formula: see text] evolution activity on Au electrodes and probe the effects of bulk defects. Comparing colocated activity maps and videos to the underlying microstructure and lattice deformation supports a model in which CO electroreduction is selectively enhanced by surface-terminating dislocations, which can accumulate at grain boundaries and slip bands. Our results suggest that the deliberate introduction of dislocations into materials is a promising strategy for improving catalytic properties.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||
SWORD Depositor: | Library Publications Router | ||||||||
Journal or Publication Title: | Nature Materials | ||||||||
Publisher: | Nature Publishing Group | ||||||||
ISSN: | 1476-1122 | ||||||||
Official Date: | July 2021 | ||||||||
Dates: |
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Volume: | 20 | ||||||||
Page Range: | pp. 1000-1006 | ||||||||
DOI: | 10.1038/s41563-021-00958-9 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access |
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