Mesostructure-Induced Selectivity in CO[subscript 2] Reduction Catalysis
Name
2015_AuCO2_Mesostructure_Text_Revision_Final.pdf
Description
Main article
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4.53 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Hall, Anthony Shoji
Yoon, Youngmin
Wuttig, Anna
Surendranath, Yogesh
Alternative Title
Mesostructure-Induced Selectivity in CO2 Reduction Catalysis
Date Issued
November 2015
Journal
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Citation
Hall, Anthony Shoji et al. “Mesostructure-Induced Selectivity in CO 2 Reduction Catalysis.” Journal of the American Chemical Society 137.47 (2015): 14834–14837.
Version
Author's final manuscript
Abstract
Gold inverse opal (Au-IO) thin films are active for CO[subscript 2] reduction to CO with high efficiency at modest overpotentials and high selectivity relative to hydrogen evolution. The specific activity for hydrogen evolution diminishes by 10-fold with increasing porous film thickness, while CO evolution activity is largely unchanged. We demonstrate that the origin of hydrogen suppression in Au-IO films stems from the generation of diffusional gradients within the pores of the mesostructured electrode rather than changes in surface faceting or Au grain size. For electrodes with optimal mesoporosity, 99% selectivity for CO evolution can be obtained at overpotentials as low as 0.4 V. These results establish electrode mesostructuring as a complementary method for tuning selectivity in CO[subscript 2] -to-fuels catalysis.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1021/jacs.5b08259
