Selective increase in CO 2 electroreduction activity at grain-boundary surface terminations
Abstract
Going with the grain boundaries: Bulk defects in a metal, such as grain boundaries, can create regions of increased strain at its surface that could affect its catalytic activity. Mariano et al. studied the electroreduction of CO 2 to CO on polycrystalline gold films, a reaction that competes with H 2 evolution. By annealing the films to create larger grains, they could change the types and distribution of grain boundaries at the surface. Scanning electrochemical cell microscopy revealed that the dislocation density correlated with CO 2 electroreduction activity, but such defects had no effect on H 2 evolution. Science , this issue p. 1187
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Metal-free carbon-based materials have received attention due to their electrocatalytic activity for CO2RR.
“In an effort to reduce catalyst expense, metal-free carbon based materials have received attention due to their electrocatalytic activity for CO2RR.[86]”
From Electrochemical CO <sub>2</sub> Reduction into Chemical Feedstocks: From Mechanistic Electrocatalysis Models to System Design (2019) · cites this paper as [86]
Metal-free carbon electrode materials have also been reported for CO2RR to hydrocarbons and oxygenates.
“Metal-free carbon electrode materials have also been reported for CO2RR to hydrocarbons and oxygenates.[86]”
From Electrochemical CO <sub>2</sub> Reduction into Chemical Feedstocks: From Mechanistic Electrocatalysis Models to System Design (2019) · cites this paper as [86]
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- Authors
- Mariano, R. G., McKelvey, K., White, H. S., & Kanan, M. W.
- Affiliations
- Stanford University (US)
- University of Utah (US)
- Corresponding author
- McKelvey, Kim
- Kanan, Matthew W.
- Venue
- Science
- Published
- 2017-12
- Volume
- 358
- Issue
- 6367
- Pages
- 1187-1192
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2772769038
- Cited by
- 818
- References
- 54
- Citations by year
- 2026: 54 · 2025: 85 · 2024: 95 · 2023: 88 · 2022: 110 · 2021: 116 · 2020: 125 · 2019: 93 · 2018: 52
- FWCI
- 19.80
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Science Foundation (award339015, CHE-1565945)
- Air Force Office of Scientific Research (award339016, FA9550-14-1-0003)
- Topics
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Chemical Engineering › Catalysis › Catalysts for Methane Reforming
- Keywords
- electrochemical CO2 reduction, grain boundaries, polycrystalline gold films, dislocation density, hydrogen evolution reaction, electrocatalysis, grain size, surface strain, scanning electrochemical cell microscopy
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