Grain-Boundary-Dependent CO 2 Electroreduction Activity
Abstract
Uncovering new structure-activity relationships for metal nanoparticle (NP) electrocatalysts is crucial for advancing many energy conversion technologies. Grain boundaries (GBs) could be used to stabilize unique active surfaces, but a quantitative correlation between GBs and catalytic activity has not been established. Here we use vapor deposition to prepare Au NPs on carbon nanotubes (Au/CNT). As deposited, the Au NPs have a relatively high density of GBs that are readily imaged by transmission electron microscopy (TEM); thermal annealing lowers the density in a controlled manner. We show that the surface-area-normalized activity for CO2 reduction is linearly correlated with GB surface density on Au/CNT, demonstrating that GB engineering is a powerful approach to improving the catalytic activity of metal NPs.
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Detailed DFT studies suggest the attachment of amine molecules to Ag nanoparticles destabilizes hydrogen binding, and thereby suppresses HER.
“Detailed DFT studies suggest the attachment of amine molecules to Ag nanoparticles destabilizes hydrogen binding, and thereby suppresses HER.[85]”
From Electrochemical CO <sub>2</sub> Reduction into Chemical Feedstocks: From Mechanistic Electrocatalysis Models to System Design (2019) · cites this paper as [85]
The introduction of small organic molecules on the surface of Ag nanoparticles was reported to be an effective way to improve CO2RR activity.
“Likewise, the introduction of small organic molecules on the surface of Ag nanoparticles was reported to be an effective way to improve the CO2RR activity.[85]”
From Electrochemical CO <sub>2</sub> Reduction into Chemical Feedstocks: From Mechanistic Electrocatalysis Models to System Design (2019) · cites this paper as [85]
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- Authors
- Feng, X., Jiang, K., Fan, S., & Kanan, M. W.
- Affiliations
- Stanford University (US)
- Tsinghua University (CN)
- Corresponding author
- Kanan, Matthew W.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-04-06
- Volume
- 137
- Issue
- 14
- Pages
- 4606-4609
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2070384700
- Cited by
- 694
- References
- 24
- Citations by year
- 2026: 23 · 2025: 50 · 2024: 54 · 2023: 55 · 2022: 79 · 2021: 69 · 2020: 103 · 2019: 80 · 2018: 71 · 2017: 58 · 2016: 38 · 2015: 13
- FWCI
- 17.74
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of the American Chemical Society (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Division of Chemistry (CHE-1266401)
- Stanford University (106765)
- 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, gold nanoparticles, carbon nanotubes, structure-activity relationship, annealing, vapor deposition
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