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Title: Predicted Structures of the Active Sites Responsible for the Improved Reduction of Carbon Dioxide by Gold Nanoparticles

Journal Article · · Journal of Physical Chemistry Letters

Gold (Au) nanoparticles (NPs) are known experimentally to reduce carbon dioxide (CO2) to carbon monoxide (CO), with far superior performance to Au foils. To obtain guidance in designing improved CO2 catalysts, we want to understand the nature of the active sites on Au NPs. Here, we employed multiscale atomistic simulations to computationally synthesize and characterize a 10 nm thick Au NP on a carbon nanotube (CNT) support, and then we located active sites from quantum mechanics (QM) calculations on 269 randomly selected sites. The standard scaling relation is that the formation energy of *COOH (ΔE*COOH) is proportional to the binding energy of *CO (Ebinding*CO); therefore, decreasing ΔE*COOH to boost the CO2 reduction reaction (CO2RR) causes an increase of Ebinding*CO that retards CO2RR. We show that the NPs have superior CO2RR because there are many sites at the twin boundaries that significantly break this scaling relation.

Research Organization:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0004993
OSTI ID:
1467601
Journal Information:
Journal of Physical Chemistry Letters, Vol. 8, Issue 14; ISSN 1948-7185
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

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Cited By (9)

On the origin of the elusive first intermediate of CO 2 electroreduction journal September 2018
Recent Progress in the Theoretical Investigation of Electrocatalytic Reduction of CO 2 journal April 2018
Tuning Gold Nanoparticles with Chelating Ligands for Highly Efficient Electrocatalytic CO 2 Reduction journal August 2018
Electrochemical CO 2 Reduction into Chemical Feedstocks: From Mechanistic Electrocatalysis Models to System Design journal December 2018
A Highly Active Star Decahedron Cu Nanocatalyst for Hydrocarbon Production at Low Overpotentials journal December 2018
Insight into the Formation and Transfer Process of the First Intermediate of CO 2 Reduction over Ag‐Decorated Dendritic Cu journal October 2019
Preventing the Deactivation of Gold Cathodes During Electrocatalytic CO2 Reduction While Avoiding Gold Dissolution journal October 2019
Tuning the Pd-catalyzed electroreduction of CO 2 to CO with reduced overpotential journal January 2018
Tuning Gold Nanoparticles with Chelating Ligands for Highly Efficient Electrocatalytic CO 2 Reduction journal August 2018

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