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High‐Pressure CO Electroreduction at Silver Produces Ethanol and Propanol
Author(s) -
Raaijman Stefan J.,
Schellekens Maarten P.,
Corbett Paul J.,
Koper Marc T. M.
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202108902
Subject(s) - electrocatalyst , acetaldehyde , chemistry , ethanol , density functional theory , copper , catalysis , selectivity , electrochemistry , desorption , propanol , ambient pressure , inorganic chemistry , organic chemistry , computational chemistry , thermodynamics , electrode , adsorption , physics
Reducing CO 2 to long‐chain carbon products is attractive considering such products are typically more valuable than shorter ones. However, the best electrocatalyst for making such products from CO 2 , copper, lacks selectivity. By studying alternate C 2+ producing catalysts we can increase our mechanistic understanding, which is beneficial for improving catalyst performance. Therefore, we investigate CO reduction on silver, as density functional theory (DFT) results predict it to be good at forming ethanol. To address the current disagreement between DFT and experimental results (ethanol vs. no ethanol), we investigated CO reduction at higher surface coverage (by increasing pressure) to ascertain if desorption effects can explain the discrepancy. In terms of product trends, our results agree with the DFT‐proposed acetaldehyde‐like intermediate, yielding ethanol and propanol as C 2+ products—making the CO 2 electrochemistry of silver very similar to that of copper at sufficiently high coverage.