Highly Efficient Electroreduction of CO2 to Methanol on Palladium–Copper Bimetallic Aerogels

Electrochemical reduction of CO2 to CH3OH is of great interest. Aerogels have fine inorganic superstructure with high porosity and are known to be exceptional materials. Now a Pd−Cu bimetallic aerogel electrocatalyst has been developed for conversion of CO2 into CH3OH. The current density and Farada...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2018-10, Vol.57 (43), p.14149-14153
Main Authors: Lu, Lu, Sun, Xiaofu, Ma, Jun, Yang, Dexin, Wu, Haihong, Zhang, Bingxing, Zhang, Jianling, Han, Buxing
Format: Article
Language:English
Subjects:
Aerogels
Bimetals
Carbon dioxide
Chemical reduction
Copper
electrocatalysis
Electrochemistry
Grain boundaries
ionic liquids
methanol
Palladium
Porosity
Superstructures
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Summary:Electrochemical reduction of CO2 to CH3OH is of great interest. Aerogels have fine inorganic superstructure with high porosity and are known to be exceptional materials. Now a Pd−Cu bimetallic aerogel electrocatalyst has been developed for conversion of CO2 into CH3OH. The current density and Faradaic efficiency of CH3OH can be as high as 31.8 mA cm−2 and 80.0 % over the Pd83Cu17 aerogel at a very low overpotential (0.24 V). The superior performance of the electrocatalyst results from efficient adsorption and stabilization of the CO2 radical anion, high Pd0/PdII and CuI+Cu0/CuII ratios, and sufficient Pd/Cu grain boundaries of aerogel nanochains. A Pd−Cu bimetallic aerogel was an outstanding electrocatalyst for conversion of CO2 into CH3OH in an aqueous solution of ionic liquid. The current density could reach 31.8 mA cm−2 with a Faradaic efficiency of 80.0 % over the Pd83Cu17 aerogel electrode at a low overpotential of 0.24 V.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201808964