Electrochemical Reduction of CO2 to Formate on Easily Prepared Carbon-Supported Bi Nanoparticles

Ávila-Bolívar, Beatriz; García-Cruz, Leticia; Montiel, Vicente; Solla-Gullón, José

doi:10.3390/molecules24112032

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Electrochemical Reduction of CO₂ to Formate on Easily Prepared Carbon-Supported Bi Nanoparticles

Beatriz Ávila-Bolívar

Leticia García-Cruz

Vicente Montiel

and

José Solla-Gullón

Instituto de Electroquímica, Universidad de Alicante, Apartado 99, 03080 Alicante, Spain

Author to whom correspondence should be addressed.

Academic Editor: Paramaconi Rodriguez

Molecules 2019, 24(11), 2032; https://doi.org/10.3390/molecules24112032

Received: 15 April 2019 / Revised: 21 May 2019 / Accepted: 24 May 2019 / Published: 28 May 2019

(This article belongs to the Special Issue Nanocatalysts for Electrochemical Reduction of CO2)

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Abstract

Herein, the electrochemical reduction of CO₂ to formate on carbon-supported bismuth nanoparticles is reported. Carbon-supported Bi nanoparticles (about 10 nm in size) were synthesized using a simple, fast and scalable approach performed under room conditions. The so-prepared Bi electrocatalyst was characterized by different physicochemical techniques, including transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction and subsequently air-brushed on a carbon paper to prepare electrodes. These electrodes were characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy and also by cyclic voltammetry. Finally, CO₂ electroreduction electrolyses were performed at different electrode potentials for 3 h. At the optimal electrode potential (−1.6 V vs AgCl/Ag), the concentration of formate was about 77 mM with a faradaic efficiency of 93 ± 2.5%. A 100% faradaic efficiency was found at a lower potential (−1.5 V vs AgCl/Ag) with a formate concentration of about 55 mM. In terms of stability, we observed that after about 70 h (in 3 h electrolysis experiments at different potentials), the electrode deactivates due to the gradual loss of metal as shown by SEM/EDX analyses of the deactivated electrodes. View Full-Text

Keywords: electrocatalysis; CO₂ reduction; Bi electrodes; formate

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MDPI and ACS Style

Ávila-Bolívar, B.; García-Cruz, L.; Montiel, V.; Solla-Gullón, J. Electrochemical Reduction of CO₂ to Formate on Easily Prepared Carbon-Supported Bi Nanoparticles. Molecules 2019, 24, 2032. https://doi.org/10.3390/molecules24112032

AMA Style

Ávila-Bolívar B, García-Cruz L, Montiel V, Solla-Gullón J. Electrochemical Reduction of CO₂ to Formate on Easily Prepared Carbon-Supported Bi Nanoparticles. Molecules. 2019; 24(11):2032. https://doi.org/10.3390/molecules24112032

Chicago/Turabian Style

Ávila-Bolívar, Beatriz, Leticia García-Cruz, Vicente Montiel, and José Solla-Gullón. 2019. "Electrochemical Reduction of CO₂ to Formate on Easily Prepared Carbon-Supported Bi Nanoparticles" Molecules 24, no. 11: 2032. https://doi.org/10.3390/molecules24112032

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Electrochemical Reduction of CO₂ to Formate on Easily Prepared Carbon-Supported Bi Nanoparticles

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