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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Electrodeposited Tin-Antimony Alloys as Novel Electrocatalysts for Selective and Stable Carbon Dioxide Reduction to Formate

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Author(s):
Lucas, Francisco W. S. [1] ; Lima, Fabio H. B. [1]
Total Authors: 2
Affiliation:
[1] Univ Sao Paulo, Inst Chem Sao Carlos, Trabalhador Sao Carlense Ave 400, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: CHEMELECTROCHEM; AUG 2020.
Web of Science Citations: 0
Abstract

The activity of SnSb alloy films as electrocatalysts for the CO(2)reduction reaction (CO2RR) to formate was presented for the first time. The effects of the film composition, electrochemical potential, and nature and concentration of the supporting electrolyte on the activity and long-term stability of these catalysts were evaluated. Sn(9)Sb(1)alloy exhibited improved long-term stability when compared to pure Sn films, and this was attributed to the lower insertion of alkali and lower formation of hydride species, inhibiting the electrode disintegration. Additionally, the Sn(9)Sb(1)film exhibited the highest faradaic efficiency (F.E.) among all prepared films, including pure Sn, reaching 96.2 % at -1.25 V vs. RHE. This was ascribed to the better balance between the number of Sn atoms (active species) exposed on the surface and the induced morphologic effect brought by the presence of Sb, generating cube-shaped crystallites. These structures have a high number of undercoordinated surface atoms (located on the steps, corners, and kinks) and grain boundaries, resulting in more ``reactive{''} Sn atoms, which serve as CO(2)activation sites, increasing the overall activity and F.E. for formate production. (AU)

FAPESP's process: 16/13323-0 - Carbon Dioxide and Water Electrochemistry: Application in Energy Conversion and Storage
Grantee:Fabio Henrique Barros de Lima
Support type: Regular Research Grants
FAPESP's process: 13/16930-7 - Electrocatalysis V: electrocatalytic processes of chemical and electrical energy interconversion
Grantee:Edson Antonio Ticianelli
Support type: Research Projects - Thematic Grants
FAPESP's process: 18/03156-5 - A high-throughput combinatorial approach in the study of metallic alloys and their respective chalcogenides for application in the CO2 photo-/electrochemical reduction reaction
Grantee:Francisco Willian de Souza Lucas
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 19/22183-6 - Electrocatalysis VI: fundamental and applied aspects of emerging and classical problems in electrochemical energy conversion
Grantee:Edson Antonio Ticianelli
Support type: Research Projects - Thematic Grants