Effect of TiO2 and Synthesis Strategies on Formate Oxidation: Electrochemical and Fuel Cell Approaches

Effect of TiO2 and Synthesis Strategies on Formate Oxidation: Electrochemical and Fuel Cell Approaches

Direct formate fuel cells have gained increasing attention since formate can be obtained by CO 2 reduction, being shown as a renewable power source. This paper reports the use of Pd nanoparticles supported on physical mixtures of Vulcan carbon and TiO 2 in different ratios and different Pd reduction...

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Bibliographic Details
Published in:Electrocatalysis Vol. 14; no. 2; pp. 221 - 231
Main Authors: Guimarães, Vitória Pistori, Nandenha, Júlio, Orzari, Luiz Otávio, Fatibello-Filho, Orlando, Neto, Almir Oliveira, Janegitz, Bruno Campos, Vicentini, Fernando Campanhã, Assumpção, Mônica Helena Marcon Teixeira
Format: Journal Article
Language:English
Published: New York Springer US 01-03-2023
Springer Nature B.V
Subjects:
Anatase
Carbon
Catalysis
Chemistry
Chemistry and Materials Science
Electrical resistivity
Electrocatalysts
Electrochemistry
Energy Systems
Fuel cells
Mixtures
Nanoparticles
Original Research
Oxidation
Palladium
Physical Chemistry
Power sources
Reducing agents
Synthesis
Titanium dioxide
Pd nanoparticles
TiO
Formate electro-oxidation
Direct formate fuel cell
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Summary:Direct formate fuel cells have gained increasing attention since formate can be obtained by CO 2 reduction, being shown as a renewable power source. This paper reports the use of Pd nanoparticles supported on physical mixtures of Vulcan carbon and TiO 2 in different ratios and different Pd reduction methodologies. The materials were prepared using sodium borohydride as a reducing agent and analyzed toward formate oxidation in alkaline media. The prepared electrocatalysts showed peaks of Pd face-centered cubic and TiO 2 anatase and rutile phases and an average particle size between 3.7 and 7.9 nm. Experiments considering formate electro-oxidation (voltammetry and chronoamperometry) showed that the presence of TiO 2 is favorably using both synthesis methodologies while single cells revealed Pd nanoparticles supported on physical mixtures of carbon and TiO 2 , in the proportion of 75:25 as the most efficient, which was explained by the carbon high electrical conductivity and small quantities of TiO 2 working as co-catalyst. Graphical Abstract
ISSN:1868-2529
1868-5994
DOI:10.1007/s12678-022-00789-5