Formic acid electrooxidation on small, [100] structured, and Pd decorated carbon-supported Pt nanoparticles

Autor(es)

Antoniassi, Rodolfo M. ^{[1, 2]} ; Erikson, Heiki ^{[3, 1]} ; Solla-Gullon, Jose ^[1] ; Torresi, Roberto M. ^[2] ; Feliu, Juan M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Alicante, Inst Electroquim, Ap 99, E-03080 Alicante - Spain

^[2] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Av Prof LineuPrestes 748, BR-05508000 Sao Paulo, SP - Brazil

^[3] Univ Tartu, Inst Chem, Ravila 14a, EE-50411 Tartu - Estonia

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF CATALYSIS; v. 400, p. 140-147, AUG 2021.
• Citações Web of Science: 0

Resumo

The use of shape-controlled nanomaterials represents an elegant way to improve the performance of many electrochemical reactions. However, two main aspects must be still optimised: decreasing particle size and increasing their activity. This study shows that the deposition of Pd on different small (3-5 nm) supported Pt materials (displaying a preferential structure containing similar to 40% of Pt[1 0 0] terraces) leads to a great enhancement in the electrocatalytic activity towards the formic acid electrooxidation reaction. After Pd decoration, the oxidation takes place at lower overpotentials and oxidation current densities are significantly higher than those observed with all the bare Pt/C samples. For the Pt/C 45% catalyst, the intrinsic activity after Pd deposition was more than three times of that without Pd, while the oxidation overpotential shifted about similar to 200 mV to lower overpotentials. (C) 2021 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 17/15469-5 - Preparação de nanocatalisadores com morfologia controlada para aplições em purificação de hidrogênio e oxidação de hidrogênio contaminado para geração de energia elétrica
• Beneficiário: Rodolfo Molina Antoniassi
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado