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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.)

Sn-containing electrocatalysts with a reduced amount of palladium for alkaline direct ethanol fuel cell applications

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Author(s):
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Pinheiro, Victor S. [1] ; Souza, Felipe M. [1] ; Gentil, Tuani C. [1] ; Nascimento, Aline N. [1] ; Bohnstedt, Paula [1] ; Parreira, Luanna S. [1] ; Paz, Edson C. [2] ; Hammer, Peter [3] ; Sairre, I, Mirela ; Batista, Bruno L. [4] ; Santos, Mauro C. [4]
Total Authors: 11
Affiliation:
[1] Univ Fed ABC UFABC, Lab Eletroquim & Mat Nanoestruturados LEMN, Ctr Ciencias Nat & Humanas CCNH, Rua Santa Adelia 166, BR-09210170 Santo Andre, SP - Brazil
[2] Inst Fed Educ Ciencia & Tecnol Maranhao IFMA, Campus Acailandia, R Projetada S-N, BR-65930000 Acailandia, MA - Brazil
[3] Univ Estadual Paulista, Inst Quim, UNESP, BR-14800060 Araraquara, SP - Brazil
[4] Sairre, Mirela, I, Univ Fed ABC UFABC, Lab Eletroquim & Mat Nanoestruturados LEMN, Ctr Ciencias Nat & Humanas CCNH, Rua Santa Adelia 166, BR-09210170 Santo Andre, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: RENEWABLE ENERGY; v. 158, p. 49-63, OCT 2020.
Web of Science Citations: 0
Abstract

In this work electrocatalysts based on Pd and Sn nanoparticles supported on Vulcan XC-72 carbon black with a reduced amount of Pd were prepared. We evaluated its electrocatalytic activity for ethanol oxidation reaction (EOR) in alkaline direct ethanol fuel cells (ADEFCs). The electrocatalysts were synthesized in different Pd:Sn mass ratios (1:3,1:1, 3:1 and 1:0) on the carbon containing 20 wt % of metal. The XRD patterns of the electrocatalysts revealed an alloy formation between Pd and Sn, and the electrocatalysts with lowest amount of Pd (Pd1Sn3/Vulcan XC-72) and highest electrochemically active surface area (ECSA) presented best performance in ADEFC experiments with a maximum current density and power density of 152 mA cm-2 and 42 mW cm-2, respectively. Besides the current density three times higher for EOR than that of the pure Pd, the open circuit potential of 939 mV at an operation temperature of 80 degrees C yielded the higher carbonate production. This behavior can be attributed to the presence of oxophilic Sn species, which improve the ability to remove adsorbed CO. Oxygenated species, vacancies and defects detected in the structure of PdxSny/Vulcan XC-72 catalysts are accounted for their high activity, making them very promising for the application in ADEFC. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 17/26288-1 - Hybrid electrocatalysts based on Pd, Pt and Sn nanoparticles, and on ceria nanorods for application in fuel cells
Grantee:Victor dos Santos Pinheiro
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 15/10314-8 - Nanostructures for Phenol, Ciprofloxacin and 17±-ethinylestradiol Degradation
Grantee:Mauro Coelho dos Santos
Support type: Regular Research Grants
FAPESP's process: 17/22976-0 - Development of palladium and niobium nanoelectrocatalysts for alkaline direct ethanol fuel cells
Grantee:Felipe de Moura Souza
Support type: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 17/10118-0 - Study and application of electrochemical technology for the analysis and degradation of endocrine interferents: materials, sensors, processes and scientific dissemination
Grantee:Marcos Roberto de Vasconcelos Lanza
Support type: Research Projects - Thematic Grants
FAPESP's process: 17/21846-6 - Nanostructures for environmental remediation and power generation from renewable sources
Grantee:Mauro Coelho dos Santos
Support type: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
FAPESP's process: 18/26307-9 - Development of Pd and Nb electrocatalysts for application in fuel cells and degradation of organic pollutants
Grantee:Paula Böhnstedt
Support type: Scholarships in Brazil - Scientific Initiation