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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.)

Niobium increasing the electrocatalytic activity of palladium for alkaline direct ethanol fuel cell

Full text
Author(s):
Moura Souza, F. [1] ; Bohnstedt, P. [1] ; Pinheiro, V. S. [1] ; Oliveira, L. A. [1] ; Batista, B. L. [1] ; Parreira, L. S. [2] ; Antunes, R. A. [1] ; Santos, M. C. [1]
Total Authors: 8
Affiliation:
[1] Univ Fed Abc, LEMN, CCNH, Rua Santa Adelia 166, BR-09210170 Santo Andre, SP - Brazil
[2] Univ Sao Paulo, IQ, Ave Prof Lineu Prestes 748, Cidade Univ, BR-05508000 Sao Paulo, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 858, FEB 1 2020.
Web of Science Citations: 0
Abstract

Palladium and niobium in 1: 0, 3:1, 2:1 and 1:1 carbon black electrocatalysts, respectively, were prepared by a chemical reduction method. The Pd1Nb1/C electrocatalyst showed a maximum power density of 27 mW cm(-2) at 60 degrees C in the ethanol direct alkaline fuel cell (ADEFC) experiment. The residues of products formed in 60 degrees C of ADEFC operation were analyzed by FT-Raman and Pd1Nb1/C presented higher carbonate formation than the other products using the different electrocatalysts. In addition, the electrocatalysts of Pd1Nb1/C exhibited a more negative onset potential for both the CO stripping experiment and the ethanol oxidation reaction. Nb also increased the exchange current density by ethanol oxidation using the different electrocatalysts. We suggest that higher hydrophilicity, greater number of defects and oxygenated species promote bifunctional and electronic effects, improving the electrocatalytic activity of Pd. Therefore, Nb is an interesting co-catalyst for ADEFC Pd-based electrocatalysts. (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