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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.)

The effect of support on Pd1Nb1 electrocatalysts for ethanol fuel cells

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Souza, Felipe M. [1] ; Nandenha, Julio [2] ; Oliveira, Vitor H. A. [1] ; Paz, Edson C. [1] ; Pinheiro, Victor S. [1] ; Aveiro, Luci R. [1] ; Parreira, Luanna S. [3] ; Silva, Julio C. M. [4] ; Batista, Bruno L. [1] ; Neto, Almir O. [2] ; Santos, Mauro C. [1]
Total Authors: 11
[1] Univ Fed ABC UFABC, CCNH, LEMN, Rua Santa Adelia 166, BR-09210170 Santo Andre, SP - Brazil
[2] CNEN SP, IPEN, Ave Prof Lineu Prestes 2242, BR-05508000 Sao Paulo, SP - Brazil
[3] Univ Sao Paulo, IQ, Ave Prof Lineu Prestes 748, BR-05508000 Sao Paulo, SP - Brazil
[4] Univ Fed Fluminense, Inst Quim, Grp Eletroquim & Mat Nanoestruturados, Campus Valonguinho, BR-24020141 Niteroi, RJ - Brazil
Total Affiliations: 4
Document type: Journal article
Source: RENEWABLE ENERGY; v. 150, p. 293-306, MAY 2020.
Web of Science Citations: 0

Pd1Nb1/C on different kinds of carbon black were prepared by a modified sol-gel method. The alkaline direct ethanol fuel cell (ADEFC) performance was performed first with the Pd1Nb1 electrocatalysts and then by varying the fuel concentration. In CV, Pd1Nb1/Printex 6L (50:50 wt%) exhibited 2.2 times higher mass activity than that of the Pd/C (Alfa Aesar); their mass activities were 1300 and 590 mA mg(Pd)(-1), respectively. The best performance for the ADEFC was obtained using Pd1Nb1/Printex 6L, which yielded a maximum power density and cell voltage of 28 mW cm(-2) and 1.17 V, respectively. The Pd1Nb1/Printex 6L electrocatalyst exhibited a more negative onset potential for the CO stripping reaction. We suggest that the higher hydrophilicity (contact angle) and higher degree of disorder of Printex 6L (Raman) corroborates these results. In addition, both bifunctional and electronic effects operated on the electrocatalyst due to the presence of metal oxides and alloys of PdNb (XRD), respectively, in the synthesized electrocatalysts. Therefore, it was notable that the support has an essential role-as important as the cocatalyst-in the electrocatalytic performance. (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