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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.)

PtAu/C electrocatalysts as anodes for direct ammonia fuel cell

Full text
Author(s):
Silva, Julio Cesar M. [1] ; da Silva, Sirlane G. [1] ; De Souza, Rodrigo F. B. [1] ; Buzzo, Guilherme S. [1] ; Spinace, Estevam V. [1] ; Neto, Almir O. [1] ; Assumpcao, Monica H. M. T. [1]
Total Authors: 7
Affiliation:
[1] IPEN CNEN SP, Inst Pesquisas Energet & Nucl, BR-05508900 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: APPLIED CATALYSIS A-GENERAL; v. 490, p. 133-138, JAN 25 2015.
Web of Science Citations: 12
Abstract

PtAu/C electrocatalysts prepared by borohydride reduction method with different Pt:Au atomic ratios (50:50 and 70:30) were tested as work electrodes/anodes in electrochemical experiments and also using a direct ammonia fuel cell (DAFC). X-ray diffraction patterns showed the formation of PtAu alloy while transmission electron micrographs showed the particles sizes between 5.8 and 6.4nm. PtAu/C 70:30 presented the best results showing a current density about 20% higher when compared to Pt/C in voltammetry experiments and a power density about 60% higher than Pt/C using DAFC, while Au/C showed practically no activity in both experiments. The best results obtained with PtAu/C (70:30) could be explained by the electronic effect (PtAu alloy) associated with adsorbed hydroxyl species (AuOHads) and also the lower Au-N energy adsorption. (C) 2014 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 13/01577-0 - Development of materials and degradation studies of electrocatalysts and suports for alkaline fuel cell
Grantee:Júlio César Martins da Silva
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 12/03516-5 - OXIDES-C supported electrocatalysts for direct liquid fuel cell anodes
Grantee:Rodrigo Fernando Brambilla de Souza
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 12/22731-4 - Electrocatalysts supported in different substrates prepared by codeposition electrochemistry for direct liquid fuel cell (methanol , ethanol and formic acidic)
Grantee:Guilherme Soares Buzzo
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 11/18246-0 - Preparation of PD binary and ternary electrocatalysts by borohydride reduction for alcohol electro-oxidation in alkaline medium
Grantee:Almir Oliveira Neto
Support type: Regular Research Grants