期刊
ELECTROCATALYSIS
卷 8, 期 3, 页码 245-251出版社
SPRINGER
DOI: 10.1007/s12678-017-0360-3
关键词
P-doped carbon; Platinum; Ruthenium; Nanoparticles; Electrocatalysts; Methanol
资金
- CNPq [310051/2012-6]
- FAPESP [2014/09087-4]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [14/09087-4] Funding Source: FAPESP
P-doped carbon was prepared by thermal treatment of commercial carbon Vulcan XC72 with H3PO4 at 800 degrees C. PtRu nanoparticles were supported on carbon Vulcan XC72 (C) and on P-doped carbon (P-C) using an alcohol reduction process. The obtained materials were characterized by energy-dispersive X-ray spectroscopy, Raman spectroscopy, X-ray diffraction, transmission electron microscopy, and cyclic voltammetry. The performance of the electrocatalyst was evaluated for methanol electro-oxidation. The intensities of D-band and G-band of Raman spectra were different for P-doped carbon and carbon Vulcan XC72. X-ray diffraction of PtRu/C electrocatalyst showed that Pt face-centered cubic phase and Ru amorphous phase coexist in this material, while for PtRu/P-C electrocatalyst, it was observed the presence of PtRu alloy and Ru hexagonal close-packed phases. The use of P-doped carbon as support for PtRu nanoparticles improves the methanol electro-oxidation. This increase of activity could be attributed to a decrease of average nanoparticle sizes and/or more active Pt and Ru species resulting from metal-support interactions.
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