In situ ATR-FTIR studies of ethanol electro-oxidation in alkaline medium on PtRh/C electrocatalyst prepared by an alcohol reduction process
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Electrocatalysis
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Anion exchange membrane fuel cell is a new
chance to produce a functional and portable fuel cell;
however, the studies are still at an early stage with few
reports regarding the AEMFC. PtRh/C electrocatalysts
with different Pt:Rh atomic ratios were prepared by an
alcohol reduction process. X-ray diffraction patterns for
all PtRh/C materials indicated no shift in Pt(fcc) peaks
showing that Rh did not incorporated into Pt lattice;
however, the analysis of lattice parameter showed that
some Pt atoms are added to Rh(fcc) structure. The
mean particle sizes were in the range of 4–5 nm.
Electrochemical experiments showed that PtRh/C
electrocatalyst with Pt:Rh atomic ratio of 70:30 had
superior performance exhibiting a current density of
5.0 mA mgmetal−1
. From in situ ATR-FTIR experiments,
it was observed that PtRh/C electrocatalyst with Pt:Rh
atomic ratio of 70:30 produced more acetate ions than
other ones, while the material prepared with Pt:Rh
atomic ratio of 50:50 was more selective to CO2 as observed
in acid media.
Como referenciar
FONTES, E.H.; SILVA, SIRLANE G. da; SPINACE, E.V.; NETO, A.O.; SOUZA, R.F.B. de. In situ ATR-FTIR studies of ethanol electro-oxidation in alkaline medium on PtRh/C electrocatalyst prepared by an alcohol reduction process. Electrocatalysis, v. 7, n. 4, p. 297-304, 2016. DOI: 10.1007/s12678-016-0308-z. Disponível em: http://repositorio.ipen.br/handle/123456789/26472. Acesso em: 30 Dec 2025.
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