Core–shell structured PtCu/C applied in a high-temperature direct ethanol electroreformer to produce green H2 at reduced energy demand with high CO2 selectivity
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EES CATALYSIS
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Three different electrocatalysts have been prepared, characterized, and applied to a high-temperature
direct ethanol polymer electrolyte membrane electroreformer (DEPEME) based on the removal of
surface Cu from the initial PtxCu/C (x = 3, 1, and 1/3) raw materials. The resulting structure consisted of
a Pt-enriched shell on a PtCu alloy core deposited on C [alloyed PtxCu@PtyCu/C (y c x)], achieved after
the acid treatment of the prepared catalysts, in a core–shell (CS) configuration. This structure is confirmed
by X-ray diffraction, which evidences the formation of a PtCu alloy, whereas X-ray photoelectron
spectroscopy reveals an enriched Pt shell. Finally, transmission electron microscopy images revealed the
dispersed deposition of metal nanoparticles at the nanoscale range. Regarding the electrochemical
performance, the CS materials displayed enhanced CO tolerance and ethanol electro-oxidation (EEO)
performance, characterized by increased current density and a lower onset potential compared to Pt/C.
These results were corroborated at the high-temperature DEPEME condition of 150 1C. Moreover, the
monitoring of the EEO products revealed that the CS PtCu materials notably enhanced the selectivity for
CO2, resulting in a desirable combination of high hydrogen production rate (0.205 kg of H2 m 2 h 1)
and CO2 selectivity (close to 50%) at a reduced energy consumption (25.46 kWh kg H2
1). Finally, a
techno-economic analysis presents the potential of using ethanol produced in a sugarcane plant from
bagasse (second-generation) and estimates the cost of H2 produced compared to that of a PEM water
electrolyzer.
Como referenciar
PAULA, DRYADE F. de; CRISAFULLI, RUDY; GONZALES-COBOS, JESUS; CARAVACA, ANGEL; LINARES, JOSE J. Core–shell structured PtCu/C applied in a high-temperature direct ethanol electroreformer to produce green H2 at reduced energy demand with high CO2 selectivity: performance and techno-economic analyses. EES CATALYSIS, v. 4, n. 1, p. 213-229, 2026. DOI: 10.1039/d5ey00210a. Disponível em: https://repositorio.ipen.br/handle/123456789/49319. Acesso em: 26 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.