Elucidating the Hydrogen Selectivity of Pt/TiO_<i>x</i>/C as a Fuel-Cell Catalyst by Operando Near-Ambient-Pressure XPS.

ABSTRACT: The long-term stability of proton exchange membrane fuel cells (PEMFCs) faces significant challenges, particularly during start-up and shut-down events, which lead to degradation of the cathode catalyst through the oxidation of its carbon support. To improve catalyst durability, an anode catalyst with a high selectivity toward the hydrogen oxidation/evolution reaction rather than the oxygen reduction reaction is necessary. Pt/TiO_x/C (x < 2) catalysts have been reported to provide excellent hydrogen selectivity due to its strong metal-support interaction (SMSI) between Pt particles and TiO_x support. To further elucidate the SMSI-induced effect of the catalyst, this study employs near-ambient-pressure X-ray photoelectron spectroscopy (NAP-XPS) at BE

SUBMITTER: Tran Pham NL 

PROVIDER: S-EPMC12442003 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature