p-d Orbital Hybridization Induced by a Monodispersed Ga Site on a Pt3Mn Nanocatalyst Boosts Ethanol Electrooxidation
Angewandte Chemie (International ed. in English)(2022)
Abstract
Constructing monodispersed metal sites in heterocatalysis is an efficient strategy to boost their catalytic performance. Herein, a new strategy using monodispersed metal sites to tailor Pt-based nanocatalysts is addressed by engineering unconventional p-d orbital hybridization. Thus, monodispersed Ga on Pt3Mn nanocrystals (Ga-O-Pt3Mn) with high-indexed facets was constructed for the first time to drive ethanol electrooxidation reaction (EOR). Strikingly, the Ga-O-Pt3Mn nanocatalyst shows an enhanced EOR performance with achieving 8.41 times of specific activity than that of Pt/C. The electrochemical in situ Fourier transform infrared spectroscopy results and theoretical calculations disclose that the Ga-O-Pt3Mn nanocatalyst featuring an unconventional p-d orbital hybridization not only promote the C-C bond-breaking and rapid oxidation of -OH of ethanol, but also inhibit the generation of poisonous CO intermediate species. This work discloses a promising strategy to construct a novel nanocatalysts tailored by monodispersed metal site as efficient fuel cell catalysts.
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Key words
Ethanol Electrooxidation,Ga-O-Pt3Mn Nanocatalyst,High-Indexed Facets,Monodispersed Metal Site,Orbital Hybridization
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