Engineering composition-varied Au/PtTe hetero-junction-abundant nanotrough arrays as robust electrocatalysts for ethanol electrooxidation

Composition-varied Au/PtTe hetero-junction-abundant nanostructures are fabricated by combining interfacial self-assembly and interface-confined transformation strategy, and can be directly used as electrocatalysts of boosting ethanol electrooxidation. [Display omitted] Pt-based multi-metallic electr...

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Bibliographic Details
Published in:Journal of colloid and interface science 2023-09, Vol.646, p.616-624
Main Authors: Geng, Wen-Chao, Li, Jing-Jing, Sang, Ji-Long, Xia, Yu-Xin, Li, Yong-Jun
Format: Article
Language:English
Subjects:
Au/PtTe nanotrough array
Electrocatalyst
Ethanol electrooxidation
Hetero-junction
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Summary:Composition-varied Au/PtTe hetero-junction-abundant nanostructures are fabricated by combining interfacial self-assembly and interface-confined transformation strategy, and can be directly used as electrocatalysts of boosting ethanol electrooxidation. [Display omitted] Pt-based multi-metallic electrocatalysts containing hetero-junctions are found to have superior catalytic performance to composition-equivalent counterparts. However, in bulk solution, controllable preparation of Pt-based hetero-junction electrocatalyst is an extremely random work owing to the complexity of solution reactions. Herein, we develop an interface-confined transformation strategy, subtly achieving Au/PtTe hetero-junction-abundant nanostructures by employing interfacial Te nanowires as sacrificing templates. By controlling the reaction conditions, composition-varied Au/PtTe can be easily obtained, such as Au75/Pt20Te5, Au55/Pt34Te11, and Au5/Pt69Te26. Moreover, each Au/PtTe hetero-junction nanostructure appears to be an array consisting of side-by-side Au/PtTe nanotrough units and can be directly used as a catalyst layer without further post-treatment. All Au/PtTe hetero-junction nanostructures show better catalytic activity towards ethanol electrooxidation than commercial Pt/C because of the combining contributions of Au/Pt hetero-junctions and the collective effects of multi-metallic elements, where Au75/Pt20Te5 exhibits the best electrocatalytic performance among three Au/PtTe nanostructures owing to its optimal composition. This study may provide technically feasible guidance for further maximizing the catalytic activity of Pt-based hybrid catalysts.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2023.05.025