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説明:

Atomically dispersed Pt-group metals are promising as nanocatalysts because of their unique geometric structures and ultrahigh atomic utilization. However, loading isolated Pt-group metals in single-atom alloys (SAAs) with distinctive bimetallic sites is challenging. In this study, we present amorphous mesoporous Ni boride (Ni-B) as an ideal substrate to uniformly disperse Pt atoms with tunable loadings (1.7 to 12.2 wt %). The effect of the morphology, composition, and crystal phase of the Ni-B host on the growth and dispersion of Pt atoms is discussed. The resulting amorphous Pt-Ni-B mesoporous nanospheres exhibit superior electrocatalytic H2 evolution performance in acidic media. This strategy holds the potential to synthesize a diverse library of mesoporous amorphous Pt-group SAAs, by leveraging functional amorphous nanostructured 3d transition-metal borides as substrates, thereby proposing a comprehensive strategy to control atomically dispersed Pt-group metals.

権利情報:

• Creative Commons BY-NC Attribution-NonCommercial 4.0 International
  

キーワード: Atomic catalysts, Mesoporous, Single-atom alloy, Amorphous alloy, Electrocatalytic hydrogen evolution reaction

刊行年月日: 2024-06-21

出版者: American Association for the Advancement of Science (AAAS)

掲載誌:

• Science Advances (ISSN: 23752548) vol. 10 issue. 25 eado2442

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1126/sciadv.ado2442

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更新時刻: 2024-08-30 16:30:28 +0900

MDRでの公開時刻: 2024-08-30 16:30:29 +0900