在二维MoS2晶体上稳定的半导体Pt结构实现了超快析氢。

IF 27.4 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Materials Pub Date : 2025-06-26 DOI:10.1002/adma.202504113

Tamás Ollár,Péter Vancsó,Péter Kun,Antal A Koós,Gergely Dobrik,Ekaterina V Sukhanova,Zakhar I Popov,Miklós Németh,Krisztina Frey,Béla Pécz,Péter Nemes-Incze,Chanyong Hwang,József Sándor Pap,Levente Tapasztó

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引用次数: 0

摘要

金属铂是最好的和被广泛研究的析氢催化剂，但对其半导体形式的铂知之甚少。本研究表明，厚度仅为两个原子层（0.4 nm）的半导体Pt结构可以稳定在二维MoS2晶体上。将铂粒子的厚度减小到费米波长（0.5 nm）以下，会在其电子结构中打开一个相当大的（0.3-0.4 eV）间隙。所得到的电子结构与较大的Pt纳米颗粒的金属能带和Pt单原子催化剂的原子轨道在性质上不同，但表现出最高的本构活性。与单原子Pt催化剂相比，半导体Pt双分子层的产氢速率（≈1400 H2 s-1 @ η = 100 mV）提高了10倍，并且在Pt负载低3个数量级的情况下，其活性与商业Pt纳米颗粒（Pt /C催化剂）相当。

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Semiconducting Pt Structures Stabilized on 2D MoS2 Crystals Enable Ultrafast Hydrogen Evolution.

Metallic platinum is the best and most widely investigated catalyst for hydrogen evolution, yet little is known about Pt in its semiconducting form. Here, it is shown that semiconducting Pt structures with a thickness of only two atomic layers (0.4 nm) can be stabilized on 2D MoS2 crystals. Reducing the thickness of Pt particles below the Fermi wavelength (0.5 nm) opens a sizeable (0.3-0.4 eV) gap in their electronic structure. The resulting electronic structure is qualitatively different from both the metallic bands of larger Pt nanoparticles and the atomic orbitals of Pt single atom catalysts while displaying the highest intrinsic activity among them. Semiconducting Pt bilayers enable H2 production at ten times higher rates (≈1400 H2 s-1 @ η = 100 mV) than Pt single atom catalysts, and match the activity of commercial Pt nanoparticles (Pt /C catalysts) at three orders of magnitude lower Pt loadings.

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来源期刊

Advanced Materials 工程技术-材料科学：综合

CiteScore

43.00

自引率

4.10%

发文量

2182

审稿时长

2 months

期刊介绍： Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.