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journal article·2024-10Open access

Discovery of Self‐Assembled 2D Ru/Si Superlattices Boosting Hydrogen Evolution

Weizheng Cai, Xinyi He, Tian‐Nan Ye, Xinmeng Hu, Chuanlong Liu, Masato Sasase, Masaaki Kitano, Toshio Kamiya, Hideo Hosono, Jiazhen Wu

Small· Volume 20· Issue 42
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Source abstract

Abstract

Abstract 2D heterostructuring is a versatile methodology for designing nanoarchitecture catalytic systems that allow for reconstruction and modulation of interfaces and electronic structures. However, catalysts with such structures are extremely scarce due to limited synthetic strategies. Here, a highly ordered 2D Ru/Si/Ru/Si… nano‐heterostructures (RSHS) is reported by acid etching of the LaRuSi electride. RSHS shows a superior electrocatalytic activity for hydrogen evolution with an overpotential of 14 mV at 10 mA cm −2 in alkaline media. Both experimental analyses and first‐principles calculations demonstrate that the electronic states of Ru can be tuned by strong interactions of the interfacial Ru–Si, leading to an optimized hydrogen adsorption energy. Moreover, due to the synergistic effect of Ru and Si, the energy barrier of water dissociation is significantly reduced. The well‐organized superlattice structure will provide a paradigm for construction of efficient catalysts with tunable electronic states and dual active sites.
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Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced Photocatalysis Techniques · MXene and MAX Phase Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Shenzhen Key Laboratory of Micro/Nano‐Porous Functional Materials Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen 518055 China

MDX Research Center for Element Strategy International Research Frontiers Initiative Tokyo Institute of Technology Yokohama 226‐8503 Japan

Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 China

Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices Southern University of Science and Technology Shenzhen 518055 China

Institute of Innovative Materials Southern University of Science and Technology Shenzhen 518055 China

Funding

National Natural Science Foundation of China · JST-Mirai Program

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