利用配体和成分效应：形态可定制的 Pt-Bi 双金属气凝胶用于增强（光）电催化,Small

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利用配体和成分效应：形态可定制的 Pt-Bi 双金属气凝胶用于增强（光）电催化
Small ( IF 13.0 ) Pub Date : 2023-05-13 , DOI: 10.1002/smll.202301288
Geng Xue ₁ , Yueqi Li ₂ , Ran Du ₂ , Jinying Wang ₃ , René Hübner ₄ , Meng Gao ₁ , Yue Hu ₁

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金属气凝胶（MA）是新兴的多孔材料，在催化、传感、等离子体技术等方面显示出前所未有的潜力。然而，对其纳米构件（NBB）缺乏有效的调控仍然是阻碍深入研究和发展的一大障碍。性能增强。在这里，通过协调成分和配体效应，通过轻松调整金属前体和所应用的配体，可以获得具有受控尺寸和形状的NBB的Pt基和Bi基单金属和双金属气凝胶。特别是，通过调节催化活性Pt组分和半导体Bi组分的含量进一步调节气凝胶的电子和光学性能，可以控制Pt-Bi气凝胶的电催化和光电催化性能。有鉴于此，在甲醇电氧化方面获得了令人印象深刻的催化性能，在紫外线照射下的质量活性比商业 Pt/C 高 6.4 倍。这项研究不仅揭示了原位操纵 MAs 的 NBB，而且还为制备高性能的 MAs 基电催化剂和光电催化剂以实现与能量相关的电化学过程提供了指导。

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Leveraging Ligand and Composition Effects: Morphology-Tailorable Pt–Bi Bimetallic Aerogels for Enhanced (Photo-)Electrocatalysis

Metal aerogels (MAs) are emerging porous materials displaying unprecedented potential in catalysis, sensing, plasmonic technologies, etc. However, the lack of efficient regulation of their nano-building blocks (NBBs) remains a big hurdle that hampers the in-depth investigation and performance enhancement. Here, by harmonizing composition and ligand effects, Pt- and Bi-based single- and bimetallic aerogels bearing NBBs of controlled dimensions and shapes are obtained by facilely tuning the metal precursors and the applied ligands. Particularly, by further modulating the electronic and optic properties of the aerogels via adjusting the content of the catalytically active Pt component and the semiconducting Bi component, both the electrocatalytic and photoelectrocatalytic performance of the Pt–Bi aerogels can be manipulated. In this light, an impressive catalytic performance for electro-oxidation of methanol is acquired, marking a mass activity of 6.4-fold higher under UV irradiation than that for commercial Pt/C. This study not only sheds light on in situ manipulating NBBs of MAs, but also puts forward guidelines for crafting high-performance MAs-based electrocatalysts and photoelectrocatalysts toward energy-related electrochemical processes.

更新日期：2023-05-13

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