Ambient Synthesis of Pt-Reactive Metal Alloy and High-Entropy Alloy Nanocatalysts Utilizing Hydrogen Cold Plasma
Ambient Synthesis of Pt-Reactive Metal Alloy and High-Entropy Alloy Nanocatalysts Utilizing Hydrogen Cold Plasma
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DOI：
10.1021/acs.chemmater.1c03389
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发表时间：
2021-12
影响因子：
8.6
通讯作者：
Dezhen Wu;Libo Yao;Michael Ricci;Jialu Li;Rongxuan Xie;Zhenmeng Peng
中科院分区：
文献类型：
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作者：
Dezhen Wu;Libo Yao;Michael Ricci;Jialu Li;Rongxuan Xie;Zhenmeng Peng
由于铂和活性金属前体之间还原电位的巨大差异以及活性金属的亲氧性质，铂-活性金属合金（Pt-RMA）及其高熵合金（Pt-HEA）纳米颗粒的合成具有挑战性。本文中，我们利用氢冷等离子体在环境条件下合成各种Pt-RMA（Pt-Cr，Pt-Ta，Pt-V，Pt-Fe和Pt-Al）和Pt-HEA（Pt-Cr-Ta-V-Fe-Al）纳米颗粒。该方法的有效性归因于氢等离子体中氢阴离子的产生，具有极强的还原能力，其标准还原电位为−2.3 V，可以同时还原Pt和活性金属前体。合成的纳米颗粒的特征在于确认合金形成，并研究了甲醇氧化反应中的催化性能，与商业Pt相比，具有改善的活性和耐久性。本研究为合成Pt-RMA和Pt-HEA纳米粒子提供了一种有效、通用的方法，为研究这类纳米材料提供了一个新的平台。
Synthesis of platinum-reactive metal alloy (Pt-RMA) and its high-entropy alloy (Pt-HEA) nanoparticles is challenging due to the huge difference in reduction potentials between Pt and reactive metal precursors and the oxyphilic nature of reactive metals. Herein, we utilize hydrogen cold plasma to synthesize a variety of Pt-RMA (Pt–Cr, Pt–Ta, Pt–V, Pt–Fe, and Pt–Al) and Pt-HEA (Pt–Cr–Ta–V–Fe–Al) nanoparticles under ambient conditions. Effectiveness of the method is attributed to the generation of hydrogen anions in hydrogen plasma, possessing extremely strong reducing ability with its −2.3 V standard reduction potential that can simultaneously reduce Pt and reactive metal precursors. The synthesized nanoparticles are characterized for confirming the alloy formation and are studied for the catalytic properties in the methanol oxidation reaction, with improved activity and durability compared to commercial Pt. This study provides an effective, universal method to synthesize Pt-RMA and Pt-HEA nanoparticles, which offers a new platform for studying this group of nanomaterials.