材料科学
光催化
合金
辐照
贵金属
纳米颗粒
金属
吉布斯自由能
纳米技术
化学工程
冶金
催化作用
热力学
有机化学
化学
工程类
物理
核物理学
作者
Haowei Huang,Jiwu Zhao,Hele Guo,Bo Weng,Hongwen Zhang,Rafikul Ali Saha,Menglong Zhang,Feili Lai,Yufan Zhou,Roberto Juan,Pengcheng Chen,Sibo Wang,Julian A. Steele,Fulan Zhong,Tianxi Liu,Johan Hofkens,You‐Xuan Zheng,Jinlin Long,Maarten B. J. Roeffaers
标识
DOI:10.1002/adma.202313209
摘要
Metal nanoparticle cocatalysts are widely investigated for their ability to enhance the performance of photocatalytic materials, however their practical application is often limited by the inherent instability under light irradiation. This challenge has catalyzed interest in exploring high-entropy alloys (HEAs), which, with their increased entropy and lower Gibbs free energy, provide superior stability. In this study, we successfully synthesized 3.5 nm sized noble-metal-free nanoparticles (NPs) composed of a FeCoNiCuMn HEA. With theoretic calculation and experiments, the electronic structure of HEA in augmenting the catalytic CO2 reduction has been uncovered, including the individual roles of each element and the collective synergistic effects. We then investigated their photocatalytic CO2 reduction capabilities when immobilized on TiO2. HEA NPs significantly enhanced the CO2 photoreduction, achieving a 23-fold increase over pristine TiO2, with CO and CH4 production rates of 235.2 µ mol g-1 h-1 and 19.9 µ mol g-1 h-1, respectively. Meanwhile, HEA NPs showed excellent stability under simulated solar irradiation, as well high-energy X-ray irradiation. This research emphasizes the promising role of HEA nanoparticles, composed of earth-abundant elements, in revolutionizing the field of photocatalysis. This article is protected by copyright. All rights reserved.
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