High-loading Au nanoparticles on carbon by engineering surface charge and specific surface area of substrates

IF 4.8 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Xue Deng, Siyang Wang, Qianqian Ren, Xintong Yan, Wenbo Zhao, Jianzhong Cui, Shi Hu
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Abstract

Energy transition towards net-zero society calls for utilization of renewable power to drive CO2 conversion in an efficient electrochemical way. The development of a commercial CO2 electrolyzer with positive tech-eco effect calls for active and durable electrocatalysts. High-loading gold on carbon (Au/C) with reduced particle size is the prerequisite for the highly-selective and highly energy-efficient CO production in such a CO2 electrolyzer, but a scalable synthetic method is missing. With combined control of ligand, substrate and pH value, Au/C catalysts with particle size within 5 ​nm and metal loading of 40 ​wt% and 60 ​wt% are synthesized on low and high surface-area carbon, respectively. We also provide a thorough investigation of the effect of the ligand type, surface charge of gold nanoparticles (Au NPs) and surface area of carbon substrate on the loading limit of Au/C.

Abstract Image

通过设计基底的表面电荷和比表面积,在碳上实现高负载金纳米粒子
向零净社会的能源转型要求利用可再生能源,以高效的电化学方式推动二氧化碳转化。要开发出具有积极技术生态效应的商用二氧化碳电解槽,就必须使用活性持久的电催化剂。颗粒尺寸更小的高负载碳化金(Au/C)是在这种二氧化碳电解槽中实现高选择性和高能效二氧化碳生产的先决条件,但目前还缺少一种可扩展的合成方法。通过对配体、底物和 pH 值的综合控制,我们在低比表面积碳和高比表面积碳上合成了粒径在 5 纳米以内、金属负载量分别为 40 wt% 和 60 wt% 的 Au/C 催化剂。我们还深入研究了配体类型、金纳米颗粒(Au NPs)表面电荷和碳基底表面积对 Au/C 负载极限的影响。
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来源期刊
CiteScore
8.60
自引率
2.10%
发文量
2812
审稿时长
49 days
期刊介绍: Progress in Natural Science: Materials International provides scientists and engineers throughout the world with a central vehicle for the exchange and dissemination of basic theoretical studies and applied research of advanced materials. The emphasis is placed on original research, both analytical and experimental, which is of permanent interest to engineers and scientists, covering all aspects of new materials and technologies, such as, energy and environmental materials; advanced structural materials; advanced transportation materials, functional and electronic materials; nano-scale and amorphous materials; health and biological materials; materials modeling and simulation; materials characterization; and so on. The latest research achievements and innovative papers in basic theoretical studies and applied research of material science will be carefully selected and promptly reported. Thus, the aim of this Journal is to serve the global materials science and technology community with the latest research findings. As a service to readers, an international bibliography of recent publications in advanced materials is published bimonthly.
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