A universal and scalable transformation of bulk metals into singleatom catalysts in ionic liquids

• 成果类型: Article
• 署名作者: Wang, Shujuan; Lu, Minghui; Xia, Xuewen; Wang, Fei; Xiong, Xiaolu; Ding, Kai; Pang, Zhongya; Li, Guangshi; Xu, Qian; Hsu, Hsien-Yi; Hu, Shen; Ji, Li; Zhao, Yufeng; Wang, Jing; Zou, Xingli; Lu, Xionggang
• 署名单位: Shanghai University; Shanghai University; Shanghai University; Chinese Academy of Sciences; Shanghai Institute of Applied Physics, CAS; City University of Hong Kong; Fudan University; Shanghai University; Yanshan University
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-14226
• DOI: 10.1073/pnas.2319136121
• 发表日期: 2024-03-05
• 关键词: efficient hydrogen evolution; oxygen reduction; platinum atoms; stable single; co oxidation; sites; electrodeposition; graphene; bubbles

摘要

Single - atom catalysts (SACs) with maximized metal atom utilization and intriguing properties are of utmost importance for energy conversion and catalysis science. However, the lack of a straightforward and scalable synthesis strategy of SACs on diverse support materials remains the bottleneck for their large - scale industrial applications. Herein, we report a general approach to directly transform bulk metals into single atoms through the precise control of the electrodissolution-electrodeposition kinetics in ionic liquids and demonstrate the successful applicability of up to twenty different monometallic SACs and one multimetallic SAC with five distinct elements. As a case study, the atomically dispersed Pt was electrodeposited onto Ni3N/Ni- Co- graphene oxide heterostructures in varied scales (up to 5 cm x 5 cm) as bifunctional catalysts with the electronic metal-support interaction, which exhibits low overpotentials at 10 mA cm-2 for hydrogen evolution reaction (HER, 30 mV) and oxygen evolution reaction (OER, 263 mV) with a relatively low Pt loading (0.98 wt%). This work provides a simple and practical route for large - scale synthesis of various SACs with favorable catalytic properties on diversified supports using alternative ionic liquids and inspires the methodology on precise synthesis of multimetallic singleatom materials with tunable compositions.