催化作用
材料科学
石墨烯
兴奋剂
Atom(片上系统)
纳米技术
电化学
退火(玻璃)
金属
化学工程
化学物理
电极
光电子学
物理化学
化学
有机化学
计算机科学
工程类
冶金
复合材料
嵌入式系统
作者
Dong‐Ha Kim,Jun‐Hwe Cha,Sanggyu Chong,Su‐Ho Cho,Hamin Shin,Jaewan Ahn,Dogyeong Jeon,Jihan Kim,Sung‐Yool Choi,Il‐Doo Kim
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-10-06
卷期号:17 (23): 23347-23358
被引量:6
标识
DOI:10.1021/acsnano.3c02968
摘要
Single-atom catalysts feature interesting catalytic activity toward applications that rely on surface reactions such as electrochemical energy storage, catalysis, and gas sensors. However, conventional synthetic approaches for such catalysts require extended periods of high-temperature annealing in vacuum systems, limiting their throughput and increasing their production cost. Herein, we report an ultrafast flash-thermal shock (FTS)-induced annealing technique (temperature > 2850 °C, <10 ms duration, and ramping/cooling rates of ∼105 K/s) that operates in an ambient-air environment to prepare single-atom-stabilized N-doped graphene. Melamine is utilized as an N-doping source to provide thermodynamically favorable metal–nitrogen bonding sites, resulting in a uniform and high-density atomic distribution of single metal atoms. To demonstrate the practical utility of the single-atom-stabilized N-doped graphene produced by the FTS method, we showcased their chemiresistive gas sensing capabilities and electrocatalytic activities. Overall, the air-ambient, ultrafast, and versatile (e.g., Co, Ni, Pt, and Co–Ni dual metal) FTS method provides a general route for high-throughput, large area, and vacuum-free manufacturing of single-atom catalysts.
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