光催化
催化作用
材料科学
载流子
等离子体子
氢
光化学
纳米结构
热电子
屏障激活
分解
光电子学
热的
电子
化学
化学物理
纳米技术
物理
有机化学
气象学
量子力学
生物化学
作者
Linan Zhou,Dayne F. Swearer,Chao Zhang,Hossein Robatjazi,Hangqi Zhao,Luke Henderson,Liangliang Dong,Phillip Christopher,Emily A. Carter,Peter Nordlander,Naomi J. Halas
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2018-10-05
卷期号:362 (6410): 69-72
被引量:778
标识
DOI:10.1126/science.aat6967
摘要
Photocatalysis based on optically active, "plasmonic" metal nanoparticles has emerged as a promising approach to facilitate light-driven chemical conversions under far milder conditions than thermal catalysis. However, an understanding of the relation between thermal and electronic excitations has been lacking. We report the substantial light-induced reduction of the thermal activation barrier for ammonia decomposition on a plasmonic photocatalyst. We introduce the concept of a light-dependent activation barrier to account for the effect of light illumination on electronic and thermal excitations in a single unified picture. This framework provides insight into the specific role of hot carriers in plasmon-mediated photochemistry, which is critically important for designing energy-efficient plasmonic photocatalysts.
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