期刊
ACS CATALYSIS
卷 7, 期 7, 页码 4360-4365出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.7b01318
关键词
nanoparticle; LSPR; plasmon resonance; photocatalysis; artificial photosynthesis; Marcus theory; self-assembled monolayer; plasmonic catalysis
资金
- National Science Foundation [NSF CHE-1455011]
- Springborn postdoctoral fellowship
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1455011] Funding Source: National Science Foundation
This work provides a mechanistic understanding of hot-electron-based catalysis on Au nanoparticles (NPs) induced under plasmonic excitation. Plasmon excitation-induced hot-electron transfer from an Au NP (donor) to a ferricyanide anion (acceptor) was studied as a function of the donor acceptor distance set by a thiolate-based self-assembled monolayer (SAM). Hot-electron-transfer rates and activation barrier heights were measured as a function of the donor acceptor distance, up to 20 A. Hot-electron transfer was found to be longer range than anticipated. The distance-dependent kinetics reveal that the hot-electron transfer takes place via multistep hopping in a wire-like manner across the insulating ligands, quite unlike the tunneling-dominated electron transfer known to take place across SAMs in the absence of plasmonic excitation. Field-assisted electron hopping may play a crucial role in hot-electron extraction and catalysis involving plasmon-excited NPs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据