Hot Electrons Do the Impossible: Plasmon-Induced Dissociation of H2 on Au
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- 作者：Shaunak Mukherjee ; Florian Libisch ; Nicolas Large ; Oara Neumann ; Lisa V. Brown ; Jin Cheng ; J. Britt Lassiter ; Emily A. Carter ; Peter Nordlander ; Naomi J. Halas
- 刊名：Nano Letters
- 出版年：2013
- 出版时间：January 9, 2013
- 年：2013
- 卷：13
- 期：1
- 页码：240-247
- 全文大小：551K
- 年卷期：v.13,no.1(January 9, 2013)
- ISSN：1530-6992
文摘
Heterogeneous catalysis is of paramount importance in chemistry and energy applications. Catalysts that couple light energy into chemical reactions in a directed, orbital-specific manner would greatly reduce the energy input requirements of chemical transformations, revolutionizing catalysis-driven chemistry. Here we report the room temperature dissociation of H2 on gold nanoparticles using visible light. Surface plasmons excited in the Au nanoparticle decay into hot electrons with energies between the vacuum level and the work function of the metal. In this transient state, hot electrons can transfer into a Feshbach resonance of an H2 molecule adsorbed on the Au nanoparticle surface, triggering dissociation. We probe this process by detecting the formation of HD molecules from the dissociations of H2 and D2 and investigate the effect of Au nanoparticle size and wavelength of incident light on the rate of HD formation. This work opens a new pathway for controlling chemical reactions on metallic catalysts.