Mapping Hot Electron Response of Individual Gold Nanocrystals on a TiO2 Photoanode

Nano Letters
Zhu HaifeiWeihai Ni

Abstract

Incorporating metal nanocrystals with semiconductor photoanodes significantly enhances the efficiency of the energy conversion in the visible range during water splitting, due to the excitation of hot electrons. While extensively studied on ensemble samples, hot electron response of metal nanocrystals in a photoelectrochemical cell remains unexploited at the single-particle level. Herein, we systematically investigate hot electron response of individual single-crystalline gold nanocrystals (AuNCs) on a TiO2 photoanode during water splitting. We directly correlate the morphology of the AuNC and its plasmonic property to the efficiencies involving hot electrons with the help of single-particle dark field microscopy (DFM) and photocurrent mapping (PCM). Our results show the efficiencies of individual AuNCs are dependent on a variety of factors including interface condition, applied bias, excitation power, incident angle, and AuNC size. Our research may shed light on optimizing the light-harvesting capability of metal/semiconductor photoanodes by providing insights into the photocatalytic processes.

References

Feb 28, 2002·Physical Review Letters·C SönnichsenP Mulvaney
Mar 18, 2005·Journal of the American Chemical Society·Tsutomu Hirakawa, Prashant V Kamat
May 19, 2005·Journal of the American Chemical Society·Yang Tian, Tetsu Tatsuma
Nov 13, 2007·Journal of the American Chemical Society·Akihiro FurubeMasanori Tachiya
Mar 26, 2011·Chemical Reviews·Gregory V Hartland
May 10, 2011·Science·Mark W KnightNaomi J Halas
Jul 14, 2011·Nano Letters·Isabell ThomannMark L Brongersma
Aug 25, 2012·Nano Letters·Joun LeeMartin Moskovits
Oct 22, 2013·Nature Nanotechnology·A GiugniE Di Fabrizio
Jun 25, 2014·ACS Nano·Alejandro ManjavacasPeter Nordlander
Dec 30, 2014·Journal of the American Chemical Society·Zhaoke ZhengTetsuro Majima
Mar 31, 2015·Physical Chemistry Chemical Physics : PCCP·Lei ShaoHai-Qing Lin
Nov 21, 2015·Nanoscale·Junwei ZhaoWeihai Ni
Jan 26, 2016·Journal of the American Chemical Society·Binghui WuGalen D Stucky
Mar 17, 2017·ACS Nano·Benjamin FoersterCarsten Sönnichsen
Feb 23, 2019·Nano Letters·Evangelina PensaStefan A Maier

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Citations

Feb 24, 2021·Analytical Chemistry·Peng Fei GaoCheng Zhi Huang
Apr 1, 2021·Accounts of Chemical Research·Stephen A Lee, Stephan Link
May 13, 2021·Advanced Materials·Yuchao ZhangWei David Wei

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