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Title: Surface Plasmon-Driven Water Reduction: Gold Nanoparticle Size Matters

Abstract

Water reduction under two visible light ranges (λ > 400 and λ > 435 nm) was investigated using gold-loaded titanium dioxide (Au-TiO2) with different sizes of Au nanoparticles (NPs). Two different mechanisms have been determined to clarify the specific role of Au NPs in visible light-induced photocatalytic reactions. Our study provides solid evidences showing that Au NPs sizes are essential for the surface plasmon-driven water reduction under λ > 435 nm. More specifically, we have demonstrated that the Au NPs sizes are vital for the SPR mediated electron transfer efficiency and play a critical role in determining the reduction potential of the transferred electrons in the TiO2 conduction band (CB) and their following activities. Our discovery provides a facile way to manipulate the reduction potential of transferred electrons by simply varying the Au NPs sizes, which will greatly facilitate the design of suitable plasmonic photocatalysts for water reduction and other valuable solar-to-fuel reactions.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1172453
Report Number(s):
PNNL-SA-101782
40065; KP1704020
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of the American Chemical Society, 136(28):9842-9845
Country of Publication:
United States
Language:
English
Subject:
Environmental Molecular Sciences Laboratory

Citation Formats

Qian, Kun, Sweeny, Brendan C., Johnston-Peck, Aaron C., Niu, Wenxin, Graham, Jeremy O., DuChene, Joseph S., Qiu, Jingjing, Wang, Yi-Chung, Engelhard, Mark H., Su, Dong, Stach, Eric A., and Wei, Wei. Surface Plasmon-Driven Water Reduction: Gold Nanoparticle Size Matters. United States: N. p., 2014. Web. doi:10.1021/ja504097v.
Qian, Kun, Sweeny, Brendan C., Johnston-Peck, Aaron C., Niu, Wenxin, Graham, Jeremy O., DuChene, Joseph S., Qiu, Jingjing, Wang, Yi-Chung, Engelhard, Mark H., Su, Dong, Stach, Eric A., & Wei, Wei. Surface Plasmon-Driven Water Reduction: Gold Nanoparticle Size Matters. United States. doi:10.1021/ja504097v.
Qian, Kun, Sweeny, Brendan C., Johnston-Peck, Aaron C., Niu, Wenxin, Graham, Jeremy O., DuChene, Joseph S., Qiu, Jingjing, Wang, Yi-Chung, Engelhard, Mark H., Su, Dong, Stach, Eric A., and Wei, Wei. Wed . "Surface Plasmon-Driven Water Reduction: Gold Nanoparticle Size Matters". United States. doi:10.1021/ja504097v.
@article{osti_1172453,
title = {Surface Plasmon-Driven Water Reduction: Gold Nanoparticle Size Matters},
author = {Qian, Kun and Sweeny, Brendan C. and Johnston-Peck, Aaron C. and Niu, Wenxin and Graham, Jeremy O. and DuChene, Joseph S. and Qiu, Jingjing and Wang, Yi-Chung and Engelhard, Mark H. and Su, Dong and Stach, Eric A. and Wei, Wei},
abstractNote = {Water reduction under two visible light ranges (λ > 400 and λ > 435 nm) was investigated using gold-loaded titanium dioxide (Au-TiO2) with different sizes of Au nanoparticles (NPs). Two different mechanisms have been determined to clarify the specific role of Au NPs in visible light-induced photocatalytic reactions. Our study provides solid evidences showing that Au NPs sizes are essential for the surface plasmon-driven water reduction under λ > 435 nm. More specifically, we have demonstrated that the Au NPs sizes are vital for the SPR mediated electron transfer efficiency and play a critical role in determining the reduction potential of the transferred electrons in the TiO2 conduction band (CB) and their following activities. Our discovery provides a facile way to manipulate the reduction potential of transferred electrons by simply varying the Au NPs sizes, which will greatly facilitate the design of suitable plasmonic photocatalysts for water reduction and other valuable solar-to-fuel reactions.},
doi = {10.1021/ja504097v},
journal = {Journal of the American Chemical Society, 136(28):9842-9845},
number = ,
volume = ,
place = {United States},
year = {Wed Jul 16 00:00:00 EDT 2014},
month = {Wed Jul 16 00:00:00 EDT 2014}
}