Optimal metal domain size for photocatalysis with hybrid semiconductor-metal nanorods

Nature Communications
Yuval Ben-ShaharUri Banin

Abstract

Semiconductor-metal hybrid nanostructures offer a highly controllable platform for light-induced charge separation, with direct relevance for their implementation in photocatalysis. Advances in the synthesis allow for control over the size, shape and morphology, providing tunability of the optical and electronic properties. A critical determining factor of the photocatalytic cycle is the metal domain characteristics and in particular its size, a subject that lacks deep understanding. Here, using a well-defined model system of cadmium sulfide-gold nanorods, we address the effect of the gold tip size on the photocatalytic function, including the charge transfer dynamics and hydrogen production efficiency. A combination of transient absorption, hydrogen evolution kinetics and theoretical modelling reveal a non-monotonic behaviour with size of the gold tip, leading to an optimal metal domain size for the most efficient photocatalysis. We show that this results from the size-dependent interplay of the metal domain charging, the relative band-alignments, and the resulting kinetics.

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Citations

Aug 31, 2016·Topics in Current Chemistry·Yuval Ben-Shahar, Uri Banin
Feb 15, 2017·Chemical Communications : Chem Comm·Jiajia Ning, Uri Banin
Apr 5, 2016·Chemical Society Reviews·Kaifeng Wu, Tianquan Lian
Jul 22, 2016·Faraday Discussions·Joshua G HinmanCatherine J Murphy
Apr 21, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Vincenzo AmendolaMaria Antonia Iatì
Oct 18, 2019·Chemical Communications : Chem Comm·Benjin JinXun Hong
Mar 13, 2019·Nature Communications·Xinyu HuangMin Xiao
Nov 1, 2017·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Jin-Xuan FanXian-Zheng Zhang
Oct 30, 2016·Proceedings of the National Academy of Sciences of the United States of America·Nikolay KornienkoPeidong Yang
Sep 16, 2020·Chemistry, an Asian Journal·Minhua AiJi-Jun Zou
Dec 10, 2020·Chemical Society Reviews·Christine Kranz, Maria Wächtler
Jan 29, 2021·Chemical Communications : Chem Comm·Rebeckah BurkeTodd D Krauss
Jan 28, 2021·The Journal of Chemical Physics·Rebeckah BurkeTodd D Krauss
Mar 30, 2021·ACS Applied Materials & Interfaces·Guodong YangSong Bai
Apr 20, 2019·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·S S Gupta, M A van Huis
Dec 4, 2019·The Journal of Physical Chemistry Letters·Seryio SarisRaffaella Buonsanti
Jul 17, 2020·Journal of the American Chemical Society·Junhui WangKaifeng Wu
Nov 30, 2019·ACS Applied Materials & Interfaces·Exian LiuJianbo Gao
Jul 28, 2019·Nano Letters·Duncan T L AlexanderVincenzo Amendola
Dec 10, 2016·ACS Applied Materials & Interfaces·Wei-Hao LinYung-Jung Hsu

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Methods Mentioned

BETA
transmission electron microscopy

Software Mentioned

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