期刊
ACS ENERGY LETTERS
卷 6, 期 6, 页码 2305-2312出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.1c00990
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资金
- National Research Foundation (NRF) of Korea - Ministry of Science and ICT [NRF-2019R1A2C1003429, NRF-2017R1A2B3006651, 2020M3H7A1096344]
- Ministry of Education [NRF-2018R1A6A1A03024231]
- GRRC program of Gyeonggi province [Hydrogen Energy Full Cycle Core Material Research Center] [GRRCHanyang2020-A01]
The core structure of gold nanoclusters has a significant impact on their photoelectrochemical behavior on TiO2, and subtle manipulation of the core structure can greatly improve their performance, highlighting an overlooked aspect in the past.
Ultrasmall gold nanoclusters (Au NCs) have recently gained enormous popularity as a newly emerging light harvester, but many fundamental aspects of their photoelectrochemical behavior are still largely unknown. Unlike traditional photoactive nanoparticles, the NC's core structure, rather than its size, is a key factor that dictates the physical properties of NCs because of a strong quantum confinement effect. Despite this importance, no effort has been made to elucidate the effect of the core structure on the photoelectrochemistry of Au NC-sensitized TiO2 (Au NC-TiO2). Using Au-25 NC as a model system, we delicately tailored the icosahedral Au-15 core of Au-25 NC into a cuboctahedral Au is core of Au-23 NC. This subtle core manipulation has a drastic impact on the entire interfacial behavior of Au NC-TiO2, which in turn significantly affects the photoelectrochemical performance. This new insight highlights the overlooked effect of the core structure on the photoelectrochemistry of Au NC-TiO2.
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