Citation: Xiaxi Yao, Xiuli Hu, Fangcheng Huang, Xuhong Wang, Xuekun Hong, Dawei Wang. Improved hydrogen and oxygen evolution rates in Pt@TiO₂@RuO₂ hollow nanoshells through dielectric Mie resonance and spatial cocatalyst separation[J]. Chinese Chemical Letters, ;2025, 36(5): 110192. doi: 10.1016/j.cclet.2024.110192 shu

Improved hydrogen and oxygen evolution rates in Pt@TiO₂@RuO₂ hollow nanoshells through dielectric Mie resonance and spatial cocatalyst separation

Xiaxi Yao ^a ,
Xiuli Hu ^a ,
Fangcheng Huang ^{d, *,} ,
Xuhong Wang ^a ,
Xuekun Hong ^{b, *,} ,
Dawei Wang ^{c, *,}

a.
School of Materials Engineering, Changshu Institute of Technology, Changshu 215500, China
b.
School of Electronic Information Engineering, Changshu Institute of Technology, Changshu 215500, China
c.
Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
d.
Department of Information Engineering, Electronics, and Telecommunications, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Roma, Italy

fangcheng.huang@uniroma1.it

xkhong@cslg.edu.cn

dawei.wang@hhu.edu.cn

Received Date: 8 March 2024
Revised Date: 10 June 2024
Accepted Date: 27 June 2024
Available Online: 29 June 2024

Figures(3)

Photocatalytic overall water splitting is a promising method for producing clean hydrogen energy, but faces challenges such as low light utilization efficiency and high charge carrier recombination rates. This study demonstrates that dielectric Mie resonance in TiO₂ hollow nanoshells can enhance electric field intensity and increase light absorption through resonant energy transfer, compared to crushed TiO₂ nanoparticles. The Mie resonance effect was confirmed through fluorescence spectra, photo-response current measurements, photocatalytic water splitting experiments, and Mie calculation. The incident electric-field amplitude was doubled in hollow nanoshells, allowing for increased light trapping. Additionally, the spatially separated Pt and RuO₂ cocatalysts on the inner and outer surfaces facilitated the separation of photoinduced electrons and holes. Pt@TiO₂@RuO₂ hollow nanoshells exhibited superior photocatalytic water splitting performance, with a stable H₂ generation rate of 50.1 µmol g⁻¹ h⁻¹ and O₂ evolution rate of 25.1 µmol g⁻¹ h⁻¹, outperforming other nanostructures such as TiO₂, Pt@TiO₂, and TiO₂@RuO₂ hollow nanoshells. This study suggests that dielectric Mie resonance and spatially-separated cocatalysts offer a new approach to simultaneously enhance light absorption and charge carrier transfer in photocatalysis.
- Dielectric Mie resonance,
- Hollow nanoshells,
- Spatial charge separation,
- Overall water splitting,
- Photocatalysis
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通讯作者: 陈斌, bchen63@163.com

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Improved hydrogen and oxygen evolution rates in Pt@TiO2@RuO2 hollow nanoshells through dielectric Mie resonance and spatial cocatalyst separation

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通讯作者: 陈斌, bchen63@163.com

Improved hydrogen and oxygen evolution rates in Pt@TiO₂@RuO₂ hollow nanoshells through dielectric Mie resonance and spatial cocatalyst separation