Temperature-induced variations in photocatalyst properties and photocatalytic hydrogen evolution: Differences in UV, visible, and infrared radiation
Authors/Creators
Xiaojie Li
Jingkai Lin
Jiaquan Li
Huayang Zhang
Xiaoguang Duan
Hongqi Sun, Edith Cowan UniversityFollow
Yingping Huang
Yanfen Fang
Shaobin Wang
Abstract
In this work, solar-heating-induced temperature-based photocatalytic hydrogen evolution reaction (PC-HER) of different photocatalysts (TiO2 P25, g-C3N4, and their loaded Pt) was comprehensively studied and analyzed with the assistance of a series of temperature-based in situ characterizations. It was found that pristine TiO2 P25 and g-C3N4 displayed enhanced PC-HER performances with increasing temperature (25-65 °C), while their loaded Pt nanoparticles (NPs) demonstrated a different behavior under ultraviolet (UV) or visible irradiation, presenting the highest hydrogen evolution rate at 35 °C. More interestingly, Pt NPs-g-C3N4 showed increasing PC-HER performances from 25 to 65 °C under visible light irradiation. Characterizations suggested that lowered electrical impedance, reduced band gap, increased light absorption, and elongated photoelectron lifetime with increased temperature are beneficial for improved PC-HER. However, agglomeration of Pt NPs significantly deteriorated the PC-HER performance at higher temperature and UV light can aggravate the thermal agglomeration of Pt NPs.
RAS ID
39664
Document Type
Journal Article
Date of Publication
2021
Funding Information
Australian Research Council
School
School of Engineering
Grant Number
ARC Number : DP170104264
Grant Link
http://purl.org/au-research/grants/arc/DP170104264
Copyright
subscription content
Publisher
ACS
Comments
Li, X., Lin, J., Li, J., Zhang, H., Duan, X., Sun, H., ... Wang, S. (2021). Temperature-induced variations in photocatalyst properties and photocatalytic hydrogen evolution: Differences in UV, visible, and infrared radiation. ACS Sustainable Chemistry & Engineering, 9(21), 7277-7285. https://doi.org/10.1021/acssuschemeng.1c01262