Effect of alcohol sacrificial agent on the performance of Cu/TiO2 photocatalysts for UV-driven hydrogen production

被引：50

作者：

Chen, Wan-Ting ^{[1
,2
,3
]}

Dong, Yusong ^{[1
]}

Yadav, Pooja ^{[1
]}

Aughterson, Robert D. ^{[4
,5
]}

Sun-Waterhouse, Dongxiao ^{[1
]}

Waterhouse, Geoffrey I. N. ^{[1
,2
,3
]}

机构：

[1] Univ Auckland, Sch Chem Sci, Auckland, New Zealand

[2] MacDiarmid Inst Adv Mat & Nanotechnol, Wellington, New Zealand

[3] Dodd Walls Ctr Photon & Quantum Technol, Dunedin, New Zealand

[4] ANSTO, Inst Mat Engn, Locked Bag 2001, Kirrawee Dc, NSW 2232, Australia

[5] Univ Sydney, Australian Ctr Microscopy & Microanal, Sydney, NSW 2006, Australia

来源：

APPLIED CATALYSIS A-GENERAL | 2020年 / 602卷

关键词：

Hydrogen production; Alcohol photoreforming; TiO2; Cu; Au; SURFACE-PLASMON RESONANCE; H-2; PRODUCTION; AU/TIO2; PHOTOCATALYSTS; HIGH-EFFICIENCY; WORK FUNCTION; TIO2; WATER; NANOPARTICLES; CUO; GENERATION;

D O I：

10.1016/j.apcata.2020.117703

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study systematically investigates alcohol photoreforming over a 1 wt.% Cu/TiO2 photocatalyst under UV excitation (365 nm, 6.5mW cm(-2)), examining the effects of the alcohol (methanol, ethanol, ethylene glycol or glycerol) and alcohol concentration (0-100 vol.%) on H-2 production rates. A 1.25 wt.% CuO/TiO2 photocatalyst, based on Evonik P25, was first synthesized. Various in-situ spectroscopic methods, including Cu K-edge XANES, UV-vis absorbance spectroscopy and EPR spectroscopy, confirmed the reduction of the supported CuO to Cu-0 during alcohol photoreforming. The 1 wt.% Cu/TiO2 photocatalyst formed in-situ demonstrated excellent activity for H-2 production, comparable to a 2 wt.% Au/TiO2 reference photocatalyst. At an alcohol concentration of 10 vol.%, H-2 production rates followed the order glycerol > ethylene glycol > methanol > ethanol. At 50 vol.%, the rates followed the order methanol > ethylene glycol > glycerol approximate to ethanol. The study highlights the potential of Cu-0 as a H-2 evolution co-catalyst.

引用

页数：17

共 115 条

[1] The roles of metal co-catalysts and reaction media in photocatalytic hydrogen production: Performance evaluation of M/TiO2 photocatalysts (M = Pd, Pt, Au) in different alcohol-water mixtures [J].