Highly Efficient Photocatalytic CO2 Methanation over Ru-Doped TiO2 with Tunable Oxygen Vacancies

被引：0
|
作者：
Zheyue Li [1 ]
Di Wu [1 ]
Wanbing Gong [1 ]
Jiayi Li [1 ]
Shuaikang Sang [1 ]
Hengjie Liu [1 ]
Ran Long [1 ]
Yujie Xiong [1 ,2 ]
机构：
[1] Hefei National Research Center for Physical Sciences at the Microscale, School of Chemistry and Materials Science, National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China
[2] Institute of Energy, Hefei Comprehensive National Science Center
来源：
ChineseJournalofStructuralChemistry | 2022年 / 41卷 / 12期
基金：
国家重点研发计划;
关键词：
D O I：
10.14102/j.cnki.0254-5861.2022-0212
中图分类号：
X701 [废气的处理与利用]; O643.36 [催化剂]; O644.1 [光化学];
学科分类号：
070304 ; 081704 ; 081705 ; 083002 ;
摘要：
Solar-driven CO2methanation is an imperative and promising approach to relieve the global warming and environmental crisis,yet remains a great challenge due to the low reaction efficiency,unsatisfactory selectivity and poor stability.In this work,we demonstrate a facile and efficient strategy to prepare Ru-doped TiO2photocatalyst with tunable oxygen vacancies using the ascorbic acid as a reducing agent for the CO2methanation reaction.The optimal Ru-TiO2-OV-50 exhibits a remarkable CH4production rate of 81.7 mmol g-1h-1with a 100%CH4selectivity under a 1.5 W cm-2light illumination,which is significantly higher than commercial Ru/TiO2and other reported catalysts.We reveal that the superior photocatalytic CO2methanation performance is mainly due to the synergistic effect of Ru doping and TiO2with tunable oxygen vacancies.Impressively,the light rather than thermal effect is confirmed as the main influencing factor by experimental studies.In addition,in situ spectroscopic technology is performed to investigate the CO2methanation reaction pathway.This work will open an avenue to design and prepare highly efficient photocatalyst with tunable oxygen vacancies for CO2conversion and other related applications.
引用
收藏
页码：43 / 50
页数：8
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