Dual-active-center in Co doping LiNbO3 for enhanced CO2 photoreduction in pure water

被引:4
|
作者
Sun, Liangling [1 ]
Cai, Hairui [1 ]
Wang, Bin [1 ]
Xu, Jingwen [1 ]
Zeng, Xiaoxiao [1 ]
Liang, Chao [1 ]
Yang, Zhimao [1 ]
Yang, Shengchun [1 ,2 ]
机构
[1] Xi An Jiao Tong Univ, Sch Phys, MOE Key Lab Nonequilibrium Synth & Modulat Condens, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, Natl Innovat Platform Ctr Ind Educ Integrat Energy, Xian 710049, Peoples R China
来源
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2024年 / 347卷
关键词
CO2; reduction; Photocatalysis; High selectivity; Dual; -active; -center; PHOTOCATALYTIC REDUCTION; HYDROGEN-PRODUCTION;
D O I
10.1016/j.apcatb.2024.123789
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
Photocatalysis techniques for converting CO2 into valuable chemicals driven by solar irradiation has drawn increasing attention. While many photocatalysts often generate by-products that pose challenges for the subsequent synthesis of more complex products. Therefore, designing catalysts with both high selectivity and activity has become a critical issue. Our study reveals that the formation of dual-active-center in Co doping LiNbO3 (Co-LN) photocatalyst greatly improves the yield and selectivity of CO in photoreduction of CO2 in pure water at room temperature without requiring additional sacrificial agents. The extended X-ray absorption fine structure spectroscopy together with some in-situ measurement techniques and theoretical calculations reveal that the dual-active-center of oxygen vacancy and Co-dopant stabilizes the *CO2 and *CO intermediates, respectively, which regulates the rate-limiting step and facilitates the high activity and selectivity. This research will stimulate in-depth research on the use of efficient niobate materials for the photocatalytic conversion of CO2.
引用
收藏
页数:11
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