Rubidium Doped Cs2AgBiBr6 Hierarchical Microsphere for Enhanced Photocatalytic CO2 Reduction

被引：0

作者：

Chen, Zhihao ^{[1
]}

Jiang, Xinyan ^{[1
]}

Xu, Hongpeng ^{[1
]}

Wang, Jin ^{[1
,2
]}

Zhang, Meng ^{[1
]}

Pan, Danrui ^{[1
]}

Jiang, Guocan ^{[2
]}

Shahid, Malik Zeeshan ^{[1
]}

Li, Zhengquan ^{[1
,2
]}

机构：

[1] Zhejiang Normal Univ, Minist Educ Adv Catalysis Mat, Key Lab, Jinhua 321004, Zhejiang, Peoples R China

[2] Zhejiang Normal Univ, Zhejiang Inst Photoelect, Jinhua 321004, Zhejiang, Peoples R China

来源：

SMALL | 2024年 / 20卷 / 40期

基金：

中国国家自然科学基金;

关键词：

CO2; reduction; Cs2AgBiBr6; lead-free perovskites; photocatalysis; Rb doping; PEROVSKITE; NANOCRYSTALS; PERFORMANCE; EFFICIENT; DESIGN;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Halide perovskites have garnered significant attention for their unique optoelectronic properties in solar-to-fuel conversions. However, the efficiency of halide perovskites in the field of photocatalytic CO2 reduction is largely limited by serious charge recombination and a lack of efficient active sites. In this work, a rubidium (Rb) doped Cs2AgBiBr6 (Rb:CABB) hierarchical microsphere is developed for photocatalytic CO2 reduction. Experimental and theoretical analysis discloses that partially substituting Rb+ for Ag+ can effectively modulate the electronic structure of CABB, favoring charge separation and making adjacent Bi atoms an electron-rich active site. Further investigations indicated that Rb doping also reduces the energy barriers of the rate-determining step in CO2 reduction. As a result, Rb:CABB demonstrated an enhanced CO yield compared to its undoped counterpart. This work presents a promising approach to optimizing the electronic structures of photocatalysts and paving a new way for exploring halide perovskites for photocatalytic CO2 reduction.

引用

页数：8