TY - JOUR
T1 - Synergy of ferroelectric polarization and oxygen vacancy to promote CO2 photoreduction
AU - Yu, Hongjian
AU - Chen, Fang
AU - Li, Xiaowei
AU - Huang, Hongwei
AU - Zhang, Qiuyu
AU - Su, Shaoqiang
AU - Wang, Keyang
AU - Mao, Enyang
AU - Mei, Bastian
AU - Mul, Guido
AU - Ma, Tianyi
AU - Zhang, Yihe
N1 - Funding Information:
This work was jointly supported by the National Natural Science Foundations of China (No. 51972288, 51672258, 52071171), the Fundamental Research Funds for the Central Universities (292019145).
Publisher Copyright:
© 2021, The Author(s).
PY - 2021/12
Y1 - 2021/12
N2 - Solar-light driven CO2 reduction into value-added chemicals and fuels emerges as a significant approach for CO2 conversion. However, inefficient electron-hole separation and the complex multi-electrons transfer processes hamper the efficiency of CO2 photoreduction. Herein, we prepare ferroelectric Bi3TiNbO9 nanosheets and employ corona poling to strengthen their ferroelectric polarization to facilitate the bulk charge separation within Bi3TiNbO9 nanosheets. Furthermore, surface oxygen vacancies are introduced to extend the photo-absorption of the synthesized materials and also to promote the adsorption and activation of CO2 molecules on the catalysts’ surface. More importantly, the oxygen vacancies exert a pinning effect on ferroelectric domains that enables Bi3TiNbO9 nanosheets to maintain superb ferroelectric polarization, tackling above-mentioned key challenges in photocatalytic CO2 reduction. This work highlights the importance of ferroelectric properties and controlled surface defect engineering, and emphasizes the key roles of tuning bulk and surface properties in enhancing the CO2 photoreduction performance.
AB - Solar-light driven CO2 reduction into value-added chemicals and fuels emerges as a significant approach for CO2 conversion. However, inefficient electron-hole separation and the complex multi-electrons transfer processes hamper the efficiency of CO2 photoreduction. Herein, we prepare ferroelectric Bi3TiNbO9 nanosheets and employ corona poling to strengthen their ferroelectric polarization to facilitate the bulk charge separation within Bi3TiNbO9 nanosheets. Furthermore, surface oxygen vacancies are introduced to extend the photo-absorption of the synthesized materials and also to promote the adsorption and activation of CO2 molecules on the catalysts’ surface. More importantly, the oxygen vacancies exert a pinning effect on ferroelectric domains that enables Bi3TiNbO9 nanosheets to maintain superb ferroelectric polarization, tackling above-mentioned key challenges in photocatalytic CO2 reduction. This work highlights the importance of ferroelectric properties and controlled surface defect engineering, and emphasizes the key roles of tuning bulk and surface properties in enhancing the CO2 photoreduction performance.
UR - http://www.scopus.com/inward/record.url?scp=85111683901&partnerID=8YFLogxK
U2 - 10.1038/s41467-021-24882-3
DO - 10.1038/s41467-021-24882-3
M3 - Article
C2 - 34321482
AN - SCOPUS:85111683901
SN - 2041-1723
VL - 12
JO - Nature communications
JF - Nature communications
IS - 1
M1 - 4594
ER -