Adv. Energy Mater.: Selective CO2 Reduction on 2D Mesoporous Bi Nanosheets

Title：

Selective CO₂ Reduction on 2D Mesoporous Bi Nanosheets

Authors：

Hui Yang¹, Na Han¹, Jun Deng¹, Jinghua Wu¹, Yu Wang², Yongpan Hu¹, Pan Ding¹, Yafei Li², Yanguang   Li,*^,1 and Jun Lu*^,3

Institutions：

¹Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China.

²College of Chemistry and Materials Science Nanjing Normal University Nanjing 210023, China.

³Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 Cass Avenue, Lemont, IL 60439, USA.

Abstract：

The conversion of CO₂ to value-added products using electrical or solar energy represents an attractive means for the capture and utilization of atmospheric CO₂. Formate is a popular product from CO₂ reduction, but its reaction selectivity is usually unsatisfactory. Tin-based materials have attracted the most attention for formate production at present. Unfortunately, most of them only exhibit moderate selectivity in a narrow and highly cathodic potential window. In this study, it is demonstrated that traditionally under-explored bismuth has a much greater potential for formate production than tin or other materials. Mesoporous bismuth nanosheets are prepared here by the cathodic transformation of atomic-thick bismuth oxycarbonate nanosheets. They enable the selective CO₂ reduction to formate with large current density, excellent Faradaic efficiency (≈100%) over a broad potential window and great operation stability. Moreover, Bi nanosheets are integrated with an oxygen evolution reaction electrocatalyst in full cells, and achieve efficient and robust solar conversion of CO₂/H₂O to formate/O_2.

IF：

21.875

Link：

https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.201801536