Structural construction of Bi-anchored honeycomb N-doped porous carbon catalyst for efficient CO2 conversion

Li，Huaxin1; Ao，Kelong3; Liu，Jiapeng4,5; Sun，Fenglei1; Yu，Xianbo1; Zhang，Xiangyang6; Shi，Jihong6; Yue，Xian1,2; Xiang，Junhui1

2023-05-15

10.1016/j.cej.2023.142672

Chemical Engineering Journal   Impact Factor & Quartile

1385-8947

Electrocatalytic CO reduction reaction (CORR) technology has attracted extensive attention owing to mild reaction conditions, high energy conversion efficiency, and facile adaptability. However, it remains a great challenge for the lack of highly active catalysts and the selectivity of reduction products. Herein, we successfully fabricated the Bi nanoparticles diffused in nitrogen-doped carbon frame catalysts (Bi@NCFs) by an in-situ pyrolysis process. The electrocatalytic test results demonstrate that the Faradaic efficiency of formate (FE) of Bi@NCFs catalyst is higher than 79% in the potential range of −0.8～-1.3 V vs. RHE, of which FE is as high as 95.70% at −1.0 V vs. RHE. After 48 h stability test, the FE still preserves over 81.3%, indicating excellent durability and stability of the catalyst in H-cell. The synergistic effect between the honeycomb-like porous carbon framework and Bi NPs enhance the electrocatalytic activity of the catalyst; on the other hand, nano-scale Bi particles exist on the surface and inside of the porous carbon framework, increasing the active sites for CORR. Even under high current in the flow cell, the catalyst exhibits high formic acid selectivity and DFT calculation proves the superiority of formic acid generation. This work provides insights into synthesizing N-doped porous carbon framework supported nano-metal catalysts for CORR.

CO2 Conversion Electrocatalysis Honeycomb catalyst Porous Structure

English

Corresponding

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1.Center of Materials Science and Optoelectronics Engineering,College of Materials Sciences,University of Chinese Academy of Sciences,Beijing,100049,China
2.Department of Chemistry,Southern University of Science and Technology,Shenzhen,518055,China
3.School of Mechanical and Aerospace Engineering,Nanyang Technological University,Singapore,639798,Singapore
4.School of Advanced Energy,Sun Yat-Sen University,Shenzhen,518107,China
5.AI for Science Institute,Beijing,100085,China
6.Department of Mechanical Engineering,City University of Hong Kong,999077,Hong Kong

Li，Huaxin,Ao，Kelong,Liu，Jiapeng,et al. Structural construction of Bi-anchored honeycomb N-doped porous carbon catalyst for efficient CO2 conversion[J]. Chemical Engineering Journal,2023,464.

Li，Huaxin.,Ao，Kelong.,Liu，Jiapeng.,Sun，Fenglei.,Yu，Xianbo.,...&Xiang，Junhui.(2023).Structural construction of Bi-anchored honeycomb N-doped porous carbon catalyst for efficient CO2 conversion.Chemical Engineering Journal,464.

Li，Huaxin,et al."Structural construction of Bi-anchored honeycomb N-doped porous carbon catalyst for efficient CO2 conversion".Chemical Engineering Journal 464(2023).