TY - JOUR
T1 - Structural construction of Bi-anchored honeycomb N-doped porous carbon catalyst for efficient CO2 conversion
AU - Li, Huaxin
AU - Ao, Kelong
AU - Liu, Jiapeng
AU - Sun, Fenglei
AU - Yu, Xianbo
AU - Zhang, Xiangyang
AU - Shi, Jihong
AU - Yue, Xian
AU - Xiang, Junhui
PY - 2023/5/15
Y1 - 2023/5/15
N2 - Electrocatalytic CO2 reduction reaction (CO2RR) 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 (FEHCOOH) of Bi@NCFs catalyst is higher than 79% in the potential range of −0.8~-1.3 V vs. RHE, of which FEHCOOH is as high as 95.70% at −1.0 V vs. RHE. After 48 h stability test, the FEHCOOH 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 CO2RR. 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 CO2RR. © 2023 Elsevier B.V.
AB - Electrocatalytic CO2 reduction reaction (CO2RR) 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 (FEHCOOH) of Bi@NCFs catalyst is higher than 79% in the potential range of −0.8~-1.3 V vs. RHE, of which FEHCOOH is as high as 95.70% at −1.0 V vs. RHE. After 48 h stability test, the FEHCOOH 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 CO2RR. 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 CO2RR. © 2023 Elsevier B.V.
KW - CO2 Conversion
KW - Electrocatalysis
KW - Honeycomb catalyst
KW - Porous Structure
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85151290222&origin=recordpage
U2 - 10.1016/j.cej.2023.142672
DO - 10.1016/j.cej.2023.142672
M3 - RGC 21 - Publication in refereed journal
SN - 1385-8947
VL - 464
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 142672
ER -