Synergistic catalysis of bimetallic nitrogen-doped carbon materials for efficient electrocatalytic CO2 reduction

Huiying TIAN, Ziyi SHUI, Muhammad Ali RAZA, Liangliang ZHU, Xi CHEN*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

1 Citation (Scopus)

Abstract

Long-term continuous operation and large-scale development are essential for practical applications of electrocatalytic CO2 reduction (ECR). Herein, Fe/Ni binary metal nitrogen-doped carbon (Fe/Ni-N-C) materials were successfully constructed and evaluated in typical H cell. The Fe/Ni-N-C electrocatalyst showed a highest CO Faradaic efficiency (FECO) of 92.9% at − 0.677 V vs. RHE and a largest turnover frequency of 10.77 × 103 h−1. After being transferred to a larger-scale continuous flow cell, Fe/Ni-N-C exhibited higher current density and FECO with robust durability. Above 89% of FECO was reserved after 40 h of electrolysis. It was found that the synergetic effects of the binary metals effectively enhanced the charge transfer rate and provided favorable kinetics. Based on Fe/Ni-N-C as the cathode, an aqueous Zn-CO2 battery was further assembled with excellent charge-discharge cycle stability, which could serve as the electricity supply for ECR. © 2023 Elsevier B.V.
Original languageEnglish
Article number170544
JournalJournal of Alloys and Compounds
Volume958
Early online date11 May 2023
DOIs
Publication statusPublished - 5 Oct 2023
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (11872302) and the Young Talent Support Program of Xi'an Science and Technology Association (095920221368).

Publisher Copyright:
© 2023 Elsevier B.V.

Keywords

  • Bimetallic nitrogen-doped carbon catalyst
  • Electrocatalytic CO reduction
  • Rechargeable Zn-CO battery
  • Synergistic catalysis

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