Issue 8, 2023

Electroreduction of CO2 to syngas with controllable H2/CO ratios in a wide potential range over Ni–N co-doped ultrathin carbon nanosheets

Abstract

The conversion of CO2 to syngas (H2 and CO) via electrochemical reduction has been considered a promising strategy to mitigate the greenhouse effect. However, it is a great challenge to control H2/CO ratios over a wide voltage window. Herein, a new method of fabricating Ni–N co-doped carbon nanosheets by molten salt-assisted pyrolysis, impregnation and re-carbonization is proposed. Benefiting from their ultrathin structure and tunable Ni–Nx active site content, the H2/CO ratios can be adjusted from 1/2 to 2/1 within a wide applied voltage range (−0.7 to −1.3 V vs. RHE). After electrochemical stability testing for 10 h, the current density and H2/CO ratios remained almost constant, revealing robust long-term stability. This work may benefit the construction of efficient and low-budget electrocatalysts for the production of tunable syngas.

Graphical abstract: Electroreduction of CO2 to syngas with controllable H2/CO ratios in a wide potential range over Ni–N co-doped ultrathin carbon nanosheets

Supplementary files

Article information

Article type
Research Article
Submitted
15 jan 2023
Accepted
09 mar 2023
First published
10 mar 2023

Inorg. Chem. Front., 2023,10, 2414-2422

Electroreduction of CO2 to syngas with controllable H2/CO ratios in a wide potential range over Ni–N co-doped ultrathin carbon nanosheets

K. Gan, H. Li, R. Li, J. Niu, J. He, D. Jia and X. He, Inorg. Chem. Front., 2023, 10, 2414 DOI: 10.1039/D3QI00108C

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