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Incorporation of nickel single atoms into carbon paper as self-standing electrocatalyst for CO2 reduction

Li, Simin, Ceccato, Marcel, Lu, Xiuyuan, Frank, Sara, Lock, Nina, Roldan, Alberto, Hu, Xin-Ming, Skrydstrup, Troels and Daasbjerg, Kim 2021. Incorporation of nickel single atoms into carbon paper as self-standing electrocatalyst for CO2 reduction. Journal of Materials Chemistry A 9 , pp. 1583-1592. 10.1039/D0TA08433F

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The design of selective and efficient self-standing catalysts for electrochemical CO2 reduction is highly desirable yet still challenging, in particular, if the aim is to make them both binder-free and self-standing. Here, we report a new and straightforward strategy to incorporate Ni single atoms into a commercially available carbon paper to prepare a self-standing electrode. This is accomplished by consecutive acid activation, adsorption of Ni2+ ions, and pyrolysis steps. Structural characterizations and calculations based on density functional theory consistently suggest that the Ni single atoms are coordinated with three N and one S atoms on the carbon paper. When used for CO2 electroreduction the electrode exhibits an optimal selectivity (91%), activity (3.4 mA/cm2), and stability (at least 14 h) for CO production in water at an overpotential of 660 mV. This report may inspire the design and incorporation of single atoms of various metal types into carbon papers, or other kinds of carbon substrates, for a wide range of electrocatalytic processes.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: Royal Society of Chemistry
ISSN: 2050-7488
Date of First Compliant Deposit: 17 December 2020
Date of Acceptance: 13 December 2020
Last Modified: 15 Dec 2021 16:25

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