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Metal-Free SeBN Ternary-Doped Porous Carbon as Efficient Electrocatalysts for CO2 Reduction Reaction
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).ORCID iD: 0000-0003-3582-6075
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Number of Authors: 72022 (English)In: ACS Applied Energy Materials, E-ISSN 2574-0962, Vol. 5, no 9, p. 10518-10525Article in journal (Refereed) Published
Abstract [en]

Cost-effective heteroatom-doped porous carbons are considered promising electrocatalysts for CO2 reduction reaction (CO2RR). Traditionally porous carbons with N doping or N/X codoping (X denotes the second type of heteroatom) have been widely studied, leaving ternary doping a much less studied yet exciting topic to be explored. Herein, a series of electrocatalysts based on metal-free Se, B, and N ternary-doped porous carbons (termed “SeBN-Cs”) were synthesized and tested as metal-free electrocatalysts in CO2RR. Our study indicates that the major product of CO2RR on the SeBN-C electrocatalysts was CO with a small fraction (<5%) of H2 as the byproduct. The optimal electrocatalyst sample SeBN-C-1100 prepared at 1100 °C exhibits a high CO selectivity with a Faradaic efficiency of CO reaching 95.2%. After 10 h of continuous electrolysis operation, the Faradaic efficiency and the current density are maintained high at 97.6 and 84.7% of the initial values, respectively, indicative of a long-term operational stability. This study provides an excellent reference to deepen our understanding of the properties and functions of multi-heteroatom-doped porous carbon electrocatalysts in CO2RR. 

Place, publisher, year, edition, pages
2022. Vol. 5, no 9, p. 10518-10525
Keywords [en]
porous carbon, selenium doping, metal-free electrocatalyst, CO production, CO2 reduction reaction
National Category
Chemical Sciences Chemical Engineering
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URN: urn:nbn:se:su:diva-209267DOI: 10.1021/acsaem.2c01201ISI: 000848092500001Scopus ID: 2-s2.0-85137306437OAI: oai:DiVA.org:su-209267DiVA, id: diva2:1695933
Available from: 2022-09-15 Created: 2022-09-15 Last updated: 2022-09-29Bibliographically approved

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Zhang, MiaoZhou, ShiqiYuan, Jiayin

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