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Mesoporous Ni-N-C as an efficient electrocatalyst for reduction of CO2 into CO in a flow cell
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK). Lanzhou Jiaotong University, China.
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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Number of Authors: 62022 (English)In: Applied Materials Today, ISSN 2352-9407, Vol. 29, article id 101619Article in journal (Refereed) Published
Abstract [en]

Recently, nitrogen-doped porous carbon materials containing non-precious metals (termed “M-N-C”) have formed a group of functional materials to replace precious metal-based catalysts for electrochemical CO2 reduction reaction. Here, a series of mesoporous Ni-N-C electrocatalysts (termed “mp-Ni-N-Cs”) were prepared via a gel-template method, and could effectively reduce CO2 into CO in a flow cell. The result in gas sorption tests exhibited a typical mesoporous structure, which would bring both sufficient exposed active sites and convenient mass transfer channels. Electrochemical tests showed excellent performance at an applied potential of -1.3 V (vs. RHE), e.g., a CO Faradaic efficiency (FECO) of 95.85 %, and a CO reduction current (jCO) of -21.29 mA cm−2. Significantly, its FECO exceeded 93 % in a wide range of potentials from -1.0 to -1.5 V, showing great tolerance to fluctuation in potential. The mp-Ni-N-C electrocatalysts have satisfactory features in terms of catalytic activity, facile preparation, and economic feasibility, and will offer a valuable reference for next exploration of cost-effective electrocatalysts for CO2 conversion.

Place, publisher, year, edition, pages
2022. Vol. 29, article id 101619
Keywords [en]
CO2 reduction reaction, CO generation, Electrocatalysis, Hetroratam Doped Porus Carbon, Flow call
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:su:diva-210654DOI: 10.1016/j.apmt.2022.101619ISI: 000862871800005Scopus ID: 2-s2.0-85136255726OAI: oai:DiVA.org:su-210654DiVA, id: diva2:1706114
Available from: 2022-10-25 Created: 2022-10-25 Last updated: 2022-10-25Bibliographically approved

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Wang, WeiZhou, ShiqiZhang, MiaoYuan, Jiayin

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