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Article Dans Une Revue ACS Catalysis Année : 2017

Electrochemical reduction of CO2 catalyzed by Fe-N-C materials: a structure-selectivity study

Résumé

Selective electrochemical reduction of CO2 into energy-dense organic compounds is a promising strategy for using CO2 as a carbon source. Herein, we investigate a series of iron-based catalysts synthesized by pyrolysis of Fe-, N- and C- containing precursors for the electroreduction of CO2 to CO in aqueous conditions and demonstrate that the selectivi-ty of these materials for CO2 reduction over proton reduction is governed by the ratio of isolated FeN4 sites vs. Fe-based nanoparticles. This ratio can be synthetically tuned to generate electrocatalysts producing controlled CO/H2 ratios. It notably allows preparing materials containing only FeN4 sites, which are able to selectively reduce CO2 to CO in aqueous solution with Faradaic yields over 90% and at low overpotential.

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Chimie
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Dates et versions

hal-01445701 , version 1 (25-01-2017)

Identifiants

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Tran Ngoc Huan, Nastaran Ranjbar, Gwenaelle Rousse, Moulay Tahar Sougrati, Andrea Zitolo, et al.. Electrochemical reduction of CO2 catalyzed by Fe-N-C materials: a structure-selectivity study. ACS Catalysis, 2017, pp.1520-1525. ⟨10.1021/acscatal.6b03353⟩. ⟨hal-01445701⟩
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