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  Ni-based electrocatalysts for unconventional CO2 reduction reaction to formic acid

Lepre, E., Heske, J., Nowakowski, M., Scoppola, E., Zizak, I., Heil, T., et al. (2022). Ni-based electrocatalysts for unconventional CO2 reduction reaction to formic acid. Nano Energy, 97: 107191. doi:10.1016/j.nanoen.2022.107191.

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 Creators:
Lepre, Enrico1, Author              
Heske, Julian2, Author              
Nowakowski, Michal, Author
Scoppola, Ernesto3, Author              
Zizak, Ivo, Author
Heil, Tobias4, Author              
Kühne, Thomas D., Author
Antonietti, Markus2, Author              
Lopez Salas, Nieves1, Author              
Albero, Josep1, Author
Affiliations:
1Nieves Lopez Salas, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_3029702              
2Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              
3Wolfgang Wagermaier, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863296              
4Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863288              

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Free keywords: CO2 reduction reaction, noble carbon, Ni-O4 electrocatalysts, formic acid
 Abstract: Electrochemical reduction stands as an alternative to revalorize CO2. Among the different alternatives, Ni single atoms supported on carbonaceous materials are an appealing catalytic solution due to the low cost and versatility of the support and the optimal usage of Ni and its predicted selectivity and efficiency (ca. 100 towards CO). Herein, we have used noble carbonaceous support derived from cytosine to load Ni subnanometric sites. The large heteroatom content of the support allows the stabilization of up to 11wt of Ni without the formation of nanoparticles through a simple impregnation plus calcination approach, where nickel promotes the stabilization of C3NOx frameworks and the oxidative support promotes a high oxidation state of nickel. EXAFS analysis points at nickel single atoms or subnanometric clusters coordinated by oxygen in the material surface. Unlike the well-known N-coordinated Ni single sites selectivity towards CO2 reduction, O-coordinated-Ni single sites (ca. 7wt of Ni) reduced CO2 to CO, but subnanometric clusters (11wt of Ni) foster the unprecedented formation of HCOOH with 27 Faradaic efficiency at -1.4V. Larger Ni amounts ended up on the formation of NiO nanoparticles and almost 100 selectivity towards hydrogen evolution.

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Language(s): eng - English
 Dates: 2022-03-262022
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.nanoen.2022.107191
BibTex Citekey: LEPRE2022107191
 Degree: -

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Title: Nano Energy
  Other : Nano Energy
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 97 Sequence Number: 107191 Start / End Page: - Identifier: ISSN: 2211-2855