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Cited by 92CO2 Reduction Techniques and CatalystsElectrocatalysts for Energy ConversionCarbon dioxide utilization in catalysis

Cobalt Spinel Nanocubes on N-Doped Graphene: A Synergistic Hybrid Electrocatalyst for the Highly Selective Reduction of Carbon Dioxide to Formic Acid

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Sekar, Pandiaraj, Calvillo, Laura, Tubaro, Cristina, Baron, Marco, Pokle, Anuj, Carraro, Francesco, Martucci, Alex, Agnoli, Stefano·2017·ACS Catalysis
DOI 10.1021/acscatal.7b02166
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Abstract

Carbon dioxide reduction into useful chemical products is a key technology to address urgent climate and energy challenges. In this study, a nanohybrid made by Co3O4 and graphene is proposed as an efficient electrocatalyst for the selective reduction of CO2 to formate at low overpotential. A comparison between samples with different metal oxide to carbon ratios and with or without doping of the graphene moiety indicates that the most active catalyst is formed by highly dispersed and crystalline nanocubes exposing {001} oriented surfaces, whereas the nitrogen doping is critical to obtain a controlled morphology and to facilitate a topotactic transformation during electrocatalytic conditions to CoO, which results in the true active phase. The nanohybrid made up by intermediate loading of Co3O4 supported on nitrogen-doped graphene is the most active catalyst, being able to produce 3.14 mmol of formate in 8 h at −0.95 V vs SCE with a Faradaic efficiency of 83%.

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Cited by

Sorted by citations

Authors
Sekar, P., Calvillo, L., Tubaro, C., Baron, M., Pokle, A., Carraro, F., Martucci, A., & Agnoli, S.
Affiliations
  • University of Padua (IT)
  • Trinity College Dublin (IE)
Corresponding author
Agnoli, Stefano
ORCID
Venue
ACS Catalysis
Publisher
American Chemical Society (ACS)
Published
2017-09-28
Volume
7
Issue
11
Pages
7695-7703
ISSN
2155-5435 (ISSN-L)
DOI
10.1021/acscatal.7b02166
OpenAlex
W2758999824
Cited by
92
References
3
Citations by year
2026: 5 · 2025: 4 · 2024: 12 · 2023: 6 · 2022: 6 · 2021: 11 · 2020: 19 · 2019: 18 · 2018: 11
FWCI
3.52
Type
journal article
Language
en
Open access
Licence
Locations
  • ACS Catalysis (publishedVersion, other-oa)
  • Padua Research Archive (University of Padova) (submittedVersion, other-oa)
Funders
  • Fondazione Cassa di Risparmio di Padova e Rovigo (NA)
  • Ministero dell’Istruzione, dell’Università e della Ricerca (2015K7FZLH, RBFR128BEC)
  • Università degli Studi di Padova (CPDA128318/12)
  • Ministero degli Affari Esteri e della Cooperazione Internazionale (NA)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Chemical Engineering › Process Chemistry and Technology › Carbon dioxide utilization in catalysis
Keywords
CO2 reduction, formate production, cobalt spinel, Co3O4 nanocubes, nitrogen-doped graphene, electrocatalysts, topotactic transformation, Faradaic efficiency, hybrid nanostructures

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