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Cr 2 O 3 Nanoparticle-Reduced Graphene Oxide Hybrid: A Highly Active Electrocatalyst for N 2 Reduction at Ambient Conditions.
- Source :
-
Inorganic chemistry [Inorg Chem] 2019 Feb 18; Vol. 58 (4), pp. 2257-2260. Date of Electronic Publication: 2019 Jan 28. - Publication Year :
- 2019
-
Abstract
- Electrochemical reduction is an eco-friendly alternative for energy-saving artificial N <subscript>2</subscript> fixation. The development of this process requires efficient N <subscript>2</subscript> reduction reaction (NRR) electrocatalysts to overcome the challenge with N <subscript>2</subscript> activation. We show that a Cr <subscript>2</subscript> O <subscript>3</subscript> nanoparticle-reduced graphene oxide hybrid (Cr <subscript>2</subscript> O <subscript>3</subscript> -rGO) is as an outstanding catalyst for electrochemical N <subscript>2</subscript> -to-NH <subscript>3</subscript> conversion under ambient conditions. In 0.1 M HCl, Cr <subscript>2</subscript> O <subscript>3</subscript> -rGO achieves a high NH <subscript>3</subscript> yield of 33.3 μg h <superscript>-1</superscript> mg <superscript>-1</superscript> <subscript>cat.</subscript> at -0.7 V vs RHE and a high Faradaic efficiency of 7.33% at -0.6 V vs RHE, with excellent selectivity for NH <subscript>3</subscript> synthesis and stability. Density functional theory calculations were executed to gain further insight into the mechanisms.
Details
- Language :
- English
- ISSN :
- 1520-510X
- Volume :
- 58
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Inorganic chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 30688065
- Full Text :
- https://doi.org/10.1021/acs.inorgchem.8b03143