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Ceria-reduced graphene oxide nanocomposite as an efficient electrocatalyst towards artificial N2 conversion to NH3 under ambient conditions

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Abstract

For over a century, NH3 synthesis via the Haber–Bosch process has brought huge energy costs and high CO2 emission. The electrochemical N2 reduction reaction is an environmentally-benign alternative, which can be driven by renewable energy. In this work, CeO2 nanoparticle–reduced graphene oxide nanocomposites (CeO2–rGO) behave as an efficient non-noble-metal N2 reduction reaction electrocatalyst with excellent selectivity. In 0.1 M Na2SO4, CeO2–rGO achieves a high faradaic efficiency of 4.78% and a large NH3 yield of 16.98 μg h−1 mgcat.−1 at −0.7 V vs. reversible hydrogen electrode. The catalytic mechanism was explored using density functional theory calculations.

Graphical abstract: Ceria-reduced graphene oxide nanocomposite as an efficient electrocatalyst towards artificial N2 conversion to NH3 under ambient conditions

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Publication details

The article was received on 10 Jul 2019, accepted on 12 Aug 2019 and first published on 13 Aug 2019


Article type: Communication
DOI: 10.1039/C9CC05309C
Chem. Commun., 2019, Advance Article

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    Ceria-reduced graphene oxide nanocomposite as an efficient electrocatalyst towards artificial N2 conversion to NH3 under ambient conditions

    H. Xie, Q. Geng, X. Li, T. Wang, Y. Luo, A. A. Alshehri, K. A. Alzahrani, B. Li, Z. Wang and J. Mao, Chem. Commun., 2019, Advance Article , DOI: 10.1039/C9CC05309C

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