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Morphology-dependent electrocatalytic nitrogen reduction on Ag triangular nanoplates

Abstract

Electrocatalytic nitrogen reduction reactions (ENRR) can produce ammonia from nitrogen and water under ambient conditions. However, catalysis system capable of reducing nitrogen molecules with high selectivity and activity at low overpotentials remain elusive. Here, we report the morphology-dependent electro-catalytic nitrogen reduction on Ag triangular nanoplates. Boosted by potassium cations, Ag triangular nanoplates with sharp edges exhibit a high Faradaic efficiency of 25% with an ammonia yield of 58.5 mg gAg–1 h–1 at a low overpotential of –0.25 V vs RHE in aqueous solutions under ambient conditions. In comparison, rounded Ag nanoparticles mainly enclosed by {111} and {100} surfaces show much smaller Faradaic efficiency of 16% and ammonia yield of 38 mg gAg–1 h–1 at a larger overpotential (–0.35 V vs RHE). Our synergistic strategy of a catalyst-promoter pair represents an efficient route for electrochemical ammonia synthesis and may find wider applicability in designing efficient electrocatalysis systems.

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Supplementary files

Publication details

The article was received on 19 Jun 2019, accepted on 12 Aug 2019 and first published on 12 Aug 2019


Article type: Communication
DOI: 10.1039/C9CC04691G
Chem. Commun., 2019, Accepted Manuscript

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    Morphology-dependent electrocatalytic nitrogen reduction on Ag triangular nanoplates

    A. Yin, W. Gao, Y. Hao, X. Su, L. Chen, T. Bu, N. Zhang, Z. Yu and Z. Zhu, Chem. Commun., 2019, Accepted Manuscript , DOI: 10.1039/C9CC04691G

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