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Ambient NH3 synthesis via electrochemical reduction of N2 over cubic sub-micron SnO2 particle

Abstract

Electrochemical N2-to-NH3 fixation at ambient conditions is emerging as a promising alternative to the energy-intensive and CO2-emitting Haber-Bosch process. However, this process involves difficulty in N2 activation, underlining the demand of electrocatalysts for N2 reduction reaction (NRR). In this work, cubic SnO2 sub-micron particle on carbon cloth (SnO2/CC) is proposed as an efficient NRR electrocatalyst for ambient N2 conversion to NH3 with excellent selectivity. Electrochemical tests reveal that SnO2/CC attains a large NH3 yield of 1.47 × 10–10 mol s–1 cm–2 at –0.8 V vs. reversible hydrogen electrode (RHE) and a high Faradaic efficiency of 2.17% at –0.7 V vs. RHE in 0.1 M Na2SO4, outperforming most reported aqueous-based NRR electrocatalysts. Notably, it also shows strong electrochemical stability.

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Publication details

The article was received on 10 Aug 2018, accepted on 12 Oct 2018 and first published on 12 Oct 2018


Article type: Communication
DOI: 10.1039/C8CC06524A
Citation: Chem. Commun., 2018, Accepted Manuscript
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    Ambient NH3 synthesis via electrochemical reduction of N2 over cubic sub-micron SnO2 particle

    L. Zhang, X. Ren, Y. Luo, X. Shi, A. M. Asiri, T. S. Li and X. Sun, Chem. Commun., 2018, Accepted Manuscript , DOI: 10.1039/C8CC06524A

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