MoS 2 Polymorphic Engineering Enhances Selectivity in the Electrochemical Reduction of Nitrogen to Ammonia

Suryanto, B, Wang, D, Azofra, L, Harb, M, Cavallo, L, Jalili, A, Mitchell, D, Chatti, M and MacFarlane, D 2019, 'MoS 2 Polymorphic Engineering Enhances Selectivity in the Electrochemical Reduction of Nitrogen to Ammonia', ACS Energy Letters, vol. 4, no. 2, pp. 430-435.


Document type: Journal Article
Collection: Journal Articles

Title MoS 2 Polymorphic Engineering Enhances Selectivity in the Electrochemical Reduction of Nitrogen to Ammonia
Author(s) Suryanto, B
Wang, D
Azofra, L
Harb, M
Cavallo, L
Jalili, A
Mitchell, D
Chatti, M
MacFarlane, D
Year 2019
Journal name ACS Energy Letters
Volume number 4
Issue number 2
Start page 430
End page 435
Total pages 6
Publisher American Chemical Society
Abstract The electrochemical N 2 reduction reaction (NRR) offers a direct pathway to produce NH 3 from renewable energy. However, aqueous NRR suffers from both low Faradaic efficiency (FE) and low yield rate. The main reason is the more favored H + reduction to H 2 in aqueous electrolytes. Here we demonstrate a highly selective Ru/MoS 2 NRR catalyst on which the MoS 2 polymorphs can be controlled to suppress H + reduction. A NRR FE as high as 17.6% and NH 3 yield rate of 1.14 × 10 -10 mol cm -2 s -1 are demonstrated at 50 °C. Theoretical evidence supports a hypothesis that the high NRR activity originates from the synergistic interplay between the Ru clusters as N 2 binding sites and nearby isolated S-vacancies on the 2H-MoS 2 as centers for hydrogenation; this supports formation of NH 3 at the Ru/2H-MoS 2 interface.
Subject Functional Materials
Nanomaterials
Synthesis of Materials
Keyword(s) Atmospheric-Pressure
Ambient Conditions
Sulfur Vacancies
N-2
Carbon
Temperature
Electrosynthesis
Nanosheets
Mechanism
Catalysts
DOI - identifier 10.1021/acsenergylett.8b02257
Copyright notice © 2018 American Chemical Society
ISSN 2380-8195
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