Electrochemical Ammonia Synthesis via Nitrogen Reduction Reaction on a MoS<sub>2</sub> Catalyst: Theoretical and Experimental Studies.
basic_science · Level V
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- Record sourced from PubMed, PMID 29808517.
- Also identified by DOI 10.1002/adma.201800191.
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Abstract
The discovery of stable and noble-metal-free catalysts toward efficient electrochemical reduction of nitrogen (N<sub>2</sub> ) to ammonia (NH<sub>3</sub> ) is highly desired and significantly critical for the earth nitrogen cycle. Here, based on the theoretical predictions, MoS<sub>2</sub> is first utilized to catalyze the N<sub>2</sub> reduction reaction (NRR) under room temperature and atmospheric pressure. Electrochemical tests reveal that such catalyst achieves a high Faradaic efficiency (1.17%) and NH<sub>3</sub> yield (8.08 × 10<sup>-11</sup> mol s<sup>-1</sup> cm<sup>-1</sup> ) at -0.5 V versus reversible hydrogen electrode in 0.1 m Na<sub>2</sub> SO<sub>4</sub> . Even in acidic conditions, where strong hydrogen evolution reaction occurs, MoS<sub>2</sub> is still active for the NRR. This work represents an important addition to the growing family of transition-metal-based catalysts with advanced performance in NRR.