Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6600846 | Electrochemistry Communications | 2018 | 22 Pages |
Abstract
Ammonia was electrochemically produced from nitrogen and water using a ruthenium-platinum (RuPt) alloy catalyst cathode and a nickel anode at ambient pressure and room temperature. The rate of ammonia formation was 5.1â¯Ãâ¯10â9â¯gNH3â¯sâ1â¯cmâ2 with a 13.2% faradaic efficiency at an applied potential of 0.123â¯V vs. RHE; it reached 1.08â¯Ãâ¯10â8â¯gNH3â¯sâ1â¯cmâ2 at 0.023â¯V. Ammonia production was investigated under selected potentials and temperatures. Real-time direct electrochemical mass spectrometric (DEMS) analysis of the evolved gases was performed at various applied potentials. In general, the mass-to-charge ratio signals of hydrogen and ammonia were detected, and their intensities increased with increasing potentials; however, there was no trace of a hydrazine signal. Compared to metallic ruthenium and platinum catalysts, RuPt showed a synergistic effect toward electrochemical formation of ammonia due to co-catalysis.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Revanasiddappa Manjunatha, Alex Schechter,