741264-93-7Relevant academic research and scientific papers
Electrochemical hydrogen production in acidic water by an azadithiolate bridged synthetic hydrogenese mimic: Role of aqueous solvation in lowering overpotential
Dey, Subal,Rana, Atanu,Dey, Somdatta Ghosh,Dey, Abhishek
, p. 429 - 436 (2013)
An inherent problem stalling the development of a H2-based global energy economy is the unavailability of efficient functional catalysts that can function in aqueous media. A Fe-Fe hydrogenase mimic is investigated for electrocatalytic hydrogen generation in aqueous medium. H2 is produced from acid water (pH a Fe-Fe hydrogenase mimic immobilized on graphite surfaces. These catalysts are known to reduce H+ at very negative potentials in organic solvents. However, in aqueous medium, the H + reduction potential is shifted to much more positive values. The catalyst shows a turnover frequency of 6400 s-1 at -0.5 V and an onset potential of -0.36 V vs NHE. Prolonged electrolysis shows that the catalyst has a turnover number ?108 and a Faradaic efficiency > 95%. Even at pH 2, that is, [H]+ = 0.01 N, Icat/[τ] > 400 s-1 is obtained. The catalyst can be immobilized on cheap carbon electrodes, used in domestic Zn-Carbon dry batteries, to generate H 2 from acid aqueous solutions.
