Barton

D. H. Pool

D. L. DuBois

Dupuis

Ezzaher

Felton

Fontecilla-Camps

Frey

Helm

J. A. S. Roberts

Kilgore

M. O'Hagan

M. P. Stewart

Macfarlane

O'Hagan

Pregosin

R. M. Bullock

W. J. Shaw

Wilson

The electrocatalytic reduction of protons to H
 2
 by
 
 
 
 (where
 
 
 
 in the highly acidic ionic liquid dibutylformamidium bis(trifluoromethanesulfonyl)amide shows a strong dependence on added water. A turnover frequency of 43,000–53,000 s
 -1
 has been measured for hydrogen production at 25 °C when the mole fraction of water (
 χ
 
 H
 2
 O
 
 ) is 0.72. The same catalyst in acetonitrile with added dimethylformamidium trifluoromethanesulfonate and water has a turnover frequency of 720 s
 -1
 . Thus, the use of an ionic liquid/aqueous solution enhances the observed catalytic rate by more than a factor of 50, compared to a similar acid in a traditional organic solvent. Complexes
 
 
 
 (X = H, OMe,CH
 2
 P(O)(OEt)
 2
 , Br) are also catalysts in the ionic liquid/water mixture, and the observed catalytic rates correlate with the hydrophobicity of
 X
 .
 </jats:p

Douglas H. Pool

Michael P. Stewart

Molly O’Hagan

Wendy J. Shaw

John A. S. Roberts

R. Morris Bullock

Daniel L. DuBois

Crossref

Proceedings of the National Academy of Sciences

Acidic ionic liquid/water solution as both medium and proton source for electrocatalytic H
 2
 evolution by [Ni(P
 2
 N
 2
 )
 2
 ]
 2+
 complexes

Acidic ionic liquid/water solution as both medium and proton source for electrocatalytic H2 evolution by [Ni(P2N2)2]2+ complexes

Acidic ionic liquid/water solution as both medium and proton source for electrocatalytic H2 evolution by [Ni(P2N2)2]2+ complexes

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