Imperial College London
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DrAndyAshley

Faculty of Natural Sciences, Department of Chemistry

Honorary Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 5810a.ashley Website

 
 
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Location

 

601LMolecular Sciences Research HubWhite City Campus

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Summary

 

Publications

Citation

BibTex format

@article{Lawrence:2014:10.1002/anie.201405721,
author = {Lawrence, EJ and Herrington, TJ and Ashley, AE and Wildgoose, GG},
doi = {10.1002/anie.201405721},
journal = {Angewandte Chemie - International Edition},
pages = {9922--9925},
title = {Metal-free dihydrogen oxidation by a borenium cation: A Combined electrochemical/frustrated Lewis pair approach},
url = {http://dx.doi.org/10.1002/anie.201405721},
volume = {53},
year = {2014}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In order to use H2 as a clean source of electricity, prohibitively rare and expensive precious metal electrocatalysts, such as Pt, are often used to overcome the large oxidative voltage required to convert H2 into 2 H+ and 2 e-. Herein, we report a metal-free approach to catalyze the oxidation of H2 by combining the ability of frustrated Lewis pairs (FLPs) to heterolytically cleave H2 with the in situ electrochemical oxidation of the resulting borohydride. The use of the NHC-stabilized borenium cation [(IiPr2)(BC 8H14)]+ (IiPr2=C3H 2(NiPr)2, NHC=N-heterocyclic carbene) as the Lewis acidic component of the FLP is shown to decrease the voltage required for H2 oxidation by 910 mV at inexpensive carbon electrodes, a significant energy saving equivalent to 175.6 kJ mol-1. The NHC-borenium Lewis acid also offers improved catalyst recyclability and chemical stability compared to B(C6F5)3, the paradigm Lewis acid originally used to pioneer our combined electrochemical/frustrated Lewis pair approach. © 2014 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.
AU  - Lawrence,EJ
AU  - Herrington,TJ
AU  - Ashley,AE
AU  - Wildgoose,GG
DO  - 10.1002/anie.201405721
EP  - 9925
PY  - 2014///
SN  - 1433-7851
SP  - 9922
TI  - Metal-free dihydrogen oxidation by a borenium cation: A Combined electrochemical/frustrated Lewis pair approach
T2  - Angewandte Chemie - International Edition
UR  - http://dx.doi.org/10.1002/anie.201405721
VL  - 53
ER  -
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