Imperial College London
Portrait Picture

Dr Steph Pendlebury

Faculty of Engineering

IMSE Institute Manager
 
 
 
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Contact

 

+44 (0)20 7594 0901s.pendlebury Website

 
 
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Location

 

Level 2 Office, Central LibraryAbdus Salam LibrarySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Le:2015:10.1021/jacs.5b02576,
author = {Le, Formal F and Pastor, E and Tilley, SD and Mesa, CA and Pendlebury, SR and Graetzel, M and Durrant, JR},
doi = {10.1021/jacs.5b02576},
journal = {Journal of the American Chemical Society},
pages = {6629--6637},
title = {Rate law analysis of water oxidation on a hematite surface},
url = {http://dx.doi.org/10.1021/jacs.5b02576},
volume = {137},
year = {2015}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Water oxidation is a key chemical reaction, central to both biological photosynthesis and artificial solar fuel synthesis strategies. Despite recent progress on the structure of the natural catalytic site, and on inorganic catalyst function, determining the mechanistic details of this multiredox reaction remains a significant challenge. We report herein a rate law analysis of the order of water oxidation as a function of surface hole density on a hematite photoanode employing photoinduced absorption spectroscopy. Our study reveals a transition from a slow, first order reaction at low accumulated hole density to a faster, third order mechanism once the surface hole density is sufficient to enable the oxidation of nearest neighbor metal atoms. This study thus provides direct evidence for the multihole catalysis of water oxidation by hematite, and demonstrates the hole accumulation level required to achieve this, leading to key insights both for reaction mechanism and strategies to enhance function.
AU  - Le,Formal F
AU  - Pastor,E
AU  - Tilley,SD
AU  - Mesa,CA
AU  - Pendlebury,SR
AU  - Graetzel,M
AU  - Durrant,JR
DO  - 10.1021/jacs.5b02576
EP  - 6637
PY  - 2015///
SN  - 1520-5126
SP  - 6629
TI  - Rate law analysis of water oxidation on a hematite surface
T2  - Journal of the American Chemical Society
UR  - http://dx.doi.org/10.1021/jacs.5b02576
UR  - https://pubs.acs.org/doi/10.1021/jacs.5b02576
UR  - http://hdl.handle.net/10044/1/25031
VL  - 137
ER  -
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