Issue 3, 2011
From the journal:

Energy & Environmental Science

Probing the photoelectrochemical properties of hematite (α-Fe2O3) electrodes using hydrogen peroxide as a hole scavenger

Hen Dotan,ab   Kevin Sivula,b   Michael Grätzel,b   Avner Rothschild*a  and  Scott C. Warren*b  

* Corresponding authors

a Faculty of Materials Engineering, Technion—Israel Institute of Technology, Haifa, Israel
E-mail: avnerrot@technion.ac.il

b Laboratory of Photonics and Interfaces, EPFL, Lausanne, Switzerland
E-mail: scott.warren@epfl.ch

Abstract

We study hematite (α-Fe2O3) photoelectrodes for water splitting by examining the fate of photogenerated holes. Using H2O2 as an efficient hole scavenger, we collect all holes that arrive at the electrode/electrolyte interface. This provides the ability to distinguish between and quantify bulk and surface recombination processes involved in the photoelectrochemical oxidation of water. Below 1.0 VRHE, electrolyte oxidation kinetics limits the performance but above 1.2 VRHE bulk recombination becomes the limiting factor.

Graphical abstract: Probing the photoelectrochemical properties of hematite (α-Fe2O3) electrodes using hydrogen peroxide as a hole scavenger

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Article information

DOI
https://doi.org/10.1039/C0EE00570C
Article type
Paper
Submitted
17 Oct 2010
Accepted
29 Nov 2010
First published
23 Dec 2010

Energy Environ. Sci., 2011,4, 958-964

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Probing the photoelectrochemical properties of hematite (α-Fe2O3) electrodes using hydrogen peroxide as a hole scavenger

H. Dotan, K. Sivula, M. Grätzel, A. Rothschild and S. C. Warren, Energy Environ. Sci., 2011, 4, 958 DOI: 10.1039/C0EE00570C

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