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

We study hematite (alpha-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 V-RHE, electrolyte oxidation kinetics limits the performance but above 1.2 V-RHE bulk recombination becomes the limiting factor.


Published in:
Energy & Environmental Science, 4, 958-964
Year:
2011
Keywords:
Laboratories:




 Record created 2011-12-16, last modified 2018-09-13


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