Lattice Defect-Enhanced Hydrogen Production in Nanostructured Hematite-Based Photoelectrochemical Device
Citations Over TimeTop 10% of 2012 papers
Abstract
Nanostructured hematite photoanodes have been intensively studied in photoelectrochemical (PEC) water splitting for sustainable hydrogen production. Whereas many previous efforts have been focused on doping elements in nanostructured hematite (α-Fe(2)O(3)), we herein demonstrated an alternative approach to enhance the PEC performance by exploiting intrinsic nanostructuring properties of hematite. We found that the introduction of lattice defects effectively decreased the flatband potential and increased the charge transport mobility of nanostructured hematite, hence enhance the light harvest for more efficient hydrogen production via PEC. The nanostructured hematite photoanodes with lattice defects yielded water-splitting photocurrent density of 1.2 mA/cm(2) at 1.6 V vs reversible hydrogen electrode (RHE), which excelled defect-free ones by approximately 1.5 folds. This study thus provides a new strategy for finely tuning properties of nanostructured hematite photoanodes and enhancing the water-splitting ability of PEC.
Related Papers
- → Fabrication of an Efficient BaTaO2N Photoanode Harvesting a Wide Range of Visible Light for Water Splitting(2013)224 cited
- → Hierarchically branched Fe2O3@TiO2nanorod arrays for photoelectrochemical water splitting: facile synthesis and enhanced photoelectrochemical performance(2016)92 cited
- → Bi-functional Fe2ZrO5 modified hematite photoanode for efficient solar water splitting(2020)49 cited
- → Effect of oxygen evolution catalysts on hematite nanorods for solar water oxidation(2011)53 cited
- → Reply to Comment on “Commercially Available WO3 Nanopowders for Photoelectrochemical Water Splitting: Photocurrent versus Oxygen Evolution”(2017)