Journal
ACS CATALYSIS
Volume 11, Issue 3, Pages 1242-1247Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.0c05436
Keywords
solar water splitting; magnetic field; nonradiative recombination; photoelectrode; magnet
Categories
Funding
- NSF of China [41702037, 41831285, 41877323, 41872039]
- Project of State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology [18fksy0216, 20fksy17]
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The use of magnetic field assistance is a more effective approach in improving the activity of photoelectrodes for solar water splitting compared to conventional PEC water splitting. It provides a new, effective, and general strategy to enhance the efficiency of photoelectrodes for solar water splitting and other PEC reactions.
The manipulation of photoelectrodes' electron-hole pairs toward low recombination is the fundamental strategy to achieve high solar-to-hydrogen conversion efficiency in photoelectrochemical (PEC) water splitting cells. Herein, we demonstrate that a magnet placed parallel to a photoelectrode can improve the water splitting activity of typical BiVO4 and alpha-Fe2O3 photoanodes as well as Cu2O/CuO and p-Si(111) photocathodes by restraining the nonradiative recombination of their carrier. Our investigations indicate that magnetic field-assisted PEC water splitting is a more effective approach than the conventional PEC water splitting. Magnetic field assistance provides a new, effective, and general strategy to improve the activity of photoelectrodes for solar water splitting and the other PEC reactions.
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