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Boosting Photocatalytic Hydrogen Production by Modulating Recombination Modes and Proton Adsorption Energy
- Source :
- Dai, Y, Bu, Q, Sooriyagoda, R, Tavadze, P, Pavlic, O, Lim, T, Shen, Y, Mamakhel, A, Wang, X, Li, Y, Niemantsverdriet, H, Iversen, B B, Besenbacher, F, Xie, T, Lewis, J P, Bristow, A D, Lock, N & Su, R 2019, ' Boosting Photocatalytic Hydrogen Production by Modulating Recombination Modes and Proton Adsorption Energy ', Journal of Physical Chemistry Letters, vol. 10, no. 18, pp. 5381-5386 . https://doi.org/10.1021/acs.jpclett.9b01460
- Publication Year :
- 2019
- Publisher :
- American Chemical Society (ACS), 2019.
-
Abstract
- Solar-driven production of renewable energy (e.g., H2) has been investigated for decades. To date, the applications are limited by low efficiency due to rapid charge recombination (both radiative and nonradiative modes) and slow reaction rates. Tremendous efforts have been focused on reducing the radiative recombination and enhancing the interfacial charge transfer by engineering the geometric and electronic structure of the photocatalysts. However, fine-tuning of nonradiative recombination processes and optimization of target reaction paths still lack effective control. Here we show that minimizing the nonradiative relaxation and the adsorption energy of photogenerated surface-adsorbed hydrogen atoms are essential to achieve a longer lifetime of the charge carriers and a faster reaction rate, respectively. Such control results in a 16-fold enhancement in photocatalytic H2 evolution and a 15-fold increase in photocurrent of the crystalline g-C3N4 compared to that of the amorphous g-C3N4.
- Subjects :
- EFFICIENCY
Boosting (machine learning)
Materials science
Proton
CRYSTALLINE G-C3N4
02 engineering and technology
QUANTUM DOTS
010402 general chemistry
CDS
01 natural sciences
NANOPARTICLES
Radiative transfer
General Materials Science
Physical and Theoretical Chemistry
CARBON NITRIDE PHOTOCATALYST
Hydrogen production
business.industry
ELECTRON INJECTION
Charge (physics)
021001 nanoscience & nanotechnology
0104 chemical sciences
Renewable energy
Chemical physics
Photocatalysis
COCATALYSTS
0210 nano-technology
business
CHARGE SEPARATION
Recombination
GENERATION
Subjects
Details
- ISSN :
- 19487185
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- The Journal of Physical Chemistry Letters
- Accession number :
- edsair.doi.dedup.....48827e1f55f24c4cc0cd3ad5f449f7fb