A New Strategy for Solar‐to‐Hydrogen Energy Conversion: Photothermal‐Promoted Electrocatalytic Water Splitting

2019 ◽  
Vol 6 (10) ◽  
pp. 2762-2765 ◽  
Author(s):  
Jing Qi ◽  
Wei Zhang ◽  
Rui Cao
Keyword(s):  
Energy Conversion ◽  
Water Splitting ◽  
Hydrogen Energy ◽  
New Strategy

scholarly journals Sequential cocatalyst decoration on BaTaO2N towards highly-active Z-scheme water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zheng Wang ◽  
Ying Luo ◽  
Takashi Hisatomi ◽  
Junie Jhon M. Vequizo ◽  
Sayaka Suzuki ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Water Splitting ◽  
Energy Conversion Efficiency ◽  
Hydrogen Energy ◽  
Apparent Quantum Yield ◽  
Intimate Contact ◽  
Single Crystalline ◽  
Highly Active ◽  
Uniform Dispersion ◽  
Solar Hydrogen Production

AbstractOxynitride photocatalysts hold promise for renewable solar hydrogen production via water splitting owing to their intense visible light absorption. Cocatalyst loading is essential for activation of such oxynitride photocatalysts. However, cocatalyst nanoparticles form aggregates and exhibit weak interaction with photocatalysts, which prevents eliciting their intrinsic photocatalytic performance. Here, we demonstrate efficient utilization of photoexcited electrons in a single-crystalline particulate BaTaO2N photocatalyst prepared with the assistance of RbCl flux for H2 evolution reactions via sequential decoration of Pt cocatalyst by impregnation-reduction followed by site-selective photodeposition. The Pt-loaded BaTaO2N photocatalyst evolves H2 over 100 times more efficiently than before, with an apparent quantum yield of 6.8% at the wavelength of 420 nm, from a methanol aqueous solution, and a solar-to-hydrogen energy conversion efficiency of 0.24% in Z-scheme water splitting. Enabling uniform dispersion and intimate contact of cocatalyst nanoparticles on single-crystalline narrow-bandgap particulate photocatalysts is a key to efficient solar-to-chemical energy conversion.

Integrating a redox flow battery into a Z-scheme water splitting system for enhancing the solar energy conversion efficiency

2019 ◽  
Vol 12 (2) ◽  
pp. 631-639 ◽  
Author(s):  
Zhen Li ◽  
Wangyin Wang ◽  
Shichao Liao ◽  
Mingyao Liu ◽  
Yu Qi ◽  
...  
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Water Splitting ◽  
Conversion Efficiency ◽  
Solar Energy Conversion ◽  
Energy Conversion Efficiency ◽  
Hydrogen Energy ◽  
Redox Flow Battery ◽  
Solar Energy Conversion Efficiency ◽  
Splitting System

A RFB-integrated Z-scheme water splitting system produces hydrogen energy and electricity for efficient solar energy conversion.

Solar-to-Hydrogen Energy Conversion Based on Water Splitting

2017 ◽  
Vol 8 (5) ◽  
pp. 1701620 ◽  
Author(s):  
Jing Qi ◽  
Wei Zhang ◽  
Rui Cao
Keyword(s):  
Energy Conversion ◽  
Water Splitting ◽  
Hydrogen Energy

Scalable water splitting on particulate photocatalyst sheets with a solar-to-hydrogen energy conversion efficiency exceeding 1%

2016 ◽  
Vol 15 (6) ◽  
pp. 611-615 ◽  
Author(s):  
Qian Wang ◽  
Takashi Hisatomi ◽  
Qingxin Jia ◽  
Hiromasa Tokudome ◽  
Miao Zhong ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Water Splitting ◽  
Conversion Efficiency ◽  
Energy Conversion Efficiency ◽  
Hydrogen Energy

scholarly journals Experimental study on the effects of light intensity on energy conversion efficiency of photo-thermo chemical synergetic catalytic water splitting

2018 ◽  
Vol 22 (Suppl. 2) ◽  
pp. 709-718
Author(s):  
Ziming Cheng ◽  
Ruitian Yu ◽  
Fuqiang Wang ◽  
Huaxu Liang ◽  
Bo Lin ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Light Intensity ◽  
Energy Conversion ◽  
Water Splitting ◽  
Energy Conversion Efficiency ◽  
Hydrogen Energy ◽  
Optical Losses ◽  
Full Spectrum ◽  
Solar Water ◽  
Solar Water Splitting

Hydrogen production from water using a catalyst and solar energy was an ideal future fuel source. In this study, an elaborate experimental test rig of hydrogen production from solar water splitting was designed and established with self- controlled temperature system. The effects of light intensity on the reaction rate of hydrogen production from solar water splitting were experimentally investigated with the consideration of optical losses, reaction temperature, and photocatalysts powder cluster. Besides, a revised expression of full-spectrum solar-to-hydrogen energy conversion efficiency with the consideration of optical losses was also put forward, which can be more accurate to evaluate the full-spectrum solar-to-hydrogen energy of photo-catalysts powders. The results indicated that optical losses of solar water splitting reactor increased with the increase of the incoming light intensity, and the hydrogen production rate increased linearly with the increase of effective light intensity even at higher light intensity region when the optical losses of solar water splitting reactor were considered.

AA- and ABA-stacked carbon nitride (C3N4): novel photocatalytic water splitting solar-to-hydrogen energy conversion

2018 ◽  
Vol 20 (35) ◽  
pp. 22972-22979 ◽  
Author(s):  
A. H. Reshak
Keyword(s):  
Energy Conversion ◽  
Water Splitting ◽  
Carbon Nitride ◽  
Hydrogen Energy ◽  
Photocatalytic Water Splitting

We report the development of the C3N4 structure by integrating two different structures: (i) two identical layers as AA-stacked C3N4 and (ii) intercalating one different layer between two identical layers as ABA-stacked C3N4.

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