Mechanism of Photocatalytic Hydrogen Generation by a Polypyridyl-Based Cobalt Catalyst in Aqueous Solution

2014 ◽  
Vol 54 (2) ◽  
pp. 646-657 ◽  
Author(s):  
Alexander Rodenberg ◽  
Margherita Orazietti ◽  
Benjamin Probst ◽  
Cyril Bachmann ◽  
Roger Alberto ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Cobalt Catalyst ◽  
Hydrogen Generation ◽  
Photocatalytic Hydrogen Generation

scholarly journals Synthesis of n-Alkoxy Derivatives of Layered Perovskite-Like Niobate HCa2Nb3O10 and Study of Their Photocatalytic Activity for Hydrogen Production from an Aqueous Solution of Methanol

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 897
Author(s):  
Vladimir V. Voytovich ◽  
Sergey A. Kurnosenko ◽  
Oleg I. Silyukov ◽  
Ivan A. Rodionov ◽  
Alexander N. Bugrov ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Hydrogen Generation ◽  
Pt Nanoparticles ◽  
Layered Compounds ◽  
Layered Perovskite ◽  
Primary Alcohols ◽  
Absorption Region ◽  
Photocatalytic Hydrogen Generation ◽  
Alkoxy Groups

A series of hybrid inorganic–organic niobates HCa2Nb3O10×ROH, containing n-alkoxy groups of primary alcohols (R = Me, Et, Pr, Bu, Hx, and Dc) grafted in the interlayer space, has been studied for the first time in relation to photocatalytic hydrogen generation from a model 1 mol % aqueous solution of methanol under ultraviolet irradiation. Photocatalytic activity was measured both for bare samples and for their composites with Pt nanoparticles as a cocatalyst. The advanced measurement scheme allowed monitoring the volume concentration of a sample in a suspension during the experiment, its pH, and possible exfoliation of layered compounds into nanolayers. In the series of n-alkoxy derivatives, the maximum rate of hydrogen evolution was achieved over a Pt-loaded ethoxy derivative HCa2Nb3O10×EtOH/Pt. Its apparent quantum efficiency of 20.6% in the 220–350 nm range was found not to be caused by changes in the light absorption region or specific surface area upon ethanol grafting. Moreover, the amounts of hydrogen released during the measurements significantly exceeded those of interlayer organic components, indicating that hydrogen is generated from the reaction solution rather than from the hybrid material.

Direct synthesis of all-inorganic heterostructured CdSe/CdS QDs in aqueous solution for improved photocatalytic hydrogen generation

2017 ◽  
Vol 5 (21) ◽  
pp. 10365-10373 ◽  
Author(s):  
Zhi-Jun Li ◽  
Xiang-Bing Fan ◽  
Xu-Bing Li ◽  
Jia-Xin Li ◽  
Fei Zhan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Generation ◽  
Direct Synthesis ◽  
Photocatalytic Hydrogen Generation ◽  
Cds Qds

A facile aqueous approach is developed to synthesize heterostructured CdSe/CdS QDs for advanced hydrogen photosynthesis.

Photocatalytic hydrogen generation using mesoporous silicon nanoparticles: influence of magnesiothermic reduction conditions and nanoparticle aging on the catalytic activity

Nanoscale ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 2685-2692
Author(s):  
Isabel S. Curtis ◽  
Ryan J. Wills ◽  
Mita Dasog
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Production ◽  
Silicon Nanoparticles ◽  
Hydrogen Generation ◽  
Oxide Content ◽  
Magnesiothermic Reduction ◽  
Mesoporous Silicon ◽  
High Crystallinity ◽  
Photocatalytic Hydrogen Generation

High crystallinity, low oxide content, and low sintering lead to optimally performing mesoporous Si photocatalysts for solar-driven hydrogen production.

Synthesis of disorder–order TaON homojunction for photocatalytic hydrogen generation under visible light

2021 ◽  
Vol 56 (16) ◽  
pp. 9791-9806
Author(s):  
Jinsheng Yan ◽  
Lanqing Hu ◽  
Lingkai Cui ◽  
Qianqian Shen ◽  
Xuguang Liu ◽  
...  
Keyword(s):  
Visible Light ◽  
Hydrogen Generation ◽  
Photocatalytic Hydrogen Generation

scholarly journals Zn0.8Cd0.2S Hollow Spheres with a Highly Dispersed Ni Dopant for Boosting Photocatalytic Hydrogen Generation

ACS Omega ◽  
2021 ◽  
Author(s):  
Ying Luo ◽  
Xiaohui Zhang ◽  
Cheng Huang ◽  
Xiaole Han ◽  
Qingqing Jiang ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Hollow Spheres ◽  
Photocatalytic Hydrogen Generation ◽  
Highly Dispersed ◽  
Ni Dopant
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