Enhanced photocatalytic hydrogen generation with Pt Nanoparticles on multi-phase polycrystalline microporous MnO2 photocatalyst

2013 ◽  
Vol 223 ◽  
pp. 107-113 ◽  
Author(s):  
Yi-Hao Pai ◽  
Chih-Teng Tsai ◽  
Su-Yun Fang
Keyword(s):  
Hydrogen Generation ◽  
Pt Nanoparticles ◽  
Photocatalytic Hydrogen Generation ◽  
Multi Phase

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.

scholarly journals Facet-Dependent Activity of Pt Nanoparticles as Cocatalyst on TiO2Photocatalyst for Dye-Sensitized Visible-Light Hydrogen Generation

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Entian Cui ◽  
Guihua Hou ◽  
Rong Shao ◽  
Rongfeng Guan
Keyword(s):  
Visible Light ◽  
Surface Structure ◽  
Hydrogen Generation ◽  
Pt Nanoparticles ◽  
Dye Sensitized ◽  
Photocatalytic Hydrogen Generation ◽  
Photocatalytic Activities ◽  
Dependent Activity ◽  
The Difference ◽  
Apparent Activation Energies

The photocatalytic activities of polyoriented and preferential Pt(111) nanoparticles supported on TiO2(Pt(poly)/TiO2and Pt(111)/TiO2) were investigated by the photocatalytic hydrogen generation from water under visible-light irradiation. The photocatalytic hydrogen production rate of Pt(111)/TiO2was 1.6 times higher than that of Pt(poly)/TiO2. The corresponding apparent activation energy on Pt(111)/TiO2was about 2.39 KJ/mol, while on Pt(poly)/TiO2, it was about 4.83 KJ/mol. The difference in the apparent activation energies was probably due to the diversity in the number of surface atoms at corners and edges between the Pt(poly) and Pt(111) nanoparticles. The photocurrent of Pt(111)/TiO2was also bigger than that of Pt(poly)/TiO2, implying that the surface structure of Pt(111) nanoparticles can improve the transfer efficiency of photo-induced electrons from the conduction band of TiO2to Pt nanoparticles. As a result, the surface structure of Pt nanoparticles played an important role in the reactivity and kinetics performance of hydrogen evolution. Therefore, the photocatalytic properties of Pt/TiO2strongly depended on the surface structure of Pt nanoparticles.

A dehydrobenzoannulene-based three dimensional graphdiyne for photocatalytic hydrogen generation using Pt nanoparticles as a co-catalyst and triethanolamine as a sacrificial electron donor

2020 ◽  
Vol 8 (9) ◽  
pp. 4850-4855 ◽  
Author(s):  
Han Shen ◽  
Weixiang Zhou ◽  
Feng He ◽  
Yanan Gu ◽  
Yongjun Li ◽  
...  
Keyword(s):  
Electron Donor ◽  
Hydrogen Generation ◽  
Three Dimensional ◽  
Pt Nanoparticles ◽  
Co Catalyst ◽  
Photocatalytic Hydrogen Generation ◽  
Good Ability

A helical fiber-like structure from a three dimensional arrangement of an alkyne exhibits good ability for photocatalytic hydrogen generation using a Pt co-catalyst.

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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