Photocatalytic production of hydrogen from aqueous solution containing CN− as a hole scavenger

2001 ◽  
Vol 207 (1-2) ◽  
pp. 173-181 ◽  
Author(s):  
Sang Gi Lee ◽  
Sangwha Lee ◽  
Ho-In Lee
Keyword(s):  
Aqueous Solution ◽  
Production Of Hydrogen ◽  
Hole Scavenger

Photooxidation at Platinum Colloidal TiO2 Aqueous-Solution Interfaces. I. Ethylenediaminetetraacetic Acid and Related-Compounds

1986 ◽  
Vol 39 (5) ◽  
pp. 757 ◽  
Author(s):  
DN Furlong ◽  
D Wells ◽  
WHF Sasse
Keyword(s):  
Carbon Dioxide ◽  
Aqueous Solution ◽  
Ethylenediaminetetraacetic Acid ◽  
Oxidation Potential ◽  
Illumination Time ◽  
Carbonium Ions ◽  
Production Of Hydrogen ◽  
Glycine Derivatives ◽  
Lactic Acids ◽  
Exhaustive Oxidation

The photooxidation of ethylenediaminetetraacetic acid ( edta ) and related glycine derivatives, at Pt/TiO2/aqueous solution interfaces, has been monitored via the production of hydrogen and carbon dioxide. Yields are consistent with the exhaustive oxidation of methoxycarbonyl groups and the rate varied with the number and distribution of such groups. A photooxidation pathway is proposed which involves the oxidation of intermediate carbonium ions. Plausible molecular intermediates, such as formic acid and formaldehyde in the case of edta , have been shown in separate experiments to be photooxidized according to the proposed pathway. The maximum rate of oxidation for each donor depends on its oxidation potential and its tendency to adsorb on TiO2 surfaces. Desorption due to pH increase, as well as consumption of the donor, causes the rate to decline rapidly with illumination time. Acetic and malonic acids gave some hydrogen but underwent mainly (> c. 80%) photo-Kolbe decarboxylation to yield carbon dioxide and methane. By contrast the oxidation of oxomalonic, pyruvic and lactic acids proceeded mainly via a H2 producing pathway similar to that established for edta. The oxidation of pyruvic and lactic acids ceased at a yield of one mole of CO2 per mole of acid.

scholarly journals Effect of the chloride ion as a hole scavenger on the photocatalytic conversion of CO2 in an aqueous solution over Ni–Al layered double hydroxides

2015 ◽  
Vol 17 (27) ◽  
pp. 17995-18003 ◽  
Author(s):  
Shoji Iguchi ◽  
Kentaro Teramura ◽  
Saburo Hosokawa ◽  
Tsunehiro Tanaka
Keyword(s):  
Aqueous Solution ◽  
Layered Double Hydroxides ◽  
Oxidation Product ◽  
Chloride Ion ◽  
Hole Scavenger ◽  
Double Hydroxides

The photocatalytic conversion of CO2 to CO using a Ni–Al LDH photocatalyst in an aqueous solution of NaCl was investigated. HClO was produced as an oxidation product of Cl− under photoirradiation.

Solar energy storage. Production of hydrogen by 546-nm irradiation of a dinuclear rhodium(I) complex in acidic aqueous solution

1977 ◽  
Vol 99 (16) ◽  
pp. 5525-5526 ◽  
Author(s):  
Kent R. Mann ◽  
Nathan S. Lewis ◽  
Vincent M. Miskowski ◽  
David K. Erwin ◽  
George S. Hammond ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Energy Storage ◽  
Solar Energy ◽  
Acidic Aqueous Solution ◽  
Solar Energy Storage ◽  
Production Of Hydrogen

Efficient photochemical production of hydrogen in aqueous solution by simply incorporating a water-insoluble hydrogenase mimic into a hydrogel

2014 ◽  
Vol 2 (48) ◽  
pp. 20500-20505 ◽  
Author(s):  
Tianjun Yu ◽  
Yi Zeng ◽  
Jinping Chen ◽  
Xiaohui Zhang ◽  
Guoqiang Yang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
High Efficiency ◽  
Photochemical Production ◽  
Production Of Hydrogen

A water-insoluble hydrogenase mimic has been successively applied to the photochemical production of hydrogen in aqueous solution with high efficiency and activity by simply incorporating the mimic into the PVP hydrogel.

scholarly journals The Role of Surface Texture on the Photocatalytic H2 Production on TiO2

Catalysts ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 32 ◽  
Author(s):  
Francesco Pellegrino ◽  
Fabrizio Sordello ◽  
Marco Minella ◽  
Claudio Minero ◽  
Valter Maurino
Keyword(s):  
Hydrogen Production ◽  
H2 Production ◽  
Hydrogen Production Rate ◽  
Environmental Implications ◽  
Production Of Hydrogen ◽  
Hole Scavenger ◽  
Sacrificial Agent ◽  
The One ◽  
Intensive Work

It has been often reported that an efficient and green photocatalytic dissociation of water under irradiated semiconductors likely represents the most important goal for modern chemistry. Despite decades of intensive work on this topic, the efficiency of the water photolytic process under irradiated semiconductors is far from reaching significant photocatalytic efficiency. The use of a sacrificial agent as hole scavenger dramatically increases the hydrogen production rate and might represent the classic “kill two birds with one stone”: on the one hand, the production of hydrogen, then usable as energy carrier, on the other, the treatment of water for the abatement of pollutants used as sacrificial agents. Among metal oxides, TiO2 has a central role due to its versatility and inexpensiveness that allows an extended applicability in several scientific and technological fields. In this review we focus on the hydrogen production on irradiated TiO2 and its fundamental and environmental implications.

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