Photoinduced Hydrogen Production Research Articles

Discovery and High-Throughput Screening of Heteroleptic Iridium Complexes for Photoinduced Hydrogen Production

The catalytic process of photoinduced hydrogen generation via the reduction of water has been investigated. The use of parallel synthetic techniques has facilitated the synthesis of a 32 member library of heteroleptic iridium complexes that was screened, using high-throughput photophysical techniques, to identify six potential photosensitizers for use in catalytic photoinduced hydrogen production. A Pd/Ni thin film hydrogen selective sensor allowed for rapid quantification of hydrogen produced via illumination of aqueous systems of the photosensitizer, tris(2,2'-dipyridyl)dichlorocobalt ([Co(bpy)(3)]Cl(2)), and triethanolamine (a sacrificial reductant) with ultra-bright light emitting diodes (LEDs). The use of an 8-well parallel photoreactor expedited the investigation of the hydrogen evolution process and facilitated mechanistic studies. All six compounds investigated produced considerably more hydrogen than commonly utilized photosensitizers and had relative quantum efficiencies of hydrogen production up to 37 times greater than that of Ru(bpy)(3)(2+).

04/00713 Effect of support on catalytic properties of Rh catalysts for steam reforming of 2-propanol: Mizuno, T. et al. International Journal of Hydrogen Energy, 2003, 28, (12), 1393–1399

Photoinduced hydrogen production with the system containing triethanolamine, zinc tetraphenylporphyrin tetrasulfonate, methylviologen and hydrogenase in various nonionic surfactant micellar was investigated. The effective photoreduction of methylviologen and an effective hydrogen production with hydrogenase were accomplished in the presence of various nonionic surfactants (Triton X-100, Triton X-305, Nonidet P-40, Triton N-101, Tween-20 and Tween-40) micellar system. Especially, the hydrogen production rate was increased by an addition of Tween-40 dramatically.

Photoinduced Hydrogen Production from Cellulose Derivative with Chlorophyll-a and Platinum Nanoparticles System

A photoinduced hydrogen production system, coupling cellulose hydrolysis by cellulase and glucose dehydrogenase (GDH) and hydrogen production with platinum nanoparticles as a catalyst using the visible light photosensitization of Mg chlorophyll-a (Mg Chl-a) from Spilurina, has been developed. When the sample solution containing cellulose derivative (methylcellulose), cellulase, nicotinamide adenine dinucleotide (NAD+), Mg Chl-a, methyl viologen (MV2+, an electron carrier reagent), and platinum nanoparticles was irradiated, continuous hydrogen production was observed with irradiation time. The amount of hydrogen production was about 12 μmol after 4 h irradiation.

Quasi-solid medium for photoinduced charge separation

New quasi-solid was proposed as a medium for photoinduced charge separation. Photoinduced charge separation and hydrogen production with the new quasi-solid medium using polysaccharide has been investigated. The new medium is a quasi-solid polysaccharide containing a large quantity of water. This medium is tight and elastic solid, obtained by cooling an aqueous solution of a polysaccharide (agarose or κ-carrageenan in this paper) to room temperature after it was dissolved in water by heating. When the quasi-solid (agarose or κ-carrageenan) involving sacrificial electron donor ethylenediaminetetraacetate (EDTA), tris(2,2′-bipyridine)ruthenium complex ([Ru(bpy) 3] 2+) and methylviologen (MV 2+) was irradiated with visible light, methylviologen cation radical (MV +) was formed. The formation rate of methylviologen cation radical in an agarose solid was faster than that in a κ-carrageenan one. Photoinduced hydrogen production was achieved with this system containing additionally proton reduction catalyst such as platinum black (Pt black), platinum oxide (PtO 2), and ruthenium oxide (RuO 2). The characteristics of this solid medium for photochemical reactions were discussed.

Effect of micellar species on photoinduced hydrogen production with Mg chlorophyll- a from spirulina and colloidal platinum

Effect of micellar species on the photostability of Mg chlorophyll- a and the photoinduced hydrogen production with Mg chlorophyll- a by use of three component system consisting of NADPH, methylviologen and colloidal platinum was investigated. Triton X-100 and CTAB solublized Mg chlorophyll- a solution were rapidly bleached by irradiation and 50% of Mg chlorophyll- a was degraded in 90 min irradiation. On the other hand, the decay rate of Mg chlorophyll- a concentration in the presence of NADPH was suppressed and the degradation rate was 15% in 90 min irradiation. The effective hydrogen production system was developed using CTAB solubilized Mg chlorophyll- a ( 2.7 μmol in 4 h ), compared with that using Triton X-100 solubilized Mg chlorophyll- a ( 0.1 μmol in 4 h) .

Photoinduced Hydrogen Production from D-Maltose in the Presence of Chlorophyll <I>a</I> and Pt Colloid

A hydrogen production system, coupling D-maltose hydrolysis by glucoamylase and glucose dehydrogenase (GDH) and hydrogen production with Pt colloid catalyst using light-induced photosensitization of Mg chlorophyll a (Mg Chl-a), was developed. Hydrogen gas was continuously produced when the reaction mixture containing D-maltose, glucoamylase, GDH, nicotinamide adenine dinucreotide (NAD+), Mg Chl-a, methylviologen (MV2+) and Pt colloid was irradiated by visible light. The amount of hydrogen production was estimated to be 5.0 μmol after 4 h irradiation and the yield of conversion of D-maltose to hydrogen gas was about 1.8%. The quantum yield was 3.1%.

Visible and near-IR light induced biohydrogen production using the system containing Mg chlorophyll-a from Spirulina and colloidal platinum.

Photoinduced hydrogen production with Mg chlorophyll-a from Spirulina as a visible and near-IR light photosensitizer by use of three component system consisting of nicotineamide adenine dinucleotide phosphate, reduced form (NADPH) as an electron donor, methylviologen as electron relay reagent and colloidal platinum as hydrogen production catalyst was investigated. After 4 h irradiation, the amount of hydrogen production with Mg chlorophyll-a and MgTPP, which was artificial model compound for chlorophyll, were c.a. 2.7 and 1.8 micromol, respectively. When the near-IR light was irradiated, little change of hydrogen production was observed. Thus, the effective visible and near IR light induced hydrogen production system with colloidal platinum was established using Mg chlorophyll-a.

Biohydrogen production from sucrose using the visible light sensitization of artificial Zn chlorophyll-a.

A photoinduced hydrogen production system that couples sucrose degradation with invertase and glucose dehydrogenase (GDH) and hydrogen production with colloidal platinum as a catalyst using visible light-induced photosensitization of artificial Zn chlorophyll-a (Zn Chl-a) has been developed. Continuous hydrogen gas production over more than 240 min was observed when the reaction mixture containing sucrose, invertase, GDH, nicotinamide adenine dinucreotide (NAD(+)), Zn Chl-a, methyl viologen (MV(2+), an electron relay reagent), and colloidal platinum was irradiated by visible light. Zn Chl-a was superior to that of Mg Chl-a in photostability and photosensitization activity.

Biomolecular device for photoinduced hydrogen production

In order to construct a molecular device for photoinduced hydrogen production, a model has been designed and first results in the framework of this multicomponent system are presented. This device should involve Photosystem 1, Photosystem 2 and hydrogenase in a modular configuration which allows to combine appropriate proteins from various—mainly thermophilic—organisms. Parts of this modular system can be easily exchanged and separately characterized and optimized. Here the optimization of one component of this device, the hydrogenase from Thiocapsa roseopersicina, is shown. The isolated hydrogenase was deposited as Langmuir–Blodgett (LB) film on quartz glass and ITO electrodes, respectively, and its activity was measured in dependence of counter ions, presence of oxygen and number of immobilized layers. While poly- L-lysine or poly-butyl-viologen as counter ion in the subphase stabilized the protein complex on quartz glass (up to about 30 mN/ m surface pressure), Ca 2+ resulted in a dramatic activity loss at a much lower surface pressure ( 15 mN/ m ). Also, the presence of even smallest amounts of oxygen or an excess amount of protein on an ITO electrode resulted in a significant decrease of the hydrogen production as did the increase in the number of layers—as shown by electrochemical measurements.

Visible light induced biohydrogen production from sucrose using the photosensitization of Mg chlorophyll-a.

A photoinduced hydrogen production system, coupling sucrose degradation with invertase and glucose dehydrogenase (GDH) and hydrogen production with colloidal platinum as a catalyst using the visible light-induced photosensitization of Mg chlorophyll-a (Mg Chl-a), has been developed. Continuous hydrogen gas production was observed when the reaction mixture containing sucrose, invertase, GDH, nicotinamide adenine dinucleotide (NAD(+)), Mg Chl-a, methyl viologen (MV(2+), an electron relay reagent), and colloidal platinum was irradiated by visible light.

Photoinduced Hydrogen Production from Sucrose with the Combination System of Water-soluble Zinc Porphyrin and Enzymes

Abstract Photoinduced hydrogen production from sucrose as an electron-donating reagent has been investigated. When the sample solution containing sucrose, invertase, glucose dehydrogenase, nicotinamide adenine dinucreotide (NAD+), zinc tetraphenylporphyrin tetrasulfonate (ZnTPPS), methylviologen and colloidal platinum was irradiated, continuous hydrogen production was observed.

Visible light induced hydrogen production with Mg chlorophyll-a from spirulina and colloidal platinum.

Photoinduced hydrogen production with Mg chlorophyll-a from spirulina as a visible light photosensitizer by use of three component system consisting of nicotineamide adenine dinucleotide phosphate, reduced form (NADPH) as an electron donor, methylviologen as electron relay reagent and colloidal platinum as hydrogen evolution catalyst was investigated. By the addition of NADPH, the photostability of Mg chlorophyll-a was increased. The effective visible-light induced hydrogen production system with colloidal platinum was established using Mg chlorophyll-a.

Photoinduced hydrogen production with the system containing water-soluble viologen-linked porphyrins and hydrogenase

Water-soluble viologen-linked cationic porphyrins (ZnP(C n V) 4, n=3–6) and anionic porphyrins (TPPSC n V, n=3–6) were synthesized and their photochemical properties were characterized. The quenching processes of the photoexcited state of porphyrin moiety by the bonded viologen were measured by fluorescence lifetime and laser flash photolysis, and photoinduced hydrogen evolution with ZnP(C n V) 4 or TPPSC n V and hydrogenase from Desulfovibrio vulgaris (Miyazaki) was performed under steady state irradiation.

Photoinduced hydrogen production with water-soluble zinc porphyrin and hydrogenase in nonionic surfactant micellar system

Photoinduced hydrogen production with the system containing triethanolamine, zinc tetraphenylporphyrin tetrasulfonate, methylviologen and hydrogenase in various nonionic surfactant micellar was investigated. The effective photoreduction of methylviologen and an effective hydrogen production with hydrogenase were accomplished in the presence of various nonionic surfactants (Triton X-100, Triton X-305, Nonidet P-40, Triton N-101, Tween-20 and Tween-40) micellar system. Especially, the hydrogen production rate was increased by an addition of Tween-40 dramatically.

Reply to the Comment on “Electron Source in Photoinduced Hydrogen Production on Pt-Supported TiO2 Particles”

ADVERTISEMENT RETURN TO ISSUEPREVCommentNEXTReply to the Comment on “Electron Source in Photoinduced Hydrogen Production on Pt-Supported TiO2 Particles”†Toshiyuki Abe, Eiji Suzuki, Kentaro Nagoshi, Kohichi Miyashita, and Masao KanekoView Author Information Faculty of Science, Ibaraki University, Mito, Ibaraki 310−8512, Japan, and Asakahigashi R & D Center, Honda R & D Co. Ltd., 3-15-1, Senzui, Asaka, Saitama 351-0024, Japan Cite this: J. Phys. Chem. B 2001, 105, 2, 597Publication Date (Web):December 7, 2000Publication History Received8 June 2000Published online7 December 2000Published inissue 1 January 2001https://doi.org/10.1021/jp002072iCopyright © 2001 American Chemical SocietyRIGHTS & PERMISSIONSArticle Views164Altmetric-Citations1LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (8 KB) Get e-AlertsSUBJECTS:Oxides,Photocatalysis,Photochemical reactions,Platinum,Transfer reactions Get e-Alerts

Comment on “Electron Source in Photoinduced Hydrogen Production on Pt-Supported TiO2 Particles”

ADVERTISEMENT RETURN TO ISSUEPREVCommentNEXTComment on “Electron Source in Photoinduced Hydrogen Production on Pt-Supported TiO2 Particles”Craig L. Perkins, Michael A. Henderson, David E. McCready, and Greg S. HermanView Author Information Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P.O. Box 999, MS K8-93, Richland, Washington 99352 Cite this: J. Phys. Chem. B 2001, 105, 2, 595–596Publication Date (Web):December 5, 2000Publication History Received15 May 2000Revised26 October 2000Published online5 December 2000Published inissue 1 January 2001https://doi.org/10.1021/jp001793eCopyright © 2001 American Chemical SocietyRIGHTS & PERMISSIONSArticle Views392Altmetric-Citations7LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (17 KB) Get e-AlertsSUBJECTS:Binding energy,Catalysts,Oxides,Physical and chemical processes,X-ray photoelectron spectroscopy Get e-Alerts

Photoinduced hydrogen production using a multilayered molecular assembly composed of zinc tetraphenylporphine and Nafion® membrane

Photoinduced hydrogen production using a multilayered molecular assembly composed of zinc tetraphenylporphine and Nafion® membrane

Electron Source in Photoinduced Hydrogen Production on Pt-Supported TiO2 Particles

Electron Source in Photoinduced Hydrogen Production on Pt-Supported TiO₂ Particles

Photoinduced hydrogen production using a multilayered molecular assembly composed of zinc tetraphenylporphine and Nafion� membrane

A photoinduced proton reduction to produce H2 was found to take place in the system using zinc tetraphenylporphine (ZnTPP) incorporated into a Nafion® membrane coated on a platinum electrode (denoted as Pt/Nf[ZnTPP]). When visible light (λ > 390 nm) was irradiated on the Pt/Nf[ZnTPP] system, a photocurrent was generated under applied potentials below −0.10 (v. Ag/AgCl). The action spectrum for the photocurrent agreed with the absorption spectrum of the Nf[ZnTPP] membrane, showing that the present photochemical process is induced on light absorption by the ZnTPP. By measuring the emission decay of ZnTPP under the photoelectrochemical conditions, it was exhibited that the emission from the singlet excited ZnTPP is quenched by the cathodic potentials. The amount of the H2 produced increased with the cathodic potentials. These results indicated that, in the photochemical primary process, a reductive quenching takes place by electron injection from the Pt electrode to the singlet excited ZnTPP forming ZnTPP.–, subsequently leading to the H2 formation by a bimolecular catalysis of the ZnTPP. Copyright © 2000 John Wiley & Sons, Ltd.

Photoinduced hydrogen production from aqueous solution—Frontiers and new trends

Different possible pathways for the photochemical conversion of light energy, based on light induced electron transfer are described. Selective catalysis with homogeneous H 2 catalysts are proposed as improvement for the light induced hydrogen formation. Two novel Co(II)polypyridinium (Co(pdt) 3 2+ and Co(tpp) 2 2+) catalysts have been developed and were successfully used as homogeneous catalysts for light induced hydrogen production with Ru(bpy) 3 2+ as a photosensitizer and ascorbic acid as a sacrificial electron donor. Initial quantum yields ( φ 1 2 H2 ) were up to 20% for Co(pdt) 3 2+.