Photoinduced hydrogen evolution with lysine-linked viologen and hydrogenase

Lysine-linked viologen was prepared as a substrate for the hydrogenase. By using reduced lysine-linked viologen ( LysV +•), the hydrogenase- LysV +• complex was formed efficiently, leading to effective hydrogen evolution compared with methyl viologen. Lysine-linked viologen as an electron carrier was applied for the photoinduced hydrogen evolution system containing hydrogenase, Tetrakis(4-carboxyphenyl)porphyrin ( TCPP ) as a photosensitizer, and a sacrificial electron donor for TCPP . In this system, effective photoinduced hydrogen evolution was observed.

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Photocatalytic Hydrogen Evolution Using 9-Phenyl-10-methyl-acridinium Ion Derivatives as Efficient Electron Mediators and Ru-Based Catalysts

Australian Journal of Chemistry ◽

10.1071/ch12294 ◽

2012 ◽

Vol 65 (12) ◽

pp. 1573 ◽

Cited By ~ 7

Author(s):

Yusuke Yamada ◽

Kentaro Yano ◽

Shunichi Fukuzumi

Keyword(s):

Metal Oxide ◽

Hydrogen Evolution ◽

Electron Donor ◽

Carboxy Group ◽

Reaction System ◽

Evolution Rate ◽

Evolution System ◽

Electron Mediator ◽

Photocatalytic Hydrogen Evolution ◽

Hydrogen Evolution Rate

Photocatalytic hydrogen evolution has been performed by photoirradiation (λ > 420 nm) of a mixed solution of a phthalate buffer and acetonitrile (MeCN) (1 : 1 (v/v)) containing EDTA disodium salt (EDTA), [RuII(bpy)3]2+ (bpy = 2,2′-bipyiridine), 9-phenyl-10-methylacridinium ion (Ph–Acr+–Me), and Pt nanoparticles (PtNPs) as a sacrificial electron donor, a photosensitiser, an electron mediator, and a hydrogen-evolution catalyst, respectively. The hydrogen-evolution rate of the reaction system employing Ph–Acr+–Me as an electron mediator was more than 10 times higher than that employing a conventional electron mediator of methyl viologen. In this reaction system, ruthenium nanoparticles (RuNPs) also act as a hydrogen-evolution catalyst as well as the PtNPs. The immobilization of the efficient electron mediator on the surface of a hydrogen-evolution catalyst is expected to enhance the hydrogen-evolution rate. The methyl group of Ph–Acr+–Me was chemically modified with a carboxy group (Ph–Acr+–CH2COOH) to interact with metal oxide surfaces. In the photocatalytic hydrogen-evolution system using Ph–Acr+–CH2COOH and Pt-loaded ruthenium oxide nanoparticles (Pt/RuO2NPs) as electron donor and hydrogen-evolution catalyst, respectively, the hydrogen-evolution rate was 1.5–2 times faster than the reaction system using Ph–Acr+–Me as an electron mediator. On the other hand, no enhancement in the hydrogen-evolution rate was observed in the reaction system using Ph–Acr+–CH2COOH with PtNPs. Thus, the enhancement of hydrogen-evolution rate originated from the favourable interaction between Ph–Acr+–CH2COOH and RuO2NPs. These results suggest that the use of Ph–Acr+–Me as an electron mediator enables the photocatalytic hydrogen evolution using PtNPs and RuNPs as hydrogen-evolution catalysts, and the chemical modification of Ph–Acr+–Me with a carboxy group paves the way to utilise a supporting catalyst, Pt loaded on a metal oxide, as a hydrogen-evolution catalyst.

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Novel high stable electrocatalyst based on non-stoichiometric nanocrystalline niobium carbide toward effective hydrogen evolution

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2021.01.223 ◽

2021 ◽

Vol 46 (32) ◽

pp. 16907-16916

Author(s):

M.I. Chebanenko ◽

D.P. Danilovich ◽

A.A. Lobinsky ◽

V.I. Popkov ◽

A.A. Rempel ◽

...

Keyword(s):

Hydrogen Evolution ◽

Niobium Carbide ◽

Effective Hydrogen

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DNA Enthralled Less Resistive Palladium Nano-Spheres for Effective Hydrogen Evolution Reaction

Catalysis Science & Technology ◽

10.1039/d1cy00986a ◽

2021 ◽

Author(s):

K. Sangeetha ◽

Karthik Kumaran Saravanan ◽

Eunice Evangeline Bariki ◽

Vennala Niharika ◽

Rishivandhiga Jayakumar ◽

...

Keyword(s):

Hydrogen Evolution ◽

Hydrogen Evolution Reaction ◽

Deoxyribonucleic Acid ◽

Size And Shape ◽

Shape Controlled ◽

Effective Hydrogen

The greener entry of biomolecules in the field of nanomaterials (NMs) synthesis effectively supports to develop various size and shape controlled NMs in numerous applications. In this line, Deoxyribonucleic acid...

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