Photocatalytic hydrogen evolution by iridium(III)-rhodium(III) system: Effect of the free ligand addition

D. B. Vasilchenko; S. V. Tkachev; A. Yu Kurenkova; E. A. Kozlova; D. V. Kozlov

doi:10.1016/j.ijhydene.2015.12.096

Photocatalytic hydrogen evolution by iridium(III)-rhodium(III) system: Effect of the free ligand addition

D. B. Vasilchenko, S. V. Tkachev, A. Yu Kurenkova, E. A. Kozlova, D. V. Kozlov

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Rh(III) complexes of the general form {RhL₄Cl₂} with pyridine derivatives ligands (L) were used for the first time as water reduction catalysts in photocatalytic hydrogen generation process in pair with [Ir(ppy)₂bpy]⁺ complex as a photosynthesizer. The efficiency of given Ir(III)-Rh(III) systems in the photocatalytic hydrogen generation process was found to be on the level of 20-30% which is corresponding to the highest currently achieved quantum efficiency values for homogeneous photocatalysts. Fast deactivation of the systems due to destruction of {RhL₄Cl₂} units was observed but it was suppressed via addition of extra amount of free L ligand in the reaction mixture. Quantum efficiency of modified in this manner [Ir(ppy)₂bpy]⁺/{RhL₄Cl₂} systems achieved up to 80% value.

Original language	English
Pages (from-to)	2592-2597
Number of pages	6
Journal	International Journal of Hydrogen Energy
Volume	41
Issue number	4
DOIs	https://doi.org/10.1016/j.ijhydene.2015.12.096
Publication status	Published - 30 Jan 2016

Keywords

Catalyst design
Hydrogen evolution
Iridium
Pyridine derivatives
Rhodium

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10.1016/j.ijhydene.2015.12.096

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@article{b3b12131c97144c6837d44fe429c5783,

title = "Photocatalytic hydrogen evolution by iridium(III)-rhodium(III) system: Effect of the free ligand addition",

abstract = "Rh(III) complexes of the general form {RhL4Cl2} with pyridine derivatives ligands (L) were used for the first time as water reduction catalysts in photocatalytic hydrogen generation process in pair with [Ir(ppy)2bpy]+ complex as a photosynthesizer. The efficiency of given Ir(III)-Rh(III) systems in the photocatalytic hydrogen generation process was found to be on the level of 20-30% which is corresponding to the highest currently achieved quantum efficiency values for homogeneous photocatalysts. Fast deactivation of the systems due to destruction of {RhL4Cl2} units was observed but it was suppressed via addition of extra amount of free L ligand in the reaction mixture. Quantum efficiency of modified in this manner [Ir(ppy)2bpy]+/{RhL4Cl2} systems achieved up to 80% value.",

keywords = "Catalyst design, Hydrogen evolution, Iridium, Pyridine derivatives, Rhodium",

author = "Vasilchenko, {D. B.} and Tkachev, {S. V.} and Kurenkova, {A. Yu} and Kozlova, {E. A.} and Kozlov, {D. V.}",

year = "2016",

month = jan,

day = "30",

doi = "10.1016/j.ijhydene.2015.12.096",

language = "English",

volume = "41",

pages = "2592--2597",

journal = "International Journal of Hydrogen Energy",

issn = "0360-3199",

publisher = "Elsevier Ltd",

number = "4",

}

TY - JOUR

T1 - Photocatalytic hydrogen evolution by iridium(III)-rhodium(III) system

T2 - Effect of the free ligand addition

AU - Vasilchenko, D. B.

AU - Tkachev, S. V.

AU - Kurenkova, A. Yu

AU - Kozlova, E. A.

AU - Kozlov, D. V.

PY - 2016/1/30

Y1 - 2016/1/30

N2 - Rh(III) complexes of the general form {RhL4Cl2} with pyridine derivatives ligands (L) were used for the first time as water reduction catalysts in photocatalytic hydrogen generation process in pair with [Ir(ppy)2bpy]+ complex as a photosynthesizer. The efficiency of given Ir(III)-Rh(III) systems in the photocatalytic hydrogen generation process was found to be on the level of 20-30% which is corresponding to the highest currently achieved quantum efficiency values for homogeneous photocatalysts. Fast deactivation of the systems due to destruction of {RhL4Cl2} units was observed but it was suppressed via addition of extra amount of free L ligand in the reaction mixture. Quantum efficiency of modified in this manner [Ir(ppy)2bpy]+/{RhL4Cl2} systems achieved up to 80% value.

AB - Rh(III) complexes of the general form {RhL4Cl2} with pyridine derivatives ligands (L) were used for the first time as water reduction catalysts in photocatalytic hydrogen generation process in pair with [Ir(ppy)2bpy]+ complex as a photosynthesizer. The efficiency of given Ir(III)-Rh(III) systems in the photocatalytic hydrogen generation process was found to be on the level of 20-30% which is corresponding to the highest currently achieved quantum efficiency values for homogeneous photocatalysts. Fast deactivation of the systems due to destruction of {RhL4Cl2} units was observed but it was suppressed via addition of extra amount of free L ligand in the reaction mixture. Quantum efficiency of modified in this manner [Ir(ppy)2bpy]+/{RhL4Cl2} systems achieved up to 80% value.

KW - Catalyst design

KW - Hydrogen evolution

KW - Iridium

KW - Pyridine derivatives

KW - Rhodium

UR - http://www.scopus.com/inward/record.url?scp=84957840583&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2015.12.096

DO - 10.1016/j.ijhydene.2015.12.096

M3 - Article

AN - SCOPUS:84957840583

VL - 41

SP - 2592

EP - 2597

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 4

ER -

Photocatalytic hydrogen evolution by iridium(III)-rhodium(III) system: Effect of the free ligand addition

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Keywords

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