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 journalArticlepeer-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 languageEnglish
Pages (from-to)2592-2597
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume41
Issue number4
DOIs
Publication statusPublished - 30 Jan 2016

Keywords

  • Catalyst design
  • Hydrogen evolution
  • Iridium
  • Pyridine derivatives
  • Rhodium

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