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Interfacial Deposition of Ru(II) Bipyridine-Dicarboxylate Complexes by Ligand Substitution for Applications in Water Oxidation Catalysis

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.7b10809· OSTI ID:1470086
Water oxidation is a critical step in artificial photosynthesis and provides the protons and electrons used in reduction reactions to make solar fuels. Significant advances have been made in the area of molecular water oxidation catalysts with a notable breakthrough in the development of Ru(II) complexes that use a planar “bda” ligand (bda is 2,2'-bipyridine-6,6'-dicarboxylate). These Ru(II)(bda) complexes show lower overpotentials for driving water oxidation making them ideal for light-driven applications with a suitable chromophore. Nevertheless, synthesis of heterogeneous Ru(II)(bda) complexes remains challenging. We discuss here a new “bottom-up” synthetic method for immobilizing these catalysts at the surface of a photoanode for use in a dye-sensitized photoelectrosynthesis cell (DSPEC). The procedure provides a basis for rapidly screening the role of ligand variations at the catalyst in order to understand the impact on device performance. The best results of a water-oxidation DSPEC photoanode based on this procedure reached 1.4 mA/cm2 at pH 7 in 0.1 M [PO4H2]-/[PO4H]2- solution with minimal loss in catalytic behavior over 30 min, and produced an incident photon to current efficiency (IPCE) of 24.8% at 440 nm.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Solar Fuels (UNC EFRC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0001011
OSTI ID:
1470086
Journal Information:
Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 2 Vol. 140; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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  • Youngblood, W. Justin; Lee, Seung-Hyun Anna; Kobayashi, Yoji
  • Journal of the American Chemical Society, Vol. 131, Issue 3, p. 926-927 https://doi.org/10.1021/ja809108y
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Organoruthenium (II) complexes featuring pyrazole-linked Schiff base ligands: Crystal structure, DNA/BSA interactions, cytotoxicity and molecular docking: Half-sandwiched ruthenium complexes Pyrazole schiff base ligand journal January 2019
Quantum Chemical Study of the Mechanism of Water Oxidation Catalyzed by a Heterotrinuclear Ru 2 Mn Complex journal February 2019
Protected Hematite Nanorod Arrays with Molecular Complex Co-Catalyst for Efficient and Stable Photoelectrochemical Water Oxidation: Protected Hematite Nanorod Arrays with Molecular Complex Co-Catalyst for Efficient and Stable Photoelectrochemical Water Oxidation journal December 2018
Three dimensional carbon substrate materials for electrolysis of water journal June 2018
The development of molecular water oxidation catalysts journal April 2019
Angstrom Thick ZnO Passivation Layer to Improve the Photoelectrochemical Water Splitting Performance of a TiO2 Nanowire Photoanode: The Role of Deposition Temperature journal November 2018
Production of solar chemicals: gaining selectivity with hybrid molecule/semiconductor assemblies journal January 2018
Core–shell structured titanium dioxide nanomaterials for solar energy utilization journal January 2018
Dinuclear metal complexes: multifunctional properties and applications journal January 2020
Artificial photosynthesis: opportunities and challenges of molecular catalysts journal January 2019
P4VP–Ru II (bda) polyelectrolyte–metal complex as water oxidation catalyst: on the unique slow-diffusion and multi-charge effects of the polyelectrolyte ligand journal January 2018
A donor-chromophore-catalyst assembly for solar CO 2 reduction journal January 2019
Electron injection into titanium dioxide by panchromatic dirhodium photosensitizers with low energy red light journal January 2019
Improvement of dye-sensitized solar cell performances through introducing europium dye with multiple excitation: dual enhancement in light absorption journal January 2019
Light-driven water oxidation by a dye-sensitized photoanode with a chromophore/catalyst assembly on a mesoporous double-shell electrode journal January 2019
Stabilized photoanodes for water oxidation by integration of organic dyes, water oxidation catalysts, and electron-transfer mediators journal August 2018
A stable dye-sensitized photoelectrosynthesis cell mediated by a NiO overlayer for water oxidation journal September 2019
Inorganic Photochemistry and Solar Energy Harvesting: Current Developments and Challenges to Solar Fuel Production journal January 2019

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