skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Optimization of Photoanodes for Photocatalytic Water Oxidation by Combining a Heterogenized Iridium Water‐Oxidation Catalyst with a High‐Potential Porphyrin Photosensitizer

Journal Article · · ChemSusChem

Abstract The development of water‐splitting dye‐sensitized photoelectrochemical cells has gained interest owing to their ability to generate renewable fuels from solar energy. In this study, photoanodes were assembled from a SnO 2 film sensitized with a combination of a high‐potential CF 3 ‐substituted porphyrin dye with a tetrahydropyranyl‐protected hydroxamic acid surface‐anchoring group and a Cp*Ir (Cp*=pentamethylcyclopentadienyl) water‐oxidation catalyst containing a silatrane anchoring group. The dye/catalyst ratios were varied from 2:1 to 32:1 to optimize the photocatalytic water oxidation. Photoelectrochemical measurements showed not only more stable and reproducible photocurrents for lower dye/catalyst ratios but also improved photostability. O 2 production was confirmed in real time over a 20 h period with a Clark electrode. Photoanodes prepared from 2:1 and 8:1 dye/catalyst sensitization solutions provided the most active electrodes for photocatalytic water oxidation and performed approximately 30–35 turnovers in 20 h.

Sponsoring Organization:
USDOE
OSTI ID:
1402095
Journal Information:
ChemSusChem, Journal Name: ChemSusChem Vol. 10 Journal Issue: 22; ISSN 1864-5631
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

References (43)

Light-driven water oxidation for solar fuels journal November 2012
Silatranes for binding inorganic complexes to metal oxide surfaces journal January 2015
Design and development of photoanodes for water-splitting dye-sensitized photoelectrochemical cells journal January 2013
Structure–Property Relationships in Phosphonate-Derivatized, Ru II Polypyridyl Dyes on Metal Oxide Surfaces in an Aqueous Environment journal July 2012
Finding the Way to Solar Fuels with Dye-Sensitized Photoelectrosynthesis Cells journal September 2016
Water Oxidation by an Electropolymerized Catalyst on Derivatized Mesoporous Metal Oxide Electrodes journal April 2014
Powering the planet: Chemical challenges in solar energy utilization journal October 2006
Photodriven heterogeneous charge transfer with transition-metal compounds anchored to TiO 2 semiconductor surfaces journal January 2009
Nucleophilic Substitution on (Pentafluorophenyl)dipyrromethane: A New Route to Building Blocks for Functionalized BODIPYs and Tetrapyrroles journal February 2015
Water-stable, hydroxamate anchors for functionalization of TiO2 surfaces with ultrafast interfacial electron transfer journal January 2010
Towards multielectron photocatalysis: a porphyrin array for lateral hole transfer and capture on a metal oxide surface journal January 2015
Stabilizing Small Molecules on Metal Oxide Surfaces Using Atomic Layer Deposition journal September 2013
Stabilization of a Ruthenium(II) Polypyridyl Dye on Nanocrystalline TiO 2 by an Electropolymerized Overlayer journal October 2013
Light-Driven Water Splitting by a Covalently Linked Ruthenium-Based Chromophore–Catalyst Assembly journal December 2016
Heterogenized Iridium Water-Oxidation Catalyst from a Silatrane Precursor journal July 2016
Solvent Dependence of Lateral Charge Transfer in a Porphyrin Monolayer journal December 2016
Surface Modification of SnO 2 Photoelectrodes in Dye-Sensitized Solar Cells: Significant Improvements in Photovoltage via Al 2 O 3 Atomic Layer Deposition journal April 2010
Recent advances in dye-sensitized photoelectrochemical cells for solar hydrogen production based on molecular components journal January 2015
Electro-assembly of a Chromophore-Catalyst Bilayer for Water Oxidation and Photocatalytic Water Splitting journal February 2015
Organic Dye-Sensitized Tandem Photoelectrochemical Cell for Light Driven Total Water Splitting journal July 2015
A visible light water-splitting cell with a photoanode formed by codeposition of a high-potential porphyrin and an iridium water-oxidation catalyst journal January 2011
Outer-Sphere Redox Couples as Shuttles in Dye-Sensitized Solar Cells. Performance Enhancement Based on Photoelectrode Modification via Atomic Layer Deposition journal November 2008
Photodriven Oxidation of Surface-Bound Iridium-Based Molecular Water-Oxidation Catalysts on Perylene-3,4-dicarboximide-Sensitized TiO 2 Electrodes Protected by an Al 2 O 3 Layer journal February 2017
Artificial photosynthesis – functional devices for light driven water splitting with photoactive anodes based on molecular catalysts journal January 2014
Substitution of a hydroxamic acid anchor into the MK-2 dye for enhanced photovoltaic performance and water stability in a DSSC journal January 2014
Photodriven hydrogen evolution by molecular catalysts using Al 2 O 3 -protected perylene-3,4-dicarboximide on NiO electrodes journal January 2017
Heme oxygenation and the widening paradigm of heme degradation journal February 2014
Hydroxamate anchors for water-stable attachment to TiO2 nanoparticles journal January 2009
Hydroxamate Anchors for Improved Photoconversion in Dye-Sensitized Solar Cells journal May 2013
An aqueous, organic dye derivatized SnO 2 /TiO 2 core/shell photoanode journal January 2016
Phosphonate-Based Bipyridine Dyes for Stable Photovoltaic Devices journal November 2001
Modular Assembly of High-Potential Zinc Porphyrin Photosensitizers Attached to TiO 2 with a Series of Anchoring Groups journal July 2013
Heterogeneous photocatalytic reactions on semiconductor materials journal September 1981
Comparison of silatrane, phosphonic acid, and carboxylic acid functional groups for attachment of porphyrin sensitizers to TiO2 in photoelectrochemical cells journal January 2013
Electro-assembly of a Chromophore-Catalyst Bilayer for Water Oxidation and Photocatalytic Water Splitting journal February 2015
Surface-Induced Deprotection of THP-Protected Hydroxamic Acids on Titanium Dioxide journal June 2016
Synthesis, characterization, and water oxidation by a molecular chromophore-catalyst assembly prepared by atomic layer deposition. The “mummy” strategy journal January 2015
Stabilization of Ruthenium(II) Polypyridyl Chromophores on Nanoparticle Metal-Oxide Electrodes in Water by Hydrophobic PMMA Overlayers journal September 2014
Interfacial electron transfer in photoanodes based on phosphorus( v ) porphyrin sensitizers co-deposited on SnO 2 with the Ir(III)Cp* water oxidation precatalyst journal January 2015
Effects of Surface Anchoring Groups (Carboxylate vs Phosphonate) in Ruthenium-Complex-Sensitized TiO 2 on Visible Light Reactivity in Aqueous Suspensions journal September 2004
Dye Stabilization and Enhanced Photoelectrode Wettability in Water-Based Dye-Sensitized Solar Cells through Post-assembly Atomic Layer Deposition of TiO 2 journal July 2013
High-Potential Porphyrins Supported on SnO 2 and TiO 2 Surfaces for Photoelectrochemical Applications journal December 2016
Renewable energy resources: Current status, future prospects and their enabling technology journal November 2014

Similar Records

Reliable bi-functional nickel-phosphate /TiO2 integration enables stable n-GaAs photoanode for water oxidation under alkaline condition
Journal Article · Tue Sep 05 00:00:00 EDT 2023 · Nature Communications · OSTI ID:1402095

Barium Bismuth Niobate Double Perovskite/Tungsten Oxide Nanosheet Photoanode for High‐Performance Photoelectrochemical Water Splitting
Journal Article · Fri Dec 22 00:00:00 EST 2017 · Advanced Energy Materials · OSTI ID:1402095

Dye-sensitized photoelectrochemical water oxidation through a buried junction
Journal Article · Mon Jun 18 00:00:00 EDT 2018 · Proceedings of the National Academy of Sciences of the United States of America · OSTI ID:1402095

Related Subjects