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Light-Driven Water Splitting by a Covalently Linked Ruthenium-Based Chromophore–Catalyst Assembly

Journal Article · · ACS Energy Letters

The preparation and characterization of new Ru(II) polypyridyl-based chromophore–catalyst assemblies, [(4,4'-PO3H2-bpy)2Ru(4-Mebpy-4'-epic)Ru(bda)(pic)]2+ (1, bpy = 2,2'-bipyridine; 4-Mebpy-4'-epic = 4-(4-methylbipyridin-4'-yl-ethyl)-pyridine; bda = 2,2'-bipyridine-6,6'-dicarboxylate; pic = 4-picoline), and [(bpy)2Ru(4-Mebpy-4'-epic)Ru(bda)(pic)]2+ (1') are described, as is the application of 1 in a dye-sensitized photoelectrosynthesis cell (DSPEC) for solar water splitting. Furthermore, on SnO2/TiO2 core–shell electrodes in a DSPEC configuration with a Pt cathode, the chromophore–catalyst assembly undergoes light-driven water oxidation at pH 5.7 in a 0.1 M acetate buffer, 0.5 M in NaClO4. We observed photocurrents of ~0.85 mA cm–2, with illumination by a 100 mW cm–2 white light source, after 30 s under a 0.1 V vs Ag/AgCl applied bias with a faradaic efficiency for O2 production of 74% measured over a 5 min illumination period.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); 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:
SC0012704; SC0001011
OSTI ID:
1349575
Report Number(s):
BNL--113712-2017-JA; KC0304030
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 1 Vol. 2; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (19)

The Role of Antireflective Coating CYTOP, Immersion Oil, and Sensitizer Selection in Fabricating a 2.3 V, 10% Power Conversion Efficiency SSM‐DSC Device journal February 2019
A Noble-Metal-Free Heterogeneous Photosensitizer-Relay Catalyst Triad That Catalyzes Water Oxidation under Visible Light journal December 2018
A Noble‐Metal‐Free Heterogeneous Photosensitizer‐Relay Catalyst Triad That Catalyzes Water Oxidation under Visible Light journal November 2018
Excited-State Dynamics of [Ru(bpy) 3 ] 2+ Thin Films on Sensitized TiO 2 and ZrO 2 journal February 2019
Directly Photoexcited Oxides for Photoelectrochemical Water Splitting journal September 2019
Electronic structure and optical properties of isolated and TiO 2 ‐grafted free base porphyrins for water oxidation: A challenging test case for DFT and TD‐DFT journal July 2019
O–O bond formation in ruthenium-catalyzed water oxidation: single-site nucleophilic attack vs. O–O radical coupling journal January 2017
Noncovalent immobilization and surface characterization of lanthanide complexes on carbon electrodes journal January 2017
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
Dye sensitized photoelectrolysis cells journal January 2019
Visible light-driven water oxidation with a ruthenium sensitizer and a cobalt-based catalyst connected with a polymeric platform journal January 2019
Early photophysical events of a ruthenium( ii ) molecular dyad capable of performing photochemical water oxidation and of its model compounds journal January 2019
Cooperative silanetriolate-carboxylate sensitiser anchoring for outstanding stability and improved performance of dye-sensitised photoelectrodes journal January 2018
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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