Details

Autor(en) / Beteiligte

• Sherman, Benjamin D
• Xie, Yan
• Sheridan, Matthew V
• Wang, Degao
• Shaffer, David W
• Meyer, Thomas J
• Concepcion, Javier J

Titel

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

Ist Teil von

• ACS energy letters, 2017-01, Vol.2 (1), p.124-128

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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. 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. With illumination by a 100 mW cm–2 white light source, photocurrents of ∼0.85 mA cm–2 were observed 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.