NDLI: Visible light-driven water oxidation using a covalently-linked molecular catalyst–sensitizer dyad assembled on a TiO<sub>2</sub> electrode

Content Provider	Royal Society of Chemistry (RSC)
Author	Fukushima, Takashi Imahori, Hiroshi Yamamoto, Masanori Sun, Licheng Li, Fusheng Wang, Lei Tanaka, Koji
Copyright Year	2016
Abstract	The combination of porphyrin as a sensitizer and a ruthenium complex as a water oxidation catalyst (WOC) is promising to exploit highly efficient molecular artificial photosynthetic systems. A covalently-linked ruthenium-based WOC–zinc porphyrin (ZnP) sensitizer dyad was assembled on a TiO2 electrode for visible-light driven water oxidation. The water oxidation activity was found to be improved in comparison to the reference systems with the simple combination of the individual WOC and ZnP as well as with ZnP solely, demonstrating the advantage of the covalent linking approach over the non-covalent one. More importantly, via vectorial multi-step electron transfer triggered by visible light, the dye-sensitized photoelectrochemical cell (DSPEC) achieved a broader PEC response in the visible region than DSPECs with conventional ruthenium-based sensitizers. Initial incident photon-to-current efficiencies of 18% at 424 nm and 6.4% at 564 nm were attained under monochromatic illumination and an external bias of −0.2 V vs. NHE. Fast electron transfer from the WOC to the photogenerated radical cation of the sensitizer through the covalent linkage may suppress undesirable charge recombination, realizing the moderate performance of water oxidation. X-ray photoelectron spectroscopic analysis of the photoanodes before and after the DSPEC operation suggested that most of the ruthenium species exist at higher oxidation states, implying that the insufficient oxidation potential of the ZnP moiety for further oxidizing the intermediate ruthenium species at the photoanode is at least the bottleneck of the system.
Starting Page	1430
Ending Page	1439
Page Count	10
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	7
Issue Number	2
Journal	Chemical Science
DOI	10.1039/c5sc03669k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Dye-sensitized solar cell Ruthenium Electrode Carrier generation and recombination Ion WOC PEC X-ray crystallography Photoelectric effect Porphyrin Covalent bond Photoelectrochemical cell DSPEC Photosynthesis
Content Type	Text
Resource Type	Article
Subject	Chemistry

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Dye-Sensitized Photoelectrosynthesis Cell (DSPEC) for Benzyl Alcohol Oxidation using Zinc Porphyrin Sensitizer and TEMPO Catalyst

TiO2-Nafion Photoelectrode Hybridized with Carbon Nanotubes for Sensitized Photochemical Activity

Solid-state dye-sensitized TiO₂ solar cells based on a sensitizer covalently wired to a hole conducting polymer

Enhancement of Dye-Sensitized Solar Cells by using Graphene- TiO2 Composites as Photoelectrochemical Working Electrode

Highly efficient porphyrin sensitizers for dye-sensitized solar cells (2007).

A Z-scheme type photoelectrochemical cell consisting of porphyrin-containing polymer and dye-sensitized TiO₂ electrodes

Parameters affecting the chemical work output of a hybrid photoelectrochemical biofuel cell

Oxide nanowires for solar cell applications

Pan Dye as an Organic Sensitizer of

Visible light-driven water oxidation using a covalently-linked molecular catalyst–sensitizer dyad assembled on a TiO₂ electrode

Similar Documents

Dye-Sensitized Photoelectrosynthesis Cell (DSPEC) for Benzyl Alcohol Oxidation using Zinc Porphyrin Sensitizer and TEMPO Catalyst

TiO2-Nafion Photoelectrode Hybridized with Carbon Nanotubes for Sensitized Photochemical Activity

Solid-state dye-sensitized TiO2 solar cells based on a sensitizer covalently wired to a hole conducting polymer

Enhancement of Dye-Sensitized Solar Cells by using Graphene- TiO2 Composites as Photoelectrochemical Working Electrode

Highly efficient porphyrin sensitizers for dye-sensitized solar cells (2007).

A Z-scheme type photoelectrochemical cell consisting of porphyrin-containing polymer and dye-sensitized TiO2 electrodes

Parameters affecting the chemical work output of a hybrid photoelectrochemical biofuel cell

Oxide nanowires for solar cell applications

Pan Dye as an Organic Sensitizer of

Visible light-driven water oxidation using a covalently-linked molecular catalyst–sensitizer dyad assembled on a TiO2 electrode

Solid-state dye-sensitized TiO₂ solar cells based on a sensitizer covalently wired to a hole conducting polymer

A Z-scheme type photoelectrochemical cell consisting of porphyrin-containing polymer and dye-sensitized TiO₂ electrodes

Visible light-driven water oxidation using a covalently-linked molecular catalyst–sensitizer dyad assembled on a TiO₂ electrode