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La5 Ti2 Cu0.9 Ag0.1 S5 O7 Modified with a Molecular Ni Catalyst for Photoelectrochemical H2 Generation.

Published version
Peer-reviewed

Type

Article

Change log

Authors

Rosser, Timothy E 
Sun, Song 
Antón-García, Daniel 

Abstract

The stable and efficient integration of molecular catalysts into p-type semiconductor materials is a contemporary challenge in photoelectrochemical fuel synthesis. Here, we report the combination of a phosphonated molecular Ni catalyst with a TiO2 -coated La5 Ti2 Cu0.9 Ag0.1 S5 O7 photocathode for visible light driven H2 production. This hybrid assembly provides a positive onset potential, large photocurrents, and high Faradaic yield for more than three hours. A decisive feature of the hybrid electrode is the TiO2 interlayer, which stabilizes the oxysulfide semiconductor and allows for robust attachment of the phosphonated molecular catalyst. This demonstration of an oxysulfide-molecular catalyst photocathode provides a novel platform for integrating molecular catalysts into photocathodes and the large photovoltage of the presented system makes it ideal for pairing with photoanodes.

Description

Keywords

hydrogen, molecular electrochemistry, semiconductors, solar fuels, surface chemistry

Journal Title

Chemistry

Conference Name

Journal ISSN

0947-6539
1521-3765

Volume Title

24

Publisher

Wiley
Sponsorship
Christian Doppler Forschungsgesellschaft (unknown)
EPSRC (1800449)
Japan Society for the Promotion of Science (JSPS); Christian Doppler Research Association (Austrian Federal Ministry of Science, Research and Economy and the National Foundation for Research, Technology and Development); OMV group; EPSRC, Grants-in-Aids for Scientific Research and for Young Scientists from JSPS