Journal Article

FZJ-2017-07929

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Oriented Films of Conjugated 2D Covalent Organic Frameworks as Photocathodes for Water Splitting

Sick, T. (Corresponding author) ; Hufnagel, A. G. ; Kampmann, J. ; Kondofersky, I. ; Calik, M. ; Rotter, J. M. ; Evans, A. ; Döblinger, M. ; Herbert, S. ; Peters, K. ; Böhm, D. ; Knochel, P. ; Medina, D. D. ; Fattakhova-Rohlfing, D.FZJ* ; Bein, T.

2017
American Chemical Society Washington, DC

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Please use a persistent id in citations: doi:10.1021/jacs.7b06081

Abstract: Light-driven water electrolysis at a semiconductor surface is a promising way to generate hydrogen from sustainable energy sources, but its efficiency is limited by the performance of available photoabsorbers. Here we report the first time investigation of covalent organic frameworks (COFs) as a new class of photoelectrodes. The presented 2D-COF structure is assembled from aromatic amine-functionalized tetraphenylethylene and thiophene dialdehyde building blocks to form conjugated polyimine sheets, which π-stack in the third dimension to create photoactive porous frameworks. Highly oriented COF films absorb light in the visible range to generate photo-excited electrons that diffuse to the surface and are transferred to the electrolyte resulting in proton reduction and hydrogen evolution. The observed photoelectrochemical activity of the 2D-COF films and their photocorrosion stability in water pave the way for a novel class of photoabsorber materials with versatile optical and electronic properties that are tunable through the selection of appropriate building blocks and their three-dimensional stacking.

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Contributing Institute(s):

1. Werkstoffsynthese und Herstellungsverfahren (IEK-1)

Research Program(s):

1. 131 - Electrochemical Storage (POF3-131) (POF3-131)

Appears in the scientific report 2017

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Database coverage:
; BIOSIS Previews ; Current Contents - Life Sciences ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF >= 10 ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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