am507451c_si_001.pdf (3.91 MB)
Photoactive PDI–Cobalt Complex Immobilized on Reduced Graphene Oxide for Photoelectrochemical Water Splitting
journal contribution
posted on 2015-01-14, 00:00 authored by Janardhan Balapanuru, Gordon Chiu, Chenliang Su, Na Zhou, Zhu Hai, Qing-hua Xu, Kian Ping LohWe report the synthesis of a perylene
derivative (perylene tetracarboxylic di(propyl imidazole), abbreviated
as PDI) that is coordinated with Co(II) ions to form a coordination
polymer [PDI–Co(Cl)2(H2O)2]n (abbreviated as PDI-Co). The PDI-Co
complex combines the photoactivity of the perylene dye with the electrocatalytic
activity of the “Co(II)” center for photoelectrochemical
hydrogen evolution reaction (HER). To improve charge transfer interactions,
the PDI-Co complex is immobilized on reduced graphene oxide (rGO)
via noncovalent interactions to form the rGO–PDI-Co complex.
The composite shows good performance in multiple cycle testing and
the turnover number (TON vs CoII) of this hybrid material
for hydrogen evolution reaction (754 after 5 h) is considerably higher
than previously reported dye-sensitized cobalt-based catalysts.
