Photoelectrochemical reduction of aqueous protons with a CuO|CuBi2O4 heterojunction under visible light irradiation.
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Abstract
A p-type heterojunction photoelectrode consisting of platinized CuBi2O4 layered on a CuO film was prepared. The CuO|CuBi2O4|Pt electrode photo-generates H2 in pH neutral aqueous solution during visible light irradiation and exhibits a substantially enhanced photocurrent compared to CuO|Pt and CuBi2O4|Pt electrodes. Reduced electron-hole recombination by the band offsets in the heterostructure is responsible for the improved photoelectrochemical performance of CuO|CuBi2O4 with a small band-gap of approximately 1.5 eV.
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Keywords
0306 Physical Chemistry (incl. Structural)
Journal Title
Phys Chem Chem Phys
Conference Name
Journal ISSN
1463-9076
1463-9084
1463-9084
Volume Title
Publisher
Royal Society of Chemistry (RSC)
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Sponsorship
Engineering and Physical Sciences Research Council (EP/K039520/1)
Biotechnology and Biological Sciences Research Council (BB/K010220/1)
Engineering and Physical Sciences Research Council (EP/H00338X/2)
Biotechnology and Biological Sciences Research Council (BB/K010220/1)
Engineering and Physical Sciences Research Council (EP/H00338X/2)
The work at Cambridge was supported by the Christian Doppler Research
Association (Austrian Federal Ministry of Economy, Family and Youth
and National Foundation for Research, Technology and Development),
the OMV Group the EPSRC (EP/H00338X/2) and BBSRC
(BB/K010220/1).