Journal
CATALYSTS
Volume 10, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/catal10060717
Keywords
multi-leg TiO(2)nanotube; platinized cyanographene; photoanode; photoelectrochemical properties; charge transfer
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Funding
- Operational Programme Research, Development and Education-European Regional Development Fund [CZ.02.1.01/0.0/0.0/15_003/0000416]
- Ministry of Education, Youth and Sports of the Czech Republic
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Highly ordered multi-leg TiO(2)nanotubes (MLTNTs) functionalized with platinized cyanographene are proposed as a hybrid photoelectrode for enhanced photoelectrochemical water splitting. The platinized cyanographene and cyanographene/MLTNTs composite yielded photocurrent densities 1.66 and 1.25 times higher than those of the pristine MLTNTs nanotubes, respectively. Open circuit V(OC)decay (V-OCD), electrochemical impedance spectroscopy (EIS), and intensity-modulated photocurrent spectroscopy (IMPS) analyses were performed to study the recombination rate, charge transfer characteristics, and transfer time of photogenerated electrons, respectively. According to the V(OCD)and IMPS results, the addition of (platinized) cynographene decreased the recombination rate and the transfer time of photogenerated electrons by one order of magnitude. Furthermore, EIS results showed that the (platinized) cyanographene MLTNTs composite has the lowest charge transfer resistance and therefore the highest photoelectrochemical performance.
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