Photoelectrochemistry of immobilised Pt@g-C3N4 mediated by hydrogen and enhanced by a polymer of intrinsic microporosity PIM-1

Yuanzhu Zhao, Nawal Abdullah Al Abass, Richard Malpass-evans, Mariolino Carta, Neil B. Mckeown, Elena Madrid, Philip J. Fletcher, Frank Marken

Research output: Contribution to journalArticlepeer-review

Abstract

Graphitic carbon nitride with photo-attached platinum nanoparticles of typically 2.5 nm diameter, Pt@g-C3N4, is known for photo-generation of hydrogen in aqueous environments and in the presence of hole quenchers. Here, the generation of photo-currents from photo-hydrogen production is observed at a platinum electrode, driven by oxalate or glucose hole quenchers, and enhanced with the polymer of intrinsic microporosity PIM-1 coated over the Pt@g-C3N4 deposit. The ability of PIM-1 to create triphasic conditions and to capture hydrogen leads to enhanced photo-current responses even in the presence of ambient oxygen. Effects are discussed in terms of triphasic solid | liquid | hydrogen gas based electrode processes. A glucose concentration dependent (super-Langmuirian) photoresponse is observed. Possible applications are proposed in glucose sensing and in hydrogen-mediated photovoltaics.
Original languageEnglish
Pages (from-to)1-6
JournalElectrochemistry communications
Volume103
Early online date10 Apr 2019
DOIs
Publication statusE-pub ahead of print - 10 Apr 2019

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