Mechanistic studies of the photo-electrochemical hydrogen evolution reaction on poly(2,2′-bithiophene)

Chun Hin Ng, C. André Ohlin, Siyao Qiu, Chenghua Sun, Bjorn Winther Jensen

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The realisation of poly(2,2′-bithiophene) (PBTh) as an effective photo-electrocatalyst for the hydrogen evolution reaction is a novel discovery [Ng et al., Int. J. Hydrogen Energy, 2014, 39, 18230]; however, the underlying mechanism of this catalysis remains unknown. In this article, studies using electrochemical, photo-electrochemical, Raman spectroscopy and computational modelling are undertaken to shed some light on the mechanistic process. From these studies, a compelling reaction scheme is proposed involving the protonation of the PBTh chain via the sulphur atom and subsequent intersystem crossing to a long-lived triplet state for the reaction to form H2. This suggested mechanism is tentative but cohesively integrates all experimental and computational findings. Importantly, these insights into the PBTh system form an important mechanistic milestone study and will help inspire new developments and applications for polythiophenes and conducting polymers.

Original languageEnglish
Pages (from-to)3253-3262
Number of pages10
JournalCatalysis Science and Technology
Volume6
Issue number9
DOIs
Publication statusPublished - 2016
Externally publishedYes

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Hydrogen
Electrocatalysts
Protonation
Conducting polymers
Sulfur
Catalysis
Raman spectroscopy
Atoms
Polymers
polythiophene

ASJC Scopus subject areas

  • Catalysis

Cite this

Mechanistic studies of the photo-electrochemical hydrogen evolution reaction on poly(2,2′-bithiophene). / Ng, Chun Hin; Ohlin, C. André; Qiu, Siyao; Sun, Chenghua; Winther Jensen, Bjorn.

In: Catalysis Science and Technology, Vol. 6, No. 9, 2016, p. 3253-3262.

Research output: Contribution to journalArticle

Ng, Chun Hin ; Ohlin, C. André ; Qiu, Siyao ; Sun, Chenghua ; Winther Jensen, Bjorn. / Mechanistic studies of the photo-electrochemical hydrogen evolution reaction on poly(2,2′-bithiophene). In: Catalysis Science and Technology. 2016 ; Vol. 6, No. 9. pp. 3253-3262.
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