Aqueous Photoelectrochemical Reduction of Anthraquinone Disulfonate at Organic Polymer Films

Chowdhury, Pankaj; Fortin, Patrick; Holdcroft, Steven

doi:10.1002/macp.201500440

Cited by 17 publications

(14 citation statements)

References 48 publications

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“…Likewise conductive polymers can be used as ion pumps to control spatial and temporal ion movement, with applications to drug delivery 5 , 6 . A number of other electrochemical energy-conversion and storage devices have been realized using conductive polymers, including organic electronic ratchets 7 – 9 , redox-flow batteries 10 , 11 , supercapacitors 12 , 13 , electrochromics 14 , 15 , and (photo-)electrochemical cells for catalysis and water purification 16 , 17 .…”

Section: Introductionmentioning

confidence: 99%

Normal and inverted regimes of charge transfer controlled by density of states at polymer electrodes

Rudolph

Ratcliff

2017

Nat Commun

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Conductive polymer electrodes have exceptional promise for next-generation bioelectronics and energy conversion devices due to inherent mechanical flexibility, printability, biocompatibility, and low cost. Conductive polymers uniquely exhibit hybrid electronic–ionic transport properties that enable novel electrochemical device architectures, an advantage over inorganic counterparts. Yet critical structure–property relationships to control the potential-dependent rates of charge transfer at polymer/electrolyte interfaces remain poorly understood. Herein, we evaluate the kinetics of charge transfer between electrodeposited poly-(3-hexylthiophene) films and a model redox-active molecule, ferrocenedimethanol. We show that the kinetics directly follow the potential-dependent occupancy of electronic states in the polymer. The rate increases then decreases with potential (both normal and inverted kinetic regimes), a phenomenon distinct from inorganic semiconductors. This insight can be invoked to design polymer electrodes with kinetic selectivity toward redox active species and help guide synthetic approaches for the design of alternative device architectures and approaches.

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Section: Introductionmentioning

confidence: 99%

Normal and inverted regimes of charge transfer controlled by density of states at polymer electrodes

Rudolph

Ratcliff

2017

Nat Commun

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“…There are, however, photoelectrochemical reactions which have been shown to occur directly at the polymer/electrolyte interface in the absence of an electrocatalyst, such as the reduction of O 2 48 and organic redox couples, such as anthraquinone-2,7-disulfonate (AQDS). 49 The reduction of…”

Section: Discussionmentioning

confidence: 99%

Hydrogen Evolution at Conjugated Polymer Nanoparticle Electrodes

Fortin¹,

Holdcroft²

2018

Meet. Abstr.

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Currently, there is a global effort being made to reduce greenhouse gas emissions through the implementation of renewable energies. An attractive alternative to fossil fuels is hydrogen, as it can be stored, transported and used as on demand as a liquid fuel while producing only water vapor as a by-product. The production of hydrogen can be attained through the photoelectrochemical splitting of water into hydrogen and oxygen, representing a sustainable, carbon neutral method of hydrogen generation. Our research focuses on the use of conjugated polymers, namely poly(3-hexylthiophene) (P3HT), as photocathode materials to convert solar energy into hydrogen. Using phenyl-C61-butryic acid methyl ester (PCBM) as an electron acceptor to effectively separate the photogenerated electron-hole pair within the semiconducting polymer, we can take advantage of these separated charges to perform electrochemical reactions at the polymer/electrolyte interface. This work investigates the preparation of nanostructured organic thin films from P3HT:PCBM nanoparticles and their characterization as photoelectrodes for photoelectrochemical hydrogen evolution. The morphology and optoelectronic properties of the nanostructured photocathodes are compared with conventional, solution-cast thin films of P3HT:PCBM. The nanostructured photoelectrodes provide increased surface area compared with solution-cast films, as well as greater control of the nanoscale morphology within each nanoparticle, leading to enhanced P3HT:PCBM phase segregation. The photo-assisted deposition of platinum nanoparticles as hydrogen evolution reaction (HER) catalysts onto the nanostructured P3HT:PCBM photocathodes facilitates the photoreduction of protons to H2.

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“…Various organic molecules can be oxidized, such as sugars, or reduced, such as quinone molecules. 94 Dioxygen, dissolved in water, is a potent electron acceptor. Moreover, water electrolysis is always a possibility, resulting in hydrogen or oxygen gas evolution.…”

Section: Photonic Approachesmentioning

confidence: 99%

In Vivo Organic Bioelectronics for Neuromodulation

et al. 2022

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The nervous system poses a grand challenge for integration with modern electronics and the subsequent advances in neurobiology, neuroprosthetics, and therapy which would become possible upon such integration. Due to its extreme complexity, multifaceted signaling pathways, and ∼1 kHz operating frequency, modern complementary metal oxide semiconductor (CMOS) based electronics appear to be the only technology platform at hand for such integration. However, conventional CMOS-based electronics rely exclusively on electronic signaling and therefore require an additional technology platform to translate electronic signals into the language of neurobiology. Organic electronics are just such a technology platform, capable of converting electronic addressing into a variety of signals matching the endogenous signaling of the nervous system while simultaneously possessing favorable material similarities with nervous tissue. In this review, we introduce a variety of organic material platforms and signaling modalities specifically designed for this role as “translator”, focusing especially on recent implementation in in vivo neuromodulation. We hope that this review serves both as an informational resource and as an encouragement and challenge to the field.

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Aqueous Photoelectrochemical Reduction of Anthraquinone Disulfonate at Organic Polymer Films

Cited by 17 publications

References 48 publications

Normal and inverted regimes of charge transfer controlled by density of states at polymer electrodes

Normal and inverted regimes of charge transfer controlled by density of states at polymer electrodes

Hydrogen Evolution at Conjugated Polymer Nanoparticle Electrodes

In Vivo Organic Bioelectronics for Neuromodulation

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