Electro-Co-Polymerisation of Polypyrrole-Polyaniline Composites in Ionic Liquids for Metal-Free Hydrogen Evolution Electrodes

Chhavi Sharma, Yuvraj Singh Negi, Kaushik Parida, Sara Dale

Research output: Contribution to journalArticlepeer-review

Abstract

Pure organic films consisting of polypyrrole, polyaniline and a composite of polypyrrole and polyaniline electrodeposited in the ionic liquid EMIM-TFSI onto mesoporous carbon electrodes are tested for their hydrogen evolution reaction capabilities. The use of these intrinsically conducting polymers is seen as a way of stepping away from expensive and rare metallic catalysts. Co-polymerisation of polypyrrole and polyaniline in a 1 : 10 ratio in EMIM-TFSI was found to be doped with the TFSI anion and be much more active to the hydrogen evolution reaction when compared to pure polymers. Tafel analysis of the composite gave a value of 144 mV/dec indicating that the Volmer step is the rate limiting step. However, stability tests showed an improvement in the composite's overpoential performance for the hydrogen evolution reaction.

Original languageEnglish
Article numbere202400215
JournalChemistryOpen
Volume13
Issue number12
Early online date24 Sept 2024
DOIs
Publication statusPublished - 31 Dec 2024

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

Funding

CS is thankful to the Commonwealth Scholarship Commission, London (CSC split\u2010site PhD fellowship) (Grant: INCN\u201022\u2010437), Ministry of Human Resource and Development (MHRD), India, for financial support to carry out this study. SD thanks the Royal Society (Grant: UF160272). SD and CS thank the university of Bath, UK. CS, YSN and KP thank the Indian Institute of Technology (IIT), Roorkee. CS: Experimental, original draft writing and conceptualisation; SD: supervision, corrections, and procurement; YSN and KP: Suggestions and draft corrections.

FundersFunder number
Ministry of Education, India
Commonwealth Scholarship CommissionINCN‐22‐437
Commonwealth Scholarship Commission
Royal SocietyUF160272
Royal Society

    Keywords

    • Copolymerization
    • Electrodeposition
    • Hydrogen evolution
    • Ionic Liquids
    • Polymers

    ASJC Scopus subject areas

    • General Chemistry

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