Tailoring the Electrocatalytic and Supercapacitor Performance Through Materials Design and Nano-engineering

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Journal Title

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Volume Title

School of Chemical Technology | Doctoral thesis (article-based) | Defence date: 2024-10-24

Authors

Date

2024

Department

Kemian ja materiaalitieteen laitos
Department of Chemistry and Materials Science

Major/Subject

Mcode

Degree programme

Language

en

Pages

134

Series

Aalto University publication series DOCTORAL THESES, 223/2024

Abstract

The development of efficient energy conversion and storage systems using electrochemical solutions heavily depends on selecting the right electrode material. This involves meticulously designing and tailoring the material's functionality to achieve the necessary surface and intrinsic interfacial characteristics. The aim of this thesis is to provide insights into electroactive material design criteria and offer a range of catalyst preparation methods to achieve this goal. The study has also delved into several fundamental catalysis and material synthesis aspects. In this context, we have demonstrated the versatile use of Lewis base-containing porous organic polymers as a dual-function support and stabilizer for a Pt single atomic/ionic active sites-based hydrogen evolution electrocatalyst, resulting in superior catalyst mass activity and utilization. Additionally, a highly efficient synergistic graphene-supported Ni(OH)2/Zr(OH)4 nano clusters-based oxygen evolution electrocatalyst was developed through the use of a sacrificial metal-organic framework as a pre-catalyst to regulate the release of active catalyst precursors. The thesis also explored the ability of Ag/PCA organic-inorganic hybrid catalyst material to control the oxygen reduction reaction pathway with enhanced selectivity towards peroxide formation, where such hybrid material was obtained through a novel bio-nanosynthesis route. The significant role of particle dispersity and proximity effects in evaluating CuO nanostructure-based electrocatalysts with pristine surfaces, obtained through the superior Leidenfrost nano synthesis technique, was also addressed. The studies in this work also investigated the overlooked role of the conjugate anions in controlling the nanocellulose-derived carbon aerogel microstructures and their impact on performance in EDLC electrodes. Furthermore, the study revisited the important role of surface wettability and the correlation between electrolyte selection and aerogel microstructure and surface characteristics in defining the EDLC active material performance.

Description

Supervising professor

Elbahri, Mady, Prof., Aalto University, Department of Chemistry and Materials Science, Finland

Thesis advisor

Deska, Jan, Prof., Department of Chemistry, University of Helsinki, Finland

Keywords

electrocatalyst, EDLC, microporous solids, single atom catalyst, hydrogen evolution, oxygen evolution, oxygen reduction, leidenfrost synthesis, hydrothermal synthesis, bio-nanosynthesis, porous organic polymers, pre-catalyst, metal-organic framework, electrochemical activation.

Other note

Parts

  • [Publication 1]: Soliman, A.B., Hassan, M.H., Huan, T.N., Abugable, A.A., Elmehalmey, W.A., Karakalos, S.G., Tsotsalas, M., Heinle, M., Elbahri, M., Fontecave, M. and Alkordi, M.H., 2017. Pt Immobilization within a Tailored Porous-Organic Polymer–Graphene Composite: Opportunities in the Hydrogen Evolving Reaction. ACS Catalysis, 7(11), pp.7847-7854.
    DOI: 10.1021/acscatal.7b02246 View at publisher
  • [Publication 2]: Hassan, M.H., Soliman, A.B., Elmehelmey W.A., Abu gable, A.A., Karakalos, S.G., Elbahri, M., Hassanien, A. and Alkordi, M.H., 2019. A Niloaded, metal–organic framework–graphene composite as a precursor for in situ electrochemical deposition of a highly active and durable water oxidation nanocatalyst. Chemical communications, 55(1), pp.31-34.
    DOI: 10.1039/c8cc07120a View at publisher
  • [Publication 3]: Al Haj, Y., Soliman, A.B., Vapaavuori, J. and Elbahri, M., 2024. Carbon Aerogels Derived from Anion‐Modified Nanocellulose for Adaptive Supercapacitor Performance. Advanced Functional Materials, p.2313117.
    Full text in Acris/Aaltodoc: https://urn.fi/URN:NBN:fi:aalto-202408286036
    DOI: 10.1002/adfm.202313117 View at publisher
  • [Publication 4]: Soliman, A.B., Disci, D., Tillack, C., Schütt F., Seitsonen, J., Shehadi, I., Carroll-Pöhls, J., Assad, M., Abdelaziz, R., Rautama, E., Homaeigohar, S., and Elbahri, M., 2024. Cocoon Microvesicles Trigger Topochemical Design of Levitated Adherence Metallic Film, Adaptive Electrochemical and Photophobic color conductivity, Submitted
  • [Publication 5]: Soliman, A.B., Abdelaziz, R., Zarie, E., Al-Hunaiti A, Homaeigohar, S., and Elbahri, M., 2024. Exploring Size Uniformity of a Catalyst via Spatiotemporal Growth in Water: Leidenfrost Droplet versus Hydrothermal Treatment, Submitted

Citation

Permanent link to this item

https://urn.fi/URN:ISBN:978-952-64-2085-1

Collections

[diss] Kemian tekniikan korkeakoulu / CHEM