Comprehensive study to design advanced metal-carbide@garaphene and metal-carbide@iron oxide nanoparticles with tunable structure by the laser ablation in liquid

Fatemeh Davodi, Elisabeth Mühlhausen, Daniel Settipani, Eeva Leena Rautama, Ari Pekka Honkanen, Simo Huotari, Galina Marzun, Pekka Taskinen, Tanja Kallio*

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

4 Sitaatiot (Scopus)

Abstrakti

Core-shell nanoparticles represent a class of materials that exhibit a variety of properties. By rationally tuning the cores and the shells in such nanoparticles (NPs), a range of materials with tailorable properties can be produced which are of interest for a wide variety of applications. Herein, experimental and theoretical approaches have been combined to show the structural transformation of NPs resulting to the formation of either NiFexCy encapsulated in ultra-thin graphene layer (NiFe@UTG) or Ni3C/FexCy@FeOx NPs with the universal one-step pulse laser ablation in liquid (PLAL) method. Analysis suggests that carbon in Ni3C is the source for the carbon shell formation, whereas the final carbon-shell thickness in the NPs originates from the difference between Ni3C and FexCy phases stability at room temperature. The ternary Ni-Fe-C phase diagram calculations reveal the competition between carbon solubility in the studied metals (Ni and Fe) and their tendency toward oxidation as the key properties to produce controlled core-shell NP materials. As an application example, the electrocatalytic hydrogen evolution current on the different NPs is measured. The electrochemical analysis of the NPs reveals that NiFe@UTG has the best performance amongst the NPs in this study in both alkaline and acidic media.

AlkuperäiskieliEnglanti
Sivut180-192
Sivumäärä13
JulkaisuJournal of Colloid and Interface Science
Vuosikerta556
DOI - pysyväislinkit
TilaJulkaistu - 15 marraskuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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  • Projektit

    • 2 Päättynyt

    CloseLoop: Korkean jalostusarvon materiaalit suljetussa raaka-ainekierrossa

    Kauranen, P., Blomberg, T., Heiska, J., Karppinen, M. & Kousar, S.

    01/04/201615/01/2020

    Projekti: Academy of Finland: Strategic research funding

    Laitteet

    OtaNano

    Anna Rissanen (Manager)

    Aalto-yliopisto

    Laitteistot/tilat: Facility

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