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*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)180-192
Number of pages13
JournalJournal of Colloid and Interface Science
Volume556
DOIs
Publication statusPublished - 15 Nov 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • Carbon-shell formation
  • Core-shell nanoparticles
  • Hydrogen evolution reaction
  • Metal-carbide
  • Nickel-iron-carbon ternary phase diagram
  • Pulse laser ablation in liquid

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    CloseLoop: Closing the Loop for High-added-value Materials

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

    01/04/201615/01/2020

    Project: Academy of Finland: Strategic research funding

    Sustainable platinum group metal free catalyst materials

    Sorsa, O., Kallio, T., Rauhala, T. & Davodi, F.

    01/09/201523/09/2019

    Project: Academy of Finland: Other research funding

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    Aalto University

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