Inorganic Hollow Nanocoils Fabricated by Controlled Interfacial Reaction and Their Electrocatalytic Properties

Jun Hwan Moon, Moo Young Lee, Bum Chul Park, Yoo Sang Jeon, Seunghyun Kim, Taesoon Kim, Min Jun Ko, Kang Hee Cho, Ki Tae Nam, Young Keun Kim

Research output: Contribution to journalArticlepeer-review

Abstract

The fabrication of 3D hollow nanostructures not only allows the tactical provision of specific physicochemical properties but also broadens the application scope of such materials in various fields. The synthesis of 3D hollow nanocoils (HNCs), however, is limited by the lack of an appropriate template or synthesis method, thereby restricting the wide-scale application of HNCs. Herein, a strategy for preparing HNCs by harnessing a single sacrificial template to modulate the interfacial reaction at a solid–liquid interface that allows the shape-regulated transition is studied. Furthermore, the triggering of the Kirkendall effect in 3D HNCs is demonstrated. Depending on the final state of the transition metal ions reduced during the electrochemical preparation of HNCs, the surface states of the binding anions and the composition of the HNCs can be tuned. In a single-component CrPO4 HNC with a clean surface, the Kirkendall effect of the coil shape is analyzed at various points throughout the reaction. The rough-surface multicomponent MnOxP0.21 HNCs are complexed with ligand-modified BF4-Mn3O4 nanoparticles. The fabricated nanocomposite exhibits an overpotential decrease of 25 mV at neutral pH compared to pure BF4-Mn3O4 nanoparticles because of the increased active surface area.

Original languageEnglish
Article number2103575
JournalSmall
Volume17
Issue number44
DOIs
Publication statusPublished - 2021 Nov 4

Keywords

  • Kirkendall effect
  • galvanic replacement reaction
  • hollow nanocoils
  • oxygen evolution reaction
  • transition metals

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

Fingerprint

Dive into the research topics of 'Inorganic Hollow Nanocoils Fabricated by Controlled Interfacial Reaction and Their Electrocatalytic Properties'. Together they form a unique fingerprint.

Cite this