Highly-reactive AgPt nanofern composed of {001}-faceted nanopyramidal spikes for enhanced heterogeneous photocatalysis application

Ali Umar Akrajas, Elvy Rahmi, Aamna Balouch, Mohd Yusri Abd Rahman, Muhamad Mat Salleh, Munetaka Oyama

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The structure and property of the catalyst surface determine the physico-chemical process and the reactivity at the surface, such as catalysis behavior, adsorption, surface segregation and charge transfer, etc. A catalyst with a surface containing high-energy facets, high defect or high-energy sites, such as twinning, vertexes, spikes, etc., may facilitate enhanced catalytic and surface reactivity. Here, we present a straightforward approach to synthesize novel nanopyramidal spike composed nanoferns of AgPt bimetals vertically-oriented on the substrate surface for potential application in catalysis. High-resolution transmission electron microscopy analysis reveals that the nanopyramidal spike is characterized by {001} faces, the high-energy facet of the fcc metal system, promising enhanced catalytic reaction. The crystal growth analysis result determines that the lattice-mismatching effect between Ag and Pt is the key factor for the formation of the nanopyramidal AgPt structure and the nanofern suprastructure is produced via oriented-attachment of the nanopyramidals. The heterogeneous catalytic properties characterisation of AgPt nanofern in the photodegradation of methyl orange in the absence of any reducing agent revealed that the catalytic efficiency is determined by the Ag concentration in the nanocrystals and the morphology of the nanofern structure. This journal is

Original languageEnglish
Pages (from-to)17655-17665
Number of pages11
JournalJournal of Materials Chemistry A
Volume2
Issue number41
DOIs
Publication statusPublished - 7 Nov 2014

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Photocatalysis
Catalysis
Bimetals
Surface segregation
Catalysts
Twinning
Reducing Agents
Photodegradation
Reducing agents
Surface charge
High resolution transmission electron microscopy
Crystallization
Crystal growth
Crystal lattices
Nanocrystals
Charge transfer
Metals
Adsorption
Defects
Substrates

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Highly-reactive AgPt nanofern composed of {001}-faceted nanopyramidal spikes for enhanced heterogeneous photocatalysis application. / Akrajas, Ali Umar; Rahmi, Elvy; Balouch, Aamna; Abd Rahman, Mohd Yusri; Mat Salleh, Muhamad; Oyama, Munetaka.

In: Journal of Materials Chemistry A, Vol. 2, No. 41, 07.11.2014, p. 17655-17665.

Research output: Contribution to journalArticle

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