Cyanogel coordination polymers as precursors to transition metal alloys and intermetallics - From traditional heating to microwave processing

Martina Vondrova, Christine M. Burgess, Andrew Bruce Bocarsly

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23 Scopus citations

Abstract

Cyanogel coordination polymers are amorphous Prussian blue analogues formed in a hydrogel state by the reaction of a chlorometalate with a cyanometalate in aqueous solution. At elevated temperatures, cyanogels thermally autoreduce to form transition-metal alloys. This work demonstrates the general nature of this type of sol-gel processing chemistry to prepare binary and ternary transition-metal alloys (Pd/Co, Pt/Co, Ru/Co, Ir/CO, Pd/Ni, Pt/Ni, Pt/Ru, Pd/Fe, Pd/Fe/Co) and intermetallics (Pt3Fe, Pt3Co, PtCo). Tuning of the composition of the gels and alloys by a variety of methods is demonstrated. The thermal autoreduction can be induced either by convective heating or by microwave irradiation, as microwave dielectric heating of cyanogels leads to a sufficient temperature increase in the sample to cause the reduction of the metal centers.

Original languageEnglish (US)
Pages (from-to)2203-2212
Number of pages10
JournalChemistry of Materials
Volume19
Issue number9
DOIs
StatePublished - May 1 2007

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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