Selective extraction of supported Rh nanoparticles under mild, non-acidic conditions with carbon monoxide

Malek Y.S. Ibrahim, Scott E. Denmark

Research output: Contribution to journalArticle

Abstract

Owing to their limited supplies, recycling of precious metals, especially rhodium, is vital to sustain the growth of certain nanotechnologies. Here we report a mild, efficient, and selective method for rhodium recovery that relies on the use of carbon monoxide to extract rhodium nanoparticles on various supports in polar solvents. Unlike the traditional recycling technologies, this method operates at low temperature and does not require strong acids. Moreover, the CO-induced leaching is complimentary to leaching by acids in terms of selectivity toward rhodium versus other precious metals and results in metal recovery in the form of reduced metallic clusters. The method performs best on freshly reduced surfaces and can be promoted by the addition of tertiary amines. Besides CO gas, formic acid can also be used as a leachant by decomposition to produce CO by Rh catalysis. The concept of CO-induced leaching could be applied to the extraction of rhodium from nuclear waste and extended to modify rhodium nanoparticle size and composition.

Original languageEnglish (US)
Pages (from-to)18075-18083
Number of pages9
JournalJournal of Materials Chemistry A
Volume6
Issue number37
DOIs
StatePublished - Jan 1 2018

Fingerprint

Rhodium
Carbon Monoxide
Carbon monoxide
Nanoparticles
Leaching
formic acid
Precious metals
Recycling
Radioactive Waste
Metal recovery
Acids
Formic acid
Radioactive wastes
Nanotechnology
Catalysis
Amines
Gases
Decomposition
Recovery
Chemical analysis

ASJC Scopus subject areas

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

Cite this

Selective extraction of supported Rh nanoparticles under mild, non-acidic conditions with carbon monoxide. / Ibrahim, Malek Y.S.; Denmark, Scott E.

In: Journal of Materials Chemistry A, Vol. 6, No. 37, 01.01.2018, p. 18075-18083.

Research output: Contribution to journalArticle

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