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Nobler than the Noblest: Noncubic Gold Microcrystallites
Gangaiah Mettela1, Summayya Kouser2,3, Chaitali Sow1
1Thematic Unit of Excellence on Nanochemistry, and Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bangalore, 560 064, India.
Angewandte Chemie (International Ed. in English)
|May 31, 2018
Summary
New unconventional gold microcrystallites with unique crystal lattices show superior stability against mercury and aqua regia. This discovery enhances gold
Area of Science:
- Materials Science
- Chemistry
- Metallurgy
Background:
- Conventional gold (Au) with a cubic lattice is known for stability but susceptible to dissolution by aqua regia and amalgamation with mercury.
- Transition metals like copper can interact with gold surfaces in electrochemical applications.
Purpose of the Study:
- To investigate the stability of gold microcrystallites with unconventional crystal lattices.
- To assess their resistance to mercury, aqua regia, and interaction with copper during electroless plating.
Main Methods:
- Combined experimental and theoretical investigation.
- Synthesis and characterization of gold microcrystallites with unconventional lattices.
- Electrochemical and chemical stability testing.
Main Results:
- Unconventional gold microcrystallites demonstrate enhanced stability against mercury (Hg) and aqua regia.
- These microcrystallites exhibit negligible interaction with copper (Cu) during electroless plating.
- The unconventional gold structures are significantly nobler than conventional gold.
Conclusions:
- Gold microcrystallites with unconventional crystal lattices offer superior chemical and electrochemical stability.
- These findings present opportunities for advanced applications requiring robust gold materials.
- The enhanced nobility opens new avenues in catalysis and protective coatings.
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