Thought this was pretty interesting as I've not heard of uses for gold like this before. http://www.ornl.gov/ornl/news/features/2014/catalytic-gold-nanoclusters-promise-rich-chemical-yields
Long known that Gold can be used in Cat converters as an alternative to Pt or Pd. You require more gold than Pt. Nothing new here: https://www.gold.org/sites/default/files/images/wgc_catalytic_converter_final_desktop_180214.pdf