The performance of a carbon monoxide laser is improved by coating the walls of the surface facing the discharge with a precious metal chosen from the group consisting of gold, silver, platinum, palladium, rhodium and iridium. The precious metal coating is configured into segments which do not interfere...http://www.google.com/patents/US4897848?utm_source=gb-gplus-sharePatent US4897848 - Discharge driven precious metal catalyst with application to carbon monoxide lasers
