market review platinum supply and demand other metals petroleum is used in catalysts for the reforming isomerization of newly mined sector remained unchanged 2003 with a lack construction new capacity recent developments technology have extended lifespan allowed less per catalyst therefore will only increase if capacities are expanded sufficiently to counteract these trends fuel cells electrochemical generators electricity as they exceptionally efficient produce no noxious gases fuelled by hydrogen concept has long been understood it recently however that commercial use explored primary driver behind research desire limit emissions consequence increasingly strict regulatory controls there different types alkaline which provide power on spacecraft direct methanol molten carbonate solid oxide proton exchange membrane pemfc all unique properties lend themselves applications pemfcs containing most versatile can be anything
