A fuel cell system includes a fuel cell having an electrode, and an electrochemical cell having a device. The electrochemical cell includes a cathode, an anode in fluid communication with the electrode of the fuel cell, and an electrolyte in electrical communication with the cathode and the anode. The...http://www.google.com.au/patents/US20020071977?utm_source=gb-gplus-sharePatent US20020071977 - Carbon monoxide filter
