The group of Seiji OGO at Kyushu University has immobilized a [NiFe]Hydrogenase from Citrobacter sp. S-77 on carbon fibers and found that the enzyme has a mass activity that is over 600 times greater than that of platinum, is stable to air, and can be recovered after CO poisoning.
China Bio news release, June 6, 2014
Kyushu team describe powerful hydrogenase-based fuel cell