Check out this recent Science paper on ‘A Synthetic Nickel Electrocatalyst with a Turnover Frequency Above 100,000 s−1 for H2 Production’.
Morris Bullock, Daniel Du Bois and colleagues from the Pacific Northwest National Laboratory in the USA make a nickel catalyst which produces hydrogen at 10 times the rate of the enzyme hydrogenase, and much faster than commercially available catalysts.
Read the Chemistry World article here to find out more.