Electroplated Ni-Fe Layer on Stainless Steel Fiber Felt as an Efficient Electrode for Oxygen Evolution Reaction

The development of inexpensive and superior electrodes for oxygen evolution reaction (OER) is critical for producing hydrogen by water electrolysis. In this paper, we compare stainless steel fiber felt (SSF), nickel foam (NF) and knitted nickel mesh (NM) as substrates of oxygen evolution reaction (OER) electrodes and use the method of galvanostatic electroplating to prepare a Ni-Fe layer on different substrates. The obtained Ni Fe @SSF electrode with the uniform alloy layer on the surface not only exhibits excellent OER activity (over potential of 250 mV at 10 mA·cm-2), but also possesses good stability in 1 M KOH. The Ni Fe @SSF electrode shows potential as an efficient OER electrode in alkaline water electrolysis.