A highly durable graphene monolayer electrode under long-term hydrogen evolution cycling.

Achieving long term stability of single graphene sheets towards repeated electrochemical hydrogen evolution reaction (HER) cycling has been challenging. Here, we show through appropriate electrode preparation that it is possible to obtain highly durable isolated graphene electrodes, which can survive several hundreds of HER cycles with virtually no damage to the sp 2 -carbon framework and persistently good electron transfer characteristics.