Robust and stable ruthenium alloy electrocatalysts for hydrogen evolution by seawater splitting.

Seawater splitting by complicated electrocatalytic processes is promising for hydrogen evolution. Here we present a series of robust electrodes by electrodepositing RuCo and RuCoMo x alloys on Ti foil substrates for hydrogen evolution from seawater splitting. The preliminary results demonstrate that Ti foil supported RuCo and RuCoMo x alloy electrodes require overpotentials of ∼387 and ∼550 mV to drive the hydrogen evolution reaction (HER) at a benchmark current density of 10 mA cm −2 , respectively. Moreover, the resultant Ti foil supported RuCoMo x electrode shows excellent stability under persistent operation at a constant current density of −1.2 V over 12 h. [ABSTRACT FROM AUTHOR]