Photothermal Coupling Electrolysis on Ni-W-B Toward Practical Overall Water Splitting

An overall water splitting device assembled by photothermal effect coupled Ni-W-B/carbon cloth electrode could deliver a current density of 25 mA cm−2 at an ultralow cell voltage of 1.524 V without global heating of the whole system, which is comparable to its performance at elevated cell temperature of 50°C.