Abstract: Oxygen from water can be efficiently and economically achieved via water electrolysis on antimony, nickel doped tin oxide (Sb,Ni—SnO2/Ti) anode using low DC power. As O2 is evolved, it will be quickly reduced by adjacent cobalt oxide doped carbon nanofilm (Co3O4—CNF/Ti) to hydrogen peroxide (H2O2) and electricity. In the said electricity generation, O2 is first formed in O2 evolution reaction (OER), then, electricity is generated in O2 reduction reaction (ORR). Both of anode and cathode are shared by OER and ORR, yet, the former consumes energy and the latter yields electricity. It is the cathode, a load and the anode that form an electricity-forming circuit. The said circuit relies on clean water to supply the fuel, O2, hence, it is designated as all-water fuel cell (AWFC). Supercapacitor is employed as the load for AWFC, and onboard purifiers are providers of clean water for AWFC.

Abstract: Oxygen from water can be efficiently and economically achieved via water electrolysis on antimony, nickel doped tin oxide (Sb,Ni—SnO2/Ti) anode using low DC power. As O2 is evolved, it will be quickly reduced by adjacent cobalt oxide doped carbon nanofilm (Co3O4—CNF/Ti) to hydrogen peroxide (H2O2) and electricity. In the said electricity generation, O2 is first formed in O2 evolution reaction (OER), then, electricity is generated in O2 reduction reaction (ORR). Both of anode and cathode are shared by OER and ORR, yet, the former consumes energy and the latter yields electricity. It is the cathode, a load and the anode that form an electricity-forming circuit. The said circuit relies on clean water to supply the fuel, O2, hence, it is designated as all-water fuel cell (AWFC). Supercapacitor is employed as the load for AWFC, and onboard purifiers are providers of clean water for AWFC.