Fig. 6: Solar-powered reactor design and performance.
From: Highly selective urea electrooxidation coupled with efficient hydrogen evolution
a J–V curve of the solar panel and the UOR polarization curves with the Ti foam containing atomically isolated asymmetric Ni–O–Ti sites as the anode and Pt foil as the cathode with a scan rate of 5 mV s–1. b LSV curves with 85% iR correction of the asymmetric Ni–O–Ti sites in 1.0 M KOH + 0.33 M urea and 1.0 M KOH for driving the UOR and OER, respectively. The on-line MS of H2 and N2/O2 collected from cathode and anode chambers, respectively, (c) in 1.0 M KOH + actual urine (urea: ~ 7 g L–1). d The digital image of the solar-powered reactor. e The collected H2 and N2 from actual urine. f Concentrations of N-total, NO3−, NO2− and NH3 during photo-electrochemical urine oxidation process.
