A Transparent and\nFlexible Electrode with Water-Oxidation\nActivity

Large-scale solar-driven water splitting necessitates\nthe advancement\nof practical and robust water-oxidation reaction (WOR) catalysts.\nThe deposited NiFe (hydr)oxide on an indium tin oxide-coated polyethylene\nterephthalate (ITOP) substrate resulted in a transparent, flexible,\nstable electrode for WOR. The synthetic method used adsorbs minimal\nNi/Fe on the ITOP surface, reducing costs and environmental impact.\nThese trace amounts of ions are effective in WOR and maintain the\nITOP’s transparency, preserving its visual clarity. The electrode\nwas applied for WOR during the electrolysis of the baking soda solution.\nThe Tafel plot reveals a linear correlation between the logarithm\nof current density (log(j)) and overpotential, with a Tafel slope\nof 59.2 mV/decade. Notably, the onset of WOR, depicted in the Tafel\nplot, occurs at 1.60 V (overpotential: 370 mV).