Improved Electrochemical Alkaline Seawater Oxidation over Cobalt Carbonate Hydroxide Nanowire Array by Iron Doping
Shaorui Shi, Shengjun Sun, Xun He, Longcheng Zhang, Hui Zhang, Kai Dong, Zhengwei Cai, Dongdong Zheng, Yuntong Sun, Yongsong Luo, Qian Liu, Binwu Ying, Bo Tang, Xuping Sun, Walter Hu
Abstract
Constructing efficient and low-cost oxygen evolution reaction (OER) catalysts operating in seawater is essential for green hydrogen production but remains a great challenge. In this study, we report an iron doped cobalt carbonate hydroxide nanowire array on nickel foam (Fe-CoCH/NF) as a high-efficiency OER electrocatalyst. In alkaline seawater, such Fe-CoCH/NF demands an overpotential of 387 mV to drive 500 mA cm –2, superior to that of CoCH/NF (597 mV). Moreover, it achieves excellent electrochemical and structural stability in alkaline seawater.
Topics & Concepts
ChemistryHydroxideSeawaterElectrochemistryCarbonateDopingCobaltNanowireInorganic chemistryCobalt hydroxideChemical engineeringNanotechnologyElectrodeOrganic chemistryOceanographyGeologyPhysicsMaterials scienceEngineeringOptoelectronicsPhysical chemistryElectrocatalysts for Energy ConversionAdvanced battery technologies researchElectrochemical Analysis and Applications