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Facile in-situ growth of Ni2P/Fe2P nanohybrids on Ni foam for highly efficient urea electrolysis
- Yan, Lei, Sun, Yulin, Hu, Enlai, Ning, Jiqiang, Zhong, Yijun, Zhang, Ziyang, Hu, Yong
- Journal of colloid and interface science 2019 v.541 pp. 279-286
- catalysts, electric potential, electrodes, electrolysis, energy conservation, ferric chloride, foams, hydrogen production, iron, nanohybrids, nickel, thermodynamics, urea
- Urea electrolysis is regarded as an alternative energy-saving hydrogen production technique to replace the conventional water splitting method due to the predicted lower thermodynamic potential. Herein, we demonstrate a robust and mass-produced strategy to in-situ grow Ni2P/Fe2P nanohybrids on Ni foam (Ni2P/Fe2P/NF) as an advanced electrode for overall urea electrolysis via a 30 s manual shaking reaction of FeCl3·6H2O, K3[Fe(CN)6] and pre-treated NF, followed by a facile phosphorization treatment. The as-prepared Ni2P/Fe2P/NF electrode exhibits high activity for the HER at 115 mV and UOR at 1.36 V with the current density of 10 mA cm−2, and only a cell voltage of 1.47 V is required to deliver the current density of 10 mA cm−2. This work reveals a promising industrializable pathway to develop non-noble materials as bifunctional catalysts.