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Tri-metalltic phytate in-situ electrodeposited on 3D Ni foam as highly efficient electrocatalysts for enhanced overall water splitting

Abstract

An interconnected catalyst architecture has been in-situ fabricated on Ni foam through a facile electrochemical corrosion in sodium phytate containing Co and Fe metals ions. The introduction of bimetal in N-phy system enables the phytate ions to link more active metal ions and then creates abundant catalytic sites to enhance the water oxidation performance and simultaneously to improve overall water splitting activity. As a result, this self-supported C6FN-phy electrode delivers a high current density of 200 mA cm–2 at an overpotential of 285 mV for oxygen production and at 327 mV for the hydrogen evolution in 1 M KOH, surpassing most catalysts recently reported. Besides, the electrocatalytic activity can be maintained for at least 45 h with subtle potential increase, illustrating the versatile and practical application in the industry. What’s more, we achieve a current density of 100 mA cm–2 at 1.91 V by using C6FN-phy as the cathode and anode for overall water splitting, which is well comparable to the integrated performance of Pt/C and RuO2. Most importantly, multiple alternating chronopotentiometric tests of C6FN-phy as both OER and HER catalyst also verifies the high availability and robust durability of the electrode as a true bifunctional electrocatalyst.

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Publication details

The article was received on 20 Jun 2017, accepted on 09 Aug 2017 and first published on 09 Aug 2017


Article type: Paper
DOI: 10.1039/C7TA05386J
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Tri-metalltic phytate in-situ electrodeposited on 3D Ni foam as highly efficient electrocatalysts for enhanced overall water splitting

    X. Chen, P. Li, Z. jin, Y. Meng, H. Yuan and D. Xiao, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA05386J

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