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N-doped Carbon Shelled Bimetallic Phosphates for Efficient Electrochemical Overall Water Splitting

Abstract

Metal phosphates are regarded as promising electrocatalysts, while their activity and stability for overall water splitting are not yet fully satisfied. In order to overcome those limitations, herein we develop a new class of N-doped carbon shelled bimetallic phosphates ((FexCoy)P2O7@N-C) as efficient electrocatalyts for overall water splitting. The shelled bimetallic phosphates can lower the OER overpential of 100 mV compared with the unshelled phosphate counterpart as well as superior stability up to 80 h under the high current density of 40 mA cm-2 for alkaline water splitting. Detailed studies reveal that the newly formed metal oxyhydroxide/oxide/hydroxide during electrocatalysis play key roles on the activity enhancement. In addition, the N-doped carbon shell can largely prevent serious corrosion/aggregration with the surface environment largely maintained, showing an unique strategy for designing non-precious electrocatalysts with largely improved activity and stability for overall water splitting and beyond.

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Publication details

The article was received on 24 Sep 2018, accepted on 05 Nov 2018 and first published on 05 Nov 2018


Article type: Paper
DOI: 10.1039/C8NR07756H
Citation: Nanoscale, 2018, Accepted Manuscript
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    N-doped Carbon Shelled Bimetallic Phosphates for Efficient Electrochemical Overall Water Splitting

    D. Zhao, Q. Shao, Y. Zhang and X. Huang, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR07756H

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