Polycrystalline CoP/CoP2 Structures for Efficient Full Water Splitting. Issue 4 (28th December 2017)

• Record Type: Journal Article
• Authors: Li, Shanpeng; Zhang, Gong; Tu, Xinman; Li, Jinghong
• Is Part Of: ChemElectroChem. Volume 5:Issue 4(2018)
• Page Start: 701
• Page End: 707
• Publication Date: 2017-12-28
• Subjects: CoP -- heterostructures -- electrocatalysis -- water splitting; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.201701112
• Languages: English
• ISSNs: 2196-0216

Abstract

Abstract: Transition‐metal phosphides (TMPs) have attracted extensive attention for use in the field of full water splitting. Various methods have been investigated to obtain high catalytic activity, but in these synthetic processes other active materials are inevitably introduced to modify or load onto the surface of the TMP to further improve the catalytic performance. Herein, we describe a novel approach for preparing CoP/CoP2 structures (650 °C) by pyrolysis of a complex formed from Co ions crosslinked with phytic acid (PA) using 2‐methylimidazole (MeIM). The integration of CoP2 and CoP in the structures can enhance the intrinsic electrical conductivity, and facilitate electron transfer from solution to the electrode. Overpotentials of only 250 and 239 mV were required to support the current densities of 10 and 20 mA cm −2 for the oxygen evolution reaction and hydrogen evolution reaction, respectively, demonstrating the potential of the novel material for practical overall water splitting. Abstract : CoP a load of this : A novel type of polycrystalline material is developed by integrating CoP2 and CoP. The integration of CoP2 and CoP in the structures can enhance the intrinsic electrical conductivity and facilitate electron transfer from solution to the surface of electrode. This CoP/CoP2 mixed crystal material, as a bifunctional catalyst for the oxygen and hydrogen evolution reactions in alkaline solution, demonstrates the potential for practical overall water splitting.