Constructing heterostructured CoSe2/Ni3Se4@N-doped carbon nanosheets/ketjen black carbon as a robust oxygen evolution electrocatalyst. (6th November 2020)

• Record Type: Journal Article
• Authors: Liu, Guiyu; Zhang, Zhiliang; Li, Junhua; Liu, Jinlong; Long, Xuanda; Chen, Hong; Tong, Haixia; Liu, Zeng; Qian, Dong
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 55(2020)
• Page Start: 30666
• Page End: 30672
• Publication Date: 2020-11-06
• Subjects: CoSe2 -- Ni3Se4 -- Ketjen black carbon -- Synergism -- Electrocatalyst -- Oxygen evolution reaction; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.08.063
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: We design and construct a novel heterostructured CoSe2 /Ni3 Se4 @N-doped carbon nanosheets/Ketjen black carbon (denoted as CoSe2 /Ni3 Se4 @NC/KB) via the combination of pyrolysis and hydrothermal method. As a result of the exceptional synergism between CoSe2 and Ni3 Se4 as well as high conductivity of carbon materials, the obtained CoSe2 /Ni3 Se4 @NC/KB drives an OER current density of 10 mA cm −2 by an overpotential of 260 mV and displays a low Tafel slope of 68 mV dec −1, outmanoeuvring commercial RuO2 and IrO2, control groups (i.e. Ni3 Se4 @NC/KB, CoSe2 @NC/KB, and CoSe2 /Ni3 Se4 @NC), as well as most hybrids of selenides and carbon materials reported recently. Highlights: We design a novel heterostructured CoSe2 /Ni3 Se4 @NC/KB hybrid. This hybrid is constructed via the combination of pyrolysis and hydrothermal method. This hybrid affords excellent OER activity, superior to commercial RuO2 and IrO2 . The marked comprehensive properties of this hybrid are due to its rational structure.