Three-dimensional coral-like cobalt selenide as an advanced electrocatalyst for highly efficient oxygen evolution reaction. (10th March 2016)

• Record Type: Journal Article
• Authors: Liao, Mei; Zeng, Guangfeng; Luo, Tingting; Jin, Zhaoyu; Wang, Yujue; Kou, Xingming; Xiao, Dan
• Is Part Of: Electrochimica acta. Volume 194(2016)
• Page Start: 59
• Page End: 66
• Publication Date: 2016-03-10
• Subjects: Oxygen evolution reaction (OER) -- coral-like CoSe -- RuO2 -- electrocatalyst -- solvothermal reaction method; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2016.02.046
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Oxygen evolution reaction (OER) influences some important renewable energy technologies such as water splitting. Although many OER electrocatalysts have been studied to surmount this difficult problem, the development of a highly active, inexpensive and sustained OER electrocatalyst is still a great challenge. In this study, we report a novel, cost-effective cobalt selenide (coral-like CoSe) electrocatalyst with high current density (∼97.5 mA cm −2 at 1.606 V vs. RHE) and strong durability in alkaline media. The chronoamperometric response of coral-like CoSe electrocatalyst can remain 98% of its initial current density after 10000 s at the overpotential of 350 mV in 1 M KOH. The prepared coral-like CoSe electrode exhibits a low overpotential of 295 mV at a current density of 10 mA cm −2 and a small Tafel slope of 40 mV dec −1, which exceeds previously reported state-of-art RuO2 electrocatalyst and is much better than CoSe nanoparticles (CoSe NPs) and precursor Co(OH)2 electrocatalysts. This work affords us a 3D Co-based electrocatalyst with high performance and strong durability under alkaline conditions, which can be applied to energy conversion and storage processes.