Co(OH)2 hollow nanoflowers as highly efficient electrocatalysts for oxygen evolution reaction. Issue 5 (17th October 2017)

• Record Type: Journal Article
• Authors: Liu, Hongfei; Guo, Dingyi; Zhang, Wei; Cao, Rui
• Is Part Of: Journal of materials research. Volume 33:Issue 5(2018)
• Page Start: 568
• Page End: 580
• Publication Date: 2017-10-17
• Subjects: catalytic, -- water, -- energy generation; Materials -- Research -- Periodicals; 620.1105
• DOI: 10.1557/jmr.2017.390
• Languages: English
• ISSNs: 0884-2914

Abstract

Abstract: Abstract : Electrocatalytic water splitting for the production of H2 is increasingly becoming a significant method to mitigate the current energy crisis and environmental pollution. However, oxygen evolution reaction (OER), a slow four-electron progress, is the bottle neck of water splitting. Thus, developing new, low cost, and effective catalysts for OER is a research hotspot in material and energy resource fields. Therefore, the research of nonprecious, metal-based OER catalysts has been popular. In this work, it is validated that 3D hollow Co(OH)2 nanoflowers synthesized by a facile template-based strategy at room temperature are effective electrocatalysts for OER. The catalysts display high activity with a current density of 10 mA/cm 2 at an overpotential of 310 mV and a small Tafel slope of 68.9 mV/dec in alkaline condition. It's noteworthy that this material is stable for over 20 h of chronopotentiometry. This work offers a simple and promising way to prepare efficient and durable electrocatalysts.