Highly-active oxygen evolution electrocatalyzed by a Fe-doped NiSe nanoflake array electrode. Issue 24 (3rd March 2016)

• Record Type: Journal Article
• Authors: Tang, Chun; Asiri, Abdullah M.; Sun, Xuping
• Is Part Of: Chemical communications. Volume 52:Issue 24(2016)
• Page Start: 4529
• Page End: 4532
• Publication Date: 2016-03-03
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c5cc10576e
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : A Fe-doped NiSe nanoflake array in situ hydrothermally grown on a macroporous FeNi foam behaves as a highly-active robust oxygen evolution electrode, capable of driving 1000 mA cm −2 at an overpotential of 263 mV in 30 wt% KOH at room temperature. Abstract : Alkaline water electrolysis offers a simple method for mass production of hydrogen but suffers from the sluggish kinetics of the anodic oxygen evolution reaction (OER), calling for the development of low-cost and durable oxygen evolution electrocatalysts with high activity. In this communication, we report a highly-active robust oxygen evolution electrode, developed by in situ hydrothermal growth of an Fe-doped NiSe nanoflake array directly on a macroporous FeNi foam (Fe–NiSe/FeNi foam). This electrode catalyzes the OER with an onset overpotential as low as 200 mV and needs overpotentials of 245 and 264 mV to achieve 50 and 100 mA cm −2, respectively, in 1.0 M KOH. Remarkably, it is also highly robust to drive 500 and 1000 mA cm −2 at overpotentials of 246 and 263 mV, respectively, in 30 wt% KOH.