Photoelectrochemical Behavior of Nanoporous Oxide of FeNdB Alloy. Issue 4 (30th January 2015)

• Record Type: Journal Article
• Authors: Chitrada, Kalyan; Raja, Krishnan S.; Rodriguez, David; Chidambaram, Dev
• Is Part Of: Journal of the Electrochemical Society. Volume 162:Issue 4(2015)
• Page Start: H220
• Page End: H228
• Publication Date: 2015-01-30
• Subjects: Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0511504jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Oxide nanoporous layer was synthesized by electrochemical anodization of commercially available sintered Fe14 Nd2 B permanent magnets. The anodized oxide layer consisted of predominantly α-Fe2 O3 alloyed with Nd and B ions. The photoelectrochemical behavior of the anodic oxide was compared with thermally oxidized counterpart and the iron oxides obtained by anodization and thermal oxidation of pure iron foil. The oxide of FeNdB showed higher electron density of states, charge carrier density, and lower bandgap than the un-alloyed iron oxide. The catalytic activity of FeNdB oxide for the oxygen evolution reaction was slightly higher than that of the un-alloyed iron oxide. However, the photocatalytic behavior of the FeNdB oxide was inferior to the iron oxide, which could be attributed to the increased charge recombination and hole accumulation occurring at the FeNdB oxide surface.