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- Title
Activating CoOOH Porous Nanosheet Arrays by Partial Iron Substitution for Efficient Oxygen Evolution Reaction.
- Authors
Ye, Sheng‐Hua; Shi, Zi‐Xiao; Feng, Jin‐Xian; Tong, Ye‐Xiang; Li, Gao‐Ren
- Abstract
Abstract: Iron‐substituted CoOOH porous nanosheet arrays grown on carbon fiber cloth (denoted as FexCo1−xOOH PNSAs/CFC, 0≤x≤0.33) with 3D hierarchical structures are synthesized by in situ anodic oxidation of α‐Co(OH)2 NSAs/CFC in solution of 0.01 m (NH4)2Fe(SO4)2. X‐ray absorption fine spectra (XAFS) demonstrate that CoO6 octahedral structure in CoOOH can be partially substituted by FeO6 octahedrons during the transformation from α‐Co(OH)2 to FexCo1−xOOH, and this is confirmed for the first time in this study. The content of Fe in FexCo1−xOOH, no more than 1/3 of Co, can be controlled by adjusting the in situ anodic oxidation time. Fe0.33Co0.67OOH PNSAs/CFC shows superior OER electrocatalytic performance, with a low overpotential of 266 mV at 10 mA cm−2, small Tafel slope of 30 mV dec−1, and high durability.
- Subjects
CARBON compounds; POROUS materials; NANOPARTICLES; IRON; OXYGEN evolution reactions; ELECTROCATALYSIS
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 10, p2702
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201712549