Activating CoOOH Porous Nanosheet Arrays by Partial Iron Substitution for Efficient Oxygen Evolution Reaction

作者：Ye, Sheng-Hua; Shi, Zi-Xiao; Feng, Jin-Xian; Tong, Ye-Xiang; Li, Gao-Ren^*

来源：Angewandte Chemie - International Edition, 2018, 57(10): 2672-2676.

DOI：10.1002/anie.201712549

• CoOOH
• electrocatalysis
• iron
• nanosheets
• oxygen evolution reaction

Iron-substituted CoOOH porous nanosheet arrays grown on carbon fiber cloth (denoted as FexCo1-xOOH PNSAs/CFC, 0x0.33) with 3D hierarchical structures are synthesized by insitu anodic oxidation of -Co(OH)(2) NSAs/CFC in solution of 0.01m (NH4)(2)Fe(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 -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 insitu anodic oxidation time. Fe0.33Co0.67OOH PNSAs/CFC shows superior OER electrocatalytic performance, with a low overpotential of 266mV at 10mAcm(-2), small Tafel slope of 30mVdec(-1), and high durability.

• 出版日期2018-3-1
• 单位中山大学