title: Self-Supported Cu-Based Nanowire Arrays as Noble-Metal-Free Electrocatalysts for Oxygen Evolution.
abstract: Crystalline Cu-based nanowire arrays (NWAs) including Cu(OH)2 , CuO, Cu2 O, and CuOx are facilely grown on Cu foil and are found to act as highly efficient, low-cost, and robust electrocatalysts for the oxygen evolution reaction (OER). Impressively, this noble-metal-free 3 D Cu(OH)2 -NWAs/Cu foil electrode shows the highest catalytic activity with a Tafel slope of 86 mV dec(-1) , an overpotential (η) of about 530 mV at ∼10 mA cm(-2) (controlled-potential electrolysis method without iR correction) and almost 100 % Faradic efficiency, paralleling the performance of the state-of-the-art RuO2 OER catalyst in 0.1 m NaOH solution (pH 12.8). To the best of our knowledge, this work represents one of the best results ever reported on Cu-based OER systems.
authors.affiliation: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, HKU-CAS Joint Laboratory on New Material, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.|University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100049, P.R. China.
authors.forename: Chun-Chao
authors.initials: CC
authors.lastname: Hou
authors.affiliation: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, HKU-CAS Joint Laboratory on New Material, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China.|College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming, 650092, P.R. China.
authors.forename: Wen-Fu
authors.initials: WF
authors.lastname: Fu
authors.affiliation: Key Laboratory of Photochemical Conversion and Optoelectronic Materials, HKU-CAS Joint Laboratory on New Material, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P.R. China. chenyong@mail.ipc.ac.cn.
authors.forename: Yong
authors.initials: Y
authors.lastname: Chen
mesh_terms: D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D004553:Electric Conductivity; D004563:Electrochemistry; D053770:Nanowires / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry*
chemical_list: D010087:Oxides; D003300:Copper; D010100:Oxygen
keywords: copper; electrocatalysis; nanowire arrays; noble-metal-free; water oxidation