Amorphous Nanocages of Cu‐Ni‐Fe Hydr(oxy)oxide Prepared by Photocorrosion For Highly Efficient Oxygen Evolution. (25th February 2019)

• Record Type: Journal Article
• Authors: Cai, Zhi; Li, Lidong; Zhang, Youwei; Yang, Zhao; Yang, Jie; Guo, Yingjie; Guo, Lin
• Is Part Of: Angewandte Chemie. Volume 131:Number 13(2019)
• Page Start: 4233
• Page End: 4238
• Publication Date: 2019-02-25
• Subjects: Amorphe Materialien -- Massenaktivität -- Nanokäfige -- Sauerstoffentwicklungsreaktion -- Ternäres CuNiFe; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201812601
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Electrochemical water splitting requires efficient, low‐cost water oxidation catalysts to accelerate the sluggish kinetics of the water oxidation reaction. A rapid photocorrosion method is now used to synthesize the homogeneous amorphous nanocages of Cu‐Ni‐Fe hydr(oxy)oxide as a highly efficient electrocatalyst for the oxygen evolution reaction (OER). The as‐fabricated product exhibits a low overpotential of 224 mV on a glassy carbon electrode at 10 mA cm −2 (even lower down to 181 mV when supported on Ni foam) with a Tafel slope of 44 mV dec −1 for OER in an alkaline solution. The obtained catalyst shows an extraordinarily large mass activity of 1464.5 A g −1 at overpotential of 300 mV, which is the highest mass activity for OER. This synthetic strategy may open a brand new pathway to prepare copper‐based ternary amorphous nanocages for greatly enhanced oxygen evolution. Abstract : Rost ansetzen : Eine Methode zur raschen Photokorrosion wurde verwendet, um homogene amorphe Nanokäfige von Cu‐Ni‐Fe‐Hydr(oxy)oxid zu synthetisieren. Diese Nanokäfige sind bemerkenswert effiziente Elektrokatalysatoren für die Sauerstoffentwicklungsreaktion (OER).