Laser‐Ablation‐Produced Cobalt Nickel Phosphate with High‐Valence Nickel Ions as an Active Catalyst for the Oxygen Evolution Reaction. Issue 13 (18th February 2020)

• Record Type: Journal Article
• Authors: Sun, Xuechun; Wang, Jiaqi; Yin, Yuehui; Wang, Haibin; Li, Shuang; Liu, Hui; Mao, Jing; Du, Xiwen
• Is Part Of: Chemistry. Volume 26:Issue 13(2020)
• Page Start: 2793
• Page End: 2797
• Publication Date: 2020-02-18
• Subjects: cobalt nickel phosphate -- high valence states -- oxygen evolution reaction -- pulsed laser ablation in liquids; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201904510
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Cost‐effective, highly efficient and stable non‐noble metal‐based catalysts for the oxygen evolution reaction (OER) are very crucial for energy storage and conversion. Here, an amorphous cobalt nickel phosphate (CoNiPO4 ), containing a considerable amount of high‐valence Ni 3+ species as an efficient electrocatalyst for OER in alkaline solution, is reported. The catalyst was converted from Co‐doped Ni2 P through pulsed laser ablation in liquid (PLAL) and exhibits a large specific surface area of 162.5 m 2 g −1 and a low overpotential of 238 mV at 10 mA cm −2 with a Tafel slope of 46 mV dec −1, which is much lower than those of commercial RuO2 and IrO2 . This work demonstrates that PLAL is a powerful technology for generating amorphous CoNiPO4 with high‐valence Ni 3+, thus paving a new way towards highly effective OER catalysts. Abstract : Oxygen evolution : Cobalt nickel phosphate, oxidized from Co‐doped Ni2 P by pulsed laser ablation in liquid, contains high‐valence cations and a large specific surface area. These superiorities, compared with phosphate obtained by electrochemical oxidation, lead to a catalyst with excellent performance in the oxygen evolution reaction.