Preparation of Metallic Ni3N Nanoparticles and Its Electrooxidation Performance for Ethylene Glycol★
Received date: 2023-05-05
Online published: 2023-08-15
Supported by
College Student Innovation and Entrepreneurship Training Program(S202210487007); National Natural Science Foundation of China(22071069)
Coupled small molecule electrocatalytic oxidation reaction can not only reduce anode overpotential, improve hydrogen evolution reaction (HER) efficiency, but also produce high value-added chemicals, which is an effective strategy to improve the performance of electrocatalytic water splitting. The development of non-noble metal based electrocatalysts with high conductivity and low oxidation potential is the key issue. Herein, Ni3N nanoparticles (Ni3N-NPs) with low oxidation potential and high conductivity were prepared by annealing and nitriding Ni(OH)2 nanosheets precursors. Compared with Ni(OH)2, Ni3N-NPs has a smaller Faraday resistance, a lower oxidation potential, a smaller Tafel slope (29 mV•dec–1), and exhibits the better electrocatalytic oxidation performance towards ethylene glycol (EG). At 1.36 V, the Faraday efficiency of electrocatalytic EG oxidation to formate reached 91.16%. The structure of Ni3N-NPs before and after the electrocatalytic oxidation reaction was characterized in detail by X-ray diffractometer (XRD), transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS). It was found that in the electrocatalytic EG oxidation process, the surface of Ni3N-NPs was oxidized into NiOOH, while EG underwent dehydrogenation and oxidation to form formic acid on the catalyst surface, and the NiOOH was synchronously reduced by H and converted into Ni(OH)2. In addition, Ni3N-NPs has good universality for electrocatalytic oxidation of small organic molecules.
Key words： electrocatalysis; water splitting; ethylene glycol; Ni(OH)2; Ni3N
Zhenhong Yang , Xiaojuan Gan , Shuzhe Wang , Junyuan Duan , Tianyou Zhai , Youwen Liu . Preparation of Metallic Ni3N Nanoparticles and Its Electrooxidation Performance for Ethylene Glycol★[J]. Acta Chimica Sinica, 2023 , 81(11) : 1471 -1477 . DOI: 10.6023/A23050202
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