Acta Chimica Sinica ›› 2023, Vol. 81 ›› Issue (11): 1471-1477.DOI: 10.6023/A23050202 Previous Articles     Next Articles

Special Issue: 庆祝《化学学报》创刊90周年合辑

Article

金属性Ni3N纳米粒子的制备与乙二醇电氧化性能★

杨镇鸿, 干晓娟, 王书哲, 段君元, 翟天佑, 刘友文*()   

  1. 华中科技大学材料科学与工程学院 材料成形与模具技术全国重点实验室 武汉 430074
  • 投稿日期:2023-05-05 发布日期:2023-08-14
  • 作者简介:
    †共同第一作者
    ★庆祝《化学学报》创刊90周年.
  • 基金资助:
    大学生创新创业训练计划(S202210487007); 国家自然科学基金(22071069)

Preparation of Metallic Ni3N Nanoparticles and Its Electrooxidation Performance for Ethylene Glycol★

Zhenhong Yang, Xiaojuan Gan, Shuzhe Wang, Junyuan Duan, Tianyou Zhai, Youwen Liu()   

  1. State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074
  • Received:2023-05-05 Published:2023-08-14
  • Contact: *E-mail: ywliu@hust.edu.cn
  • About author:
    †These authors contributed equally to this work
    ★Dedicated to the 90th anniversary of Acta Chimica Sinica.
  • 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