发电技术 ›› 2023, Vol. 44 ›› Issue (3): 373-381.DOI: 10.12096/j.2096-4528.pgt.22142

• 绿氢制备-存储-多场景应用关键技术 • 上一篇    下一篇

氮掺杂介孔碳负载钴催化剂的制备及其脱除富氢气体CO性能研究

王海光, 刘永峰, 张军   

  1. 北京建筑大学机电与车辆工程学院,北京市 西城区 100044
  • 收稿日期:2022-12-01 出版日期:2023-06-30 发布日期:2023-06-30
  • 通讯作者: 刘永峰
  • 作者简介:王海光(1980),男,博士研究生,研究方向为氢能与燃料电池技术,richgas@126.com
    刘永峰(1973),男,博士,教授,研究方向为氢能与车辆燃料电池技术,本文通信作者,liuyongfeng@bucea.edu.cn
    张军(1972),男,博士,教授,研究方向为车辆/轨道系统动力学,zhangjun611@bucea.edu.cn
  • 基金资助:
    国家自然科学基金项目(51976007);汽车安全与节能国家重点实验室开放基金课题(KFY2218)

Preparation of Nitrogen Doped Mesoporous Carbon Supported Cobalt Catalyst and Its Performance for Removal of CO in Hydrogen-Rich Gas

Haiguang WANG, Yongfeng LIU, Jun ZHANG   

  1. School of Mechanical-Electronic and Vehicle Engineering, Beijing University of Civil Engineering and Architecture, Xicheng District, Beijing 100044, China
  • Received:2022-12-01 Published:2023-06-30 Online:2023-06-30
  • Contact: Yongfeng LIU
  • Supported by:
    National Natural Science Foundation of China(51976007);Open Fund Project of State Key Laboratory of Automotive Safety and Energy(KFY2218)

摘要:

为有效脱除富氢气体中的CO,制备了氮掺杂的有序介孔碳及其负载纳米钴颗粒的催化剂,采用N2吸附-脱附、X射线衍射(X-ray diffraction,XRD)、拉曼光谱、X射线光电子能谱(X-ray photoelectron spectroscopy,XPS)、热重-质谱联用(thermogravimetry-mass spectrometry,TG-MS)等手段进行表征,研究了氮掺杂对有序介孔碳负载钴基催化剂的自还原行为和CO甲烷化反应性能的影响规律。结果表明,在介孔碳骨架中引入的氮原子主要作为氧化钴的成核位点,与氧化物载体产生较强的相互作用,大大提高了钴物种的分散度,从而形成颗粒尺寸均匀的小纳米钴颗粒,显著促进了其自还原反应,进而提高了催化剂的还原度。催化剂评价结果表明,与未掺杂氮的介孔碳载体相比,氮掺杂介孔碳载体使催化剂的CO脱除效率明显提升。

关键词: 燃料电池, 氮掺杂, 介孔碳, 自还原, 甲烷化, CO脱除

Abstract:

In order to effectively remove CO from hydrogen-rich gas, cobalt-based nano-particle catalyst supported on nitrogen-doped ordered mesoporous carbon was prepared and characterized by X-ray diffraction (XRD), Raman spectrum, X-ray photoelectron spectroscopy (XPS) and thermogravimetry-mass spectrometry (TG-MS). The effects of nitrogen doping on the self-reduction behavior of the catalyst and CO methanation reaction performance were studied. The characterization results show that the nitrogen atoms introduced into the mesoporous carbon skeleton are mainly used as the nucleation sites of cobalt oxide, which have a strong interaction with the oxide carrier, and greatly improve the dispersion of cobalt species. Thus, small nano-cobalt particles with uniform particle size are formed, which significantly promote self-reduction reaction and thereby improve the reduction degree of the catalyst. The catalyst evaluation results show that, compared with the mesoporous carbon carrier without doping, the CO removal efficiency of the catalyst doped by nitrogen is much higher.

Key words: fuel cell, nitrogen doping, mesoporous carbon, self-reduction, methanation, CO removal

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