Acta Chimica Sinica ›› 2025, Vol. 83 ›› Issue (11): 1340-1348.DOI: 10.6023/A25060229 Previous Articles     Next Articles

Article

水滑石限域Ni纳米颗粒催化氮甲基吲哚高效储氢

全洪林a, 唐鋆磊a, 张承志a, 张恒溢a, 李佳奇b,*(), 周太刚a,c,*()   

  1. a 西南石油大学化学化工学院 成都 610500
    b 中国农业大学理学院 北京 100193
    c 天府永兴实验室 成都 610217
  • 投稿日期:2025-06-19 发布日期:2025-08-12
  • 通讯作者: 李佳奇, 周太刚
  • 基金资助:
    天府永兴实验室有组织科研(2023KJGG10); 西南石油大学自然科学(2021JBGS07)

Hydrotalcite-Confined Ni Nanoparticles Catalyzed Efficient Hydrogen Storage of N-Methylindole

Quan Honglina, Tang Junleia, Zhang Chengzhia, Zhang Hengyia, Li Jiaqib,*(), Zhou Taiganga,c,*()   

  1. a College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500
    b College of Science, China Agricultural University, Beijing 100193
    c Tianfu Yongxing Laboratory, Chengdu, 610217
  • Received:2025-06-19 Published:2025-08-12
  • Contact: Li Jiaqi, Zhou Taigang
  • Supported by:
    Tianfu Yongxing Laboratory Organized Research Project Funding(2023KJGG10); Science and Technology Project of Southwest Petroleum University(2021JBGS07)

The advancement of non-noble metal catalysts holds immense importance for the broad industrial use of organic liquid hydrogen storage. In this study, NiaAlb-layered double hydroxides (LDHs) were synthesized via co-precipitation method. Typically, a mixed solution of 100 mL Ni(NO3)2•6H2O and Al(NO3)3•9H2O was dropped into 100 mL Na2CO3 solution under vigorous stirring. The precipitation was carried out at room temperature, to achieve the desired pH value, a 3 mol/L NaOH solution was added to maintain the solution pH between 10±0.5. The resultant green precipitate underwent centrifugation and washing until nearly neutral, followed by drying for an extended period at 110 ℃. Thereafter, the sample was subjected to reduction at different temperatures for a duration of 2 h, with a meticulously controlled heating rate of 2.5 ℃/min. Finally, the influence of the Ni/Al ratio and reduction temperature on the catalytic activity was examined. The catalyst obtained by reducing NiAl-LDH at 450 ℃ (Ni2Al1-re450) exhibited the highest activity among the catalyst samples examined. Structural and compositional analyses of the catalyst were carried out using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), inductively coupled plasma optical emission spectrometry (ICP-OES), and N2 physisorption analysis (BET). The results indicated that the high hydrogenation activity of Ni2Al1-re450 was attributed to its larger specific surface area and smaller nickel particle size. Under the optimized reaction conditions (150 ℃, 6 MPa H2, 2 h), the catalyst achieved a 100% conversion rate of NMID and a yield of 8H-NMID of 96.06% in a batch reactor, surpassing the commercial 0.5%Ru/Al2O3 hydrogenation catalyst. The hydrogenation reaction rate of NMID was positively correlated with temperature, with an apparent activation energy of 61.25 kJ/mol and a turnover frequency (TOF) of 52.62 h-1. Moreover, Ni2Al1-re450 was continuously operated for 100 h in a micro packed-bed reactor under reaction conditions of 180 ℃ and 6 MPa. The results showed that the NMID conversion rate remained stable between 97%~100%, the selectivity for 8H-NMID was 97%~100%, and the hydrogen storage capacity was 5.55% (w)~5.76% (w).

Key words: organic liquid hydrogen storage, nickel catalyst, N-methylindole, nickel aluminum layered double hydroxide