Preparation of TiO<sub>2</sub> nanotubes loaded with palladium-based catalyst and its efficient dehydrogenation performance for N-methylindole

LI Wen; SUN Chuanran; HE Lei; WANG Lin; MA Xiaoyu; ZHOU Taigang; LEI Xianzhang

doi:10.12434/j.issn.2097-2547.20250386

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Preparation of TiO₂ nanotubes loaded with palladium-based catalyst and its efficient dehydrogenation performance for N-methylindole

更新时间：2026-06-25

- Preparation of TiO₂ nanotubes loaded with palladium-based catalyst and its efficient dehydrogenation performance for N-methylindole
- Vol. 51, Issue 6, Pages: 104-114(2026)
- 作者机构：
  
  1.西南石油大学化学化工学院，四川成都 611930
  2.天府永兴实验室，四川成都 610213
  3.雅砻江流域水电开发有限公司，四川成都 610051
  4.成都烁克科技有限公司，四川成都 610041
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20250386
  CLC： TQ032
- Received：26 September 2025，
  
  Revised：2025-10-24，
  
  Published：25 June 2026
- 稿件说明：
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李雯,孙川然,何磊等.TiO₂纳米管负载钯基催化剂的制备及其N-甲基吲哚高效脱氢性能[J].低碳化学与化工,2026,51(6):104-114. DOI: 10.12434/j.issn.2097-2547.20250386.

LI Wen,SUN Chuanran,HE Lei,et al.Preparation of TiO₂ nanotubes loaded with palladium-based catalyst and its efficient dehydrogenation performance for N-methylindole[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(6):104-114. DOI: 10.12434/j.issn.2097-2547.20250386.
李雯,孙川然,何磊等.TiO₂纳米管负载钯基催化剂的制备及其N-甲基吲哚高效脱氢性能[J].低碳化学与化工,2026,51(6):104-114. DOI: 10.12434/j.issn.2097-2547.20250386. DOI：

LI Wen,SUN Chuanran,HE Lei,et al.Preparation of TiO₂ nanotubes loaded with palladium-based catalyst and its efficient dehydrogenation performance for N-methylindole[J].Low-Carbon Chemistry and Chemical Engineering,2026,51(6):104-114. DOI: 10.12434/j.issn.2097-2547.20250386. DOI：

摘要

液态有机氢载体（LOHC）储氢安全性能高、反应条件温和，是一种具有发展前景的储氢策略。然而，该技术的脱氢反应对催化剂要求较高，开发在低温条件下实现LOHC高效脱氢的催化剂至关重要。采用高温水热法合成了一系列TiO

纳米管（TNT）载体，并通过浸渍法负载Pd，制备了不同Pd基催化剂，考察了其对八氢-N-甲基吲哚（8H-NMID）的脱氢性能。采用XRD、SEM、TEM和XPS等对催化剂的物化性质进行了表征，并探究了催化剂的构效关系。结果表明，水热处理可以增大催化剂的比表面积和氧空位密度，其中Pd/TNT-150-24的比表面积和氧空位密度最大。Pd/TNT-150-24催化性能良好，在180 ℃下反应6 h能够实现8H-NMID完全脱氢，该催化剂的8H-NMID转化率和N-甲基吲哚（NMID）选择性均可达到100%。动力学研究表明，8H-NMID的脱氢速率与反应温度呈正相关，表观活化能为134.48 kJ/mol。此外，Pd/TNT-150-24具有良好的稳定性，连续运行5次后，其脱氢效率仍保持在84.8%。

Abstract

Liquid organic hydrogen carriers (LOHC) represent a promising hydrogen storage strategy owing to their high safety and mild reaction conditions. However

the dehydrogenation reaction of LOHC imposes stringent requirements on the catalysts

thus the development of highly efficient catalysts capable of achieving dehydrogenation under low-temperature conditions is essential. A series of titanium nanotube (TNT) supports were synthesized via high-temperature hydrothermal method

and various supported Pd-based catalysts were prepared by loading Pd onto the supports through the impregnation method and the dehydrogenation performance for 8H-N-methylindole (8H-NMID) was evaluated. The physicochemical properties of catalysts were characterized by XRD

SEM

TEM

XPS

etc.

and the structure-activity relationships of catalysts were explored. The results show that hydrothermal treatment increases the catalyst’s specific surface area and oxygen vacancy density

among which the Pd/TNT-150-24 catalyst exhibits the maximum specific surface area and oxygen vacancy density. Pd/TNT-150-24 displays excellent catalytic performance. After reacting at 180 ℃ for 6 h

it can achieve complete dehydrogenation of 8H-NMID. The conversion rate of 8H-NMID and the selectivity of N-methylindole (NMID) of this catalyst can both reach 100%. The dehydrogenation reaction rate of 8H-NMID is positively correlated with reaction temperature

with an apparent activation energy of 134.48 kJ/mol. Additionally

Pd/TNT-150-24 demonstrates good stability

retaining a dehydrogenation efficiency of 84.8% after five consecutive reaction cycles.

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references

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Preparation of TiO2 nanotubes loaded with palladium-based catalyst and its efficient dehydrogenation performance for N-methylindole

DOI：10.12434/j.issn.2097-2547.20250386

摘要

Abstract

关键词

Keywords

references

Preparation of TiO₂ nanotubes loaded with palladium-based catalyst and its efficient dehydrogenation performance for N-methylindole