石油炼制与化工 ›› 2023, Vol. 54 ›› Issue (7): 64-70.

• 催化剂 • 上一篇    下一篇

椰壳炭负载钌催化剂的制备及其催化氨硼烷水解制氢性能

王小燕,张若凡,司航,王海龙   

  1. 安徽工业大学化学与化工学院
  • 收稿日期:2023-02-10 修回日期:2023-04-01 出版日期:2023-07-12 发布日期:2023-06-21
  • 通讯作者: 王小燕 E-mail:15883724983@189.cn
  • 基金资助:
    安徽省自然科学基金青年基金项目;2022年国家级大学生创新创业训 练计划项目;2021年省级大学生创 新创业训练计划项目

PREPARATION OF COCONUT SHELL CARBON SUPPORTED RUTHENIUM AS A CATALYST FOR THE HYDROLYTIC DEHYDROGENATION OF AMMONIA BORANE


  • Received:2023-02-10 Revised:2023-04-01 Online:2023-07-12 Published:2023-06-21
  • Contact: Xiao-Yan WANG E-mail:15883724983@189.cn

摘要: 以椰壳炭(CSC)为载体,通过浸渍-还原法负载活性组分Ru,制得Ru/CSC催化剂,利用X射线衍射、X射线光电子能谱、透射电镜和N2吸附-脱附等一系列表征手段来探究催化剂的微观结构及形貌;进而考察了光照、金属负载量、反应物浓度、催化剂用量、反应温度等因素对氨硼烷水解制氢反应速率的影响。结果表明:Ru与CSC之间存在金属-载体相互作用;以1.0%Ru/CSC为催化剂催化氨硼烷水解制氢反应,其在可见光照射条件下的催化性能明显优于无光照条件;氨硼烷水解制氢速率与Ru/CSC浓度呈正相关关系,催化剂的界面反应是氨硼烷水解制氢的控速步骤,与氨硼烷浓度无关;以1.0 %Ru/CSC在298 K下光催化氨硼烷水解制氢反应的转化频率(TOF)为334.8min-1,表观活化能(Ea)为59.9 kJ/mol。

关键词: 钌, 催化剂, 椰壳炭, 氨硼烷, 水解制氢

Abstract: Ru/CSC catalysts were prepared by impregnation-reduction method using the coconut shell carbon (CSC) as support and Ru as active component, and the microstructure and morphology of the catalyst were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, TEM and N2 adsorption-desorption. The effects of light, metal loading, reactant concentration, catalyst dosage, and reaction temperature on the reaction rate of hydrogen production from ammonia borane hydrolysis were investigated. The results showed that there was a metal-support interaction between Ru and CSC, and the catalytic performance of 1.0% Ru/CSC catalyst for the hydrolysis of ammonia borane to hydrogen production under the condition of visible light irradiation was significantly better than that under the condition of no light irradiation. There was a positive correlation between the hydrogen production rate and Ru/CSC concentration. The interfacial reaction of catalyst was the rate-controlling step of hydrogen production from the hydrolysis of ammonia borane, which was independent of the concentration of ammonia borane. The conversion frequency (TOF) and apparent activation energy (Ea) were 334.8min-1 and 59.9 kJ/mol, respectively, for the photocatalytic hydrolysis of ammonia borane to hydrogen at 1.0% Ru/CSC at 298 K.

Key words: ruthenium, catalyst, coconut shell carbon, ammonia borane, hydrolytic dehydrogenation