化工进展 ›› 2019, Vol. 38 ›› Issue (05): 2372-2379.DOI: 10.16085/j.issn.1000-6613.2018-1398

• 工业催化 • 上一篇    下一篇

水热法制备Ni/Nd2O3催化剂及其催化水合联氨制氢

张欢1(),马敬环1,马云超2,刘莹1(),王嘉豪1,苏彦铭1,刘晓涯1,戴莉3   

  1. 1. 天津工业大学环境与化学工程学院,天津 300387
    2. 吉林石化公司工程造价部,吉林 吉林 132022
    3. 山东农业大学化学与材料科学学院,山东 泰安 271018
  • 收稿日期:2018-07-09 修回日期:2018-11-15 出版日期:2019-05-05 发布日期:2019-05-05
  • 通讯作者: 刘莹
  • 作者简介:<named-content content-type="corresp-name">张欢</named-content>(1992—),女,硕士研究生,研究方向为环境催化。E-mail:<email>zhanghuan0716@163.com</email>。
  • 基金资助:
    国家自然科学基金(51508384)

Preparation of Ni/Nd2O3 catalysts by hydrothermal method and its catalytic decomposition of hydrated hydrazine for hydrogen production

Huan ZHANG1(),Jinghuan MA1,Yunchao MA2,Ying LIU1(),Jiahao WANG1,Yanming SU1,Xiaoya LIU1,Li DAI3   

  1. 1. School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China
    2. Engineering Cost Department of Jilin Petrochemical Company, Jilin 132022, Jilin, China
    3. College of Chemistry and Material Science, Shandong Agricultural University, Tai’an 271018, Shandong, China
  • Received:2018-07-09 Revised:2018-11-15 Online:2019-05-05 Published:2019-05-05
  • Contact: Ying LIU

摘要:

采用水热合成法制备了Ni/Nd2O3催化剂,对其催化水合联氨制氢性能进行了考察,探讨了催化剂合成条件及催化体系中NaOH浓度对催化性能的影响,并采用XRD、XPS、TEM、TG对催化剂进行了分析表征。结果表明,当Ni/Nd=94∶6、水热条件为8h、120℃时,合成的Ni/Nd2O3催化剂在催化水合联氨制氢时表现出了最优的催化性能,其H2选择性为95.9%。该催化剂中Ni的结晶度较高,Nd以Nd2O3的形式存在,具有促进颗粒分散、暴露活性位点、协助Ni、Nd电子转移等优点。与不加NaOH溶液的催化制氢体系相比,当NaOH的加入浓度为1.3mol/L时,催化剂催化水合联氨的制氢速率提高了约3.7倍。催化剂可维持良好的稳定性,循环使用5次后H2选择性仍高达94.4%。

关键词: Ni/Nd2O3催化剂, 水热, 合成, 水合联氨, 制氢

Abstract:

Ni/Nd2O3 catalyst was prepared by hydrothermal method, and its performance in hydrogen production was investigated. The effects of the catalyst synthesis condition and NaOH concentration on the catalytic performance were discussed, and the catalyst was characterized by XRD, XPS, TEM and TG. The results show that when the catalyst with a Ni/Nd molar ratio of 94∶6 and reaction time 8h at 120℃,the highest H2 selectivity of 95.9% could be achieved. The crystallinity of Ni of the catalyst is fairly high and the Nd species exist in the form of Nd2O3, which is beneficial for promoting particle dispersion, exposing active sites and assisting the electron transfer between Ni and Nd. NaOH with varied concentration can change the alkaline state of the system, compared with the reaction system without NaOH solution. When the NaOH concentration is 1.3mol/L, the hydrogen production rate is increased about 3.7 times. After 5 times of catalyst cycling, the selectivity of H2 is still up to 94.4%, which indicates that the catalyst by hydrothermal synthesis has good stability.

Key words: Ni/Nd2O3 catalyst, hydrothermal, synthesis, hydration hydrazine, hydrogen production

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