TiO2 nanoparticle-supported Ni catalyst for the dehydrogenation of hydrazine hydrate

Ying Liu; Xiaoya Liu; Xinying Liu; Yajing Li; Jinghuan Ma; Cong Ma

doi:10.1016/j.chemosphere.2022.137608

TiO₂ nanoparticle-supported Ni catalyst for the dehydrogenation of hydrazine hydrate

Chemosphere. 2023 Feb:313:137608. doi: 10.1016/j.chemosphere.2022.137608. Epub 2022 Dec 19.

Authors

Ying Liu¹, Xiaoya Liu², Xinying Liu², Yajing Li², Jinghuan Ma³, Cong Ma⁴

Affiliations

¹ State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China; School of Chemical Engineering and Technology, National Engineering Research Center of Distillation Technology, Tianjin University, Tianjin, 300072, China; Pei-yang National Distillation Technology Corporation Limited, Tianjin, 300072, China.
² State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China.
³ State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China; Tianjin Haiyuanhui Technology Co., Ltd., Tianjin, 300457, China.
⁴ State Key Laboratory of Separation Membranes and Membrane Processes, School of Environmental Science and Engineering, Tiangong University, Tianjin, 300387, China; Pei-yang National Distillation Technology Corporation Limited, Tianjin, 300072, China; Tianjin Haiyuanhui Technology Co., Ltd., Tianjin, 300457, China. Electronic address: macong_0805@126.com.

PMID: 36549511
DOI: 10.1016/j.chemosphere.2022.137608

Abstract

As one of the key factors that affect the application of hydrazine hydrate as a potential hydrogen source, efficient and cheap catalyst is particularly important. Nickel based catalysts have been widely studied because of their excellent catalytic performance for the decomposition of hydrazine hydrate to hydrogen. Herein, a Ni catalyst supported on anatase TiO₂ through reduction and impregnation methods was prepared. Structure of the catalyst was investigated by transmission electron microscopy (TEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), and X-ray photoelectron spectroscopy (XPS). The effects of the amount of TiO₂ and the concentration of NaOH on the activity of the catalyst were investigated. The results showed that the catalyst prepared with a metal nickel content of 0.2 mmol using 100 mg of the nano-TiO₂ support had the best catalytic performance. Hydrazine hydrate could be completely decomposed at 343 K in 2.83 min, the hydrogen selectivity attained 100%, and the turnover frequency (TOF) value was 265.49 h^-1. In this catalyst, transition metal Ni was dispersed on the support surface in the form of amorphous elemental or oxide. Anatase TiO₂ support had the advantages of promoting the dispersion of metal Ni, exposing the active site, changing the electronic state of the active center, strengthening the strong metal-support interaction (SMSI), and improving the activity of the catalyst. After ten cycles of use, the performance of the catalyst stabilized and the hydrogen selectivity was still as high as 100%.

Keywords: Hydrazine hydrate; Hydrogen generation; Nanocatalyst; Nickel.

MeSH terms

Hydrogen / chemistry
Nanoparticles*
Nickel* / chemistry

Substances

titanium dioxide
hydrazine
Nickel
Hydrogen