Hydrogen gas sensor based on nanograined Pd/α-MoO3 belts
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CREŢU, Vasilii; POSTICA, Vasile; STOIANOV, D.; TROFIM, Viorel; ŞONTEA, Victor; LUPAN, Oleg. Hydrogen gas sensor based on nanograined Pd/α-MoO3 belts. In: IFMBE Proceedings 3rd International Conference on Nanotechnologies and Biomedical Engineering, ICNBME 2015. Editia 3-a, Vol. 55, 23-26 septembrie 2015, Chişinău. Springer, 2016, pp. 361-364.
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IFMBE Proceedings
Editia 3-a, Vol. 55, 2016
Conferința "International Conference on Nanotechnologies and Biomedical Engineering"
Chişinău, Moldova, 23-26 septembrie 2015

Hydrogen gas sensor based on nanograined Pd/α-MoO3 belts

DOI: https://doi.org/10.1007%2f978-981-287-736-9_87

Pag. 361-364

Creţu Vasilii1, Postica Vasile1, Stoianov D.1, Trofim Viorel1, Şontea Victor1, Lupan Oleg12
1 Technical University of Moldova,
2 Institute for Material Science, Christian-Albrechts-University of Kiel
Disponibil în IBN: 4 august 2022


In this work, a simple and cost-effective method for nanostructurization of α-MoO3 micro-belts by using an aqueous solution of PdCl2 is reported. Obtained nanograined Pd/α-MoO3 belts, with 70-80 nm average diameters of nanocrystallites were integrated in sensor structures for application in hydrogen gas sensing. In dependence of method for nanostructurization, a gas response of about 2 – 3 at 200 °C operating temperature was obtained. In case of K+ doped samples, the hydrogen response was enhanced to about 7.5. To explain the obtained results, the gas sensing mechanism based on catalyst properties of Pd nanoparticles and generation of oxygen vacancies is discussed in details. 

gas sensor, hydrogen, Mechanism, MoO3, Nanostructured

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