Study of surface effects and catalytic properties of selected Ni-based bimetallic nanoparticles by Knudsen effusion mass spectrometry

0509639 - ÚFM 2020 RIV GB eng J - Journal Article
Brož, P. - Hejduková, M. - Vykoukal, V. - Zelenka, F. - Sopoušek, J. - Buršík, Jiří - Zobač, Ondřej
Study of surface effects and catalytic properties of selected Ni-based bimetallic nanoparticles by Knudsen effusion mass spectrometry.
Calphad - Computer Coupling of Phase Diagrams and Thermochemistry. Roč. 64, MAR (2019), s. 334-341. ISSN 0364-5916. E-ISSN 1873-2984
R&D Projects: GA ČR(CZ) GA17-15405S; GA MŠMT(CZ) LQ1601
Institutional support: RVO:68081723
Keywords : bimetallic nanoparticles * Cu-Ni * Ag-Ni
OECD category: Thermodynamics
Impact factor: 1.947, year: 2019
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S036459161830244X?via%3Dihub

Surface effects and catalytic properties of CuNi, AgNi and AuNi bimetallic nanoparticles having diameter 10-30 nm were studied by Knudsen effusion mass spectrometry. The nanoalloys were prepared by solvothermal synthesis using oleylamine. Gradual removing of the organic substances, present on the nanoparticles from the synthesis, accompanied by their oxidation was observed during slow heating. The nanoparticle catalytic activity leading to the oxidation of the organic surface layer to CO2 in final step depends on the selected element in the Ni-based nanoalloy. The CuNi system shows the highest catalytic activity while the AuNi system the smallest one. As demonstrated, the KEMS method can be applied with advantage as a progressive tool for the evaluation of the oxidation catalytic activity of metal nanoparticles. The surface effects and the catalytic properties are discussed in view of our previous studies.
Permanent Link: http://hdl.handle.net/11104/0300686