The magnetic susceptibility X of small particles of Pt–Fe alloys has been measured between 77 and 700 K in H2 and O2. High temperature values of X correspond to the paramagnetic behaviour of bulk alloys. Low temperature values of X indicate superparamagnetism. The data also show that at room temperature H2 removes only part of oxygen preadsorbed at the surface of these alloys.
C. H. Bartholomew, J. H. Anderson and M. Boudart, J. Chem. Soc., Faraday Trans. 1, 1979, 75, 257 DOI: 10.1039/F19797500257
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