A Comprehensive Treatise on Inorganic and Theoretical Chemistry

162 INORGANIC AND THEORETICAL, CHEMISTRY
with arsenic trichloride and platinum at ordinary temp, or at 100°. A. F. Gehlen,
and F. Rossler observed that antimony reacts when it is heated with platinum
very much as does arsenic, and the alloys were studied by V. A. Nemiloff and
M. M. Voronoff, and T. J. Poppema and F. M. Jager—vide 9. 52, 9 ; and H. E. Patten
found that the metal is not attacked by antimony pentachloride. A. F. Gehlen,
CT. Heycock and F. H. Neville, and F. Rossler also noted that bismuth readily
unites with platinum when a mixture of the two elements is heated—vide 9. 53, 7.
For the action of bismuth oxide, vide infra. F. E. Brown and J. E. Snyder found
that vanadium oxytrichloride has no action on platinum.
J. B. J. D. Boussingault, 19 and A. Colson found that at a red-heat platinum
does not unite with carbon. N. W. Fischer observed that in the inner cone of
the flame of a spirit-lamp, the surface of the metal is corroded. R. Chenevix and
H. V. Collet-JJescotils found that in a high temp, furnace, platinum forms a fusible
carbide, and J. B. J. D. Boussingault suggested that the presence of silicon favours
the breakdown of platinum under these conditions. A. B. Griffiths, and A. Remont
also noted that platinum is attacked by carbon at a red-heat—vide 5. 39, 20.
F. E. Carter observed no serious contamination when cast in graphite moulds,
but the metal even below the m.p. readily takes up carbon, and on cooling, the
carbon settles out between the crystal grains making the metal brittle and darker
in colour. The diffusion of carbon in platinum was studied by G. Tammann and
K. Schonert. F. Wohler noted that the presence of platinum increases the combustibility
of carbon. H. Wolbling studied the absorption of platinum by active
carbon. M. W. Travers noted the absorption of carbon by spluttered platinum ;
and W. P. White, the absorption of impurities by platinum at a high temp.
M. S. Belenky and co-workers, and S. Lewina and co-workers, studied activated
carbon metallized -with platinum.
The action of carbon monoxide on platinum has been discussed, 5. 39, 27.
W. Davies observed that combustion begins at 400°. A. Sieverts and E. Jurisch
found that carbon monoxide at 1136° is insoluble in compact platinum ; and
E. Harbeck, and E. Harbeck and G. Lunge, thought that with platinum black
a definite compound of carbon monoxide is formed, because the 60 vols, of carbon
monoxide absorbed at ordinary temp, are suddenly liberated at 250°. B. W. Bradford
studied the thermionic emission during the oxidation of carbon monoxide.
H. S. Taylor and R. M. Burns showed that at 25°, 110°, and 218°, 1 vol. of
spongy platinum absorbed, respectively, 1-20, 085, and 0*45 vol. of carbon
monoxide, and at 25° and 110°, platinum black absorbed, respectively, 18*0 and
19*7 vols, of carbon monoxide. A. F. Benton said that at 25°, and 1 atm. press.,
platinum black absorbed 37-8 vols, of carbon monoxide. B. Delachanal observed
that 3*19 to 4*05 c.c. of carbon monoxide were absorbed by about 15O grms. of
commercial platinum. A. Osawa observed that the arrangement of the atoms in
the space-lattice of platinum black is not affected by the absorption of carbon
monoxide, but there is a linear expansion of 2*8 per cent. C. Paal showed that
carbon monoxide is oxidized at ordinary temp, in the presence of a soln. of colloidal
platinum. K. A. Hofmann and O. Schneider found that the catalytic activity
of the platinum metals in the oxidation of carbon monoxide in the presence of a
soln. of sodium chlorate, decreases in the order Os, Rh, Au, Pt, Ru, Pd, Ir, and Ag.
F. P. Bowden and E. K. Rideal, A. Hocart, W. Davies, and A. E. Mitchell and
A. ~Li. Marshall discussed the subject. G. I. Finch and D. L. Hodge, A. S. Ginsberg
and A. P. Ivanoff, G. M. Schwab, and C. R. Prichard and C. N. Hinshelwood
studied the effect of the presence of other metals. D. Tommasi, F. H. Pollard,
A. de Hemptinne, J. C. Stimson, G. I. Finch and J. C. Stimson, and Xi. Mond and
co-workers observed the absorption of a little carbon monoxide. The subject was
studied by I. Langmuir, A. J. F. de Silva, P. V. McKinney and E. F. Morfit,
B. S. Srikantan, and W. G. Palmer. I. L. Bell found that carbon monoxide is
not decomposed when it is heated with platinum ; G. Orloff noted the pyrogenetic
oxidation of carbon monoxide and hydrogen in contact with platinum. Li. Wohler