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Tin is a chemical element with the symbol Sn (from Latin: stannum) and atomic number 50. Tin is a silvery white metal that characteristicly has a faint yellow hue due to slight oxidation. Tin, like indium, is soft enough to be cut without much force.
SN Medical abbreviations defined. What does SN stand for in Medical terms? Top SN abbreviation in Medical category: Sentinel Node
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Sn–Pt system strongly favors Pt–Sn bonds over Sn–Sn bonds and this always results in Sn atoms surrounded by Pt atoms. The lower cleavage energy of Sn compared to Pt provides a driving force for Sn to remain at the surface. Additionally, the larger atomic size of Sn compared to that of Pt causes strain in the Pthost lattice upon alloying.
Tin is the element with the greatest number of stable isotopes with a total of ten. Eighteen additional unstable isotopes are known. Hazards. The small amount of tin found in canned foods is quite harmless. The agreed limit of tin content in foods is 300 mg/kg.
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After Sn was doped with a Pt/Sn weight ratio of 60, the 3Pt catalyst was proved to be more efficient for the selective hydrogenation of CAL to COL with further improved CAL conversion although the COL selectivity was a little lower but still comparable.
previous works by our group, PtSnK/γAl 2O 3 and PtSn/MgAl 2O 4 catalysts were used to carry out PDH [17,18]. PtSnK/γAl 2O 3 showed higher coke formation than PtSn catalyst supported on MgAl 2O 4 spinel, probably because of the low acidity of the latter support. The presence of Pt provided high catalytic activity towards olefins.
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Dehydrogenation of isobutane over Sn/Pt/NaZSM5 catalysts for production of isobutene 371 Korean J. Chem. Eng.(Vol. 28, No. 2) ing the Brønsted acid sites and moderate/strong Lewis acid sites.
Example: H2 gas over Pt electrode H2(g) →2H+ + 2e(as oxidation) Notation: Pt(s) H2(g) H+ • Cell notation – The anode halfcell is written on the left of the cathode halfcell – The electrodes appear on the far left (anode) and far right (cathode) of the notation – Salt .
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