John Chang, L. L. Lauderback, J. Falconer
Mar 1, 1990
Citations
0
Influential Citations
6
Citations
Journal
Journal of Catalysis
Abstract
Abstract Secondary ion mass spectrometry combined with isotopic labeling has been applied to study the interaction of potassium carbonate (K 2 C 18 O 3 ) with carbon black ( 13 C) at 300–1500 K. The SIMS analysis shows that K 2 CO 3 decomposes above 800 K to form K 2 O, which subsequently decomposes at 1070 K. A K 2 O surface species was identified by SIMS at all the temperatures studied. The presence of K 2 O before K 2 CO 3 thermally decomposes is attributed to the presence of H 2 O in the original sample, and a model is presented to explain K 2 O formation.