A SIMS (secondary ion mass spectrometry) study of IrO2/RuO2/TiO2 mixed oxide films and PbO2 films synthesized by thermal and electrochem. processes, resp., reveals interesting cluster ions that may be very important in evaluating component reactivity between different metal oxides and with trapped ions or neutral particles present in the different matrixes. The ion yields of clusters are also strongly affected by the presence of minor components, and the examples reported in this paper confirm that mass spectra and ion profiles can give a better characterization of the surface region and help in understanding modifications that affect some catalytic or electrocatalytic aspects. The various oxidn. states of metals contained in the ion species, and the formation of oxides or fragmentations, give unequivocal and important responses to problems of applied research on inorg. materials. The present paper presents evidence that a large amt. of data can be obtained by SIMS and further studies are in progress to probe fundamental aspects and possible relations between surface mass spectra and surface chem.
SIMS methods in reactivity studies on metal oxides
DE BATTISTI, Achille
1995
Abstract
A SIMS (secondary ion mass spectrometry) study of IrO2/RuO2/TiO2 mixed oxide films and PbO2 films synthesized by thermal and electrochem. processes, resp., reveals interesting cluster ions that may be very important in evaluating component reactivity between different metal oxides and with trapped ions or neutral particles present in the different matrixes. The ion yields of clusters are also strongly affected by the presence of minor components, and the examples reported in this paper confirm that mass spectra and ion profiles can give a better characterization of the surface region and help in understanding modifications that affect some catalytic or electrocatalytic aspects. The various oxidn. states of metals contained in the ion species, and the formation of oxides or fragmentations, give unequivocal and important responses to problems of applied research on inorg. materials. The present paper presents evidence that a large amt. of data can be obtained by SIMS and further studies are in progress to probe fundamental aspects and possible relations between surface mass spectra and surface chem.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
