The promoting effect of cesium on structure and morphology of silver catalysts
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| Format: | Artículo científico |
| Sprache: | en |
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Academia Brasileira de Ciências
2004
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| _version_ | 1876457752229838848 |
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| author | Martin Schmal |
| author_facet | Martin Schmal |
| contents | The promoting effect of cesium on structure and morphology of silver catalysts Martin Schmal Marta C.N.A. Carvalho Carlos A. Perez Fabio B. Passos Renata A. Simão Multidisciplinaria (Ciencias Naturales y Exactas) AFM XPS silver cesium catalyst Silver supported catalysts on alpha-alumina were prepared and characterized by Brunauer-Emmet-Teller equations, scanning electronic microscopy, X-ray diffraction and atomic force microscopy techniques. Results show that these are powerful techniques for the determination of texture, morphology and surface properties. It has been shown that the addition of Cs in the Ag/Al2O3 catalyst increased the dispersion of silver with the formation of small silver particles over a thin silver film already formed over the alumina support. It is important to stress that atomic force microscopy measurements are significant to observe the film and the dispersion of Ag and, on the contrary, X-ray photoelectronic spectroscopy did not, however, it allows to the conclusion that undistinguishable silver, either as metallic or oxidation state, are present at the surface. X-ray diffraction results confirm predominantly metallic silver. 2004 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32776103 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.76 |
| format | Artículo científico |
| id | redalyc_32776103 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | The promoting effect of cesium on structure and morphology of silver catalysts Martin Schmal Multidisciplinaria (Ciencias Naturales y Exactas) AFM XPS silver cesium catalyst The promoting effect of cesium on structure and morphology of silver catalysts Martin Schmal Marta C.N.A. Carvalho Carlos A. Perez Fabio B. Passos Renata A. Simão Multidisciplinaria (Ciencias Naturales y Exactas) AFM XPS silver cesium catalyst Silver supported catalysts on alpha-alumina were prepared and characterized by Brunauer-Emmet-Teller equations, scanning electronic microscopy, X-ray diffraction and atomic force microscopy techniques. Results show that these are powerful techniques for the determination of texture, morphology and surface properties. It has been shown that the addition of Cs in the Ag/Al2O3 catalyst increased the dispersion of silver with the formation of small silver particles over a thin silver film already formed over the alumina support. It is important to stress that atomic force microscopy measurements are significant to observe the film and the dispersion of Ag and, on the contrary, X-ray photoelectronic spectroscopy did not, however, it allows to the conclusion that undistinguishable silver, either as metallic or oxidation state, are present at the surface. X-ray diffraction results confirm predominantly metallic silver. 2004 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32776103 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.76 |
| title | The promoting effect of cesium on structure and morphology of silver catalysts |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) AFM XPS silver cesium catalyst |
| url | https://www.redalyc.org/articulo.oa?id=32776103 |