SCHALENKATALYSATOREN, VERFAHREN ZU IHRER HERSTELLUNG UND IHRE VERWENDUNG

A shell catalyst (I) contains (A) one or more metals of Gp. VIII and/or IB on (B) a powder or formed support, these metals being in finely divided form within a shell ≤ 1200 (pref. not more than 100) nm thick, with crystallite sizes of ≤ 10 (pref. < 3) nm, in concns. of 0.05-35 wt.% w.r.t. dry wt...

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Bibliographische Detailangaben
Hauptverfasser:	PANSTER, PETER, FREUND, ANDREAS
Format:	Patent
Sprache:	ger
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM BASIC ELECTRIC ELEMENTS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY ELECTRICITY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A shell catalyst (I) contains (A) one or more metals of Gp. VIII and/or IB on (B) a powder or formed support, these metals being in finely divided form within a shell ≤ 1200 (pref. not more than 100) nm thick, with crystallite sizes of ≤ 10 (pref. < 3) nm, in concns. of 0.05-35 wt.% w.r.t. dry wt. of catalyst. Also claimed is (i) a process for the prodn. of (I) by coating the support with aq. solns. of ≥ 1 preformed, mono- or bi-metallic colloids of the above catalyst metals, stabilised with strongly hydrophilic surfactants; (ii) an electro-catalyst contg Gp. VIII metal(s) on a conductive support, obtd. by coating the support as above.