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Catalyst particles comprising a layered core-shell-shell structure and method of their manufacture
Catalyst particles comprising a layered core-shell-shell structure and method of their manufacture
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机译:包含层状核-壳-壳结构的催化剂颗粒及其制造方法
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摘要
The present invention is directed to catalyst particles comprising a layered core-shell-shell structure and to a method of their manufacture. The catalyst particles have the general formula BM/IL/PM in which BM is a base metal core (selected from Co, Ni or Cu), PM is a precious metal outer shell (selected from Pt, Ir or Pd) and IL is an intermediate layer comprising a base metal/precious metal alloy with a concentration gradient of base metal to the outside PM layer. The particles of the present invention comprise a core-shell-shell structure and a substantially continuous precious metal shell layer. They find use in various catalytic applications, for example in gas-phase catalysis, in electrocatalysts for fuel cells, in catalytic converters for automobiles and in electronic or medical applications.
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机译:本发明涉及包含层状核-壳-壳结构的催化剂颗粒及其制备方法。催化剂颗粒的通式为BM / IL / PM,其中BM是贱金属核(选自Co,Ni或Cu),PM是贵金属外壳(选自Pt,Ir或Pd),IL是中间层包括贱金属/贵金属合金,该贱金属/贵金属合金具有贱金属到外部PM层的浓度梯度。本发明的颗粒包括核-壳-壳结构和基本上连续的贵金属壳层。它们可用于各种催化应用,例如气相催化,燃料电池的电催化剂,汽车的催化转化器以及电子或医疗应用。
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