A two-step treatment, oxidation in air followed by reduction in hydrogen, was carried out to modify the smooth Ni3Al foil surface into Ni particles supported on the oxide structure. The surface structure significantly changed depending on the oxidation temperature. A layer of granular NiO formed on the outer surface and inner oxide zone (IOZ) over Ni3Al foil surface after oxidation at 973 K. The IOZ was a mixture of Al and Ni oxides. In contrast, a large amount of faceted NiO particles formed on the outer surface after oxidation at 1173 K. Beneath the NiO particles, NiAl2O4 thin layer formed on IOZ over Ni3Al foil surface. And then, these NiO was selectively reduced to Ni after reduction treatment, constituting an oxide supported Ni particles structure. These results suggest that it is possible to modify the surface structure of Ni3Al foils simply by oxidation-reduction treatment.
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机译：进行两步处理，在空气中的氧化，然后进行氢气减少，以将光滑的Ni3Al箔表面改性为在氧化物结构上负载的Ni颗粒中。根据氧化温度显着改变表面结构。在973k的氧化后，在氧化下的外表面和内氧化物区（IOZ）上形成的粒状NIO层（IOZ）。IOZ是Al和Ni氧化物的混合物。相反，在1173k下氧化后在外表面上形成大量的刻面NiO颗粒。在NiO颗粒下方，Nial 2 O 4薄层在IOZ上形成在Ni3Al箔表面上。然后，在还原处理后，将这些NIO选择性地减少到Ni，构成氧化物负载的Ni颗粒结构。这些结果表明，通过氧化还原处理可以简单地改变Ni3Al箔的表面结构。
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