We report on the effect of NiO-support interactions on the chemical nature of Ni species in a series of supported NiO catalysts for the ODH of ethane. SiO₂, TiO₂-anatase, a high surface area TiO₂ and a porous clay heterostructure (PCH) with TiO₂ and SiO₂ pillars were used as supports, which led to a selectivity to ethylene in the range 30–90% over supported NiO catalysts. The catalysts were characterized by means of XRD, N₂-Adsorption, H₂-TPR, XPS and in situ (under H₂ reductive atmosphere) and ex situ XAS spectroscopy. The catalytic performance of supported materials is discussed in terms of their reducibility and specific reduction kinetics, but also taking into account the specific chemical nature of Ni species on each catalyst. The influence of the particle size and the presence of Ni and O vacancies on the catalytic performance in the ODH of ethane is inferred.

我们报告了一系列支持NiO的乙烷ODH催化剂中NiO-载体相互作用对Ni物种化学性质的影响。SiO ₂，TiO ₂锐钛矿，高表面积TiO ₂以及带有TiO ₂和SiO ₂支柱的多孔粘土异质结构（PCH）被用作载体，导致对乙烯的选择性比载体高30％至90％ NiO催化剂。对催化剂进行X射线衍射的手段，其特征在于，N ₂ -Adsorption，H ₂ -TPR，XPS和原位（在H ₂还原气氛）和易地XAS光谱学。讨论了载体材料的催化性能，涉及还原性和特定的还原动力学，还考虑了每种催化剂上Ni物种的特定化学性质。推断出粒径和Ni和O空位的存在对乙烷在ODH中的催化性能的影响。