Insights into the Behaviors of the Catalytic Combustion of Propane over Spinel Catalysts
Insights into the Behaviors of the Catalytic Combustion of Propane over Spinel Catalysts
复制标题
DOI：
10.1007/s10562-020-03239-3
复制
发表时间：
2020-05-13
影响因子：
2.8
通讯作者：
Wang, Shudong
中科院分区：
文献类型：
--
作者：
Gao, Yang;Wang, Sheng;Wang, Shudong
考察了两种过渡金属（A和B均为过渡金属元素）和单一过渡金属（A为过渡金属元素）的尖晶石型AB（2）O（4）（共沉淀法制备的AB（2）O（4））催化剂对C3 H8的催化燃烧性能。结果表明，尖晶石型AFe（2）O（4）（A = Ni，Cu）的催化活性上级尖晶石型AAl（2）O（4）（A = Ni，Cu）。结合XRD、SEM、拉曼、XPS和H-2-TPR等分析，可以推断出高活性的催化剂是由丰富的表面氧空位和吸附氧物种所决定的。通过在AB（2）O（4）的B位上掺杂另一种过渡金属，氧活化得到了增强。结果，催化剂性能得到提高。在所制备的催化剂中，NiFe 2 O 4对C3 H8的燃烧具有比贵金属催化剂更优越的上级活性和水热稳定性。有望应用于VOCs的去除。图由于B位过渡金属的掺杂，可以调控尖晶石催化剂的表面氧活化行为，使AFe（2）O（4）具有比AAl（2）O（4）更高的丙烷催化活性。[图形]。
The behaviors of C3H8 catalytic combustion were investigated over spinel AB(2)O(4) (AB(2)O(4) prepared by co-precipitation method) with two transition metal (A and B are both transition metal elements) and single transition metal (A is transition metal element). Results showed that the spinel AFe(2)O(4) (A = Ni, Cu) owned superior catalytic activities than the spinel AAl(2)O(4) (A = Ni, Cu). In combination with XRD, SEM, Raman, XPS and H-2-TPR, it could be deduced that higher activity was dependent on abundant surface oxygen vacancy and adsorbed oxygen species. The oxygen activation was enhanced by the doping of another transition metal in B sites of AB(2)O(4). As a result, the catalytic performance was promoted. Among as-prepared catalysts, NiFe2O4 owned more superior activity and hydrothermal stability for C3H8 combustion than noble metal catalyst. It is expected to be applicable in the removal of VOCs. Graphic Due to the B-site transition metal doping, the surface oxygen activation behavior of the spinel catalyst can be modulated, which makes AFe(2)O(4) have a higher propane catalytic activity than AAl(2)O(4).[GRAPHICS].