Lehrstuhl für Anorganische Chemie I, Universität Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany.
Abteilung für Heterogene Katalyse, Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim a.d. Ruhr, Germany.
Angew Chem Int Ed Engl. 2017 Nov 6;56(45):13968-13972. doi: 10.1002/anie.201610786. Epub 2017 Jan 3.
Oxidative thermal removal of the polymeric templates is not trivial for molybdenum oxides and hampers mesostructuring of this material. At ambient oxygen fugacity, Mo is the thermodynamically stable oxidation state and sublimation of MoO leads to a quick loss of the mesostructure through Oswald ripening. Taking advantage of the Boudouard equilibrium allows to fix the oxygen fugacity at a level where non-volatile MoO is stable while carbonaceous material may be oxidized by CO . Mesostructured MoO can be chemically converted into MoO or MoN under retention of the mesostructure.
氧化热去除聚合模板对于氧化钼来说并非易事，这阻碍了该材料的介孔结构形成。在环境氧逸度下，Mo 是热力学稳定的氧化态，而 MoO 的升华会导致介孔结构通过奥斯特瓦尔德熟化迅速损失。利用博杜安平衡可以将氧逸度固定在一个水平，在这个水平下，非挥发性 MoO 是稳定的，而含碳物质可以被 CO 氧化。介孔 MoO 可以在保留介孔结构的情况下通过化学反应转化为 MoO 或 MoN。
