A novel method, that the precursor is burnt in argon without further reduction to directly prepare metallic catalyst, is developed using low-valued by-product. Rice husk not only contributed as catalyst support, but also as reductant and fuel. The XRD, TPR and TG-DTA analysis prove that Cu phase in the as-burnt catalyst is almost reduced to metallic Cu0. The as-prepared catalysts exhibit higher activity and methanol selectivity than those prepared by a conventional impregnation method. This method may open a new way to prepare metallic catalysts without further reduction, especially for some catalytic reactions promoted by K, Ca, Mg and Mn.
Shi, L., Zhu, P., Yang, R., Zhang, X., Yao, J., Chen, F., … Tsubaki, N. (2017). Functional rice husk as reductant and support to prepare as-burnt Cu-ZnO based catalysts applied in low-temperature methanol synthesis. Catalysis Communications, 89, 1–3. https://doi.org/10.1016/j.catcom.2016.10.011