Tianjin Key Laboratory of Water Environment and Resources, Tianjin Normal University, Tianjin, 300387, PR China.
Dalton Trans. 2011 Feb 7;40(5):1098-104. doi: 10.1039/c0dt01263g. Epub 2010 Dec 14.
An efficient method for preparation of Mo(2)C catalyst is described, where Mo(2)C is obtained by the heat treatment of a single solid precursor containing (NH(4))(6)Mo(7)O(24) and hexamethylenetetramine (HMT) at 923 K in H(2) flow without conventional prolonged carbonization. The catalysts are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), BET surface area measurement, and transmission electron microscopy (TEM). Furthermore, these catalysts are evaluated in the dibenzothiophene (DBT) hydrodesulfurization (HDS) reaction, and proved to be superior to those prepared by a temperature-programmed reduction (TPRe) method. The better catalytic performance is ascribed to higher dispersion of Mo(2)C on the support and a lower surface polymeric carbon content. This hydrogen thermal treatment (HTT) method provided a new strategy for the preparation of a highly active molybdenum carbide catalyst.
一种高效制备 Mo(2)C 催化剂的方法被描述，其中 Mo(2)C 通过在 H(2)流中于 923 K 下热处理含有 (NH(4))(6)Mo(7)O(24)和六亚甲基四胺 (HMT) 的单一固体前体而获得，无需传统的长时间碳化。催化剂通过 X 射线衍射 (XRD)、X 射线光电子能谱 (XPS)、BET 比表面积测量和透射电子显微镜 (TEM) 进行了表征。此外，这些催化剂在二苯并噻吩 (DBT) 加氢脱硫 (HDS) 反应中进行了评估，结果表明它们优于通过程序升温还原 (TPRe) 方法制备的催化剂。更好的催化性能归因于载体上 Mo(2)C 的更高分散度和更低的表面聚合碳含量。这种氢热处理 (HTT) 方法为制备高活性碳化钼催化剂提供了一种新策略。
