低碳烷烃脱氢制烯烃具有迫切的现实需求及可观的经济效益。目前，我国在该领域深度受制于美国，是典型的“卡脖子”工程。为突破国外限制并解决工业用脱氢催化剂存在的诸多缺陷，开发高活性、高稳定性的低毒非贵金属催化剂成为关键。本项目从催化剂结构设计出发，首先通过对合成的硫代钒酸盐前驱物进行后处理，一步在γ-Al2O3表面构建出低聚态纯三价钒物种和适宜的Vx+-O/S酸碱对，明晰钒物种价态、聚集态和酸碱对的调控机制；之后，考察脱氢催化剂中金属位钒物种与酸性位之间的协同效应；接着确立低聚态三价钒物种的优势特征及电子效应；最终为高效低碳烷烃脱氢催化剂的优化设计提供理论基础。本项目的创新性在于创制一种高活性的硫掺杂低聚纯三价钒脱氢催化剂的制备方法，实现对表面钒物种及适宜酸碱对的可控构建。

Nowadays, dehydrogenation (DH) of alkanes is drawing ever-increasing attention to meet the demand for light alkenes and to fulfil the high value-added utilization of light alkanes. However, the industrial DH process in China is seriously constrained by the USA. The key to solve this problem lies in preparation of non-noble catalyst with high-performance, good stability and low toxicity. In this project, the vanadium-based catalyst with pure oligomeric V3+ species will be prepared by treatment of thiovanadate. The V3+-O/S acid-base pair with ideal strength and stability is also fabricated simultaneously. The properties of vanadium species are then explored intensively, including polymerization degree, valence state, bonding modes and interaction with Al2O3. Subsequently, the synergy effect between metallic dehydrogenation sites and acid sites will also be elucidated. The superior characteristics and electronic effect of oligomeric V3+ species will be studied. Finally, this project will offer theoretical guidance for optimization of ideal dehydrogenation catalysts. The unique contribution of this project lies in preparation of high-efficiency vanadium-based catalyst with pure oligomeric V3+ species. Besides, the active vanadium species and ideal V3+-O/S acid-base pairs can be fabricated simultaneously via the treatment of thiovanadate.