In_(2)O_(3)基催化剂在热催化二氧化碳加氢反应中的研究进展

Progress of In_(2)O_(3)-based catalysts in thermal catalytic CO_(2)hydrogenation reaction

CO_(2)催化加氢被认为是生产高附加值化学品和燃料最实用的途径之一。然而由于其化学惰性、C–C键偶联过程的高能垒和诸多的竞争反应,因此,开发高效的催化剂以促进CO_(2)的活化并转化为多样的化工产物显得至关重要。近年来,氧化铟因具有丰富的氧缺陷位点,在催化CO_(2)加氢方面对甲醇的高选择性以及对CO_(2)转化的高活性引起了人们的广泛关注。本工作主要对In_(2)O_(3)的结构及其与氧化物负载或金属元素掺杂的复合催化剂用于催化CO_(2)加氢制备甲醇的催化性能进行了综述。探讨了In_(2)O_(3)与不同类型的分子筛的接近度和元素迁移在CO_(2)加氢制烃类产物中的影响。并对In_(2)O_(3)基催化剂在CO_(2)选择性加氢方面存在的挑战和发展方向进行了总结。

Catalytic hydrogenation of CO_(2)is considered to be one of the most practical ways to produce value�added chemicals and fuels.However,due to the extreme chemical inertness,the high C–C coupling barrier and the many competing reactions,it is of vital important to develop the efficient catalysts for achieving the activation and transformation of CO_(2)into a variety of chemical products.In recent years,indium oxide has aroused great interest in CO_(2)hydrogenation due to its abundant oxygen vacancies,high selectivity of methanol and high activity of CO_(2)conversion.In this paper,the structure of In_(2)O_(3)and the catalytic performance of In_(2)O_(3)-supported or metal-doped composite catalysts for CO_(2)hydrogenation to methanol are reviewed.The effects of the proximity of In_(2)O_(3)to different zeolites and the migration of elements on the products of CO_(2)hydrogenation to hydrocarbons are also discussed.Finally,the challenges and development directions of selective hydrogenation of CO_(2)over In_(2)O_(3)-based catalysts are summarized.