Heteroatom Promoted Ni/Al(2)O(3)Catalysts for Highly Efficient Hydrogenation of 1,4-Butynediol to 1,4-Butenediol

摘要

abstract_textpA series of nickel-based catalysts were prepared by solution combustion synthesis (SCS), using Ce, Ag, Mo, Fe, or Co as a promoter, and applied for efficient and selective hydrogenation of 1,4-butynediol (BYD) to 1,4-butenediol (BED). It was found that each catalyst containing promoter had higher conversion of BYD and higher selectivity of BED than that of pristine Ni/Al(2)O(3)catalyst. Among as-prepared catalysts, Ni-Fe/Al(2)O(3)exhibited the highest activity and stability toward selective hydrogenation of BYD to BED. Results revealed that the improved catalytic performance of Ni-Fe/Al(2)O(3)over those of Ni/Al(2)O(3)could be ascribed to the varied metal-support interaction and active site dispersion, as well as the formation of Ni-Fe taenite. DFT calculations further demonstrated that the introduction of Fe regulated the adsorption strength of BYD and H on the surface of the catalyst, thus improving the catalytic hydrogenation activity of BYD./p/abstract_text