燃料化学学报2017，Vol.45Issue(6)：714-722,9.
利用原子层沉积制备Pt/HZSM-5催化剂用于乙酰丙酸水相加氢制备戊酸
Pt/HZSM-5 catalyst synthesized by atomic layer deposition for aqueous-phase hydrogenation of levulinic acid to valeric acid
摘要
Abstract
A Pt/HZSM-5 catalyst was prepared by atomic layer deposition (ALD) for aqueous-phase hydrogenation of levulinic acid (LA) to valeric acid (VA).5Pt/HZSM-5 produced with 5 cycles of Pt ALD was identified as a highly active and stable bifunctional catalyst, and a high yield of VA (91.4%) was achieved in aqueous solution.A close interaction between Pt and acid sites of HZSM-5 is favor for the selective generation of VA.The microporous structure and the acid sites of HZSM-5 were not changed after Pt ALD, and some Pt nanoparticles were located in the micropore channel of HZSM-5.This reveals that the Pt ALD has the advantage to protect the structure of zeolite.The average particle size of Pt nanoparticles, electric state of surface Pt, and surface acid sites are nearly not changed with the increase of Pt ALD cycle number.However, the ratio of Pt in the pore channel to that out of the pore decreases with the increase of ALD cycle numbers, resulting in a decrease of TOF of VA yield.For comparison, Pt nanoparticles supported on HZSM-5 were also produced by impregnation.But the pore structure of HZSM-5 was damaged, and more micropore were formed by impregnation method for Pt loading.Moreover, it exhibited very low catalytic activity, selectivity of VA, and stability.关键词
Pt/ZSM-5/原子层沉积/乙酰丙酸/加氢/戊酸Key words
Pt/atomic layer deposition/levulinic acid/hydrogentation/valeric acid分类
化学化工引用本文复制引用
谷晓敏,张斌,梁浩杰,葛会宾,杨慧敏,覃勇..利用原子层沉积制备Pt/HZSM-5催化剂用于乙酰丙酸水相加氢制备戊酸[J].燃料化学学报,2017,45(6):714-722,9.基金项目
The project was supported by the National Natural Science Foundation of China (21403271, 21673269), the Natural Science Foundation of Shanxi Province (2015021046) and Youth Innovation Promotion Association CAS, the Hundred Talents Program of the Chinese Academy of Sciences （21403271, 21673269）
国家自然科学基金(21403271, 21673269), 山西省自然科学基金(2015021046)和中国科学院青年创新促进会, 中国科学院百人计划项目资助 （21403271, 21673269）
