Ru nanoparticles on TiO2 with various anatase-to-rutile ratios tuned by selective chemical dissolution: Effect of support polymorph composition on selective benzene hydrogenation
Ru nanoparticles on TiO2 with various anatase-to-rutile ratios tuned by selective chemical dissolution: Effect of support polymorph composition on selective benzene hydrogenation
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通过选择性化学溶解调整不同锐钛矿与金红石比率的 TiO2 上的 Ru 纳米粒子:载体多晶型物组合物对选择性苯加氢的影响
DOI:
10.1016/j.apcata.2019.02.021
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发表时间:
2019-04
期刊:
影响因子:
--
通讯作者:
Daiping He
中科院分区:
文献类型:
--
作者:
Gongbing Zhou;Lan Jiang;Daiping He
Using P25 TiO2as the precursor, phase-pure anatase and rutile TiO2as well as TiO2with tunable anatase-to-rutile molar ratios (nA/nR) were prepared via a facile “selective chemical dissolution” approach. The Ru/TiO2catalysts were then synthesized and comprehensively characterized by spectroscopic techniques and transmission electron microscopy. It is confirmed that these catalysts possessed similar physicochemical parameters and hydrophilicity, but different Ru sizes (2.3–4.5 nm). Ru nanoparticles (NPs) supported on TiO2withnA/nRof 2.66 (Ru/TiO2-1.5%HF) exhibited moderate size of 3.4 nm and electron-deficient state, which was originated from the unique Ru-on-anatase/rutile junction structure. In selective benzene hydrogenation, the turnover frequencies of benzene of the mixed phase TiO2-supported Ru catalysts were similar irrespective of thenA/nRratios and ranged between phase-pure anatase and rutile TiO2-supported Ru catalysts, which can be ascribed to the size effect of Ru. For the cyclohexene selectivity, Ru NPs supported on TiO2withnA/nRof 0.88–2.66 exhibited higherS0(92–95%) than Ru NPs on TiO2with othernA/nRratios, in which the Ru/TiO2-1.5%HF catalyst displayed a maximum of 95%. We demonstrated that in addition to the proper Ru size, the electron-deficiency of Ru on the Ru/TiO2-1.5%HF catalyst contributed greatly to the highest selectivity since it can promote the desorption of cyclohexene to avoid suffering over-hydrogenation.
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影响因子:
15.1
作者:
Mengxi Xu;Yunhai Wang;Jiafeng Geng;Dengwei Jing
通讯作者:
Dengwei Jing
影响因子:
--
作者:
K. Yamaguchi;T. Koike;J. Kim;Y. Ogasawara;N. Mizuno
通讯作者:
K. Yamaguchi;T. Koike;J. Kim;Y. Ogasawara;N. Mizuno
DOI:
--
发表时间:
1990
期刊:
--
影响因子:
--
作者:
G. Mallory;J. Hajdu
通讯作者:
G. Mallory;J. Hajdu
影响因子:
7.3
作者:
Gongbing Zhou;Yan Pei;Zheng Jiang;Kangnian Fan;Minghua Qiao;Bin Sun;Baoning Zong
通讯作者:
Baoning Zong
影响因子:
3.7
作者:
Su, Ren;Bechstein, Ralf;Besenbacher, Flemming
通讯作者:
Besenbacher, Flemming