Acetone to isobutene conversion on ZnxTiyOz: Effects of TiO2 facet

被引：6
作者：
Li, Houqian [1 ]
Hurlock, Matthew J. [2 ]
Sudduth, Berlin [1 ]
Li, Junrui [1 ]
Sun, Junming [1 ]
Zhang, Qiang [2 ]
Wang, Yong [1 ,3 ]
机构：
[1] Washington State Univ, Gene & Linda Voiland Sch Chem Engn & Bioengn, Pullman, WA 99164 USA
[2] Washington State Univ, Dept Chem, Pullman, WA 99163 USA
[3] Pacific Northwest Natl Lab, Inst Integrated Catalysis, Richland, WA 99352 USA
来源：
JOURNAL OF CATALYSIS | 2022年 / 410卷
关键词：
Acetone; TiO2; ZnxTiyOz; Facet; DRIFTS; Mechanism; ZNXZRYOZ MIXED OXIDES; ACID-BASE PAIRS; OXIDATIVE DEHYDROGENATION; SELECTIVE CONVERSION; METHANOL CONVERSION; ALDOL CONDENSATION; RAMAN-SPECTRUM; BIO-ETHANOL; ANATASE; CATALYSTS;
D O I：
10.1016/j.jcat.2022.03.031
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Liquid-phase chemical grafting method was used to graft Zn onto TiO2 with preferentially exposed (101) or (001) facet. The obtained ZnxTiyOz materials were characterized using various techniques (e.g., XRD, Raman, DRIFTS etc.) and evaluated for the acetone-to-isobutene reaction. It was found that over TiO2 (001), both terminal and bridging hydroxyls were readily titrated by Zn deposition, whereas a substantial amount of bridging hydroxyls on TiO2 (101) remained. Although dominant Zn-O-terminated surface was obtained on two Zn-2 samples, bridging hydroxyls with high H-D exchange reactivity were observed on Zn-2 (101) compared with Zn-2 (001). The bridging hydroxyls showing rapid proton transfer efficiently stabilizes a transition state of diacetone alcohol intramolecular rearrangement for isobutene production as opposed to the diacetone alcohol dehydration.(c) 2022 Elsevier Inc. All rights reserved.
引用
收藏
页码：236 / 245
页数：10
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