Promoting Role of Bismuth on Hydrotalcite-Supported Platinum Catalysts in Aqueous Phase Oxidation of Glycerol to Dihydroxyacetone

被引：25

作者：

Xue, Wenjie ^{[1
]}

Wang, Zenglong ^{[1
]}

Liang, Yu ^{[1
]}

Xu, Hong ^{[1
]}

Liu, Lei ^{[1
]}

Dong, Jinxiang ^{[1
,2
]}

机构：

[1] Taiyuan Univ Technol, Coll Chem & Chem Engn, Taiyuan 030024, Shanxi, Peoples R China

[2] Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Guangdong, Peoples R China

来源：

CATALYSTS | 2018年 / 8卷 / 01期

关键词：

Mg-Al hydrotalcite; platinum-bismuth nanoparticles; co-impregnation; glycerol oxidation; dihydroxyacetone; SELECTIVE OXIDATION; AEROBIC OXIDATION; BIMETALLIC CATALYSTS; BENZYL ALCOHOL; LACTIC-ACID; BASE; AU; CHEMICALS; OXYGEN; 1,3-PROPANEDIOL;

D O I：

10.3390/catal8010020

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：

Bismuth plays important roles in promoting the oxidation of alcohols towards high-value-added chemicals over a noble metal loading catalyst. Herein, Mg-Al hydrotalcite-supported platinum-bismuth nanoparticles (Pt-Bi/HT) were prepared by the co-impregnation method and used in the selective oxidation of glycerol towards dihydroxyacetone (DHA). The incorporation of Bi species into Pt/HT significantly enhances the conversion of glycerol and the selectivity of DHA. The high selectivity of DHA with 80.6% could be achieved at 25.1% conversion of glycerol. The Bi species of the Pt-Bi/HT catalyst mainly exist in the form of BiOCl and Bi metal, which is different from the previous Pt-Bi based catalyst, confirmed by a combination of powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron microscopy (HR-TEM). A plausible mechanism is proposed to elucidate the promoting role of Bi species on the Pt/HT catalyst in the selective oxidation of glycerol towards DHA.

引用

页数：12

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