Sum Frequency Generation Vibrational Spectroscopy and Kinetic Study of 2-Methylfuran and 2,5-Dimethylfuran Hydrogenation over 7 nm Platinum Cubic Nanoparticles

被引：32

作者：

Aliaga, Cesar ^{[1
,3
]}

Tsung, Chia-Kuang ^{[1
,3
]}

Alayoglu, Selim ^{[1
,3
]}

Komvopoulos, Kyriakos ^{[2
]}

Yang, Peidong ^{[1
,3
]}

Somorjai, Gabor A. ^{[1
,3
]}

机构：

[1] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 16期

关键词：

SINGLE-CRYSTAL SURFACES; WORK FUNCTION; ADSORPTION; FURAN; PYRROLE; PT(111); PT(100); ORIENTATION; BENZENE;

D O I：

10.1021/jp111343j

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：

Sum frequency generation vibrational spectroscopy and kinetic measurements obtained from gas chromatography were used to study the adsorption and hydrogenation of 2-methylfuran (MF) and 2,5-dimethylfuran (DMF) over cubic Pt nanopartides of 7 nm average size, synthesized by colloidal methods and cleaned by ultraviolet light and ozone treatment. Reactions carried out at atmospheric pressure in the temperature range of 20-120 degrees C produced dihydro and tetrahydro species, as well as ring-opening products (alcohols) and ring-cracking products, showing high selectivity toward ring opening throughout the entire temperature range. The aromatic rings (MT and DMF) adsorbed parallel to the nanoparticle surface. Results yield insight into various surface reaction intermediates and the reason for the significantly lower selectivity for ring cracking in DMF hydrogenation compared to MF hydrogenation.

引用

页码：8104 / 8109

页数：6

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