Impact of ferrocene on the structure of diesel exhaust soot as probed with wide-angle X-ray scattering and C(1s) NEXAFS spectroscopy

被引：39

作者：

Braun, Artur

Huggins, Frank E.

Kelly, Kerry E.

Mun, Bongjin S.

Ehrlich, Steven N.

Huffman, Gerald P.

机构：

[1] EMPA, Swiss Fed Labs Mat Testing & Res, CH-8600 Dubendorf, Switzerland

[2] Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA

[3] Univ Kentucky, Consortium Fossil Fuel Sci, Lexington, KY 40506 USA

[4] Univ Utah, Dept Chem & Fuels Engn, Salt Lake City, UT 84112 USA

[5] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[6] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA

来源：

CARBON | 2006年 / 44卷 / 14期

基金：

美国国家科学基金会;

关键词：

non-graphitic carbon; soot; catalyst; X-ray scattering; microstructure;

D O I：

10.1016/j.carbon.2006.05.051

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：

We report on the structure of a set of diesel exhaust samples that were obtained from reference diesel fuel and diesel fuel mixed with ferrocene. Characterization was carried out with X-ray absorption spectroscopy (C(1s) NEXAFS) and wide-angle X-ray scattering (WAXS). The reference diesel soot shows a pronounced graphite-like microstructure and molecular structure, with a strong (002) graphite Bragg reflex and a strong aromatic C=C resonance at 285 eV. The mineral matter in the reference soot could be identified as Fe2O3 hematite. The soot specimen from the diesel mixed with ferrocene has an entirely different structure and lacks significantly in graphite-like characteristics. NEXAFS spectra of such soot barely show aromatics but pronounced contributions from aliphatic structures. WAXS patterns show almost no intensity at the Bragg (002) reflection of graphite, but a strong aliphatic gamma-side band. The iron from the ferrocene transforms to Fe2O3 maghemite. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：2904 / 2911

页数：8

共 37 条

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