期刊
APPLIED CATALYSIS A-GENERAL
卷 591, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcata.2019.117404
关键词
CoAl2O4 spinel; Diesel soot oxidation; NOx; Mechanism; Pt-free
资金
- FEDER funds [BES-2014-069779]
- MINECO - European Social Fund [RyC-2015-18626]
- 2018 Leonardo Grant for Researchers and Cultural Creators (BBVA Foundation)
- [NANOMINDCSIC201560E068]
- [MAT2017-86450-C4-1-R]
Cobalt aluminate spinel compounds prepared by different methods were characterized in terms of crystalline structure, morphology, textural properties and acidity, and evaluated as catalysts for diesel soot combustion in NOx/O-2 mixtures. The activation of commercial CoAl2O4 microparticles by ball milling reduced the onset temperature of this material considerably and yielded an efficient catalyst for soot combustion that exhibited a temperature of half conversion, 411 degrees C, similar to that obtained with the reference Pt/Al2O3 catalyst. Moreover, like Pt, the milled CoAl2O4 suppressed the CO formation observed in non-catalytic soot combustion. The significant modification of the particle size, the emergence of new exposed crystal facets and the creation of defects are responsible for the appearance of new active sites and high acidity that improved catalyst-to -soot contact and reactivity. The findings open a new gate toward the use of efficient Pt-free catalyst for soot combustion.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据