Cobalt oxide with flake-like morphology as efficient passive NOx adsorber

被引：13

作者：

Wu, Guohao ^{[1
]}

Chen, Bingbing ^{[1
]}

Bai, Zhifeng ^{[1
]}

Zhao, Qi ^{[1
]}

Wang, Zhihui ^{[1
]}

Song, Chunshan ^{[2
]}

Guo, Xinwen ^{[1
]}

Shi, Chuan ^{[1
]}

机构：

[1] Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China

[2] Penn State Univ, PSU DUT Joint Ctr Energy Res, EMS Energy Inst, Dept Energy & Mineral Engn & Chem Engn, University Pk, PA 16802 USA

来源：

CATALYSIS COMMUNICATIONS | 2021年 / 149卷

基金：

中国国家自然科学基金;

关键词：

Co-based oxides; Flake morphology; Passive NOx adsorber; NOx desorption;

D O I：

10.1016/j.catcom.2020.106203

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：

A series of Co-based oxides were synthesized and investigated as passive NOx adsorbers (PNAs). The morphology variation of Co3O4 oxide from nanoparticle to flake shape enhanced the NOx storage efficiency (NSE) and improved the NOx desorption capability. The enhanced NSE of the flake-like sample is related to its abundant surface oxygen species and large surface area. DRIFTS and CO2-TPD experimental results indicated that Co3O4-flake and Co7Ni3Ox-flake samples with moderate basicity could store NOx as nitrite species, which facilitated NOx desorption at lower temperatures.

引用

页数：6

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