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

Guohao Wu; Bingbing Chen; Zhifeng Bai; Qi Zhao; Zhihui Wang; Chunshan Song; Xinwen Guo; Chuan Shi

doi:10.1016/j.catcom.2020.106203

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

Guohao Wu, Bingbing Chen, Zhifeng Bai, Qi Zhao, Zhihui Wang, Chunshan Song, Xinwen Guo, Chuan Shi

Leone Family Department of Energy and Mineral Engineering (EME)

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

A series of Co-based oxides were synthesized and investigated as passive NO_x adsorbers (PNAs). The morphology variation of Co₃O₄ oxide from nanoparticle to flake shape enhanced the NO_x storage efficiency (NSE) and improved the NO_x 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 Co₇Ni₃O_x-flake samples with moderate basicity could store NO_x as nitrite species, which facilitated NO_x desorption at lower temperatures.

Original language	English (US)
Article number	106203
Journal	Catalysis Communications
Volume	149
DOIs	https://doi.org/10.1016/j.catcom.2020.106203
State	Published - Jan 15 2021

All Science Journal Classification (ASJC) codes

Catalysis
General Chemistry
Process Chemistry and Technology

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title = "Cobalt oxide with flake-like morphology as efficient passive NOx adsorber",

abstract = "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.",

author = "Guohao Wu and Bingbing Chen and Zhifeng Bai and Qi Zhao and Zhihui Wang and Chunshan Song and Xinwen Guo and Chuan Shi",

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doi = "10.1016/j.catcom.2020.106203",

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T1 - Cobalt oxide with flake-like morphology as efficient passive NOx adsorber

AU - Wu, Guohao

AU - Chen, Bingbing

AU - Bai, Zhifeng

AU - Zhao, Qi

AU - Wang, Zhihui

AU - Song, Chunshan

AU - Guo, Xinwen

AU - Shi, Chuan

PY - 2021/1/15

Y1 - 2021/1/15

N2 - 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.

AB - 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.

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DO - 10.1016/j.catcom.2020.106203

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JO - Catalysis Communications

JF - Catalysis Communications

M1 - 106203

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

Abstract

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