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负载于铁基氧化物上的金纳米颗粒用于碳烟氧化：反应前后的物理化学性质

Au Nanoparticles Supported on Iron-Based Oxides for Soot Oxidation: Physicochemical Properties Before and After the Reaction.

作者信息

Hu Chao, Chen Zhenzhen, Wei Chao, Wan Xiaokang, Li Wenzhi, Lin Qizhao

机构信息

Advanced Technology Research Institute of Green Building of Anhui Province, Anhui Jianzhu University, Hefei 230601, People's Republic of China.

Key Laboratory of Indoor Thermal and Humid Environment, Anhui Jianzhu University, Hefei 230601, People's Republic of China.

出版信息

ACS Omega. 2021 Apr 26;6(17):11510-11518. doi: 10.1021/acsomega.1c00619. eCollection 2021 May 4.

DOI:10.1021/acsomega.1c00619
PMID:34056306
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8154002/
Abstract

The catalytic performance of Au nanoparticles (NPs) supported on different transition-metal oxides for soot oxidation was studied in this paper. The changes in the morphology, phase structure, and physicochemical properties of Au-supported iron-based oxides before and after the reaction with soot particles were observed by high-resolution transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and temperature-programed reduction. It was found that the catalytic activity of FeO, FeO, CoO, and NiO for soot oxidation was significantly improved after loading Au NPs. Especially, under the action of Au/FeO and Au/FeO, the oxidation of soot was close to 20% below 420 °C, and their values were 73 and 50 °C, respectively. When Au/FeO and Au/FeO reacted with soot, the size of the catalysts increased, and the active oxygen and Fe 2p components decreased. Au promoted the reduction of iron ions to a lower temperature, which was beneficial to improving the oxidation performance of iron-based oxides.

摘要

本文研究了负载在不同过渡金属氧化物上的金纳米颗粒（NPs）对碳烟氧化的催化性能。通过高分辨率透射电子显微镜、X射线衍射、X射线光电子能谱和程序升温还原等手段，观察了负载金的铁基氧化物与碳烟颗粒反应前后的形貌、相结构和物理化学性质的变化。研究发现，负载金纳米颗粒后，FeO、FeO、CoO和NiO对碳烟氧化的催化活性显著提高。特别是，在Au/FeO和Au/FeO的作用下，420℃以下碳烟的氧化率接近20%，其T90值分别为73℃和50℃。当Au/FeO和Au/FeO与碳烟反应时，催化剂的尺寸增大，活性氧和Fe 2p组分减少。金促进了铁离子在较低温度下的还原，有利于提高铁基氧化物的氧化性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db2/8154002/079d72633142/ao1c00619_0011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db2/8154002/817ab60c15da/ao1c00619_0010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db2/8154002/079d72633142/ao1c00619_0011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db2/8154002/7a143f1231ed/ao1c00619_0002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db2/8154002/293f1c6dcf99/ao1c00619_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db2/8154002/6b3fd46becd1/ao1c00619_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db2/8154002/44c00dfe1ca0/ao1c00619_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db2/8154002/7ff200e4c064/ao1c00619_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db2/8154002/a697532da372/ao1c00619_0008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9db2/8154002/079d72633142/ao1c00619_0011.jpg

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本文引用的文献

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