Lewis base sites of non-oxide supports boost oxygen absorption and activation over supported Pt catalysts

Jianye Liu; Wenbin Chen; Taihe He; Yiwen Fang; ZiYi Zhong; Xiaoming Wang; Zhen Li; Yibing Song

doi:10.1039/d2ra00538g

Lewis base sites of non-oxide supports boost oxygen absorption and activation over supported Pt catalysts

Jianye Liu, Wenbin Chen, Taihe He, Yiwen Fang, ZiYi Zhong, Xiaoming Wang, Zhen Li^*, Yibing Song^*

^*Corresponding author for this work

Chemical Engineering

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

2 Scopus citations

Abstract

Formaldehyde (HCHO) oxidation to improve indoor air quality has attracted extensive attention. Designing efficient catalysts for HCHO removal at room temperature still remains challenging. Herein, we report a novel strategy to boost HCHO oxidation by the synergistic effect of Pt nanoparticles and C3N4. The pyridine nitrogen of C3N4 can create Lewis base sites, which function in adsorbing and activating O2 molecules. As the preparation temperature increased, the pyridine nitrogen content increased on the C3N4 surface, leading to a more significant synergistic effect. The mechanism study by in situ DRIFTS indicated that the adsorbed O2 molecules were activated by Pt/C3N4. As a result, the Pt/C3N4-650 has the most outstanding performance for HCHO oxidation at room temperature. HCHO can be completely eliminated with a concentration of 80 ppm at room temperature at a GHSV of 50 000 ml g−1 h−1. This study will provide a new perspective to design efficient HCHO oxidation catalysts.

Original language	English
Journal	RSC Advances
DOIs	https://doi.org/10.1039/d2ra00538g
State	Published - 26 Apr 2022

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title = "Lewis base sites of non-oxide supports boost oxygen absorption and activation over supported Pt catalysts",

abstract = "Formaldehyde (HCHO) oxidation to improve indoor air quality has attracted extensive attention. Designing efficient catalysts for HCHO removal at room temperature still remains challenging. Herein, we report a novel strategy to boost HCHO oxidation by the synergistic effect of Pt nanoparticles and C3N4. The pyridine nitrogen of C3N4 can create Lewis base sites, which function in adsorbing and activating O2 molecules. As the preparation temperature increased, the pyridine nitrogen content increased on the C3N4 surface, leading to a more significant synergistic effect. The mechanism study by in situ DRIFTS indicated that the adsorbed O2 molecules were activated by Pt/C3N4. As a result, the Pt/C3N4-650 has the most outstanding performance for HCHO oxidation at room temperature. HCHO can be completely eliminated with a concentration of 80 ppm at room temperature at a GHSV of 50 000 ml g−1 h−1. This study will provide a new perspective to design efficient HCHO oxidation catalysts.",

author = "Jianye Liu and Wenbin Chen and Taihe He and Yiwen Fang and ZiYi Zhong and Xiaoming Wang and Zhen Li and Yibing Song",

year = "2022",

month = apr,

day = "26",

doi = "10.1039/d2ra00538g",

language = "英语",

journal = "RSC Advances",

issn = "2046-2069",

publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Lewis base sites of non-oxide supports boost oxygen absorption and activation over supported Pt catalysts

AU - Liu, Jianye

AU - Chen, Wenbin

AU - He, Taihe

AU - Fang, Yiwen

AU - Zhong, ZiYi

AU - Wang, Xiaoming

AU - Li, Zhen

AU - Song, Yibing

PY - 2022/4/26

Y1 - 2022/4/26

N2 - Formaldehyde (HCHO) oxidation to improve indoor air quality has attracted extensive attention. Designing efficient catalysts for HCHO removal at room temperature still remains challenging. Herein, we report a novel strategy to boost HCHO oxidation by the synergistic effect of Pt nanoparticles and C3N4. The pyridine nitrogen of C3N4 can create Lewis base sites, which function in adsorbing and activating O2 molecules. As the preparation temperature increased, the pyridine nitrogen content increased on the C3N4 surface, leading to a more significant synergistic effect. The mechanism study by in situ DRIFTS indicated that the adsorbed O2 molecules were activated by Pt/C3N4. As a result, the Pt/C3N4-650 has the most outstanding performance for HCHO oxidation at room temperature. HCHO can be completely eliminated with a concentration of 80 ppm at room temperature at a GHSV of 50 000 ml g−1 h−1. This study will provide a new perspective to design efficient HCHO oxidation catalysts.

AB - Formaldehyde (HCHO) oxidation to improve indoor air quality has attracted extensive attention. Designing efficient catalysts for HCHO removal at room temperature still remains challenging. Herein, we report a novel strategy to boost HCHO oxidation by the synergistic effect of Pt nanoparticles and C3N4. The pyridine nitrogen of C3N4 can create Lewis base sites, which function in adsorbing and activating O2 molecules. As the preparation temperature increased, the pyridine nitrogen content increased on the C3N4 surface, leading to a more significant synergistic effect. The mechanism study by in situ DRIFTS indicated that the adsorbed O2 molecules were activated by Pt/C3N4. As a result, the Pt/C3N4-650 has the most outstanding performance for HCHO oxidation at room temperature. HCHO can be completely eliminated with a concentration of 80 ppm at room temperature at a GHSV of 50 000 ml g−1 h−1. This study will provide a new perspective to design efficient HCHO oxidation catalysts.

U2 - 10.1039/d2ra00538g

DO - 10.1039/d2ra00538g

M3 - 文章

SN - 2046-2069

JO - RSC Advances

JF - RSC Advances

ER -

Lewis base sites of non-oxide supports boost oxygen absorption and activation over supported Pt catalysts

Abstract

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