Pt nanoparticles encapsulated on V2O5 nanosheets carriers as efficient catalysts for promoted aerobic oxidative desulfurization performance

doi:10.1016/S1872-2067(20)63685-3

Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (4): 557-562.DOI: 10.1016/S1872-2067(20)63685-3

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Pt nanoparticles encapsulated on V₂O₅ nanosheets carriers as efficient catalysts for promoted aerobic oxidative desulfurization performance

Chao Wang^a, Wei Jiang^b, Hanxiang Chen^a, Linhua Zhu^c, Jing Luo^b, Wenshu Yang^d, Guangying Chen^c, Zhigang Chen^a^,^*(), Wenshuai Zhu^b^,^#(), Huaming Li^b

^aInstitute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
^bInstitute for Energy Research, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China
^cCollege of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, Hainan, China
^dJingjiang College, Jiangsu University, Zhenjiang 212114, Jiangsu, China

Received:2020-03-03 Accepted:2020-05-21 Online:2021-04-18 Published:2021-01-22
Contact: Zhigang Chen,Wenshuai Zhu
About author:^#Tel/Fax: +86-511-88791800; E-mail: zhuws@ujs.edu.cn
^*Tel/Fax: +86-511-88979020; E-mail: chenzg01@126.com;
Supported by:
National Natural Science Foundation of China(21722604);National Natural Science Foundation of China(21766007);National Natural Science Foundation of China(21978119);Natural Science Foundation of Jiangsu Province(BK20190243);Qinglan Project of Jiangsu Province;Society Development Fund of Zhenjiang City(SH2019020)

Abstract

Abstract:

Platinum group metals (PGMs) usually exhibit promising aerobic catalytic abilities, providing a green and feasible oxidative desulfurization method. However, often, the PGM nanoparticles (NPs) get leached, and the catalysts are deactivated. In this work, Pt NPs with particle sizes of approximately 4-5 nm were encapsulated effectively and uniformly on the surface of vanadium pentoxide (V₂O₅) nanosheets (with thicknesses of approximately six atomic layers) through strong metal-support interactions. The synthesized catalysts promote catalytic aerobic oxidation reactions, realizing deep desulfurization (99.1%, < 5 μg g^-1) under atmospheric pressure and 110 °C reaction temperature. Remarkable degrees of sulfur removal could be achieved for oils with different initial S-concentrations and substrates. Additionally, the as-prepared catalysts could be recycled for reuse at least seven times.

Key words: Oxidative desulfurization, Aerobic oxidation, V₂O₅ nanosheets, Pt nanoparticles, Dibenzothiophene

Chao Wang, Wei Jiang, Hanxiang Chen, Linhua Zhu, Jing Luo, Wenshu Yang, Guangying Chen, Zhigang Chen, Wenshuai Zhu, Huaming Li. Pt nanoparticles encapsulated on V₂O₅ nanosheets carriers as efficient catalysts for promoted aerobic oxidative desulfurization performance[J]. Chinese Journal of Catalysis, 2021, 42(4): 557-562.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(20)63685-3

https://www.cjcatal.com/EN/Y2021/V42/I4/557

Figures/Tables 6

Fig. 1. TEM images of Pt NPs-1/V2O5 nanosheets (a), Pt NPs-2/V2O5 nanosheets (b), Pt NPs-3/V2O5 nanosheets (c); (d) HR-TEM image of Pt NPs-2/V2O5 nanosheets; (e-f) HR-TEM images of the marked regions in Fig. 1(d).

Fig. 2. (a) XPS spectrum of Pt NPs-2/V2O5 nanosheets; (b) V 2p core-level spectra of V2O5 nanosheets (A) and Pt NPs-2/V2O5 nanosheets (B); V 2p (c) and Pt 4f (d) core-level spectra of Pt NPs-2/V2O5 nanosheets.

Fig. 3. XRD patterns (a), and N2 adsorption-desorption curves (b) of catalysts.

Table 1 Sulfur removal with different reaction systems for 5 h.

Catalyst	Sulfur removal (%)
V₂O₅ nanosheets	54.1
Pt NPs-1/V₂O₅ nanosheets	79.5
Pt NPs-2/V₂O₅ nanosheets	99.1
Pt NPs-3/V₂O₅ nanosheets	99.2
Pt NPs-2/bulk V₂O₅	19.7

Fig. 4. Sulfur removal of oils with different S-concentrations (a) and different substrates (b).

Fig. 5. (a) recycling performance of the as-prepared catalyst; (b) FT-IR analysis of fresh and spent catalyst.

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Pt nanoparticles encapsulated on V₂O₅ nanosheets carriers as efficient catalysts for promoted aerobic oxidative desulfurization performance

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