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Revealing the role of tellurium in palladium-tellurium catalysts for the direct synthesis of hydrogen peroxide
Tian, PF; Xuan, FZ; Ding, DD; Sun, Y; Xu, XY; Li, W; Si, R; Xu, J; Han, YF
2020
Source PublicationJOURNAL OF CATALYSIS
ISSN0021-9517
Volume385Pages:21-29
Subtype期刊论文
AbstractThe direct synthesis of H2O2 from H-2 and O-2 is an atom-efficient alternative to the anthraquinone autooxidation process. Herein, we report high-performance alumina supported palladium-tellurium bimetallic catalysts (Pd-Te/Al2O3) for the direct H2O2 synthesis using a semi-continuous process at 283 K and 0.1 MPa. By modifying the Pd catalyst with Te, the H2O2 productivity was markedly increased from 2017 to 2824 mmol h(-l)g(pd)(1). The role of Te in H(2)O(2 )synthesis was thoroughly studied by multiple techniques including in situ spectroscopies and density functional theory (DFT) calculations. The Pd monometallic sites, especially the high-energy step sites, have demonstrated to be highly active for the dissociation of O-2 and the subsequent formation of byproduct H2O. By blocking the high-energy step sites and forming Pd-Te bimetallic sites, Te plays a critical role in suppressing the side reactions and promoting H(2)O(2 )synthesis. This work provides inspiration for the rational design of bimetallic catalysts for H2O2 synthesis. (C) 2020 Elsevier Inc. All rights reserved.
KeywordNEAR-ATMOSPHERIC PRESSURES TOTAL-ENERGY CALCULATIONS FINDING SADDLE-POINTS DIRECT H2O2 SYNTHESIS AT-PD SURFACES ULTRAHIGH-VACUUM ACTIVE-SITES CO OXIDATION H-2 O-2
DOI10.1016/j.jcat.2020.02.016
Indexed BySCI ; EI
Language英语
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Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/33112
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China
2.East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
4.Zhengzhou Univ, Engn Res Ctr Adv Funct Mat Mfg, Minist Educ, Zhengzhou 450001, Peoples R China
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GB/T 7714
Tian, PF,Xuan, FZ,Ding, DD,et al. Revealing the role of tellurium in palladium-tellurium catalysts for the direct synthesis of hydrogen peroxide[J]. JOURNAL OF CATALYSIS,2020,385:21-29.
APA Tian, PF.,Xuan, FZ.,Ding, DD.,Sun, Y.,Xu, XY.,...&Han, YF.(2020).Revealing the role of tellurium in palladium-tellurium catalysts for the direct synthesis of hydrogen peroxide.JOURNAL OF CATALYSIS,385,21-29.
MLA Tian, PF,et al."Revealing the role of tellurium in palladium-tellurium catalysts for the direct synthesis of hydrogen peroxide".JOURNAL OF CATALYSIS 385(2020):21-29.
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