Effect of Zn addition on the direct synthesis of hydrogen peroxide over supported palladium catalysts

Wang, Suli; Gao, Kaige; Li, Wei; Zhang, Jinli

doi:10.1016/j.apcata.2016.10.023

Cited by 67 publications

(54 citation statements)

References 65 publications

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“…In addition, the addition of zinc was found to improve the catalytic performance of palladium catalysts supported on alumina [83] and, more recently, in a Zn-CNTs-O 2 system [84] and on silica [85]. The promotional effect of Zn was attributed to both particle geometric changes and to an electronic interaction between Pd and Zn.…”

Section: Strukul and Coworkersmentioning

confidence: 96%

Looking for the “Dream Catalyst” for Hydrogen Peroxide Production from Hydrogen and Oxygen

et al. 2019

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The reaction between hydrogen and oxygen is in principle the simplest method to form hydrogen peroxide, but it is still a “dream process”, thus needing a “dream catalyst”. The aim of this review is to analyze critically the different heterogeneous catalysts used for the direct synthesis of H2O2 trying to determine the features that the ideal or “dream catalyst” should possess. This analysis will refer specifically to the following points: (i) the choice of the metal; (ii) the metal promoters used to improve the activity and/or the selectivity; (iii) the role of different supports and their acidic properties; (iv) the addition of halide promoters to inhibit undesired side reactions; (v) the addition of other promoters; (vi) the effects of particle morphology; and (vii) the effects of different synthetic methods on catalyst morphology and performance.

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Section: Strukul and Coworkersmentioning

confidence: 96%

Looking for the “Dream Catalyst” for Hydrogen Peroxide Production from Hydrogen and Oxygen

et al. 2019

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“…Further studies have investigated the beneficial role of Zn, Ag, Te, Sb and Ni as secondary metals that are able to enhance catalytic selectivity through enhanced stabilization of O 2 − , as a result of a reduction in the amount of contiguous Pd ensemble sites and an enhancement in the number of isolated Pd sites favourable for H 2 O 2 formation. Table highlights the enhancement in catalytic selectivity towards H 2 O 2 that can be achieved through modification of Pd by secondary non‐precious metals.…”

Section: The Role Of Secondary Metals In the Direct Synthesis Of H2o2mentioning

confidence: 99%

Recent Advances in the Direct Synthesis of H₂O₂

2018

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Hydrogen peroxide (H2O2) is a highly effective, green oxidant that has found application in sectors ranging from the synthesis of fine chemicals and waste stream treatment to the extraction of precious metals and the bleaching of paper pulp and textiles. The growing demand for H2O2 has seen it become one of the 100 most important chemicals in the world. The direct synthesis of H2O2 from H2 and O2 has been a challenge for the scientific community for over 100 years and represents an attractive alternative to the current means of production. Herein we discuss the historical perspective of the direct synthesis process, the recent literature regarding catalyst design and the role of additives as well as the application of H2O2 as an in situ oxidant. We discuss the key problems that remain and conclude that although there has been progress with respect to the selectivity of hydrogen utilisation, there is a need to now concentrate on catalyst activity as the key remaining problem requiring a solution is the concentration of H2O2 that can be achieved, especially in flow reactors.

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“…To confirm how the structure affects the catalytic activity and selectivity, in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) of CO adsorption was performed (Figure b). For Pd NPs, the bands at 2083, 1986, and 1942 cm −1 were observed, which is assigned to the linearly bonded CO species, the bridged CO species and the bridged CO species on Pd atoms, respectively . For the Pd–Sn catalysts, all peaks are shifted to the lower wavenumbers, which indicates the charge transfer from Sn to Pd.…”

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confidence: 95%

Promoting the Direct H₂O₂ Generation Catalysis by Using Hollow Pd–Sn Intermetallic Nanoparticles

Zhang

Shao

Zhang

et al. 2018

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Although direct hydrogen (H ) oxidation to hydrogen peroxide (H O ) is considered as a promising strategy for direct H O synthesis, the desirable conversion efficiency remains formidable challenge. Herein, highly active and selective direct H oxidation to H O is achieved by using hollow Pd-Sn intermetallic nanoparticles (NPs) as the catalysts. By tuning the catalytic solvents and catalyst supports, the efficiency of direct H oxidation to H O can be optimized well with the hollow Pd Sn NPs/P25 exhibiting H O selectivity up to 80.7% and productivity of 60.8 mol kg h . In situ diffuse reflectance infrared Fourier transform spectroscopy of CO adsorption results confirm the different surface atom arrangements between solid and hollow Pd-Sn NPs. X-ray photoelectron spectra results show that the higher efficiency of Pd Sn NPs/P25 is due to its higher content of metallic Pd and higher ratio of Sn , which benefit H O production and selectivity.

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Effect of Zn addition on the direct synthesis of hydrogen peroxide over supported palladium catalysts

Cited by 67 publications

References 65 publications

Looking for the “Dream Catalyst” for Hydrogen Peroxide Production from Hydrogen and Oxygen

Looking for the “Dream Catalyst” for Hydrogen Peroxide Production from Hydrogen and Oxygen

Recent Advances in the Direct Synthesis of H₂O₂

Promoting the Direct H₂O₂ Generation Catalysis by Using Hollow Pd–Sn Intermetallic Nanoparticles

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Effect of Zn addition on the direct synthesis of hydrogen peroxide over supported palladium catalysts

Cited by 67 publications

References 65 publications

Looking for the “Dream Catalyst” for Hydrogen Peroxide Production from Hydrogen and Oxygen

Looking for the “Dream Catalyst” for Hydrogen Peroxide Production from Hydrogen and Oxygen

Recent Advances in the Direct Synthesis of H2O2

Promoting the Direct H2O2 Generation Catalysis by Using Hollow Pd–Sn Intermetallic Nanoparticles

Contact Info

Product

Resources

About

Recent Advances in the Direct Synthesis of H₂O₂

Promoting the Direct H₂O₂ Generation Catalysis by Using Hollow Pd–Sn Intermetallic Nanoparticles