Direct synthesis of H2O2 over Pd supported on rare earths promoted zirconia

Bernardini, Alberto; Gemo, Nicola; Biasi, Pierdomenico; Canu, Paolo; Mikkola, Jyri‐Pekka; Salmi, Tapio; Lanza, Roberto

doi:10.1016/j.cattod.2014.12.033

Cited by 14 publications

(5 citation statements)

References 33 publications

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“…As has been validated by other researchers, the anchoring effect of Ni 2+ J o u r n a l P r e -p r o o f and Co 2+ between the metal and support interface could help in forming more stable metal clusters due to the enhanced metal-support interactions [32,33]. The Pd/SiO2 catalyst exhibited a typical negative peak at 50 °C due to the decomposition of Pd hydride formed at room temperature during the reduction of PdO [34]. The peaks detected between 50 and 100 °C can be ascribed to the reduction of PdO.…”

Section: Characterization Of the Catalysts And Raw Materialsmentioning

confidence: 53%

Tuning the product distribution during the catalytic pyrolysis of waste tires: The effect of the nature of metals and the reaction temperature

et al. 2021

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Section: Characterization Of the Catalysts And Raw Materialsmentioning

confidence: 53%

Tuning the product distribution during the catalytic pyrolysis of waste tires: The effect of the nature of metals and the reaction temperature

et al. 2021

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“…Pd (0.3 or 0.6 wt %) was supported also on zirconia promoted with rare earth oxides (Y 2 O 3 and La 2 O 3 ) [103]. These materials were chosen because of their capability to increase both the metal dispersion and the O 2 mobility (which favors the active metal activity).…”

Section: Effect Of Supportsmentioning

confidence: 99%

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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“…interactions occurring on the catalyst materials (metal phase and support) 6,7,8 , c) starting materials used as well as the nature of the products and their redox properties 3,6 , d) the solvent chosen 3 and e) and feasible H 2 O 2 direct synthesis, one should consider issues such as i) improving the selectivity towards H 2 O 2 , ii) the safety of the reaction, obtained through tailored preparation of the catalysts and the study of reactor design, as well as iii) the demand on the level of concentration of H 2 O 2 that should be obtained (around 8 wt.% 4 ). Many aspects of the CDS process are today still foggy albeit the combination between chemistry and chemical engineering will likely boost the understanding and the interplay of the intrinsic material surface properties, mass transfer phenomena and detailed reaction mechanism.…”

Section: Introductionmentioning

confidence: 99%

Revealing the role of bromide in the H₂O₂ direct synthesis with the catalyst wet pretreatment method (CWPM)

et al. 2016

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A tailor-made Pd 0 /K2621 catalyst was subjected to post synthesis modification via a wet treatment procedure. The aim was the understanding of the role of promoters and how -if any -improvements could be qualitatively related to the catalyst performance for the H 2 O 2 direct synthesis. The Catalyst Wet Pretreatment Method (CWPM) was applied in different methanolic solutions containing H 2 O 2 , NaBr and H 3 PO 4 , either as single modifiers or as a mixture. The catalyst was characterized by Transmission Electron Microscopy (TEM) and X-ray Photoelectron Spectroscopy (XPS). It was concluded that the modified catalysts give rise to higher selectivities compared to the pristine reference catalyst thus opening a possibility to exclude the addition of the undesirable selectivity enhancers in the reaction medium. This work provides original evidence on the role of promoters, especially bromide, allowing the formulation of a new reaction mechanism for one of the most ISCRE 24 -Foundations and

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Direct synthesis of H2O2 over Pd supported on rare earths promoted zirconia

Cited by 14 publications

References 33 publications

Tuning the product distribution during the catalytic pyrolysis of waste tires: The effect of the nature of metals and the reaction temperature

Tuning the product distribution during the catalytic pyrolysis of waste tires: The effect of the nature of metals and the reaction temperature

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

Revealing the role of bromide in the H₂O₂ direct synthesis with the catalyst wet pretreatment method (CWPM)

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Direct synthesis of H2O2 over Pd supported on rare earths promoted zirconia

Cited by 14 publications

References 33 publications

Tuning the product distribution during the catalytic pyrolysis of waste tires: The effect of the nature of metals and the reaction temperature

Tuning the product distribution during the catalytic pyrolysis of waste tires: The effect of the nature of metals and the reaction temperature

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

Revealing the role of bromide in the H2O2 direct synthesis with the catalyst wet pretreatment method (CWPM)

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Product

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Revealing the role of bromide in the H₂O₂ direct synthesis with the catalyst wet pretreatment method (CWPM)