Ni–Pd bimetallic catalysts for the direct synthesis of H<sub>2</sub>O<sub>2</sub>– unusual enhancement of Pd activity in the presence of Ni

Maity, Sisir; Eswaramoorthy, M.

doi:10.1039/c6ta00486e

Cited by 71 publications

(47 citation statements)

References 30 publications

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“…Metals other than Au and Pt were also tested as promoters to improve the performance of Pd catalysts in the direct synthesis of H 2 O 2 . In 2016, a bimetallic sample containing a non-noble metal (Ni) was also proposed [80]. The Ni0.1Pd0.9 catalyst was reported to show three times higher activity compared to the sample with Pd alone and proved stable for 72 h. More recently, on the basis of density functional theory (DFT) studies, Xu et al reported the possible increase of H 2 O 2 production by using different metals such as tungsten, lead and molybdenum [81].…”

Section: Strukul and Coworkersmentioning

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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Section: Strukul and Coworkersmentioning

confidence: 99%

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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“…With subsequent studies further demonstrating the remarkable effects of Pd modification by Sn [24,25]. While others have investigated the beneficial effects of Zn [26], Ni [27], and Te [28] into Pd nanoparticles, with computational studies by Xu et al predicting Pd-Pd and Pd-W as potential candidates for highly active catalysts for the direct synthesis of H2O2 [29].…”

Section: Introductionmentioning

confidence: 99%

Direct Synthesis of Hydrogen Peroxide Using Cs-Containing Heteropolyacid-Supported Palladium–Copper Catalysts

et al. 2019

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The direct synthesis of hydrogen peroxide (H2O2) from molecular hydrogen and oxygen could represent a green and economically attractive alternative to the current indirect anthraquinone process used for the industrial production of hydrogen peroxide. This reaction has been investigated using palladium supported on the Cs-containing heteropolyacid Cs2.5H0.5PW12O40. In addition, the effect of adding copper as a potential activity promoter was investigated. These catalysts were also evaluated for the subsequent degradation of hydrogen peroxide. The catalytic activity of the 0.5 wt.%Pd/Cs2.5H0.5PW12O40 catalyst towards hydrogen peroxide synthesis was greater than that of both the mono-metallic Cu or bi-metallic Pd-Cu analogues with the incorporation of Cu to Pd resulting in a significant decrease in catalytic selectivity for the formation of hydrogen peroxide. Moreover, 0.5 wt.%Pd/Cs2.5H0.5PW12O40 also showed low activity towards the degradation of hydrogen peroxide. Hence the use of the Cs-containing heteropolyacid as a support for Pd gives higher rates of hydrogen peroxide formation when compared with different supported Pd catalysts prepared using supports used in previous studies.

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Ni–Pd bimetallic catalysts for the direct synthesis of H₂O₂– unusual enhancement of Pd activity in the presence of Ni

Abstract: A highly active NiPd catalyst in comparison with Pd and AuPd catalysts towards direct synthesis of H2O2.

Cited by 71 publications

References 30 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

Direct Synthesis of Hydrogen Peroxide Using Cs-Containing Heteropolyacid-Supported Palladium–Copper Catalysts

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Ni–Pd bimetallic catalysts for the direct synthesis of H2O2– unusual enhancement of Pd activity in the presence of Ni

Abstract: A highly active NiPd catalyst in comparison with Pd and AuPd catalysts towards direct synthesis of H2O2.

Cited by 71 publications

References 30 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

Direct Synthesis of Hydrogen Peroxide Using Cs-Containing Heteropolyacid-Supported Palladium–Copper Catalysts

Contact Info

Product

Resources

About

Ni–Pd bimetallic catalysts for the direct synthesis of H₂O₂– unusual enhancement of Pd activity in the presence of Ni

Recent Advances in the Direct Synthesis of H₂O₂