Novel nanoparticle catalysts for catalytic gas sensing

Morsbach, Eva; Kunz, Sebastian; Bäumer, Marcus

doi:10.1039/c5cy01553g

Cited by 18 publications

(21 citation statements)

References 62 publications

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“…Second, the assembly is not stable during catalysis because some coalescence occurs between the metallic particles which is due to the partial desorption of the ligands. An alternative solution has been recently put forward by Bäumer et al [292]. It is based on the use of bifunctional ligands which link two particles by their two end groups.…”

Section: Application In Heterogeneous Catalysismentioning

confidence: 99%

“…By using ligands formed by an alkyl chain with two terminal amine groups which bound to Pt nanoparticles, a solid porous material is obtained. In this material 50 % of the surface atoms of the particle remain free and the catalytic activity presents a good stability [292]. This new method has been used for hydrogen gas sensing application [292].…”

Section: Application In Heterogeneous Catalysismentioning

confidence: 99%

“…In this material 50 % of the surface atoms of the particle remain free and the catalytic activity presents a good stability [292]. This new method has been used for hydrogen gas sensing application [292]. If these new concepts of catalytic membranes present very promising properties they are not yet employed in industrial catalysis.…”

Section: Application In Heterogeneous Catalysismentioning

confidence: 99%

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Nonisotropic Self‐Assembly of Nanoparticles: From Compact Packing to Functional Aggregates

et al. 2018

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Quantum strongly correlated systems that exhibit interesting features in condensed matter physics often need an unachievable temperature or pressure range in classical materials. One solution is to introduce a scaling factor, namely, the lattice parameter. Synthetic heterostructures named superlattices or supracrystals are synthesized by the assembling of colloidal atoms. These include semiconductors, metals, and insulators for the exploitation of their unique properties. Most of them are currently limited to dense packing. However, some of desired properties need to adjust the colloidal atoms neighboring number. Here, the current state of research in nondense packing is summarized, discussing the benefits, outlining possible scenarios and methodologies, describing examples reported in the literature, briefly discussing the challenges, and offering preliminary conclusions. Penetrating such new and intriguing research fields demands a multidisciplinary approach accounting for the coupling of statistic physics, solid state and quantum physics, chemistry, computational science, and mathematics. Standard interactions between colloidal atoms and emerging fields, such as the use of Casimir forces, are reported. In particular, the focus is on the novelty of patchy colloidal atoms to meet this challenge.

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Section: Application In Heterogeneous Catalysismentioning

confidence: 99%

Section: Application In Heterogeneous Catalysismentioning

confidence: 99%

Section: Application In Heterogeneous Catalysismentioning

confidence: 99%

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Nonisotropic Self‐Assembly of Nanoparticles: From Compact Packing to Functional Aggregates

et al. 2018

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“…At present, three different types of hydrogen gas sensors are commercially available, namely palladium gate metal‐oxide‐silicon field‐effect transistors (MOSFET), metal oxide semiconductor (MOS) sensors, and catalytic combustion devices. [ 3 , 5 , 6 , 7 , 8 ] A major disadvantage of MOS‐based sensors and non‐micro‐machined combustion devices is the high‐power consumption due to high working temperatures (about 400 °C). Furthermore, these sensors have an unfavorably long response time of several minutes, and MOS‐based sensors defy continuous operation because they require recovery after hydrogen loading.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Ligand‐Linked Pt Nanoparticles: Tunable, Three‐Dimensional, Porous Networks for Catalytic Hydrogen Sensing

et al. 2021

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Porous networks of Pt nanoparticles interlinked by bifunctional organic ligands have shown high potential as catalysts in micro‐machined hydrogen gas sensors. By varying the ligand among p‐phenylenediamine, benzidine, 4,4‘‘‐diamino‐p‐terphenyl, 1,5‐diaminonaphthalene, and trans‐1,4‐diaminocyclohexane, new variants of such networks were synthesized. Inter‐particle distances within the networks, determined via transmission electron microscopy tomography, varied from 0.8 to 1.4 nm in accordance with the nominal length of the respective ligand. While stable structures with intact and coordinatively bonded diamines were formed with all ligands, aromatic diamines showed superior thermal stability. The networks exhibited mesoporous structures depending on ligand and synthesis strategy and performed well as catalysts in hydrogen gas microsensors. They demonstrate the possibility of deliberately tuning micro‐ and mesoporosity and thereby transport properties and steric demands by choice of the right ligand also for other applications in heterogeneous catalysis.

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“…[ 15a,15b,20 ] Some studies have already evidenced that NP covalent assembly show better catalytic performances, and in some cases higher stability than isolated NP. [ 20,21 ] Another interesting aspect of these assemblies is the possibility of controlling the interparticle distance via the molecular chemical nature and chain length of the ligand, [ 15a,22 ] and possibly the CE. We have recently demonstrated in the case of 3D Ru NP networks linked with polymantane ligands that it was possible to: i) obtain NP with similar size (1.6–1.8 nm) for a given metal loading whatever the nature of the ligand (diacid or diamine); ii) control the electronic effects by means of the chemical nature of the ligand (acid vs. amine); and iii) control the interparticle distance via the size of the ligand.…”

Section: Introductionmentioning

confidence: 99%

2D and 3D Ruthenium Nanoparticle Covalent Assemblies for Phenyl Acetylene Hydrogenation

et al. 2020

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The bottom‐up covalent assembly of metallic nanoparticles (NP) represents one of the innovative tools in nanotechnology to build functional heterostructures, with the resulting assemblies showing superior collective properties over the individual NP for a broad range of applications. The ability to control the dimensionality of the assembly is one of the major challenges in designing and understanding these advanced materials. Here, two new organic linkers were used as building blocks in order to guide the organization of Ru NP into two‐ or three‐dimensional covalent assemblies. The use of a hexa‐adduct functionalized C60 leads to the formation of 3D networks of 2.2 nm Ru NP presenting an interparticle distance of 3.0 nm, and the use of a planar carboxylic acid triphenylene derivative allows the synthesis of 2D networks of 1.9 nm Ru NP with an interparticle distance of 3.1 nm. The Ru NP networks were found to be active catalysts for the selective hydrogenation of phenylacetylene, reaching good selectivity toward styrene. Overall, we demonstrated that catalyst performances are significantly affected by the dimensionality (2D vs. 3D) of the heterostructures, which can be rationalize based on confinement effects.

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Novel nanoparticle catalysts for catalytic gas sensing

Cited by 18 publications

References 62 publications

Nonisotropic Self‐Assembly of Nanoparticles: From Compact Packing to Functional Aggregates

Nonisotropic Self‐Assembly of Nanoparticles: From Compact Packing to Functional Aggregates

Synthesis and Characterization of Ligand‐Linked Pt Nanoparticles: Tunable, Three‐Dimensional, Porous Networks for Catalytic Hydrogen Sensing

2D and 3D Ruthenium Nanoparticle Covalent Assemblies for Phenyl Acetylene Hydrogenation

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