Pd-Ga model SCALMS: Characterization and stability of Pd single atom sites

Kettner, Miroslav; Maisel, Sven; Stumm, Corinna; Schwarz, Matthias; Schuschke, Christian; Görling, Andreas; Libuda, Jörg

doi:10.1016/j.jcat.2018.10.027

Cited by 38 publications

(46 citation statements)

References 73 publications

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“…Additionally, considering the high boiling point of LM, researchers have shown widespread interest in its application as a high-temperature catalyst and have supported catalytically active LM solutions (SCALMS) as a very promising class of heterogeneous catalyst. 155,156 As shown in Figure 18D, both Pd and Ga metal evaporators were installed in a geometry that allowed metal deposition while performing infrared spectroscopy. 155 Furthermore, Figure 18E demonstrates a comprehensive microscopy picture of the working principle of the Ga-Rh-supported catalytically active LM solution.…”

Section: Reviewmentioning

confidence: 99%

“…155,156 As shown in Figure 18D, both Pd and Ga metal evaporators were installed in a geometry that allowed metal deposition while performing infrared spectroscopy. 155 Furthermore, Figure 18E demonstrates a comprehensive microscopy picture of the working principle of the Ga-Rh-supported catalytically active LM solution. 157 Summarizing the above discussion, one can draw the conclusion that LM offers unprecedented chemistry.…”

Section: Reviewmentioning

confidence: 99%

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Liquid Metal Composites

Chen

Wang

Zhao

et al. 2020

Matter

360

238

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Liquid metal (LM) with high electrical conductivity, thermal conductivity, excellent biocompatibility, and extraordinary fluidity has emerged as a promising class of functional materials. However, such materials still encounter many practical challenges due to the rather limited forms available so far. As a promising remedy, LM composites in synergy with other materials would open tremendous opportunities for fundamental research or practical applications. This is because controllable integration of base LM with functional materials (e.g., metal nanoparticles, polymers, and drug molecules) would significantly tune the intrinsic properties of LM as desired, enabling it to offer further major potential in tackling various sectors' challenging issues, including thermal management, biomedicine, chemical catalysis, flexible electronics, and soft robots. Here, we systematically summarize and review the fundamental progress in pursuing LM composites. The basic composite strategies are outlined in three categories: LM composites with core-shell structure, LM-polymer composites, and LM-particle composites. The effectiveness of the composite strategy is illustrated via the typical applications of LM composites in representative fields. The challenges and perspectives in developing LM composites are also identified and interpreted to better guide future research. It is expected that the coming LM era will witness a new world of fruitful composites thereby discovered or invented.

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Section: Reviewmentioning

confidence: 99%

Section: Reviewmentioning

confidence: 99%

Liquid Metal Composites

Chen

Wang

Zhao

et al. 2020

Matter

360

238

View full text Add to dashboard Cite

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“…Ga. [10][11][12]19 The catalytic reaction in SCALMS occurs exclusively at the liquid metal/gas interface. 10,12,[19][20][21][22][23][24][25] Contrary to conventional SLP catalysis, the reactants and products are insoluble in the liquid phase. In addition, the liquid metal/gas interface is highly dynamic on an atomic scale.…”

Section: Introductionmentioning

confidence: 99%

Capturing spatially resolved kinetic data and coking of Ga–Pt supported catalytically active liquid metal solutions during propane dehydrogenationin situ

et al. 2021

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“…[1,[3][4][5] Highly mobile, single transition metal atoms dynamically appearing as active centers at the transition-metal-depleted gas/liquid interface have been proposed as an explanation for the superior performance of SCALMS-based catalysts. [1,[3][4][5][6][7][8] For the application of such catalysts, the formation of oxides upon exposure to ambient conditions and necessary activation processes to obtain the active liquid metal catalyst can play an important role. Using spatially resolved time-of-flight secondary ion mass spectrometry (TOF-SIMS), Chabala studied the oxidation of pure liquid Ga at 27.7°C, where liquid Ga is slightly supercooled.…”

Section: Introductionmentioning

confidence: 99%

Oxidation induced restructuring of Rh–Ga SCALMS model catalyst systems

Wittkämper

Maisel

et al. 2020

The Journal of Chemical Physics

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Supported catalytically active liquid metal solutions (SCALMS) have been receiving increasing attention recently. We investigated the oxidation behavior of macroscopic Rh-Ga alloy droplets and Rh-Ga model catalyst nanoparticles supported on SiO 2 /Si(100) with low Rh content (<2.5 at %) by x-ray photoelectron spectroscopy in ultra-high vacuum and under near-ambient pressure conditions using different photon energies and also using transmission electron microscopy. The experiments are accompanied by computational studies on the Ga oxide/Rh-Ga interface and Rh-Ga intermetallic compounds. For both Rh-Ga alloy droplets and Rh-Ga model catalyst nanoparticles, exposure to molecular oxygen leads to the formation of an oxide shell in which Rh is enriched. High-resolution transmission electron microscopy on the Rh-Ga nanoparticles confirms the formation of an approximately 4 nm thick gallium oxide film containing Rh. Based on ab-initio molecular dynamics and computational studies on the Ga 2 O 3 /Ga interface, it is concluded that Rh incorporation into the Ga 2 O 3 film occurs by substituting octahedrally coordinated Ga.

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Pd-Ga model SCALMS: Characterization and stability of Pd single atom sites

Cited by 38 publications

References 73 publications

Liquid Metal Composites

Liquid Metal Composites

Capturing spatially resolved kinetic data and coking of Ga–Pt supported catalytically active liquid metal solutions during propane dehydrogenationin situ

Oxidation induced restructuring of Rh–Ga SCALMS model catalyst systems

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