The state of palladium in the nanosized hydrogenation catalysts modified with elemental phosphorus

Belykh, L. B.; Skripov, N. I.; Akimov, V. V.; Таусон, В. Л.; Stepanova, T. P.; Schmidt, Friedrich

doi:10.1134/s1070363213120062

Cited by 16 publications

(7 citation statements)

References 20 publications

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“…As for P, phosphate species (derived from the phosphine ligand) are clearly observable while a broad feature matching phosphide binding energy shifts can also be detected. Electronic modification of Pd by P is possible yet is not significantly reflected in the Pd binding energy shifts as indicated by XPS studies on Pd–P alloys. − The same studies also point out that the 31 P NMR spectra shift to lower binding energy when interacting with Pd, consistent with the present XPS results. As such, it is difficult to draw definitive conclusions regarding a significant difference between the electronic properties of the two catalysts, which is also evident in the CO DRIFTS data where the linear CO stretching frequencies for both catalysts differ by only about 20 cm –1 .…”

Section: Discussionsupporting

confidence: 87%

Direct Synthesis of Low-Coordinate Pd Catalysts Supported on SiO₂ via Surface Organometallic Chemistry

et al. 2016

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Highly dispersed low-coordinate Pd sites on SiO 2 are fabricated by grafting the Pd II PCP-pincer complex ( tBu PCP)Pd−OH ( tBu PCP = 2,6-C 6 H 3 (CH 2 P t Bu 2 ) 2 ) on SiO 2 , followed by calcination with ozone (100 °C) and reduction with H 2 (300 °C). The chemisorption process and structure of this organometallic complex on SiO 2 is established by solutionphase 1 H and 31 P NMR and solid-state 31 P CPMAS NMR spectroscopy, XPS, DRIFTS, and AC-HAADF-STEM. The CO adsorption properties of the Pd centers reveal a surprisingly high fraction of adsorption sites where CO is bound in a linear fashion, indicative of low-coordinate Pd. Furthermore, enhanced selectivity of these catalyst centers in aerobic alcohol oxidation versus a control catalyst argues that these low-coordinate sites are the catalytically active sites.

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Section: Discussionsupporting

confidence: 87%

Direct Synthesis of Low-Coordinate Pd Catalysts Supported on SiO₂ via Surface Organometallic Chemistry

et al. 2016

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“…Earlier, homogeneous hydrogenation employed transition metals such as Pd, Pt, Rh, and Ru . However, incorporation of phosphorus enhanced the hydrogenation efficiency as compared to heavy metals . Non‐noble‐metal catalysts have been proposed for environmental and economic concerns .…”

Section: Photocatalysts For Solar Fuel Productionmentioning

confidence: 99%

Applications of Phosphorene and Black Phosphorus in Energy Conversion and Storage Devices

Pang

Bachmatiuk

Yin

et al. 2017

Advanced Energy Materials

448

253

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Black phosphorus was first synthesized by Bridgman in 1914 [1] but has been less intensively studied in the past century due The successful isolation of phosphorene (atomic layer thick black phosphorus) in 2014 has currently aroused the interest of 2D material researchers. In this review, first, the fundamentals of phosphorus allotropes, phosphorene, and black phosphorus, are briefly introduced, along with their structures, properties, and synthesis methods. Second, the readers are presented with an overview of their energy applications. Particularly in electrochemical energy storage, the large interlayer spacing (0.53 nm) in phosphorene allows the intercalation/deintercalation of larger ions as compared to its graphene counterpart. Therefore, phosphorene may possess greater potential for high electrochemical performance. In addition, the status of lithium ion batteries as well as secondary sodium ion batteries is reviewed. Next, each application for energy generation, conversion, and storage is described in detail with milestones as well as the challenges. These emerging applications include supercapacitors, photovoltaic devices, water splitting, photocatalytic hydrogenation, oxygen evolution, and thermoelectric generators. Finally the fast-growing dynamic field of phosphorene research is summarized and perspectives on future possibilities are presented calling on the efforts of chemists, physicists, and material scientists

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“…[63] The palladium spectrum of S-Pd also shows no palladiumi nt he dark part, whereas it is detectable throught he Pd 3d doublet at 338.3 eV (Pd 3d 5/2 )i nt he irradiated part. [64] In conclusion, the fabrication of spatially-resolved metallopolymer-coated surfaces through the preloading approachw as successfully achieved for all noted metallopolymers. Ak ey point for successful photoligation was to increase the number of photonsr eaching the active surface layer by altering the experimental setup.…”

Section: Surfaceattachment Through Preloaded Metallopolymersmentioning

confidence: 72%

“…The platinum spectrum also shows no metal complex in the non‐irradiated area, whereas it is clearly detectable through the Pt 4f doublet at 73.1 eV (Pt 4f 7/2 ) in the irradiated part . The palladium spectrum of S‐Pd also shows no palladium in the dark part, whereas it is detectable through the Pd 3d doublet at 338.3 eV (Pd 3d 5/2 ) in the irradiated part …”

Section: Resultsmentioning

confidence: 97%

Spatially‐Resolved Multiple Metallopolymer Surfaces by Photolithography

Müller

Feuerstein

Trouillet

et al. 2018

Chemistry A European J

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A tetrazole‐based photoligation protocol for the spatially‐resolved encoding of various defined metallopolymers onto solid surfaces is introduced. By using this approach, fabrication of bi‐ and trifunctional metallopolymer surfaces with different metal combinations were achieved. Specifically, α‐ω‐functional copolymers containing bipyridine as well as triphenylphosphine ligands were synthesized through reversible addition‐fragmentation chain transfer (RAFT) polymerization, and subsequently metal loaded to afford metallopolymers of the widely‐used metals gold, palladium, and platinum. Spatially‐resolved surface attachment was achieved by means of a nitrile imine‐mediated tetrazole‐ene cycloaddition (NITEC) based photoligation protocol, exploiting tethered tetrazoles and metallopolymers equipped with a maleimide chain terminus. Metallopolymer coated surfaces with three different metals were prepared and characterized by time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) and spatially‐resolved X‐ray photoelectron spectroscopy (XPS) mapping, supporting the preserved chemical composition of the surface‐bound metallopolymers. The established photochemical technology platform for arbitrary spatially‐resolved metallopolymer surface designs enables the patterning of multiple metallopolymers onto solid substrates. This allows for the assembly of designer metallopolymer substrates.

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The state of palladium in the nanosized hydrogenation catalysts modified with elemental phosphorus

Cited by 16 publications

References 20 publications

Direct Synthesis of Low-Coordinate Pd Catalysts Supported on SiO₂ via Surface Organometallic Chemistry

Direct Synthesis of Low-Coordinate Pd Catalysts Supported on SiO₂ via Surface Organometallic Chemistry

Applications of Phosphorene and Black Phosphorus in Energy Conversion and Storage Devices

Spatially‐Resolved Multiple Metallopolymer Surfaces by Photolithography

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The state of palladium in the nanosized hydrogenation catalysts modified with elemental phosphorus

Cited by 16 publications

References 20 publications

Direct Synthesis of Low-Coordinate Pd Catalysts Supported on SiO2 via Surface Organometallic Chemistry

Direct Synthesis of Low-Coordinate Pd Catalysts Supported on SiO2 via Surface Organometallic Chemistry

Applications of Phosphorene and Black Phosphorus in Energy Conversion and Storage Devices

Spatially‐Resolved Multiple Metallopolymer Surfaces by Photolithography

Contact Info

Product

Resources

About

Direct Synthesis of Low-Coordinate Pd Catalysts Supported on SiO₂ via Surface Organometallic Chemistry

Direct Synthesis of Low-Coordinate Pd Catalysts Supported on SiO₂ via Surface Organometallic Chemistry