The Experts below are selected from a list of 141 Experts worldwide ranked by ideXlab platform

Martin Pumera - One of the best experts on this subject based on the ideXlab platform.

  • inherent electrochemistry of layered post transition Metal halides the unexpected effect of potential cycling of pbi2
    ChemInform, 2015
    Co-Authors: Chun Kiang Chua, Zdeněk Sofer, Chee Shan Lim, Martin Pumera
    Abstract:

    Electrochemical potential cycling of PbI2 in phosphate buffer leads to the formation of Pb5(PO4)3Cl with hexagonal symmetry (space group P63/m, apatite-type structure).

  • inherent electrochemistry of layered post transition Metal halides the unexpected effect of potential cycling of pbi2
    Chemistry: A European Journal, 2015
    Co-Authors: Chun Kiang Chua, Zdeněk Sofer, Chee Shan Lim, Martin Pumera
    Abstract:

    The development of two-dimensional nanomaterials has expedited the growth of advanced technological applications. PbI2 is a layered inorganic solid with important and unique properties suitable for applications in the detection of electromagnetic radiation. While the optical and electrical properties of layered PbI2 have been generally established, its electrochemistry has remained largely unexplored. In this work, we examine the inherent electrochemistry of PbI2 in relation to its morphological and structural properties. A direct comparison between commercially available and solution-grown PbI2 showed high similarity in properties based on characterizations by X-ray photoelectron spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The respective layered PbI2 materials also exhibited similar inherent electrochemistry. Electrochemical potential cycling of PbI2 in phosphate buffer resulted in the dissolution of iodide ions from PbI2 to form complex lead-phosphate-chloride with the oxygen groups of the phosphate ions while retaining the hexagonal structure. In the case of KCl solution, the formation of PbO2 was observed.

Andrew Ocarsly - One of the best experts on this subject based on the ideXlab platform.

  • probing the mechanism of aqueous co2 reduction on post transition Metal electrodes using atr ir spectroelectrochemistry
    ACS Catalysis, 2016
    Co-Authors: James E Pande, Mao F Aruch, Andrew Ocarsly
    Abstract:

    The role of metastable surface oxides in the reduction of CO2 on lead, bismuth, tin, and indium electrodes was probed using in situ attenuated total reflectance infrared (ATR-IR) spectroelectrochemistry. The effect of the surface oxide on the Faradaic efficiency of CO2 reduction to formic acid was studied by etching and anodizing the electrodes, and the results were correlated with respect to the observed spectroscopic behavior of the catalysts. A metastable oxide is observed on lead, tin, and indium cathodes under the electrochemical conditions necessary for CO2 reduction. Spectroscopic evidence suggests that bismuth electrodes are fully reduced to the Metal under the same conditions. The dynamics of the electroreduction of CO2 at lead and bismuth electrodes appears to be different from that on on tin and indium electrodes, which suggests that these catalysts act through different mechanistic pathways. The Post-Transition-Metal block can be divided into three classes of materials: oxide-active materials,...

Chun Kiang Chua - One of the best experts on this subject based on the ideXlab platform.

  • inherent electrochemistry of layered post transition Metal halides the unexpected effect of potential cycling of pbi2
    ChemInform, 2015
    Co-Authors: Chun Kiang Chua, Zdeněk Sofer, Chee Shan Lim, Martin Pumera
    Abstract:

    Electrochemical potential cycling of PbI2 in phosphate buffer leads to the formation of Pb5(PO4)3Cl with hexagonal symmetry (space group P63/m, apatite-type structure).

  • inherent electrochemistry of layered post transition Metal halides the unexpected effect of potential cycling of pbi2
    Chemistry: A European Journal, 2015
    Co-Authors: Chun Kiang Chua, Zdeněk Sofer, Chee Shan Lim, Martin Pumera
    Abstract:

    The development of two-dimensional nanomaterials has expedited the growth of advanced technological applications. PbI2 is a layered inorganic solid with important and unique properties suitable for applications in the detection of electromagnetic radiation. While the optical and electrical properties of layered PbI2 have been generally established, its electrochemistry has remained largely unexplored. In this work, we examine the inherent electrochemistry of PbI2 in relation to its morphological and structural properties. A direct comparison between commercially available and solution-grown PbI2 showed high similarity in properties based on characterizations by X-ray photoelectron spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The respective layered PbI2 materials also exhibited similar inherent electrochemistry. Electrochemical potential cycling of PbI2 in phosphate buffer resulted in the dissolution of iodide ions from PbI2 to form complex lead-phosphate-chloride with the oxygen groups of the phosphate ions while retaining the hexagonal structure. In the case of KCl solution, the formation of PbO2 was observed.

Albert G Nasibulin - One of the best experts on this subject based on the ideXlab platform.

  • raman spectroscopy of gase and inse post transition Metal chalcogenides layers
    Faraday Discussions, 2021
    Co-Authors: M R Molas, Anastasia V Tyurnina, Viktor Zolyomi, A K Ott, Daniel J Terry, Matthew J Hamer, Celal Yelgel, A Babinski, Albert G Nasibulin
    Abstract:

    III–VI Post-Transition Metal chalcogenides (InSe and GaSe) are a new class of layered semiconductors, which feature a strong variation of size and type of their band gaps as a function of number of layers (N). Here, we investigate exfoliated layers of InSe and GaSe ranging from bulk crystals down to monolayer, encapsulated in hexagonal boron nitride, using Raman spectroscopy. We present the N-dependence of both intralayer vibrations within each atomic layer, as well as of the interlayer shear and layer breathing modes. A linear chain model can be used to describe the evolution of the peak positions as a function of N, consistent with first principles calculations.

Anastasia V Tyurnina - One of the best experts on this subject based on the ideXlab platform.

  • raman spectroscopy of gase and inse post transition Metal chalcogenides layers
    Faraday Discussions, 2021
    Co-Authors: M R Molas, Anastasia V Tyurnina, Viktor Zolyomi, A K Ott, Daniel J Terry, Matthew J Hamer, Celal Yelgel, A Babinski, Albert G Nasibulin
    Abstract:

    III–VI Post-Transition Metal chalcogenides (InSe and GaSe) are a new class of layered semiconductors, which feature a strong variation of size and type of their band gaps as a function of number of layers (N). Here, we investigate exfoliated layers of InSe and GaSe ranging from bulk crystals down to monolayer, encapsulated in hexagonal boron nitride, using Raman spectroscopy. We present the N-dependence of both intralayer vibrations within each atomic layer, as well as of the interlayer shear and layer breathing modes. A linear chain model can be used to describe the evolution of the peak positions as a function of N, consistent with first principles calculations.