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HPC 20

High Pressure Cell for Surface Analysis Applications

HPC 20 is a high pressure cell for SPECS System Modules designed to simulate and model catalytic and other high pressure processes on sample surfaces. Specialized design with minimized reaction volume and chamber in chamber design with water cooled inner chamber and special sealing mechanism for operation up to 20 bar. SPECS has implemented a special heating mechanism by halogen lamp which only heats the reactive sample area and therefore prevents reactions at other surfaces and allows heating in reaction conditions up to 800 °C. The high pressure cell works with a wide range of gases including O2, CO2, N2, H2, and all inert gases. The sample handling is designed for SPECS type SH 2/12 sample plates for up to 10 mm x 10 mm sample size. In combination with surface analysis systems, other experiments like XPS, AES or UPS are possible.

KEY FEATURES

  • Minimized reaction volume
  • Water cooling
  • Up to 20 bar operation pressure
  • Halogen lamp heating for restricted area heating
  • Wide range of gases 

PUBLICATIONS

  1. (2021) <p>In situ identification of the metallic state of Ag nanoclusters in oxidative dispersion</p>

    Oxidative dispersion has been widely used in regeneration of sintered metal catalysts and fabrication of single atom catalysts, which is attributed to an oxidation-induced dispersion mechanism. However, the interplay of gas-metal-support interaction in the dispersion processes, especially the gas-metal interaction has not been well illustrated. Here, we show dynamic dispersion of silver nanostructures on silicon nitride surface under reducing/oxidizing conditions and during carbon monoxide oxidation reaction. Utilizing environmental scanning (transmission) electron microscopy and near-ambient pressure photoelectron spectroscopy/photoemission electron microscopy, we unravel a new adsorption-induced dispersion mechanism in such a typical oxidative dispersion process. The strong gas-metal interaction achieved by chemisorption of oxygen on nearly-metallic silver nanoclusters is the internal driving force for dispersion. In situ observations show that the dispersed nearly-metallic silver nanoclusters are oxidized upon cooling in oxygen atmosphere, which could mislead to the understanding of oxidation-induced dispersion. We further understand the oxidative dispersion mechanism from the view of dynamic equilibrium taking temperature and gas pressure into account, which should be applied to many other metals such as gold, copper, palladium, etc. and other reaction conditions.



    Rongtan Li, Xiaoyan Xu, Beien Zhu, Xiao-Yan Li, Yanxiao Ning, Rentao Mu, Pengfei Du, Mengwei Li, Huike Wang, Jiajie Liang, Yongsheng Chen, Yi Gao, Bing Yang, Qiang Fu & Xinhe Bao
    NATURE COMMUNICATIONS | (2021) 12:1406
    Read more

SPARE PARTS

2
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Product description
Article No.
 
Halogen lamp 1200 W 230 V

Replacement bulb for HPC-20

2060004184
Over-pressure disk on DN40CF

Replacement over-pressure burst disk for HPC-20

2060010364

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