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Related Concept Videos

Radiation: Applications01:17

Radiation: Applications

The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
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IR Absorption Frequency: Hybridization01:21

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Related Experiment Video

Updated: May 10, 2026

In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
11:38

In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework

Published on: February 1, 2020

Superblackbody Metasurface Activates CO2 Vibrational Mode for Enhanced Selectivity in CO2 Reduction.

Joel Y Y Loh1,2, Rithichan Chhorn1, Geetu Sharma3,2

  • 1Department of Electrical and Electronics Engineering, Photon Science Institute, University of Manchester, Oxford Road, ManchesterM13 9PY, United Kingdom.

ACS Nano
|May 8, 2026
PubMed
Summary

Engineered thermal metasurfaces enhance catalysis by selectively activating carbon dioxide (CO2) above the surface, boosting carbon monoxide (CO) production and selectivity while suppressing unwanted methane (CH4) formation.

Keywords:
catalysismetamaterialsmetasurfacesreverse water gas shiftsuper-Planckiansuperblackbodythermal metamaterials

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In situ FTIR Spectroscopy as a Tool for Investigation of Gas/Solid Interaction: Water-Enhanced CO2 Adsorption in UiO-66 Metal-Organic Framework
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Area of Science:

  • Surface science
  • Materials science
  • Catalysis engineering

Background:

  • Thermal activation is crucial for catalysis, occurring via surface adsorbates or radiation.
  • Current methods often lack control over activation and product desorption.
  • Metasurfaces offer novel ways to control thermal emission and absorption.

Purpose of the Study:

  • To engineer Ni/SiO2 thermal metasurfaces for enhanced CO2 catalytic conversion.
  • To investigate the impact of metasurface absorption bandwidth on catalytic performance.
  • To understand the mechanisms of reactant activation and product desorption.

Main Methods:

  • Fabrication of two Ni/SiO2 metasurface configurations (broadband and narrowband).
  • Thermal dipole simulations to analyze near-field emission and field confinement.
  • Experimental catalytic testing for CO production and selectivity.
  • In situ spectroscopic analysis (diffused reflectance Fourier transform spectroscopy).
  • Density functional theory (DFT) simulations for mechanistic insights.

Main Results:

  • Both metasurfaces exhibited superblackbody near-field emission at 4.3 μm.
  • The broadband metasurface showed higher CO production rate and >50% improved CO/CH4 selectivity.
  • Spectroscopy revealed reduced carbonate intermediates and faster CO desorption on the broadband metasurface.
  • DFT simulations confirmed that CO2 bond stretching facilitates chemisorption and CO formation, suppressing methanation.

Conclusions:

  • Metasurface design can decouple reactant activation and product desorption in catalysis.
  • Broadband metasurfaces enhance CO2 conversion by promoting CO desorption and suppressing methanation.
  • This approach offers a physically driven pathway for optimizing catalytic processes.