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Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
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Crystal Field Theory
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Descriptor-Based Design Principle for Two-Dimensional Single-Atom Catalysts: Carbon Dioxide Electroreduction.

Hao Yuan1,2, Zhenyu Li1, Xiao Cheng Zeng2

  • 1Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China.

The Journal of Physical Chemistry Letters
|April 17, 2020
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Summary
This summary is machine-generated.

Designing active single-atom catalysts (SACs) for carbon dioxide reduction reaction (CO2RR) is crucial. This study identifies key transition metal properties that predict high catalytic activity for CO2RR using graphitic carbon nitride supports.

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Area of Science:

  • Materials Science
  • Catalysis
  • Electrochemistry

Background:

  • Single-atom catalysis (SAC) is a rapidly advancing field for efficient chemical transformations.
  • The carbon dioxide reduction reaction (CO2RR) is vital for sustainable energy and chemical production.
  • Developing highly active and selective catalysts for CO2RR remains a significant challenge.

Purpose of the Study:

  • To establish a predictive principle for designing highly active single-atom catalysts (SACs) for the carbon dioxide reduction reaction (CO2RR).
  • To identify intrinsic descriptors of transition metals that correlate with CO2RR catalytic performance.
  • To screen potential SACs for efficient CO2RR.

Main Methods:

  • Systematic computational examination of 24 transition metals supported on graphitic carbon nitride (g-CN) monolayers.
  • Analysis of the correlation between catalytic activity and adsorption free energies of key intermediates (OH and OCH).
  • Identification of intrinsic electronic and thermodynamic properties of transition metals as descriptors.

Main Results:

  • Catalytic activity for CO2RR is strongly linked to the adsorption energies of OH and OCH intermediates.
  • The number of d-shell electrons and the enthalpy of vaporization of transition metals are identified as key intrinsic descriptors.
  • These descriptors demonstrate universality across different support materials, such as C2N monolayers.
  • Ni@g-CN, Cu@g-CN, and Co@C2N are predicted as promising SACs for CO2RR.

Conclusions:

  • A fundamental principle for designing active SACs for CO2RR based on transition metal intrinsic properties has been established.
  • The findings provide a rational approach for accelerating the discovery of efficient catalysts for CO2RR.
  • This work contributes to the development of sustainable technologies for carbon utilization.