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Related Concept Videos

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

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Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
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For many years, scientists thought that enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model stated that the enzyme and substrate fit together perfectly in one instantaneous step. However, current research supports a more refined view scientists call induced fit. The induced-fit model expands upon the lock-and-key model by describing a more dynamic interaction between enzyme and substrate. As the enzyme and substrate come together, their interaction causes...
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The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
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Crystal Field Theory
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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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Electronic metal-support interactions in single-atom catalysts.

Pingping Hu1, Zhiwei Huang, Zakariae Amghouz

  • 1Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, 220 Handan Road, Shanghai, 200433 (China).

Angewandte Chemie (International Ed. in English)
|March 7, 2014
PubMed
Summary
This summary is machine-generated.

Researchers developed a stable single-atom silver catalyst by controlling its electronic state. Subtle support structure changes enhanced metal-support interactions, boosting catalytic activity and reducibility for heterogeneous catalysis.

Keywords:
electronic structureheterogeneous catalysismetal-support interactionsoxygen activationsingle-atom catalysis

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Area of Science:

  • Heterogeneous catalysis
  • Materials science
  • Surface chemistry

Background:

  • Controlling electronic properties of single-atom catalysts is crucial for superior performance.
  • Achieving stable single-atom catalysts with tunable electronic states remains a challenge.

Purpose of the Study:

  • To synthesize a stable supported single-atom silver catalyst with a controllable electronic state.
  • To investigate the influence of support structure on catalytic activity and electronic properties.

Main Methods:

  • Utilized anti-Ostwald ripening for catalyst synthesis.
  • Investigated electronic perturbations induced by support structure modifications.
  • Analyzed electronic metal-support interactions and their effect on reactivity.

Main Results:

  • A stable supported single-atom silver catalyst with a controllable electronic state was successfully synthesized.
  • Subtle changes in support structure significantly influenced the electronic state of silver atoms.
  • Higher depletion of the silver 4d electronic state led to stronger metal-support interactions, enhanced reducibility, and increased catalytic activity.

Conclusions:

  • Electronic metal-support interactions are strongly influenced by support structure, impacting intrinsic reactivity.
  • Understanding these interactions is key to developing structure-activity correlations for catalyst design.
  • This work provides insights for creating advanced single-atom catalysts for heterogeneous catalysis.