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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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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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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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Ladder Diagrams: Complexation Equilibria01:07

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Ladder diagrams are useful for evaluating equilibria involving metal-ligand complexes. The vertical scale of the ladder diagram represents the concentration of unreacted or free ligand, pL. The horizontal lines on the scale depict the log of stepwise formation constants for metal-ligand complexes and indicate the dominant species in all the regions.
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Programming Cascade Catalysis in Multielement Dual-Heterostructured Catalysts Through Gradient Adsorption Potentials.

Jinli Chen1, Rong Hu1, Haojie Liu1

  • 1State Key Laboratory of New Textile Materials and Advanced Processing, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, China.

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PubMed
Summary
This summary is machine-generated.

This study introduces a novel catalyst design for efficient cascade catalysis, programming intermediate spillover via gradient adsorption potentials. This approach significantly enhances multi-step reactions like oxygen evolution, improving catalyst performance and stability.

Keywords:
dual‐heterostructure catalystsintermediate spillovermultielement catalystsoxygen evolution reaction

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Area of Science:

  • Catalysis
  • Materials Science
  • Electrochemistry

Background:

  • Single active sites limit catalytic reactions with multiple intermediates.
  • Designing multi-site catalysts for efficient intermediate spillover and cascade catalysis is challenging.

Purpose of the Study:

  • To develop a strategy for programming intermediate spillover and cascade catalysis in multielement dual-heterostructured catalysts.
  • To engineer a catalyst with gradient adsorption potentials for directional intermediate transport.

Main Methods:

  • Utilized first-principles screening and elemental reducibility to design a RuIr-Mo/WVOx catalyst.
  • Engineered a dual-heterostructured architecture with gradient adsorption potentials (WVOx → Mo → RuIr).
  • Modeled the acidic oxygen evolution reaction to demonstrate cascade catalysis.

Main Results:

  • Achieved a continuous gradient adsorption sequence enabling directional *OH transport.
  • The optimized catalyst exhibited an overpotential of 183 mV at 10 mA cm⁻² for oxygen evolution.
  • Demonstrated stable operation for 450 h at 100 mA cm⁻², outperforming benchmarks.

Conclusions:

  • Gradient adsorption engineering is a viable framework for programming cascade catalysis in multistep reactions.
  • The developed dual-heterostructured catalyst design enhances catalytic efficiency and stability.
  • This approach offers a general design principle for advanced catalytic systems.