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Processes at Electrodes01:30

Processes at Electrodes

The electrode interacts with ions in the electrolyte solution at its interface. The rate of oxidation and reduction depends on the speed at which electrons can transfer through this interface. As ions attach to or leave the electrode surface, the electrode acquires a charge, and an electrical potential forms across the interface, making the process more difficult to reach equilibrium. The charge on the electrode affects the local ion concentrations in the solution, though thermal motion...
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Heterogeneous Catalysis

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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Thermal and Photochemical Electrocyclic Reactions: Overview

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Catalysis02:50

Catalysis

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Catalysis01:27

Catalysis

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Updated: May 14, 2026

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
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Published on: April 27, 2018

Engineering and activating adaptive Pt/TiO2 interfacial perimeters for efficient and robust CO oxidation.

Chi Zhang1, Wenxiang Tang2, Xiangyang Li3

  • 1School of Chemical Engineering, Sichuan University, Chengdu, China.

Nature Communications
|May 12, 2026
PubMed
Summary

Researchers developed a sunlight-driven method to create stable, active interfaces on supported metal catalysts. This strategy enhances carbon monoxide (CO) oxidation efficiency and robustness, offering a new approach for catalyst design.

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Area of Science:

  • Materials Science
  • Catalysis
  • Nanotechnology

Background:

  • Designing active and stable interfaces in supported metal catalysts is crucial for enhancing heterogeneous reaction efficiency and selectivity.
  • Tailoring interfacial properties is key to controlling catalytic performance.

Purpose of the Study:

  • To develop a generic sunlight-driven epitaxial growth strategy for engineering catalytically active interfacial perimeters.
  • To create subnanometric platinum (Pt) dispersed on titanium dioxide (TiO2) nanoparticle supports with unique reactive sites.
  • To investigate the adaptive behavior of these interfaces during CO oxidation.

Main Methods:

  • Sunlight-driven epitaxial growth strategy to engineer Pt/TiO2 interfaces.
  • Characterization of interfacial structures and reactive sites (Pt4+-O-Ti3+).
  • Evaluation of catalytic performance for CO oxidation, including dynamic evolution and adsorption behaviors.

Main Results:

  • Engineered subnanometric Pt/TiO2 interfaces with Pt4+-O-Ti3+ reactive sites exhibit superior CO oxidation efficiency and robustness.
  • The PtOx-TiO2 interfaces dynamically adapt during CO oxidation, optimizing reactant adsorption.
  • Electronic metal-support interactions activate lattice oxygen, enabling the Mars-van Krevelen pathway for low-temperature CO oxidation.

Conclusions:

  • The sunlight-driven synthesis offers a new paradigm for designing adaptive catalysts.
  • This strategy is extendable to other metal catalysts supported by metal oxides and perovskites.
  • The engineered interfaces provide high conversion efficiency for CO oxidation via an activated Mars-van Krevelen pathway.