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Related Concept Videos

Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
Heterogeneous Catalysis01:22

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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Electrochemistry is the branch of chemistry that studies the relationship between electrical quantities and chemical reactions, particularly oxidation and reduction. Oxidation is the loss of electrons from a substance, whereas reduction refers to the gain of electrons. A substance with a strong electron affinity is called an oxidizing agent (oxidant), and a reducing agent (reductant) is a species that donates electrons. Oxidation and reduction processes are pivotal to electrochemical reactions,...
Oxidative Cleavage of Alkenes: Ozonolysis01:46

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Oxidation-Reduction Reactions

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Related Experiment Video

Updated: May 16, 2026

Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts
10:15

Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts

Published on: November 7, 2025

Trace Ru-Doped PtCuRu@PtRu Core-Shell Electrocatalyst for CO-Resilient Methanol Oxidation.

Tianrui Xue1, Shiyue Xing1, Zhongliang Liu1

  • 1Key Laboratory for Ultrafine Materials of Ministry of Education, School of Chemical Engineering, East China University of Science and Technology, Shanghai, P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|May 15, 2026
PubMed
Summary
This summary is machine-generated.

A novel core-shell electrocatalyst enhances methanol oxidation reaction (MOR) activity and durability. This advanced catalyst design prevents metal dissolution and boosts efficiency for fuel cell applications.

Keywords:
anti‐CO poisoningbifunctional mechanismcore‐shell structuremethanol oxidation reaction

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Catalysis

Background:

  • Platinum-based catalysts are crucial for methanol oxidation reaction (MOR) in fuel cells.
  • Challenges include limited water dissociation and transition metal dissolution, reducing catalyst performance and lifespan.

Purpose of the Study:

  • To develop a Pt-based core-shell electrocatalyst that overcomes limitations in water dissociation and metal dissolution for enhanced MOR.
  • To improve both the activity and durability of catalysts for fuel cell applications.

Main Methods:

  • Synthesis of a PtCuRu-0.05@PtRu core-shell electrocatalyst using liquid-phase reduction and in-situ electrochemical dealloying.
  • Characterization of catalyst structure, composition, and electrochemical performance for MOR.

Main Results:

  • The PtCuRu-0.05@PtRu catalyst demonstrated a mass activity of 1.208 A mgPt⁻¹, significantly outperforming commercial Pt/C and PtCu@Pt.
  • Exceptional durability was observed, with minimal activity decay after extensive testing and preserved structural integrity.

Conclusions:

  • The synergistic effects of Ru doping, compressive strain, and a protective Pt-rich shell effectively enhance MOR activity and durability.
  • This core-shell catalyst design offers a promising strategy for advancing fuel cell technology by addressing key performance bottlenecks.