Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Catalysis02:50

Catalysis

27.6K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
27.6K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Tuning Solid Electrolyte Interphase Formation before Plating Onset in Anode-Free Sodium Batteries.

JACS Au·2026
Same author

A MOOC-based and high-fidelity surgical simulation-integrated clinical internship mode in optometry teaching for ophthalmology graduate students.

BMC medical education·2026
Same author

Accelerating Hierarchical ZSM‑5 Engineering via Bayesian Optimization-Guided Discovery.

ACS materials Au·2026
Same author

Specific ion effects on ion transport in charged polymer membranes.

Science advances·2026
Same author

Nitrogen fixation in a non-equilibrium spatially distributed electric field.

Nature communications·2026
Same author

Tailoring Reconstruction of Co/Cu Mixed Oxide-Derived Tandem Electrocatalysts via <i>In Situ</i> Electrochemical Dissolution-Redeposition for Enhanced Nitrate-to-Ammonia Conversion.

JACS Au·2026

Related Experiment Video

Updated: Sep 13, 2025

Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids
07:14

Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids

Published on: August 23, 2018

9.2K

Distinctive Kinetic Signatures of Surface Segregation Processes in Bimetallic Nanoparticle Catalysis.

Rong Ye1,2, Samiha Bhat1,2, Jared R Arkfeld1,2

  • 1Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, United States.

Journal of the American Chemical Society
|July 25, 2025
PubMed
Summary

Surface segregation in bimetallic catalysts like PtCu alters active sites and kinetics. Temperature changes can reverse this, impacting catalyst performance and activation energy in unique ways.

More Related Videos

Author Spotlight: Tracking Electrochemistry on Single Nanoparticles with Surface-Enhanced Raman Scattering Spectroscopy and Microscopy
10:59

Author Spotlight: Tracking Electrochemistry on Single Nanoparticles with Surface-Enhanced Raman Scattering Spectroscopy and Microscopy

Published on: May 12, 2023

2.9K
Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles
07:47

Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles

Published on: November 27, 2015

11.0K

Related Experiment Videos

Last Updated: Sep 13, 2025

Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids
07:14

Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids

Published on: August 23, 2018

9.2K
Author Spotlight: Tracking Electrochemistry on Single Nanoparticles with Surface-Enhanced Raman Scattering Spectroscopy and Microscopy
10:59

Author Spotlight: Tracking Electrochemistry on Single Nanoparticles with Surface-Enhanced Raman Scattering Spectroscopy and Microscopy

Published on: May 12, 2023

2.9K
Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles
07:47

Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles

Published on: November 27, 2015

11.0K

Area of Science:

  • Catalysis
  • Materials Science
  • Surface Chemistry

Background:

  • Surface segregation in bimetallic catalysts affects active site distribution and catalytic performance.
  • The influence of reaction-condition-driven surface segregation on reaction kinetics is not well understood.

Purpose of the Study:

  • To investigate the impact of temperature-dependent, oxygen-induced surface segregation on the kinetics of CO oxidation on bimetallic PtCu nanoparticles.
  • To establish a link between dynamic surface restructuring and macroscopic kinetics in bimetallic systems.

Main Methods:

  • Kinetic studies of CO oxidation on PtCu nanoparticles.
  • In situ infrared spectroscopy.
  • Density functional theory (DFT) calculations.
  • Microkinetic modeling.

Main Results:

  • Temperature-dependent, oxygen-induced surface segregation of Cu in PtCu nanoparticles leads to reversible changes in Pt surface site concentration and coordination.
  • An increase in apparent activation energy was observed at higher temperatures, contrasting with pure metal behavior.
  • Kinetic trends indicating surface segregation were observed in PtCo but not in PtRu alloys, suggesting atypical kinetic variations as indicators.

Conclusions:

  • Dynamic surface restructuring through segregation directly influences macroscopic kinetics in bimetallic catalysts.
  • Atypical variations in kinetic parameters can serve as indicators of surface segregation in bimetallic systems.