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Related Experiment Video

Updated: Jul 8, 2026

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

Bifunctional electrocatalysis in pt-ru nanoparticle systems.

C Roth¹, N Benker, R Theissmann

¹Department of Chemistry, The University of Liverpool, Liverpool, L69 7ZD, United Kingdom. c_roth@tu-darmstadt.de

Langmuir : the ACS Journal of Surfaces and Colloids

|January 24, 2008

Summary

This summary is machine-generated.

Platinum-Ruthenium (Pt-Ru) alloys are key electrocatalysts for fuel cells. This study introduces nanoparticulate model systems to better understand their CO tolerance and methanol oxidation mechanisms.

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Last Updated: Jul 8, 2026

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

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Probing Surface Electrochemical Activity of Nanomaterials using a Hybrid Atomic Force Microscope-Scanning Electrochemical Microscope (AFM-SECM)

Published on: February 10, 2021

Area of Science:

Electrochemistry
Materials Science
Catalysis

Background:

Platinum-Ruthenium (Pt-Ru) alloys are vital electrocatalysts for fuel cell anodes, particularly for reformate and methanol oxidation.
The enhanced carbon monoxide (CO) tolerance of these alloys is attributed to ligand and bifunctional mechanisms, which remain incompletely understood.
Existing research often bridges the gap between idealized single crystals and complex practical catalysts.

Purpose of the Study:

To develop and characterize novel nanoparticulate model systems of Pt and Ru.
To investigate the electrocatalytic activity and CO tolerance of these model systems for methanol oxidation.
To elucidate the specific contributions of Pt, Ru, and their contact regions to the bifunctional mechanism.

Main Methods:

Preparation of nanoparticulate model systems by combining ligand-stabilized and spontaneously deposited Pt and Ru nanoparticles on an oxidized glassy carbon electrode.
Electrochemical characterization using cyclic voltammetry to study CO and methanol oxidation.
Deconvolution of cyclic voltammograms to quantify contributions from Pt, Ru, and Pt-Ru interfaces.
Scanning transmission electron microscopy (STEM) to confirm nanoparticle proximity and distribution.

Main Results:

The prepared Pt-Ru nanoparticulate electrodes exhibited distinct voltammetric responses for CO and methanol oxidation.
Quantitative analysis revealed specific contributions of Pt-Ru contact regions to the bifunctional mechanism.
STEM confirmed the close proximity of Pt and Ru nanoparticles in the synthesized model systems.

Conclusions:

The developed nanoparticulate model systems provide a valuable platform for studying the fundamental mechanisms of Pt-Ru electrocatalysts.
The findings offer a deeper understanding of the synergistic effects and the bifunctional mechanism in Pt-Ru alloys for fuel cell applications.
This approach bridges the gap between fundamental studies and practical catalyst design for improved fuel cell performance.