Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Controlled-Potential Coulometry: Electrolytic Methods

Controlled-Potential Coulometry: Electrolytic Methods

Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...

You might also read

Related Articles

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

Sort by

Same author

Iterative Interaction Fingerprints-Guided Multiobjective Molecular Generation.

Journal of chemical information and modeling·2026

Same author

Aging at Home: Concerns of Community-Dwelling Older People and Their Interest in Seeking Local Resources and Services.

Canadian journal on aging = La revue canadienne du vieillissement·2026

Same author

A Dyadic Study of Lived Experiences of Family Stress, Emotional Distress and Family Resilience Among Women With Cancer During Pregnancy and Their Partners.

Seminars in oncology nursing·2026

Same author

Plasmid-borne transcriptional regulator RamAp modulates <i>Salmonella</i> genes for environmental and host adaptation.

Frontiers in microbiology·2026

Same author

Effectiveness of a Web-Based Communication Education Program in Improving Knowledge and Self-Efficacy in Family Caregivers of Nursing Home Residents: A Quasi-Experimental Study.

The journal of nursing research : JNR·2026

Same author

Freestanding Flexible Vortex Tubes Integrated With Ferroelectric Transistor.

Advanced materials (Deerfield Beach, Fla.)·2026

Search research articles

Related Experiment Video

Updated: Jan 9, 2026

Precise Electrochemical Sizing of Individual Electro-Inactive Particles

Precise Electrochemical Sizing of Individual Electro-Inactive Particles

Published on: August 4, 2023

Buried electrostatic modulation enables size-dependent reactivity in Pd-based nanocatalysts.

Tzu-An Chou¹, Hsiang-Yu Yu¹, Hui-Yun Lo¹

¹Department of Chemistry, National Cheng Kung University Tainan 70101 Taiwan wuhsinlun@mail.ncku.edu.tw.

Chemical Science

|December 4, 2025

Summary

Metal nanocatalyst reactivity surprisingly persists beyond 30 nm for gold (Au) but not palladium (Pd) cubes. This size-dependent catalysis is tuned by electrostatic interactions, not just surface chemistry, offering new design principles.

More Related Videos

A Continuous-flow Photocatalytic Reactor for the Precisely Controlled Deposition of Metallic Nanoparticles

A Continuous-flow Photocatalytic Reactor for the Precisely Controlled Deposition of Metallic Nanoparticles

Published on: April 10, 2019

Fine-tuning the Size and Minimizing the Noise of Solid-state Nanopores

Fine-tuning the Size and Minimizing the Noise of Solid-state Nanopores

Published on: October 31, 2013

Related Experiment Videos

Last Updated: Jan 9, 2026

Precise Electrochemical Sizing of Individual Electro-Inactive Particles

Precise Electrochemical Sizing of Individual Electro-Inactive Particles

Published on: August 4, 2023

A Continuous-flow Photocatalytic Reactor for the Precisely Controlled Deposition of Metallic Nanoparticles

A Continuous-flow Photocatalytic Reactor for the Precisely Controlled Deposition of Metallic Nanoparticles

Published on: April 10, 2019

Fine-tuning the Size and Minimizing the Noise of Solid-state Nanopores

Fine-tuning the Size and Minimizing the Noise of Solid-state Nanopores

Published on: October 31, 2013

Area of Science:

Nanocatalysis
Materials Science
Surface Chemistry

Background:

Catalytic reactivity of metal nanocatalysts typically plateaus as size increases due to bulk property convergence.
Electronic structure, particularly the Fermi level (E_F), is crucial for understanding nanocatalyst behavior.

Purpose of the Study:

To investigate the size-dependent catalytic reactivity of gold (Au) and palladium (Pd) nanocubes above 30 nm.
To elucidate the underlying electronic principles governing the observed reactivity differences between Au and Pd nanocatalysts.
To design and demonstrate a novel nanocatalyst architecture for tunable catalysis.

Main Methods:

Synthesis of Au and Pd nanocubes of varying sizes.
Catalytic performance evaluation under different conditions.
Analysis of electronic structure and surface charge interactions.
Design and characterization of Au-Pd core-shell nanocubes.

Main Results:

Au nanocubes exhibit switchable, size-dependent catalytic reactivity even above 30 nm, unlike size-invariant Pd nanocubes.
Au's sp-electron dominance allows strong Fermi level (E_F) responsiveness to surface charge, while Pd's d-states buffer these changes.
Au-Pd core-shell nanocubes demonstrate reversible, size-dependent catalytic modulation via electrostatic control from the Au core.

Conclusions:

Fermi level (E_F) responsiveness to transient surface charge is a key principle for tunable nanocatalysis, especially in larger nanocrystals.
Au-Pd core-shell nanostructures offer a new platform for electrostatic control in catalysis, enabling unprecedented reactivity modulation.
This work challenges traditional views by highlighting electrostatic effects over d-band energetics or surface coordination for charge- and size-tunable catalysis.