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

Standard Electrode Potentials03:02

Standard Electrode Potentials

50.4K
On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
50.4K
Hydrogen Bonds00:26

Hydrogen Bonds

133.9K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
133.9K
Hydrogen Bonds01:04

Hydrogen Bonds

14.8K
A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
14.8K
Analyte Adsorption and Distribution01:09

Analyte Adsorption and Distribution

2.8K
In certain chromatographic separations, solutes transfer between the mobile phase and the stationary phase via sorption, which typically refers to the process of adsorption. For many chromatographic systems, the sorption process often depends on the polarity of the compounds—an expression of the overall dipole moment within the molecule. During the separation process, there is competition between the solute and solvent for adsorption to the stationary phase. Highly polar compounds and...
2.8K
Structure of Lipids03:38

Structure of Lipids

99.1K
Lipids include a diverse group of compounds that are largely nonpolar in nature. This is because they are hydrocarbons that include mostly nonpolar carbon-carbon or carbon-hydrogen bonds. Non-polar molecules are hydrophobic (“water fearing”), or insoluble in water. Lipids perform many different functions in a cell. Cells store energy for long-term use in the form of fats. Lipids also provide insulation from the environment for plants and animals. For example, they help keep aquatic...
99.1K
Protein and Protein Structure02:15

Protein and Protein Structure

88.2K
Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
A protein's shape is critical to its function. For example, an enzyme...
88.2K

You might also read

Related Articles

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

Sort by
Same author

Surface Electrochemistry of Au(111) in Acetonitrile Based Electrolytes: Formation of a Solvent Related Adsorbed Layer.

The journal of physical chemistry letters·2026
Same author

Cation-Surface Interactions During Electrocatalytic Hydrogen Evolution Probed by Surface X‑ray Diffraction.

ACS physical chemistry Au·2026
Same author

Assessing the potential of zero charge in ab initio molecular dynamics simulations.

The Journal of chemical physics·2026
Same author

Compensation effects between the apparent activation energy and pre-exponential factor in simple models of electrocatalytic hydrogen evolution.

Faraday discussions·2026
Same author

Dynamic CO Electrolysis to Methanol on Pt(111) Surfaces Modified with a Pd Monolayer.

ACS catalysis·2026
Same author

Modelling the Double Layer of Polycrystalline Electrodes: Capacitance, Potential of Zero Charge, and Parsons-Zobel Plot.

ACS electrochemistry·2026

Related Experiment Video

Updated: Feb 8, 2026

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
12:08

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes

Published on: June 24, 2022

4.1K

Hydrogen adsorption on nano-structured platinum electrodes.

Oscar Diaz-Morales1, Thomas J P Hersbach, Cansin Badan

  • 1Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands. m.koper@chem.leidenuniv.nl.

Faraday Discussions
|July 11, 2018
PubMed
Summary
This summary is machine-generated.

Researchers identified the source of a mysterious "third hydrogen peak" on platinum electrodes. This peak arises from surface-adsorbed hydrogen on a reconstructed (110) surface site, offering new insights into platinum electrode characterization.

More Related Videos

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

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

Published on: April 27, 2018

8.3K
On the Preparation and Testing of Fuel Cell Catalysts Using the Thin Film Rotating Disk Electrode Method
12:12

On the Preparation and Testing of Fuel Cell Catalysts Using the Thin Film Rotating Disk Electrode Method

Published on: March 16, 2018

22.9K

Related Experiment Videos

Last Updated: Feb 8, 2026

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
12:08

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes

Published on: June 24, 2022

4.1K
Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

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

Published on: April 27, 2018

8.3K
On the Preparation and Testing of Fuel Cell Catalysts Using the Thin Film Rotating Disk Electrode Method
12:12

On the Preparation and Testing of Fuel Cell Catalysts Using the Thin Film Rotating Disk Electrode Method

Published on: March 16, 2018

22.9K

Area of Science:

  • Electrochemistry
  • Surface Science
  • Materials Science

Background:

  • The hydrogen region of platinum electrodes is crucial for structural characterization.
  • Understanding has advanced, differentiating Pt(111) adsorption from step site interactions with hydroxyl and cations.

Purpose of the Study:

  • To elucidate the origin of the enigmatic "third hydrogen peak" observed in specific platinum electrode conditions.
  • To investigate the nature of hydrogen adsorption and surface site interactions contributing to this peak.

Main Methods:

  • Electrochemical analysis of platinum electrodes under varying hydrogen concentrations and oxidative treatments.
  • Characterization of platinum surfaces with high (110) step density and oxidatively roughened surfaces.

Main Results:

  • Evidence suggests the third hydrogen peak originates from surface-adsorbed hydrogen, not subsurface hydrogen.
  • The peak is associated with a locally reconstructed (110)-type surface site.
  • This specific site is unstable upon oxidative removal of hydrogen, and its cation sensitivity differs from other step-related peaks.

Conclusions:

  • The third hydrogen peak is attributed to surface hydrogen on a reconstructed (110) site.
  • The distinct cation sensitivity implies unique chemistry compared to other hydrogen region features.
  • This finding refines the structural characterization capabilities of the hydrogen region on platinum electrodes.