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

30.1K
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.
30.1K
Catalytic Reactor: Hydrogenation of Ethylene08:56

Catalytic Reactor: Hydrogenation of Ethylene

31.4K
Source: Kerry M. Dooley and Michael G. Benton, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA
The hydrogenation of ethylene (C2H4) to ethane (C2H6) has often been studied as a model reduction reaction in characterizing new metal catalysts.1-2 While supported nickel is not the most active metal catalyst for this reaction, it is active enough that reaction can take place at < 200°C.
The reaction typically involves adsorbed, dissociated hydrogen (H2)...
31.4K
Hydrogenation06:06

Hydrogenation

51.7K
Source: Vy M. Dong and Zhiwei Chen, Department of Chemistry, University of California, Irvine, CA
This experiment will demonstrate the hydrogenation of chalcone as an example of an alkene hydrogenation reaction (Figure 1). In this experiment, palladium on carbon (Pd/C) will be used as a heterogeneous catalyst for the process. A balloon will be used to supply the hydrogen atmosphere.
51.7K
Hydrogen Bonds00:26

Hydrogen Bonds

131.2K
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....
131.2K
Hydrogen Bonds01:04

Hydrogen Bonds

13.3K
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...
13.3K
Experimental Methods for Efficient Solar Hydrogen Production in Microgravity Environment11:38

Experimental Methods for Efficient Solar Hydrogen Production in Microgravity Environment

8.1K
Efficient solar-hydrogen production has recently been realized on functionalized semiconductor-electrocatalyst systems in a photoelectrochemical half-cell in microgravity environment at the Bremen Drop Tower. Here, we report the experimental procedures for manufacturing the semiconductor-electrocatalyst device, details of the experimental set-up in the drop capsule and the experimental sequence during free...
8.1K

You might also read

Related Articles

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

Sort by
Same author

Quinoxaline Terpolymer-Controlled Miscibility With Oligomeric Acceptors for Over 20% Efficiency, Highly Stable and Stretchable Polymer Solar Cells.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Boosting Photocatalytic Overall Water Splitting Activity of Phosphorene Through Five-Coordinate Passivation Enabled by Carbene Addition.

Angewandte Chemie (International ed. in English)·2026
Same author

Potential Benefits and Harms of Screening Strategies for Monoclonal Gammopathy of Undetermined Significance in the US: A Simulation Study.

Clinical lymphoma, myeloma & leukemia·2026
Same author

Ternary Strategy Enables 18.16% Efficiency in All-Small-Molecule Organic Solar Cells with Improved Fill Factor and Reduced Voltage Loss.

ACS applied materials & interfaces·2026
Same author

Short-Wave Infrared Organic Photodetectors With Ultralow Dark Current Density Under Biased Operating Conditions.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Photocatalytic Hydrogen Cycling via Benzotrithiophene-Based Mesoporous Covalent Organic Frameworks for Efficient Fine Chemical Coproduction.

Journal of the American Chemical Society·2026
Same journal

Large-scale discovery and annotation of substructure patterns in mass spectrometry profiles.

Nature communications·2026
Same journal

Salmonella SopB suppresses post-transcriptionally regulated cytokine release to reduce early tissue inflammation and delay disease progression.

Nature communications·2026
Same journal

A human-specific microRNA controls the timing of excitatory synaptogenesis.

Nature communications·2026
Same journal

An HMA-like integrated domain in the wheat tandem kinase WTK4 recognises an RNase-like pathogen effector.

Nature communications·2026
Same journal

Learning regularities in noise engages both neural predictive activity and representational changes.

Nature communications·2026
Same journal

The H3K4 methyltransferase KMT2D is an essential cofactor for GATA1 at erythroid gene enhancers.

Nature communications·2026
See all related articles

Related Experiment Video

Updated: Jan 19, 2026

Heterogeneous Catalytic Reactor and Hydrogenation of Ethylene
08:56

Heterogeneous Catalytic Reactor and Hydrogenation of Ethylene

Published on: April 30, 2023

31.4K

Balancing hydrogen adsorption/desorption by orbital modulation for efficient hydrogen evolution catalysis.

Feng Li1, Gao-Feng Han1, Hyuk-Jun Noh1

  • 1School of Energy and Chemical Engineering/Center for Dimension-Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST, Ulsan, 44919, South Korea.

Nature Communications
|September 8, 2019
PubMed
Summary
This summary is machine-generated.

Balancing hydrogen adsorption and desorption via orbital modulation with carbon/nitrogen atoms significantly enhances the hydrogen evolution reaction (HER) catalysis. This novel approach boosts catalyst performance, outperforming existing standards.

More Related Videos

Catalysis: Homogenious and Heterogeneous Catalysis
02:50

Catalysis: Homogenious and Heterogeneous Catalysis

30.1K
Catalytic Hydrogenation of Alkene: Applications in Chemistry
06:06

Catalytic Hydrogenation of Alkene: Applications in Chemistry

Published on: April 30, 2023

51.7K

Related Experiment Videos

Last Updated: Jan 19, 2026

Heterogeneous Catalytic Reactor and Hydrogenation of Ethylene
08:56

Heterogeneous Catalytic Reactor and Hydrogenation of Ethylene

Published on: April 30, 2023

31.4K
Catalysis: Homogenious and Heterogeneous Catalysis
02:50

Catalysis: Homogenious and Heterogeneous Catalysis

30.1K
Catalytic Hydrogenation of Alkene: Applications in Chemistry
06:06

Catalytic Hydrogenation of Alkene: Applications in Chemistry

Published on: April 30, 2023

51.7K

Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Hydrogen adsorption/desorption dynamics are critical for hydrogen evolution reaction (HER) efficiency.
  • Optimizing the balance between hydrogen adsorption and desorption is key to accelerating HER catalysis.

Purpose of the Study:

  • To rationally balance hydrogen adsorption/desorption through orbital modulation.
  • To enhance hydrogen evolution reaction (HER) performance using electronegative carbon/nitrogen (C/N) atoms.

Main Methods:

  • Theoretical calculations to investigate orbital interactions between C/N atoms and iridium (Ir) sites.
  • Synthesis of iridium nanoparticles anchored in nitrogenated carbon matrixes.

Main Results:

  • Orbital modulation by C/N atoms reduces the empty d orbitals of Ir sites, balancing hydrogen adsorption/desorption.
  • The catalyst achieved an exceptionally low overpotential (4.5 mV at 10 mA cm⁻²) and high mass activity (1.12 A mgIr⁻¹).
  • Performance surpassed that of bare Ir nanoparticles and commercial Pt/C catalysts.

Conclusions:

  • Orbital modulation via C/N doping offers an effective strategy for enhancing HER electrocatalysts.
  • The developed catalyst demonstrates superior efficiency for hydrogen production.