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

Hess's Law03:40

Hess's Law

44.3K
There are two ways to determine the amount of heat involved in a chemical change: measure it experimentally, or calculate it from other experimentally determined enthalpy changes. Some reactions are difficult, if not impossible, to investigate and make accurate measurements for experimentally. And even when a reaction is not hard to perform or measure, it is convenient to be able to determine the heat involved in a reaction without having to perform an experiment.
44.3K
Catalytically Perfect Enzymes01:07

Catalytically Perfect Enzymes

3.8K
The theory of catalytically perfect enzymes was first proposed by W.J. Albery and J. R. Knowles in 1976. These enzymes catalyze biochemical reactions at high-speed. Their catalytic efficiency values range from 108-109 M-1s-1. These enzymes are also called 'diffusion-controlled' as the only rate-limiting step in the catalysis is that of the substrate diffusion into the active site. Examples include triose phosphate isomerase, fumarase, and superoxide dismutase.
 
Most enzymes...
3.8K
Henderson-Hasselbalch Equation02:48

Henderson-Hasselbalch Equation

68.0K
The ionization-constant expression for a solution of a weak acid can be written as:
68.0K
Enthalpy02:59

Enthalpy

34.6K
Chemists ordinarily use a property known as enthalpy (H) to describe the thermodynamics of chemical and physical processes. Enthalpy is defined as the sum of a system’s internal energy (E) and the mathematical product of its pressure (P) and volume (V):
34.6K
Hazard Ratio01:12

Hazard Ratio

72
The hazard ratio (HR) is a widely used measure in clinical trials to compare the risk of events, such as death or disease recurrence, between two groups over time. It reflects the ratio of hazard rates—the instantaneous risk of the event occurring—between a treatment group and a control group. This measure provides valuable insights into the relative effectiveness of a treatment by assessing how the risk of an event differs between the two groups.
For example, in a clinical trial...
72
Energy Line and Hydraulic Gradient Line01:27

Energy Line and Hydraulic Gradient Line

578
Based on Bernoulli's equation, the energy line (EL) and hydraulic grade line (HGL) provide graphical representations of energy distribution in a fluid flow system. For steady, incompressible, inviscid flows, Bernoulli's equation is expressed as:
578

You might also read

Related Articles

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

Sort by
Same author

Multistage nanomedicine engineering to overcome sequential barriers to glioblastoma treatment: a review.

Journal of nanobiotechnology·2026
Same author

Unveiling a Hidden Conversion Pathway in CoSe<sub>2</sub> Anodes via Rationally Designed CNT-Interwoven Hollow Carbon Microclusters for High-Performance Potassium-Ion Batteries.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Cross-material catalyst discovery via deep learning.

Nature materials·2026
Same author

Insights Into Atomic Ordering and Morphological Control Integration Design for Next-Generation Proton Exchange Membrane Fuel Cells.

ChemSusChem·2026
Same author

Tailored Bond Heterogeneity through High-Entropy Doping for Efficient Acidic Water Oxidation.

Journal of the American Chemical Society·2026
Same author

Incidence of Bacille Calmette-Guérin associated lymphadenitis in healthy children: A systematic review and meta-analysis.

Human vaccines & immunotherapeutics·2026
Same journal

Amorphous High-Entropy Oxides With High-Valent Metal and Oxygen-Vacancy Pairs for Thermally Stable Catalytic Oxidation.

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

H<sub>2</sub>S Self-Supplied Micelles Reverse Tumor-Immune Effector Cells Energy Metabolisms to Boost Breast Cancer Immunotherapy With Microenvironment Normalization.

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

Feed-Draw Printing Enables Monolithically Integrated Flexible Sensors With High Interfacial Toughness and Wide Linear Range.

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

Space-Time Coding Conformal Metasurfaces for Multifrequency Beam Steering and Shaping.

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

3D Printing of Magnetic Soft Materials for Functional Structures and Devices.

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

Photothermal-Activable Artificial Macrophage With Amplified Systemic Antibacterial Responses to Combat Primary and Secondary Infection.

Advanced materials (Deerfield Beach, Fla.)·2026
See all related articles

Related Experiment Video

Updated: May 21, 2025

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump
09:04

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

Published on: June 1, 2022

3.0K

Efficient H2O2 Electrosynthesis in Acidic media via Multiscale Catalyst Optimization.

Jaehyuk Shim1,2,3, Jaewoo Lee1,2, Heejong Shin4

  • 1Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul, 08826, Republic of Korea.

Advanced Materials (Deerfield Beach, Fla.)
|March 18, 2025
PubMed
Summary
This summary is machine-generated.

This study presents a novel cobalt catalyst for efficient electrochemical hydrogen peroxide (H2O2) production. The new catalyst achieves high efficiency and stability in acidic conditions, offering a sustainable alternative.

Keywords:
H2O2 treatmenthydrogen peroxide productioninner‐sphere electron transfer pathwaymulti‐level tuning strategyoctahedron‐like cobalt structure

More Related Videos

A Protocol for Housing Mice in an Enriched Environment
09:30

A Protocol for Housing Mice in an Enriched Environment

Published on: June 8, 2015

18.2K
Lentiviral Mediated Delivery of shRNAs to hESCs and NPCs Using Low-cost Cationic Polymer Polyethylenimine PEI
06:49

Lentiviral Mediated Delivery of shRNAs to hESCs and NPCs Using Low-cost Cationic Polymer Polyethylenimine PEI

Published on: May 24, 2022

2.3K

Related Experiment Videos

Last Updated: May 21, 2025

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump
09:04

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump

Published on: June 1, 2022

3.0K
A Protocol for Housing Mice in an Enriched Environment
09:30

A Protocol for Housing Mice in an Enriched Environment

Published on: June 8, 2015

18.2K
Lentiviral Mediated Delivery of shRNAs to hESCs and NPCs Using Low-cost Cationic Polymer Polyethylenimine PEI
06:49

Lentiviral Mediated Delivery of shRNAs to hESCs and NPCs Using Low-cost Cationic Polymer Polyethylenimine PEI

Published on: May 24, 2022

2.3K

Area of Science:

  • Electrochemistry
  • Materials Science
  • Chemical Engineering

Background:

  • Electrochemical hydrogen peroxide (H2O2) production is a sustainable alternative to the anthraquinone process.
  • H2O2 stability and efficiency are challenges in alkaline and neutral electrolytes.
  • Acidic electrolytes offer stability but face kinetic limitations in oxygen reduction.

Purpose of the Study:

  • To develop an efficient and stable electrochemical H2O2 production method in acidic electrolytes.
  • To overcome kinetic limitations of the oxygen reduction reaction in acidic media.
  • To design a catalyst with enhanced active sites and macrostructure.

Main Methods:

  • Utilized a multiscale approach combining active site and macrostructure tuning.
  • Synthesized an octahedron-like cobalt structure on interconnected hierarchical porous nanofibers.
  • Evaluated catalyst performance using electrochemical techniques at industrial-relevant current densities.

Main Results:

  • Achieved a faradaic efficiency exceeding 80% at 400 mA cm-2.
  • Demonstrated stable operation for over 120 hours at 100 mA cm-2.
  • Obtained a 26% energy efficiency at 300 mA cm-2 with a cell potential of 2.14 V.

Conclusions:

  • The developed cobalt catalyst significantly enhances H2O2 production efficiency and stability in acidic media.
  • The multiscale tuning approach is effective for optimizing electrocatalyst performance.
  • This work paves the way for scalable and cost-effective electrochemical H2O2 synthesis.