Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Factors Affecting Dissolution: Polymorphism, Amorphism and Pseudopolymorphism01:21

Factors Affecting Dissolution: Polymorphism, Amorphism and Pseudopolymorphism

749
Polymorphism refers to the existence of a drug substance in multiple crystalline forms, known as polymorphs. Recently, this term has been expanded to include solvates (forms containing a solvent), amorphous forms (non-crystalline forms), and desolvated solvates (forms from which the solvent has been removed).
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
749
Protection of Alcohols02:31

Protection of Alcohols

8.1K
This lesson delves into the concept of protection and deprotection of a functional group fundamental to synthetic organic chemistry. These phenomena are explained in the context of aliphatic and aromatic alcohols.
Protection
It defines a protecting group as the masking agent to make the more reactive species inert to a given set of conditions. This concept is depicted via the illustration of liquid flow through different outlets in an assembly of pipes. The analogy helps to understand the role...
8.1K
Zones of Protection01:16

Zones of Protection

812
In power systems, the entire setup is divided into protective zones to isolate faults and protect the rest of the network. These zones include generators, transformers, buses, transmission lines, distribution lines, and motors. Each zone can be visualized as a separate room in a house, with each room protected by its own circuit breaker.
Protective zones are defined by closed dashed lines, containing one or more components. A key characteristic of these zones is the strategic placement of...
812
Protecting Self-Esteem01:27

Protecting Self-Esteem

234
Self-esteem, a central component of psychological well-being, is actively maintained through various cognitive and behavioral strategies. Individuals employ specific mechanisms to preserve a positive self-concept and mitigate threats to their self-worth, particularly in contexts involving social evaluation or personal feedback. Four primary techniques are commonly used to sustain self-esteem.Manipulating AppraisalsOne prominent strategy involves manipulating appraisals from others. Individuals...
234
Radial System Protection01:23

Radial System Protection

447
Radial systems employ time-delay overcurrent relays to reduce load interruptions. When a fault occurs, the nearest breaker opens first, while upstream breakers remain closed due to longer delay settings. This approach ensures minimal disruption to the rest of the system.
In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...
447
Dehydration Synthesis01:15

Dehydration Synthesis

150.5K
Overview
Dehydration synthesis (also called a condensation reaction) is the chemical process in which two molecules covalently link together to form a new molecule, along with the release of a water molecule. Many physiologically important compounds form by dehydration synthesis reactions, such as complex carbohydrates, proteins, DNA, and RNA.
Synthesis of carbohydrates
Sugar molecules are covalently linked together by dehydration synthesis. During the reaction, the hydroxyl (-OH) group from...
150.5K

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Prepatterned Superconducting Contacts for Clean Superconductor-Topological Material Interfaces Enabling Long-Range Josephson Coupling.

Nano letters·2026
Same author

Integrated catalyst-transport nickel-iron porous electrode for anion exchange membrane water electrolysis.

Nature communications·2026
Same author

A digestive cartridge reduces intestinal injury in a murine model of necrotizing enterocolitis.

PloS one·2026
Same author

Vacancy-Induced Z-Contrast Anomaly in Self-Assembled (Ti,V)O<sub>2</sub> Heterostructure.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

Strain and Defect-Tailored Magnetotransport in NiCo<sub>2</sub>O<sub>4</sub> Thin Films and Freestanding Membranes.

ACS nano·2026
Same author

Significant stability enhancement in photocatalytic CO<sub>2</sub> reduction via flow-driven strategies.

Nature communications·2026
Same journal

A pH-Tolerant Nickel-Vanadium Phosphonate Framework for Stable Aqueous Supercapacitor Cycling.

ACS nano·2026
Same journal

Reconfigurable Photoelectric Coaxial Fiber-Based Memristors for Neuromorphic Computing.

ACS nano·2026
Same journal

Multidimensional Emission Control of CsPbI<sub>3</sub> Quantum Dots Using Plasmonic Quasi-Bound States in the Continuum.

ACS nano·2026
Same journal

Reconfigurable 2D Floating-Gate Field-Effect Transistors with Graphene-Induced Interfacial Polarization for Unified Memory-Logic Integration.

ACS nano·2026
Same journal

Bioinstructive Hybrid Scaffold Integrating Phosphoinositide 3-Kinase-Akt and Complementary Survival Pathways for Kidney Regeneration.

ACS nano·2026
Same journal

Robust Quantum Cutting via Halide-Bearing Ligand Passivation and Gradient Halide Reconstruction for Ultrabroadband Ultraviolet-to-Near-Infrared Photodetection and Imaging.

ACS nano·2026
Ver todos los artículos relacionados

Video Experimental Relacionado

Updated: Feb 12, 2026

Author Spotlight: Designing Sustainable Nanomaterials for Advancing Synthesis and Element Mixing
03:54

Author Spotlight: Designing Sustainable Nanomaterials for Advancing Synthesis and Element Mixing

Published on: March 15, 2024

1.4K

Amorfización de la superficie protectora que permite la síntesis de aleación Pt electrocatalítica.

Byeong Su Gu1,2, Soumen Dutta1,2, Yu-Rim Hong1,2

  • 1Center for Nanospace-Confined Chemical Reactions (NCCR), Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea.

ACS nano
|February 10, 2026
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores desarrollaron un nuevo método para crear pieles de aleación amorfa en nanodendritas de platino, aumentando significativamente su actividad catalítica para reacciones como la oxidación del etanol.

Palabras clave:
La nanoestructura 2D es una nanoestructura en 2D.Las aleaciones Pt son aleaciones de Pt.electrocatalizador es el catalizador eléctrico.Oxidación por oxidación del etanol.amorfización de las superficies.

Más Videos Relacionados

Plasma Polishing as a New Polishing Option to Reduce the Surface Roughness of Porous Titanium Alloy for 3D Printing
06:12

Plasma Polishing as a New Polishing Option to Reduce the Surface Roughness of Porous Titanium Alloy for 3D Printing

Published on: April 28, 2023

2.4K
Synthesis of Substrate-Bound Au Nanowires Via an Active Surface Growth Mechanism
09:36

Synthesis of Substrate-Bound Au Nanowires Via an Active Surface Growth Mechanism

Published on: July 18, 2018

8.3K

Videos de Experimentos Relacionados

Last Updated: Feb 12, 2026

Author Spotlight: Designing Sustainable Nanomaterials for Advancing Synthesis and Element Mixing
03:54

Author Spotlight: Designing Sustainable Nanomaterials for Advancing Synthesis and Element Mixing

Published on: March 15, 2024

1.4K
Plasma Polishing as a New Polishing Option to Reduce the Surface Roughness of Porous Titanium Alloy for 3D Printing
06:12

Plasma Polishing as a New Polishing Option to Reduce the Surface Roughness of Porous Titanium Alloy for 3D Printing

Published on: April 28, 2023

2.4K
Synthesis of Substrate-Bound Au Nanowires Via an Active Surface Growth Mechanism
09:36

Synthesis of Substrate-Bound Au Nanowires Via an Active Surface Growth Mechanism

Published on: July 18, 2018

8.3K

Área de la Ciencia:

  • Ciencia de los materiales Ciencia de los materiales.
  • Nanotecnología La nanotecnología es la nanotecnología.
  • La catálisis de la catálisis.

Sus antecedentes:

  • El desarrollo de catalizadores eficientes es crucial para varios procesos químicos.
  • Los nanomateriales 2D ultrafinos ofrecen una gran superficie, pero pueden ser inestables.
  • El control de la estructura de la superficie es clave para mejorar el rendimiento catalítico.

Objetivo del estudio:

  • Desarrollar una nueva estrategia de amorfización específica de la superficie para nanodendritas de platino 2D ultradelgadas (2D-PtNDs).
  • Diseñar aleaciones superficiales conformes de platino-metal (Pt-M) con propiedades catalíticas mejoradas.
  • Establecer un método escalable para crear pieles de aleación amorfa en catalizadores de metales nobles.

Principales métodos:

  • Utilizando una estrategia de confinamiento de nanopartículas de sílice para proteger 2D-PtNDs durante la modificación de la superficie.
  • Empleando un tratamiento de borohidruro de sodio (NaBH4) para inducir la amorfización específica de la superficie.
  • Investigando el intercambio redox fuera de equilibrio (aleación antigalvánica) para la incorporación de iones metálicos secundarios (Pd, Ag, Au, Ru).

Principales resultados:

  • Se logró una amorfización específica de la superficie, creando un Pt amorfo.
  • La piel la piel la piel la piel.
  • rico en sitios de alta energía.
  • Sintetizó con éxito aleaciones superficiales conformes Pt-M con composiciones sintonizables en 2D-PtNDs.
  • Demostró una actividad electrocatalítica significativamente mejorada para la oxidación del etanol, logrando una eficiencia Faradaic de ~89% para el CO2 y un orden de magnitud mayor de actividad de masa que el Pt/C comercial.
  • Se demostró que la aleación de Ag duplicó la actividad catalítica de los sustratos de platino a granel.

Conclusiones:

  • La estrategia de la nanopartícula de sílice permite la amorfización superficial controlada y la formación de aleaciones sin colapso estructural.
  • Las pieles de aleación amorfa diseñadas proporcionan una reactividad extraordinaria y un rendimiento catalítico mejorado.
  • Este trabajo presenta una ruta general y escalable para crear catalizadores avanzados de metales nobles con aleaciones de superficie amorfa para mejorar la catálisis.