Ultrafine Nanowires As Highly Efficient Electrocatalysts
- Technology Benefits
- • Record high utilization efficiencyo Highest electrochemical active surface areao High specific activity• Stability using multiple-point contacts with carbon supporto No migration and aggregation during charge cycling• Possible more efficient charge transport and collection• Possible acceleration of the reaction speed the Pt catalyst is responsible for
- Technology Application
- • Electrocatalysts for different reactions:o Oxygen reduction reaction (for fuel cells, air batteries)o Oxygen evolution reaction and hydrogen evolution reactions (for water splitting or hydrogen generation)o CO2 reactions o N2 reduction reaction (ammonia synthesis),o Methanol oxidation reaction (MOR). • The less mobile nanowire catalyst could also offer robust and active catalysts for other important reactions in gas phase o CO oxidationo Methane oxidation reaction
- Detailed Technology Description
- Researchers at UCLA designed and synthesized ultrafine jagged Pt nanowires with a record high utilization efficiency of 13.59 A/mgPt, which nearly doubles the highest mass activity value ever reported. The Pt nanowires also exhibit the highest electrochemical active surface area, and high specific activity. These Pt nanowires can also be made in contact with carbon support via multiple points, which promises efficient charge transport and collection.
- Others
-
State Of Development
The UCLA researchers have synthesized the ultrafine jagged Pt nanowires and demonstrated experimentally the record high mass activity (13.59 A/mgPt) for oxygen reduction reaction, and robust mass activity (7.9 A/mgPt) for hydrogen evolution reaction.
Background
Hydrogen fuel cell, with water as the only by-product, is a promising green energy source. Platinum has been used as the catalyst for oxygen reduction reaction (ORR). However, the critical limiting factor for making hydrogen fuel cells economical for transportation is the low Pt catalyst utilization efficiency, i.e. mass activity.
Related Materials
Additional Technologies by these Inventors
- Graphene Nanomesh As A Continuous Semiconducting Thin Film For Large Scale Field Effect Transistors
- Vertical Heterostructures for Transistors, Photodetectors, and Photovoltaic Devices
- Graphene Moisture-Resistive Membrane Cathode for Li-Air Battery in Ambient Conditions
- A Composite of Two Dimensional Material and One Dimensional Material as Transparent Conductor
- Conductor-Semiconductor Composite Films and Their Applications for High Performance Transistors
- Chemical Vapor Deposition Growth of the Large Single Crystalline Domains of Monolayer and Bilayer
- Graphene Based Catalysts for Biomimetric Generation of Antithrombotic Species
- Palladium Alloy Hydride Nano Materials
- High Performance Thin Films from Solution Processible Two-Dimensional Nanoplates
- Nanoscale Optical Voltage Sensors
- Pore Size Engineering Of Porous Carbons Using Covalent Triazine Frameworks As Precursors
- The Method of Enhanced Pressure Sensing Performance for Pressure Sensors
- Very High Energy Density Silicide-Air Primary Batteries
- Wafer Scale Growth Of Large Arrays Of Perovskite Micro-Plate Crystals For Functional Electronics And Optoelectronics
- Three-Dimensional Holey Graphene Frameworks Based High-Performance Supercapacitors
- High Performance PtNiCuMo Electrochemical Catalyst
- Graphene Nanomesh As A Glucose Sensor
- Upconversion Plasmonic Mapping: A Direct Plasmonic Visualization And Spectrometer-Free Sensing Method
- Electrochemical Molecular Intercalation for Synthesis of Monolayer Atomic Crystal Molecular Superlattices
Tech ID/UC Case
27063/2017-108-0
Related Cases
2017-108-0
- *Abstract
-
UCLA researchers in the Department of Chemistry and Biochemistry have developed a novel process of synthesizing ultrafine jagged Pt nanowires with a record high utilization efficiency for fuel cell catalyst applications.
- *Principal Investigator
-
Name: Xiangfeng Duan
Department:
Name: Yu Huang
Department:
Name: Mufan Li
Department:
- Country/Region
- USA
