Surfactant free synthesis of high surface area Pt@PdM3 (M = Mn, Fe, Co, Ni, Cu) core/shell electrocatalysts with enhanced electrocatalytic activity and durability for PEM fuel cell applications

2016 ◽  
Vol 40 (10) ◽  
pp. 8681-8695 ◽  
Author(s):  
Karuppannan Mohanraju ◽  
Govindarajan Kousik ◽  
Louis Cindrella
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction ◽  
Surface Area ◽  
Electrocatalytic Activity ◽  
High Surface ◽  
High Surface Area ◽  
Pem Fuel Cell ◽  
Core Shell ◽  
Oxygen Reduction Reactions ◽  
Shell Nanostructures

High surface area core/shell nanostructures of Pt covered Pd alloys were synthesized and they exhibited enhanced electrocatalytic activity in oxygen reduction reactions.

Improved Electrocatalytic Activity of Oxygen Reduction on Platinum Using Nano-Cobalt in Direct Methanol Fuel Cell Cathode Electrodes

2006 ◽  
Author(s):  
Kimberly McGrath ◽  
Douglas Carpenter
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction ◽  
Electrocatalytic Activity ◽  
Direct Methanol Fuel Cell ◽  
High Surface ◽  
High Surface Area ◽  
Reduction Reaction ◽  
Open Circuit ◽  
Direct Methanol ◽  
Methanol Fuel Cell

High surface area nanometal particles of nano-cobalt (n-Co) (approx 8 nm particles), produced at QuantumSphere Inc., were blended in various ratios with Pt and Nafion® ionomer, and investigated for their electrocatalytic activity in the oxygen reduction reaction (ORR). The ORR was evaluated by voltammetry using Pt/n-Co blended catalyst on glassy carbon to determine both kinetic activity and as an indicator of direct methanol fuel cell (DMFC) cathode performance. Kinetic enhancement was observed for Pt:n-Co where n-Co is 30–50% (by weight) of the catalyst mixture, including a minimum of 10 mV improvement in the open circuit voltage (OCV). By Tafel slope measurements, it is clear that the mechanism for ORR does not change, however the reaction rate is enhanced by addition of n-Co to Pt in the catalytic ink. For ink compositions similar to those used for standard DMFC cathodes, eliminating 50% of the Pt black resulting in 50% higher energy density while reducing total catalyst cost by roughly 44%.

Synthesis and Characterization of Hybrid ZnO@Ag Core-Shell Nanospheres for Gas Sensor Applications

2012 ◽  
Vol 710 ◽  
pp. 768-773 ◽  
Author(s):  
V. Ponnuvelu Dinesh ◽  
P. Biji ◽  
M. Kumaravel ◽  
A.K. Tyagi ◽  
M. Kamaruddin
Keyword(s):  
Surface Area ◽  
Gas Sensing ◽  
High Surface ◽  
High Surface Area ◽  
Silver Nanoclusters ◽  
Core Shell ◽  
Sensor Applications ◽  
Shell Nanostructures ◽  
Sensing Material ◽  
Interfacial Compatibility

ZnO nanospheres were prepared by hydrothermal method using CTAB as protecting ligands. The purified ZnO nanospheres were functionalized using 3-aminopropyl-trimethoxysilane (APTMS) and made into core-shell nanostructures with in-situ reduction of Ag+ into silver nanoclusters. ZnO nanospheres act as the core while silver nanoclusters act as shell material resulting in the formation of ZnO@Ag core-shell nanostructures. The precursor ZnO nanospheres and ZnO@Ag core-shell nanostructures were well characterised structurally by UV-Visible, FT-IR, XRD, and TGA and morphologically by SEM and HR-TEM. The analysis confirms that Ag nanoclusters are attached to ZnO nanospheres with uniform distribution. The induced surface area of these hybrid core-shell structures with isolated nanoclusters on ZnO surface pointed towards the possibility of having better sensitivity as an excellent gas sensing material. The present investigation provided an easy synthetic platform for obtaining high surface area core-shell nanostructures which enhances interfacial compatibility between metal oxide core and metal shell by suitable functionalization for generating better gas sensing materials.

Preparation and characterization of PtIr alloy dendritic nanostructures with superior electrochemical activity and stability in oxygen reduction and ethanol oxidation reactions

2016 ◽  
Vol 6 (2) ◽  
pp. 569-576 ◽  
Author(s):  
Young-Woo Lee ◽  
Eui-Tak Hwang ◽  
Da-Hee Kwak ◽  
Kyung-Won Park
Keyword(s):  
Oxygen Reduction ◽  
Surface Area ◽  
Ethanol Oxidation ◽  
High Surface ◽  
High Surface Area ◽  
Oxidation Reactions ◽  
Electrocatalytic Properties ◽  
Oxygen Reduction Reactions ◽  
Dendritic Nanostructures

PtIr alloy dendritic nanostructures with high surface area exhibit superior electrocatalytic properties in ethanol oxidation and oxygen reduction reactions.

High-surface-area CoTMPP/C synthesized by ultrasonic spray pyrolysis for PEM fuel cell electrocatalysts

2007 ◽  
Vol 52 (13) ◽  
pp. 4532-4538 ◽  
Author(s):  
Hansan Liu ◽  
Chaojie Song ◽  
Yuanhua Tang ◽  
Jianlu Zhang ◽  
Jiujun Zhang
Keyword(s):  
Fuel Cell ◽  
Spray Pyrolysis ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Ultrasonic Spray Pyrolysis ◽  
Pem Fuel Cell ◽  
Ultrasonic Spray

Enhancement of the oxygen reduction reaction electrocatalytic activity of metallo-corroles using contracted cobalt(iii) CF3-corrole incorporated in a high surface area carbon support

2020 ◽  
Vol 56 (61) ◽  
pp. 8627-8630
Author(s):  
Hilah C. Honig ◽  
Ariel Friedman ◽  
Noam Zion ◽  
Lior Elbaz
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Surface Area ◽  
Electrocatalytic Activity ◽  
High Surface ◽  
High Surface Area ◽  
Carbon Support ◽  
Reduction Reaction

Molecular ORR catalysts based on metallo-corrole with the smallest meso-substituent reported to date, Co(iii)CF3-corrole, was synthesized and compared to the well-studied Co(iii)tpf-corrole when adsorbed on a high surface area carbon support.

On the influence of the Pt to carbon ratio on the degradation of high surface area carbon supported PEM fuel cell electrocatalysts

2013 ◽  
Vol 34 ◽  
pp. 153-156 ◽  
Author(s):  
Jozsef Speder ◽  
Alessandro Zana ◽  
Ioannis Spanos ◽  
Jacob J.K. Kirkensgaard ◽  
Kell Mortensen ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Pem Fuel Cell

Benchmarking high surface area electrocatalysts in a gas diffusion electrode: measurement of oxygen reduction activities under realistic conditions

2018 ◽  
Vol 11 (4) ◽  
pp. 988-994 ◽  
Author(s):  
Masanori Inaba ◽  
Anders Westergaard Jensen ◽  
Gustav Wilhelm Sievers ◽  
María Escudero-Escribano ◽  
Alessandro Zana ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Gas Diffusion Electrodes ◽  
Electrocatalytic Performance ◽  
Fuel Cell Catalysts

In this work, we introduce the application of gas diffusion electrodes (GDE) for benchmarking the electrocatalytic performance of high surface area fuel cell catalysts.

High surface area mesoporous LaFexCo1−xO3 oxides: synthesis and electrocatalytic property for oxygen reduction

2013 ◽  
Vol 42 (26) ◽  
pp. 9448 ◽  
Author(s):  
Yongxia Wang ◽  
Xiangzhi Cui ◽  
Yongsheng Li ◽  
Lisong Chen ◽  
Zhu Shu ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Electrocatalytic Property
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