Carbon-embedded mesoporous Nb-doped TiO2 nanofibers as catalyst support for the oxygen reduction reaction in PEM fuel cells

2016 ◽  
Vol 4 (17) ◽  
pp. 6540-6552 ◽  
Author(s):  
Esmaeil Navaei Alvar ◽  
Biao Zhou ◽  
S. Holger Eichhorn
Keyword(s):  
Titanium Dioxide ◽  
Oxygen Reduction Reaction ◽  
Polymer Coating ◽  
External Surface ◽  
Catalyst Support ◽  
Pem Fuel Cells ◽  
Reduction Reaction ◽  
External Surface Area ◽  
Tio2 Nanofibers ◽  
Doped Titanium Dioxide

Embedding carbon via polymer coating and reductive calcination to increase the conductivity and external surface area of mesoporous Nb-doped titanium dioxide nanofibers.

PEM Fuel Cells With Multiwalled Carbon Nanotubes as Catalyst Support Material

2006 ◽  
Author(s):  
A. Leela Mohana Reddy ◽  
M. M. Shaijumon ◽  
N. Rajalakshmi ◽  
S. Ramaprabhu
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Chemical Reduction ◽  
Catalyst Support ◽  
Pem Fuel Cells ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Support Material ◽  
Multiwalled Carbon

Multi-walled carbon nanotubes (MWNTs) have been synthesized by the pyrolysis of acetylene using hydrogen decrepitated Mischmetal (Mm) based AB3 alloy hydride catalyst. MWNTs have been characterized by SEM, TEM, Raman and XRD studies. Pt-supported MWNTs (Pt/MWNTs) have been prepared by chemical reduction method using functionalized MWNTs. Composites of Pt/MWNTs and Pt/C have been used as electrocatalysts for oxygen reduction reaction in Proton Exchange Membrane Fuel Cell (PEMFC). Cathode catalyst with 50% Pt/MWNTs and 50% Pt/C gives the best performance because of the better dispersion and good accessibility of MWNTs support and the Pt electrocatalysts in the mixture for the oxygen reduction reaction in PEMFC. The paper emphasizes that Pt/C and Pt/MWNTs composites have good potential as catalyst support material in PEMFC.

scholarly journals OH formation and H2 adsorption at the liquid water–Pt(111) interface

2018 ◽  
Vol 9 (34) ◽  
pp. 6912-6921 ◽  
Author(s):  
Henrik H. Kristoffersen ◽  
Tejs Vegge ◽  
Heine Anton Hansen
Keyword(s):  
Molecular Dynamics ◽  
Oxygen Reduction Reaction ◽  
Ab Initio ◽  
Oxygen Reduction ◽  
Liquid Water ◽  
Pem Fuel Cells ◽  
Reduction Reaction ◽  
Catalytic Reactions ◽  
Water Dynamics ◽  
H2 Adsorption

The liquid water–Pt(111) interface is studied with constant temperature ab initio molecular dynamics to explore the importance of liquid water dynamics on catalytic reactions such as the oxygen reduction reaction in PEM fuel cells.

scholarly journals N-doped carbon nanomaterials are durable catalysts for oxygen reduction reaction in acidic fuel cells

2015 ◽  
Vol 1 (1) ◽  
pp. e1400129 ◽  
Author(s):  
Jianglan Shui ◽  
Min Wang ◽  
Feng Du ◽  
Liming Dai
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Carbon Nanomaterials ◽  
Low Cost ◽  
Clean Energy ◽  
Pem Fuel Cells ◽  
Reduction Reaction ◽  
Metal Free ◽  
Carbon Based

The availability of low-cost, efficient, and durable catalysts for oxygen reduction reaction (ORR) is a prerequisite for commercialization of the fuel cell technology. Along with intensive research efforts of more than half a century in developing nonprecious metal catalysts (NPMCs) to replace the expensive and scarce platinum-based catalysts, a new class of carbon-based, low-cost, metal-free ORR catalysts was demonstrated to show superior ORR performance to commercial platinum catalysts, particularly in alkaline electrolytes. However, their large-scale practical application in more popular acidic polymer electrolyte membrane (PEM) fuel cells remained elusive because they are often found to be less effective in acidic electrolytes, and no attempt has been made for a single PEM cell test. We demonstrated that rationally designed, metal-free, nitrogen-doped carbon nanotubes and their graphene composites exhibited significantly better long-term operational stabilities and comparable gravimetric power densities with respect to the best NPMC in acidic PEM cells. This work represents a major breakthrough in removing the bottlenecks to translate low-cost, metal-free, carbon-based ORR catalysts to commercial reality, and opens avenues for clean energy generation from affordable and durable fuel cells.

Sign in / Sign up

Export Citation Format

Share Document