Back to Search
Start Over
A Pt content and pore structure gradient distributed catalyst layer to improve the PEMFC performance
- Source :
- International Journal of Hydrogen Energy. 42:7241-7245
- Publication Year :
- 2017
- Publisher :
- Elsevier BV, 2017.
-
Abstract
- The catalyst layer is a key component in the proton exchange membrane fuel cell (PEMFC) for it is where the conversion of fuel into electricity takes place. Traditionally, electrocatalyst is uniformly distributed in the catalyst layers of the membrane electrode assembly (MEA) and the high Pt consumption in catalyst layers blocks the widely use of PEMFC. Here we proposed a Pt content and pore structure gradient distributed, two-layer catalyst layer for PEMFC to improve the MEA performance. Energy-dispersive X-ray (EDX) spectroscopy results show Pt nanoparticles gradient distributed on the vertical direction of catalyst layer. The pore size in the Pt poor layer is larger than that in the Pt rich layer, and this structure can improve the Pt utilization and enhance the mass transfer in the catalyst layer. The single cell test result shows this new MEA has a better performance (11%) than the traditional MEA.
- Subjects :
- Pore size
Materials science
Renewable Energy, Sustainability and the Environment
Membrane electrode assembly
Analytical chemistry
Energy Engineering and Power Technology
Proton exchange membrane fuel cell
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Electrocatalyst
01 natural sciences
0104 chemical sciences
Catalysis
Fuel Technology
Chemical engineering
Mass transfer
Vertical direction
0210 nano-technology
Layer (electronics)
Subjects
Details
- ISSN :
- 03603199
- Volume :
- 42
- Database :
- OpenAIRE
- Journal :
- International Journal of Hydrogen Energy
- Accession number :
- edsair.doi...........461233ccf946adb7ba497e245932c5f5