Activity Enhancement of Metal-Oxynitride Catalysts in Polymer Electrolyte Membrane Fuel Cell Cathodes by Heteroatom-Doping and Defect-Incorporation
| Project/Area Number |
23760185
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Thermal engineering
|
|---|
| Research Institution | Hirosaki University (2012)
Toyohashi University of Technology (2011) |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2011 – 2012
|
| Project Status |
Completed (Fiscal Year 2012)
|
| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
|
|---|
| Keywords | 固体高分子形燃料電池 / カソード / 非白金触媒 / 酸素還元反応 / 金属酸窒化物 / BCN / 燃料電池 |
|---|
| Research Abstract |
Polymer Electrolyte Membrane Fuel Cells (PEMFCs) have long been expected as energy conversion devices in many applications; recently, particular interest has focused on their use in vehicles. In this study, metal-oxynitrides without using platinum-group metals were developed for use as the oxygen reduction reaction (ORR) catalyst in PEMFC cathodes. Active sites for an ORR and the reaction mechanism in hafnium oxynitride nanoparticles supported on carbon black (HfO_xN_y-C) were investigated. The results indicated that at least, nitrogen atoms in HfO_xN_y are necessary for maximizing the ORR activity. Further, the ORR activity of the HfO_xN_y-C catalysts increased with increasing crystallinity of the Hf_2ON_2 phase in the HfO_xN_y particles. Then, carbon supports and titanium oxynitride catalysts were developed. The maximum onset potential for ORR obtained from the best catalyst was above 90% of that of carbon-supported platinum.
|
Report
(3 results)
Research Products
(20 results)
