2014 Fiscal Year Final Research Report
CO2 Electrolysis by solid electrolyte having iron catalyst
| Project/Area Number |
24561010
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Recycling engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | CO2排出削減 / 電気分解 / 固体電解質 / 鉄触媒 / ReDox反応 |
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| Outline of Final Research Achievements |
Reductions in CO2 emission can be achieved directly through CO2 capture and storage (CCS). It is effective method for the large CO2 emitters such as electrical power plants and iron and steel mills. Solid-oxide electrolysis presents an alternative means of reducing CO2 that can use some of the CO2 captured by CCS as a source of electrolysis. In addition, unused heat generated by steelmaking and through renewable sources (e.g., solar and wind) can be utilized for high-temperature electrolysis.
This study investigated the effect of applying a high voltage of between 2.5 and 4.0 V to common electrolytic materials (YSZ and Pt), and found that although the initial current density is very low, it increases drastically upon application of a high voltage. The results of FE-SEM observation revealed that the interface between the YSZ and Pt electrode moves into the YSZ by about 70 micro m, and consists of a nano- and micro-porous structure that reduces the resistivity and gas diffusivity.
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| Free Research Field |
高温物理化学
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