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|
| Type |
Oral Presentation |
| Area |
Current Trends in Environmental and Energy Chemistry |
| Room No. |
407호 |
| Time |
THU 10:15-: |
| Code |
ENVR.O-6 |
| Subject |
Poisoning Effects on Ni Electrocatalyst in Solid Oxide Carbon Fuel Cells |
| Authors |
장한샘, 이재영*
GIST 지구환경공학부, Korea
|
| Abstract |
Fuel cells have garnered increasing interest due to concerns about the environmental impact of conventional power generation systems. In particular, fuel cells take advantage of a predictable and continuous power output as long as fuel is sustained or supplied. Meanwhile, it has been occasionally occurred for SO-CFCs (solid oxide carbon fuel cells) that their electrochemical performances go unpredictable and peculiar, leading to not a few limitations on empirical fuel cell operations. In other words, SO-CFC operators can overcome the limitations and improve their system by dint of understating where and why this unwanted results originate from. We have pondered over the origin of the unwanted results and have figured out that it comes from a change in the state of Ni electrocatalyst. Nickel is the most famous electrocatalyst employed in SO-CFCs; however, it could be poisoned by either its oxidation or carbon deposition over its surface. In addition, if Ni is poisoned, an electrochemical performance of SO-CFCs accordingly deteriorates. This poisoning effects stem from the amount of an actual fuel within an anode chamber, i.e. further oxidizable gaseous molecules, the amount of which is determined by the physicochemical properties of solid carbon source. In this regard, we demonstrate a relationship between the physicochemical properties of solid carbon source and the resultant state of Ni electrocatalyst. |
| E-mail |
luxuriest@gist.ac.kr |
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119th General Meeting of the KCS