| 학회 |
한국공업화학회 |
| 학술대회 |
2021년 가을 (11/03 ~ 11/05, 대구 엑스코(EXCO)) |
| 권호 |
25권 2호 |
| 발표분야 |
포스터-촉매 |
| 제목 |
Pt nanoparticles encapsulated in CeO2 over-layers synthesized by controlled reductive treatment to suppress CH4 formation in high-temperature water-gas shift reaction |
| 초록 |
Pt supported on CeO2 (Pt/CeO2) is known to be a good catalyst for the water-gas shift (WGS) reaction. However, Pt catalyzes the methanation reaction as a side reaction, which limits the usefulness of Pt/CeO2 as a catalyst in the high-temperature (HT) WGS reaction. In this study, Pt nanoparticles (Pt NPs) were encapsulated in CeO2 over-layers (‘Pt in CeO2’) by using controlled reductive treatments to suppress the methanation reaction on Pt NPs. ‘Pt in CeO2’ catalyst demonstrated the much lower CH4 selectivity while showing the same high activity in the HT-WGS reaction compared to the conventional ‘Pt on CeO2’ catalyst. Detailed characterizations revealed that the underlying Pt NPs promoted the WGS reaction on thin (＜1 nm) CeO2 over-layers by facilitating the formation of active oxygen vacancies. The present contribution to catalyst modification via simple thermal treatments will provide additional way to control metal-support interactions to improve catalytic performance. |
| 저자 |
이재하1, 이은원1, 강성수1, 박정원1, 김지만2, 김도희1
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| 소속 |
1서울대, 2성균관대 |
| 키워드 |
Pt/CeO2; LT-WGS; encapsulation; oxygen vacancy
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| E-Mail |
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