| 학회 |
한국화학공학회 |
| 학술대회 |
2019년 봄 (04/24 ~ 04/26, 제주국제컨벤션센터) |
| 권호 |
25권 1호, p.888 |
| 발표분야 |
촉매 및 반응공학(Catalysis and Reaction Engineering) |
| 제목 |
Pt-Based Intermetallic Nanostructures: Activity Origin and Multifunctionality for Efficient Electrocatalysis |
| 초록 |
Pt-based intermetallic nanostructures have demonstrated superior electrocatalytic performances compared to random alloy structures. However, the origin of their enhanced catalytic properties remains elusive, and a robust synthetic strategy for intermetallic nanostructures represents a challenge. Here, we reveal by combining theoretical and experimental results that the activity enhancement in intermetallic structures for oxygen reduction reaction (ORR) originates from the intensified ligand effect. We prepare well-defined model nanocatalysts via confined nanospace-directed synthesis using mesoporous silica templates, which allows control over the size, shape, and atomic ordering of nanostructures. The prepared ordered intermetallic Pt3Co nanowires (O-PtCo NWs) benefitted from the intensified ligand effect, Pt-skin layer, show superior ORR activity and durability to disordered alloy Pt3Co nanowires and Pt/C catalyst. The O-PtCo NWs further exhibited catalytic superiority in hydrogen evolution and methanol oxidation, and demonstrated excellent cell performance in proton exchange membrane fuel cells. |
| 저자 |
김호영1, 김종민2, 하윤후3, 우진우1, 김형준3, 김진영2, 주상훈1
|
| 소속 |
1울산과학기술원, 2한국과학기술(연), 3한국과학기술원 |
| 키워드 |
촉매 |
| E-Mail |
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| VOD |
VOD 보기 |
| 원문파일 |
초록 보기 |
