| 학회 |
한국화학공학회 |
| 학술대회 |
2018년 가을 (10/24 ~ 10/26, 대구 EXCO) |
| 권호 |
24권 2호, p.2085 |
| 발표분야 |
촉매 및 반응공학(Catalysis and Reaction Engineering) |
| 제목 |
Electrochemically Overgown MoO3-x–Pt Mixed Nanoflakes on Bulk MoS2 Surface and Their Application to Electrocatalysis |
| 초록 |
Here we present an in situ electrochemical process to synthesize MoO3-x-Pt mixed nanoflakes (NFs) overgrown on commercial bulk MoS2 by using a facile and simple electrochemical method. The overgrowth of MoO3-x-Pt mixed NFs on the bulk MoS2 surface is conducted by applying electrical energy to the bulk MoS2 in an acidic solution. The synthesized MoO3-x-Pt mixed NFs demonstrate excellent catalytic performance with an overpotential of 69 mV (vs. SHE) at -10 mA/cm2 and a Tafel slope of 53 mV/dec for electrochemical hydrogen evolution reaction (HER), comparable with the values (62 mV (vs. SHE) and 32 mV/dec) of commercial Pt black despite of ultra low Pt loaded amounts (about 30-40 times lower than commercial Pt black) in the MoO3-x-Pt mixed NFs. These outstanding HER characteristics are related to the existence and increase of oxygen vacancy sites such as Mo5+ (known as the HER active sites) and MoO3-x-Pt interfacial sites in the MoO3-x NF structures. |
| 저자 |
이대원1, 김영민1, 권영국1, 박종혁2, 김형주1
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| 소속 |
1한국화학(연), 2연세대 |
| 키워드 |
촉매 및 반응공학 |
| E-Mail |
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| 원문파일 |
초록 보기 |
