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Amorphous/2H-MoS2nanoflowers with P doping and S vacancies to achieve efficient pH-universal hydrogen evolution at high current density
- Source :
- SCIENCE CHINA Chemistry; September 2022, Vol. 65 Issue: 9 p1829-1837, 9p
- Publication Year :
- 2022
-
Abstract
- Molybdenum disulfide (MoS2) has become a competitive candidate for efficient and economical hydrogen evolution reaction (HER). Compared with 1T-MoS2, 2H-MoS2possesses exceptional thermodynamic stability but still suffers from low active site density, poor conductivity, and weak hydrogen bonding in the wide pH range. Herein, 2H-MoS2nanoflowers with phosphorus doping, sulfur vacancies and crystalline-amorphous heterojunction were synthesized viaphosphorus-assisted rapid calcination method. Benefiting from the cooperative interaction of multiple strategies, the prepared 2H-MoS2nanoflowers firstly achieve efficient pH-universal HER at high current densities. Experimental results show that in alkaline, acidic, and neutral media, MoS2-P2 requires only 332, 302, and 417 mV to drive the current density of 500 mA cm−2and obtains 932, 1100, and 472 mA cm−2at the potential of −0.4 V vs. RHE, respectively. Moreover, MoS2-P2 shows excellent stability of low and high current density in the full pH range.
Details
- Language :
- English
- ISSN :
- 16747291 and 18691870
- Volume :
- 65
- Issue :
- 9
- Database :
- Supplemental Index
- Journal :
- SCIENCE CHINA Chemistry
- Publication Type :
- Periodical
- Accession number :
- ejs60551901
- Full Text :
- https://doi.org/10.1007/s11426-022-1287-4