Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 293, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120227
Keywords
Two-dimensional quantum dots PtS2; Titanium carbide; Chemical vapor deposition; In-situ Raman spectroscopy; Hydrogen production; S-H bonding formation
Funding
- NanoMaterial Technology Development Program through National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2016M3A7B4904328]
- Basic Science Research Program through National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2019R1A2C2010745]
- Ministry of Trade, Industry & Energy (MOTIE, Korea) [20011360]
- National Research Foundation of Korea [2016M3A7B4904328, 2019R1A2C2010745] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, a two-dimensional quantum dots catalyst PtS2/TiC with low Pt loading demonstrated excellent hydrogen evolution reaction (HER) activity. In-situ Raman spectra revealed the important role of S atoms in PtS2 as the active sites for HER. This research provides fundamental understanding for designing more efficient catalysts in electrochemical applications.
Two-dimensional quantum dots (2D QDs) comprising PtS2 with low Pt loading (0.002 wt.%) distributed on a distinctive CVD-grown titanium carbide substrate (PtS2/TiC) was successfully synthesized and employed for a hydrogen evolution reaction (HER). Notably, despite the low loading of the former component, PtS2/TiC showed excellent HER activity with a superior overpotential (55 mV at 10 mA/cm(-2)) to that of commercial Pt/C (50 mV at 10 mA/cm(-2)). The Faraday efficiency of PtS2/TiC was found to be 92.5 %, revealing the superior properties of hydrogen production. The In-situ Raman spectra reveal the important role of S atoms in PtS2 as the active sites for HER, as evidenced by S-H bonding formation at 2532 cm(-1) during the HER process. This study provides a fundamental understanding essential for the design of more efficient catalysts in the field of electrochemical applications.
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