Atomic interactions of two-dimensional PtS2 quantum dots/TiC heterostructures for hydrogen evolution reaction

Sangmin Jeong; Hien Duy Mai; Tri Khoa Nguyen; Jong Sang Youn; Ki Hun Nam; Cheol Min Park; Ki Joon Jeon

doi:10.1016/j.apcatb.2021.120227

Atomic interactions of two-dimensional PtS₂ quantum dots/TiC heterostructures for hydrogen evolution reaction

Sangmin Jeong
, Hien Duy Mai
, Tri Khoa Nguyen
, Jong Sang Youn
, Ki Hun Nam
, Cheol Min Park
, Ki Joon Jeon

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

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.

Original language	English
Article number	120227
Journal	Applied Catalysis B: Environmental
Volume	293
DOIs	https://doi.org/10.1016/j.apcatb.2021.120227
State	Published - 15 Sep 2021

Bibliographical note

Publisher Copyright:
© 2021 Elsevier B.V.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Chemical vapor deposition
Hydrogen production
In-situ Raman spectroscopy
S-H bonding formation
Titanium carbide
Two-dimensional quantum dots PtS

Access to Document

10.1016/j.apcatb.2021.120227

Cite this

@article{dce8743a01a64b2a86e8be20ed1f89ae,

title = "Atomic interactions of two-dimensional PtS2 quantum dots/TiC heterostructures for hydrogen evolution reaction",

abstract = "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.",

keywords = "Chemical vapor deposition, Hydrogen production, In-situ Raman spectroscopy, S-H bonding formation, Titanium carbide, Two-dimensional quantum dots PtS",

author = "Sangmin Jeong and Mai, \{Hien Duy\} and Nguyen, \{Tri Khoa\} and Youn, \{Jong Sang\} and Nam, \{Ki Hun\} and Park, \{Cheol Min\} and Jeon, \{Ki Joon\}",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2021",

month = sep,

day = "15",

doi = "10.1016/j.apcatb.2021.120227",

language = "English",

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T1 - Atomic interactions of two-dimensional PtS2 quantum dots/TiC heterostructures for hydrogen evolution reaction

AU - Jeong, Sangmin

AU - Mai, Hien Duy

AU - Nguyen, Tri Khoa

AU - Youn, Jong Sang

AU - Nam, Ki Hun

AU - Park, Cheol Min

AU - Jeon, Ki Joon

PY - 2021/9/15

Y1 - 2021/9/15

N2 - 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.

AB - 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.

KW - Chemical vapor deposition

KW - Hydrogen production

KW - In-situ Raman spectroscopy

KW - S-H bonding formation

KW - Titanium carbide

KW - Two-dimensional quantum dots PtS

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DO - 10.1016/j.apcatb.2021.120227

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