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Title: Magnetic and electrocatalytic properties of transition metal doped MoS 2 nanocrystals

Abstract

In this paper, the magnetic and electrocatalytic properties of hydrothermally grown transition metal doped (10% of Co, Ni, Fe, and Mn) 2H-MoS 2 nanocrystals (NCs) with a particle size 25–30 nm are reported. The pristine 2H-MoS 2 NCs showed a mixture of canted anti-ferromagnetic and ferromagnetic behavior. While Co, Ni, and Fe doped MoS 2 NCs revealed room temperature ferromagnetism, Mn doped MoS 2 NCs showed room temperature paramagnetism, predominantly. The ground state of all the materials is found to be canted-antiferromagnetic phase. To study electrocatalytic performance for hydrogen evolution reaction, polarization curves were measured for undoped and the doped MoS 2 NCs. At the overpotential of η = –300 mV, the current densities, listed from greatest to least, are FeMoS 2, CoMoS 2, MoS 2, NiMoS 2, and MnMoS2, and the order of catalytic activity found from Tafel slopes is CoMoS2 > MoS 2 > NiMoS 2 > FeMoS 2 > MnMoS 2. The increasing number of catalytically active sites in Co doped MoS 2 NCs might be responsible for their superior electrocatalytic activity. In conclusion, the present results show that the magnetic order-disorder behavior and catalytic activity can be modulated by choosing the suitable dopants in NCs ofmore » 2D materials.« less

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [2]; ORCiD logo [3];  [2];  [1]
  1. The Univ. of Texas at El Paso, El Paso, TX (United States)
  2. Ames Lab., Ames, IA (United States)
  3. Boise State Univ., Boise, ID (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1481874
Report Number(s):
IS-J-9761
Journal ID: ISSN 0021-8979
Grant/Contract Number:  
AC02-07CH11358; DMR-1205302
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 124; Journal Issue: 15; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Martinez, L. M., Delgado, J. A., Saiz, C. L., Cosio, A., Wu, Y., Villagrán, D., Gandha, K., Karthik, C., Nlebedim, I. C., and Singamaneni, S. R.. Magnetic and electrocatalytic properties of transition metal doped MoS2 nanocrystals. United States: N. p., 2018. Web. doi:10.1063/1.5043208.
Martinez, L. M., Delgado, J. A., Saiz, C. L., Cosio, A., Wu, Y., Villagrán, D., Gandha, K., Karthik, C., Nlebedim, I. C., & Singamaneni, S. R.. Magnetic and electrocatalytic properties of transition metal doped MoS2 nanocrystals. United States. doi:10.1063/1.5043208.
Martinez, L. M., Delgado, J. A., Saiz, C. L., Cosio, A., Wu, Y., Villagrán, D., Gandha, K., Karthik, C., Nlebedim, I. C., and Singamaneni, S. R.. Wed . "Magnetic and electrocatalytic properties of transition metal doped MoS2 nanocrystals". United States. doi:10.1063/1.5043208.
@article{osti_1481874,
title = {Magnetic and electrocatalytic properties of transition metal doped MoS2 nanocrystals},
author = {Martinez, L. M. and Delgado, J. A. and Saiz, C. L. and Cosio, A. and Wu, Y. and Villagrán, D. and Gandha, K. and Karthik, C. and Nlebedim, I. C. and Singamaneni, S. R.},
abstractNote = {In this paper, the magnetic and electrocatalytic properties of hydrothermally grown transition metal doped (10% of Co, Ni, Fe, and Mn) 2H-MoS2 nanocrystals (NCs) with a particle size 25–30 nm are reported. The pristine 2H-MoS2 NCs showed a mixture of canted anti-ferromagnetic and ferromagnetic behavior. While Co, Ni, and Fe doped MoS2 NCs revealed room temperature ferromagnetism, Mn doped MoS2 NCs showed room temperature paramagnetism, predominantly. The ground state of all the materials is found to be canted-antiferromagnetic phase. To study electrocatalytic performance for hydrogen evolution reaction, polarization curves were measured for undoped and the doped MoS2 NCs. At the overpotential of η = –300 mV, the current densities, listed from greatest to least, are FeMoS2, CoMoS2, MoS2, NiMoS2, and MnMoS2, and the order of catalytic activity found from Tafel slopes is CoMoS2 > MoS2 > NiMoS2 > FeMoS2 > MnMoS2. The increasing number of catalytically active sites in Co doped MoS2 NCs might be responsible for their superior electrocatalytic activity. In conclusion, the present results show that the magnetic order-disorder behavior and catalytic activity can be modulated by choosing the suitable dopants in NCs of 2D materials.},
doi = {10.1063/1.5043208},
journal = {Journal of Applied Physics},
number = 15,
volume = 124,
place = {United States},
year = {Wed Oct 17 00:00:00 EDT 2018},
month = {Wed Oct 17 00:00:00 EDT 2018}
}

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