Magnetic and Electrocatalytic Properties of Transition Metal Doped MoS2 Nanocrystals

L. M. Martinez; J. A. Delgado; C. L. Saiz; A. Cosio; Y. Wu; D. Villagrán; K. Gandha; C. Karthik; I. C. Nlebedim; S. R. Singamaneni

doi:10.1063/1.5043208

Magnetic and Electrocatalytic Properties of Transition Metal Doped MoS₂ Nanocrystals

L. M. Martinez, J. A. Delgado, C. L. Saiz, A. Cosio, Y. Wu, D. Villagrán, K. Gandha, C. Karthik, I. C. Nlebedim, S. R. Singamaneni

Boise State University

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

47 Scopus citations

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 MnMoS ₂ , and the order of catalytic activity found from Tafel slopes is CoMoS ₂ > 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. 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.

Original language	American English
Article number	153903
Journal	Journal of Applied Physics
Volume	124
Issue number	15
DOIs	https://doi.org/10.1063/1.5043208
State	Published - 21 Oct 2018

Keywords

2D materials
catalysis
electric currents
ferromagnetism
paramagnetism
transition metals

EGS Disciplines

Materials Science and Engineering

Access to Document

10.1063/1.5043208

Magnetic and Electrocatalytic Properties of Transition Metal DopeFinal published version, 2.97 MBLicense: Unspecified

Cite this

@article{7f4e32e061e544fd9e7f877836c6717d,

title = "Magnetic and Electrocatalytic Properties of Transition Metal Doped MoS2 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 MnMoS 2 , and the order of catalytic activity found from Tafel slopes is CoMoS 2 > 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. 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.",

keywords = "2D materials, catalysis, electric currents, ferromagnetism, paramagnetism, transition metals",

author = "Martinez, {L. M.} and Delgado, {J. A.} and Saiz, {C. L.} and A. Cosio and Y. Wu and D. Villagr{\'a}n and K. Gandha and C. Karthik and Nlebedim, {I. C.} and Singamaneni, {S. R.}",

note = "Publisher Copyright: {\textcopyright} 2018 Author(s).",

year = "2018",

month = oct,

day = "21",

doi = "10.1063/1.5043208",

language = "American English",

volume = "124",

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TY - JOUR

T1 - Magnetic and Electrocatalytic Properties of Transition Metal Doped MoS2 Nanocrystals

AU - Martinez, L. M.

AU - Delgado, J. A.

AU - Saiz, C. L.

AU - Cosio, A.

AU - Wu, Y.

AU - Villagrán, D.

AU - Gandha, K.

AU - Karthik, C.

AU - Nlebedim, I. C.

AU - Singamaneni, S. R.

PY - 2018/10/21

Y1 - 2018/10/21

N2 - 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 MnMoS 2 , and the order of catalytic activity found from Tafel slopes is CoMoS 2 > 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. 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.

AB - 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 MnMoS 2 , and the order of catalytic activity found from Tafel slopes is CoMoS 2 > 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. 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.

KW - 2D materials

KW - catalysis

KW - electric currents

KW - ferromagnetism

KW - paramagnetism

KW - transition metals

UR - https://scholarworks.boisestate.edu/mse_facpubs/366

U2 - 10.1063/1.5043208

DO - 10.1063/1.5043208

M3 - Article

SN - 0021-8979

VL - 124

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 15

M1 - 153903

ER -