TY - JOUR
T1 - Alternative synthesis of structurally defective MoS2 nanoflakes for efficient hydrogen evolution reaction
AU - Nguyen-Ba, K.
AU - Vargas-García, J. R.
AU - Manzo-Robledo, A.
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/6
Y1 - 2020/6
N2 - Two-dimensional layered molybdenum sulfide (MoS2) is highly attractive as electrocatalyst for high purity hydrogen production because of its intrinsic properties and favorable cost-benefit ratio. Notably, electrocatalytic activity of MoS2 strongly depends on exposed edges and density of defect sites. Here, we report the preparation of MoS2 nanoflakes through an oxalic acid assisted-hydrothermal method. A comparatively excessive amount of oxalic acid was used as an alternative strategy for the preparation of MoS2. XRD, TEM, RAMAN, and XPS results revealed that as-prepared MoS2 is highly defective with presence of unsaturated S and abundant exposed edges. As a result, structurally defective MoS2 nanoflakes exhibit high activity for HER with low overpotential of 214 mV at 10 mA/cm2, a small Tafel slope of 52 mV/decade and excellent stability.
AB - Two-dimensional layered molybdenum sulfide (MoS2) is highly attractive as electrocatalyst for high purity hydrogen production because of its intrinsic properties and favorable cost-benefit ratio. Notably, electrocatalytic activity of MoS2 strongly depends on exposed edges and density of defect sites. Here, we report the preparation of MoS2 nanoflakes through an oxalic acid assisted-hydrothermal method. A comparatively excessive amount of oxalic acid was used as an alternative strategy for the preparation of MoS2. XRD, TEM, RAMAN, and XPS results revealed that as-prepared MoS2 is highly defective with presence of unsaturated S and abundant exposed edges. As a result, structurally defective MoS2 nanoflakes exhibit high activity for HER with low overpotential of 214 mV at 10 mA/cm2, a small Tafel slope of 52 mV/decade and excellent stability.
KW - Defective structure
KW - Exposed edges
KW - Hydrogen evolution reaction
KW - Two dimensional layered MoS
UR - http://www.scopus.com/inward/record.url?scp=85082877295&partnerID=8YFLogxK
U2 - 10.1016/j.mseb.2020.114539
DO - 10.1016/j.mseb.2020.114539
M3 - Artículo
AN - SCOPUS:85082877295
SN - 0921-5107
VL - 256
JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
M1 - 114539
ER -