Controlled
Synthesis of Sb<sub>2</sub>(S<sub>1–<i>x</i></sub>Se<sub><i>x</i></sub>)<sub>3</sub> (0 ≤ <i>x</i> ≤ 1) Solid Solution and the Effect of Composition
Variation on Electrocatalytic Energy Conversion and Storage
Malik D. Khan
Saif Ullah Awan
Camila Zequine
Chunyang Zhang
Ram K. Gupta
Neerish Revaprasadu
10.1021/acsaem.9b01895.s001
https://acs.figshare.com/articles/journal_contribution/Controlled_Synthesis_of_Sb_sub_2_sub_S_sub_1_i_x_i_sub_Se_sub_i_x_i_sub_sub_3_sub_0_i_x_i_1_Solid_Solution_and_the_Effect_of_Composition_Variation_on_Electrocatalytic_Energy_Conversion_and_Storage/11629329
Solid
solutions provide better control over optical and electronic
properties of a material as a function of the composition. However,
to achieve precise control over stoichiometry, carefully designed
precursors with comparable reactivity are required. We have used the
molecular precursor route to prepare Sb<sub>2</sub>(S<sub>1–<i>x</i></sub>Se<sub><i>x</i></sub>)<sub>3</sub> (0 ≤ <i>x</i> ≤ 1) solid solution over an entire range. The p-XRD
analysis confirms the formation of a solid solution, and EDX analysis
shows a uniform distribution of all elements in the synthesized samples.
Morphology examination by SEM and TEM analysis indicates crystal splitting
in all the samples. Raman analysis confirms the absence of phase segregation,
and UV–vis–NIR analysis shows a gradual change in the
band gap as a function of composition. The electrocatalytic behavior
of the samples for energy generation and energy storage was also examined.
For hydrogen evolution reaction, the selenium-enriched sample with
a small amount of sulfur showed the lowest overpotential of 210 mV
at a current density of 10 mA/cm<sup>2</sup>. Similar behavior was
observed for charge storage performance where the sample with similar
composition showed the highest specific capacitance of 290 F/g.
2020-01-16 18:03:20
Electrocatalytic Energy Conversion
Se
solution
hydrogen evolution reaction
EDX
TEM
precursor
UV
Sb 2
SEM
function
sample
charge storage performance
analysis