Exploring the capability of doped nano CuS for efficient hydrogen production during NaBH4 methanolysis
Cu 0.98 V 0.02 S and Cu 0.96 V 0.02 M 0.02 S (M ≡ Co, Mg, Mn, Ni) samples were created using the solid reaction method at low temperature. The search match program X’Pert HighScore Plus was used to identify the different phases in each sample. The phase proportions of the two phases identified, Cu 1...
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Veröffentlicht in: | Applied physics. A, Materials science & processing Materials science & processing, 2025, Vol.131 (3), Article 158 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Cu
0.98
V
0.02
S and Cu
0.96
V
0.02
M
0.02
S (M ≡ Co, Mg, Mn, Ni) samples were created using the solid reaction method at low temperature. The search match program X’Pert HighScore Plus was used to identify the different phases in each sample. The phase proportions of the two phases identified, Cu
1.8
S and CuS, along with their structural parameters were determined applying Rietveld refinement analysis. The transmittance electron microscope technique revealed that the samples have homogeneous particle morphology with spherical shape and size ranging from 7 to 30 nm. Raman analysis indicates the incorporation of the transition metals inside the copper sulfide lattices replacing Cu substitutional at its different crystallographic sites, at least partially. The optical absorbance spectra of all samples were obtained using the diffuse reflectance technique. All samples have the potential to effectively harness visible light. All samples have two optical band gaps. With the introduction of various metals (Co, Mg, Mn, Ni) to Cu
0.96
V
0.02
M
0.02
S samples, the primary band gap of the Cu
0.98
V
0.02
S sample is reduced to 1.36, 1.44, 1.31, and 1.41 eV for Co, Mg, Mn, Ni, respectively. The secondary band gap value undergoes minimal variations ranging from 0.63 to 0.66 eV based on the dopant element utilized. The outcomes of experiments on hydrogen evolution involving nano- Cu
0.96
V
0.02
M
0.02
S samples as a catalyst derived from the methanolysis of NaBH
4
process are performed. The impact of Cu
0.96
V
0.02
Co
0.02
S nanoparticles on the hydrogen rate of generation is also determined. The maximum generation rate is detected for the Cu
0.96
V
0.02
Co
0.02
S sample at 50,220 mL min
− 1
g
− 1
, which manifested excellent recyclability. The activation energy of Cu
0.96
V
0.02
Co
0.02
S in the methanolysis of NaBH
4
was calculated to be
kJ/mol applying the Arrhenius equation. |
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ISSN: | 0947-8396 1432-0630 |
DOI: | 10.1007/s00339-025-08250-2 |