CuAu bimetallic plasmonic-enhanced catalysts supported on alginate biohydrogels

Ramírez, Oscar; Bonardd, Sebastián; Saldías, César; Zambrano, Yadira; Díaz, David Díaz; Leiva, Ángel

doi:10.1016/j.carbpol.2022.120021

Cited by 10 publications

(3 citation statements)

References 54 publications

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“…The nanoparticles obtained by this method presented diameters of approximately 10.8 ± 2.6 and 21.7 ± 6.8 nm (Fig. 2b), values that are similar to previous results obtained for the synthesis of Cu-Au nanoalloys presented by our group [34]. Analyzing the samples by EDX analysis, we found signals corresponding to the presence of both metals in the material with an adequate dispersion of both metals over the sample (Figure S2) and close to the nominal designated copper percentage (Fig.…”

Section: Resultssupporting

confidence: 90%

Marrying plasmonic earth-abundant metals with catalytic metals for visible-light- promoted hydrogen generation on biobased materials

Ramírez

Castillo

Bonardd

et al. 2023

Preprint

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Bimetallic CuPt alloyed nanoparticles were conveniently synthesized on biohydrogels and were capable of carrying out hydrogen release from ammonium borane hydrolysis. The biohydrogel consisted of bead-shaped alginate chains crosslinked by calcium ions, which were used as support material to synthesize and stabilize the bimetallic nanoparticles, employing adsorption and coreduction strategy steps. The as-prepared nanoparticles exhibited light absorption in the visible range (580 nm) resulting from the surface plasmon resonance (SPR) phenomenon ascribed to the presence of copper in the alloyed system. On the other hand, the presence of platinum atoms in these nanoalloys endows them with a notable catalytic performance toward ammonia borane hydrolysis as a hydrogen release reaction, reaching kr values from 0.32 x 10-4 to 2.23 x 10-4 mol L-1 min-1 as the Pt content increases. Finally, by taking advantage of the SPR light absorption shown by CuPt 1:1, it was demonstrated that these entities could be successfully employed as photocatalysts for the hydrogen generation reaction, boosting its activity by almost 2.06 times compared to its performance in dark conditions. This catalytic enhancement was mainly ascribed to the plasmonic-derived light-harvesting properties and the specimen's metallic composition.

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Section: Resultssupporting

confidence: 90%

Marrying plasmonic earth-abundant metals with catalytic metals for visible-light- promoted hydrogen generation on biobased materials

Ramírez

Castillo

Bonardd

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…171 Each characterization technique can provide specic information about both hybrid microgels and their corresponding microgels. Advanced microscopic techniques, like AFM, TEM, FE-SEM, 158 and SEM, can be employed to analyze microgel particles and their hybrids as well as their physical appearances. TEM can be used to investigate the size distribution, morphology, and size of both hybrid microgels and pure microgels, as shown in Fig.…”

Section: Characterization Techniquesmentioning

confidence: 99%

“…The size and distribution of the MNPs can be perfectly controlled by this method. Both monometallic (such as Au, 43 Ni, 153 Pt, 130 Co, 123 Ag, 119 Cu, 154 Pd, 155 Rh, 133 Fe, 156 Ru 135 ) and bimetallic (including Pd, 139 Ni, 76 Pt, 89 Co, 157 Ag, 94 Cu, 158 Au 82 ) hybrid microgels have been synthesized using similar approaches, as documented in the literature. The drawback of this approach is that core–shell hybrid microgels are not prepared.…”

Section: Synthesismentioning

confidence: 99%