Exploring PtAg onto silanized biogenic silica as an electrocatalyst for H2 evolution: A combined experimental and theoretical investigation

Bogireddy, Naveen Kumar Reddy; Ghafour El Hachimi, Abdel; Celaya, Christian A.; Muñiz, Jesús; Thomas, Tijin; Elias, Ana Laura; Lei, Yu; Terrones, Mauricio; Agarwal, Vivechana

doi:10.1016/j.jcis.2024.07.157

Journal of Colloid and Interface Science

2025

DOI: 10.1016/j.jcis.2024.07.157

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Exploring PtAg onto silanized biogenic silica as an electrocatalyst for H2 evolution: A combined experimental and theoretical investigation

Naveen Kumar Reddy Bogireddy,

Abdel Ghafour El Hachimi,

Christian A. Celaya

et al.

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Ultralow-Concentration Pt-Decorated Carbon Sphere Catalyst for Enhanced Hydrogen Evolution Reaction

Bogireddy,

Kesarla,

Elías

et al. 2024

ACS Omega

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Ultralow decoration of platinum nanoparticles (Pt NPs) (0.32 wt %) onto carbon spheres (CS) has been developed for hybrid formation, using hydrothermal heat treatment, followed by chemical reduction of nanoparticles. The successful decoration of CSs bearing amine groups with platinum nanoparticles was confirmed directly by X-ray photoelectron spectroscopy. The uniform distribution and crystallinity of the Pt NPs in the hybrid structures were confirmed from X-ray diffraction spectroscopy and transmission electron microscopy. The hydrogen evolution reaction studied on the proposed Pt-CS hybrids reveals an onset potential of only −144 mV (vs RHE, reversible hydrogen electrode) with a current density of 10 mA/cm 2 under an acidic 0.5 M H 2 SO 4 medium, which exhibits a better performance as compared to a similar Pt-carbon hybrid catalyst reported in the literature. The Pt-CS hybrid stability assessments revealed a minimal overpotential loss (9 mV) from 144 to 153 mV after 200 cycles. Such hybrids have possible applications in environmental water purification and renewable energy production.

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Ultralow-Concentration Pt-Decorated Carbon Sphere Catalyst for Enhanced Hydrogen Evolution Reaction

Bogireddy,

Kesarla,

Elías

et al. 2024

ACS Omega

View full text Add to dashboard Cite

show abstract

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Exploring PtAg onto silanized biogenic silica as an electrocatalyst for H2 evolution: A combined experimental and theoretical investigation

Cited by 1 publication

References 72 publications

Ultralow-Concentration Pt-Decorated Carbon Sphere Catalyst for Enhanced Hydrogen Evolution Reaction

Ultralow-Concentration Pt-Decorated Carbon Sphere Catalyst for Enhanced Hydrogen Evolution Reaction

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