Integration of Nitrogen-Doped Graphene Oxide Dots with Au Nanoparticles for Enhanced Electrocatalytic Hydrogen Evolution
Por:
Reddy Bogireddy, Naveen Kumar, Ghafour El Hachimi, Abdel, Muniz, Jesus, Elias, Ana Laura, Lei, Yu, Terrones, Mauricio, Agarwal, Vivechana
Publicada:
26 nov 2021
Categoría:
Materials science (miscellaneous)
Resumen:
Platinum (Pt)-free catalysts play a significant role in renewable energy
and water purification. However, their design and synthesis are
challenging as they need to satisfy the increasing demands, low cost,
and enhanced catalytic performance with high efficiency to effectively
replace Pt-based materials. This work reports the enhanced catalytic
efficiencies of gold nanoparticles (AuNPs) in the presence of
nitrogen-doped graphene oxide dots (NGODs) for hydrogen evolution in a
0.5 M H2SO4 electrolyte with a Tafel slope of 87 mV dec(-1) and an
overpotential of 145 mV vs RHE at 10 mA cm(-2). In addition, the hybrid
structure reveals the complete removal of organic pollutants with higher
catalytic efficiencies as compared to Pt, Pd, and Rh hybrid catalysts.
DFT calculations demonstrate that the observed high catalytic activity
originates from the oxygen-containing groups present on NGODs and AuNPs.
This study may open new avenues for developing scalable and economically
viable hybrid systems.
Filiaciones:
Reddy Bogireddy, Naveen Kumar:
UAEM, Ctr Invest Ingn & Ciencias Aplicadas, CIICAp Univ Autonoma Estado Morelos, Cuernavaca 62209, Morelos, Mexico
Ghafour El Hachimi, Abdel:
Univ Nacl Autonoma Mexico, Inst EnergIas Renovables IER, Temixco 62580, Morelos, Mexico
Muniz, Jesus:
Univ Nacl Autonoma Mexico, Inst EnergIas Renovables IER, Temixco 62580, Morelos, Mexico
Elias, Ana Laura:
SUNY Binghamton, Dept Phys, Binghamton, NY 13902 USA
Penn State Univ, Ctr Dimens & Layered Mat 2, Dept Phys, University Pk, PA 16802 USA
Lei, Yu:
Penn State Univ, Ctr Dimens & Layered Mat 2, Dept Phys, University Pk, PA 16802 USA
Terrones, Mauricio:
Penn State Univ, Ctr Dimens & Layered Mat 2, Dept Phys, University Pk, PA 16802 USA
Agarwal, Vivechana:
UAEM, Ctr Invest Ingn & Ciencias Aplicadas, CIICAp Univ Autonoma Estado Morelos, Cuernavaca 62209, Morelos, Mexico
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