TY - JOUR
T1 - Integration of Nitrogen-Doped Graphene Oxide Dots with Au Nanoparticles for Enhanced Electrocatalytic Hydrogen Evolution
AU - Bogireddy, Naveen Kumar Reddy
AU - Ghafour El Hachimi, Abdel
AU - Muñiz, Jesús
AU - Elías, Ana Laura
AU - Lei, Yu
AU - Terrones, Mauricio
AU - Agarwal, Vivechana
N1 - Publisher Copyright:
©
PY - 2021/11/26
Y1 - 2021/11/26
N2 - 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.
AB - 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.
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U2 - 10.1021/acsanm.1c01872
DO - 10.1021/acsanm.1c01872
M3 - Article
AN - SCOPUS:85118747780
SN - 2574-0970
VL - 4
SP - 11513
EP - 11525
JO - ACS Applied Nano Materials
JF - ACS Applied Nano Materials
IS - 11
ER -
