Journal ArticleDOI
Co-Cu Bimetallic Metal Organic Framework Catalyst Outperforms the Pt/C Benchmark for Oxygen Reduction.
Mohamed Fathi Sanad,Alain R. Puente Santiago,Sarah A. Tolba,Ariful Ahsan,Olivia Fernandez-Delgado,Mina Shawky Adly,Mina Shawky Adly,Elhussein M. Hashem,Mohamed Mahrous Abodouh,M. Samy El-Shall,Sreeprasad T. Sreenivasan,Nageh K. Allam,Luis Echegoyen +12 more
TLDR
In this paper, a nonprecious Co-Cu bimetallic metal-organic framework (MOF) was designed using a low-temperature hydrothermal method that outperforms the electrocatalytic activity of Pt/C for ORR in alkaline environments.Abstract:
Platinum (Pt)-based-nanomaterials are currently the most successful catalysts for the oxygen reduction reaction (ORR) in electrochemical energy conversion devices such as fuel cells and metal-air batteries. Nonetheless, Pt catalysts have serious drawbacks, including low abundance in nature, sluggish kinetics, and very high costs, which limit their practical applications. Herein, we report the first rationally designed nonprecious Co-Cu bimetallic metal-organic framework (MOF) using a low-temperature hydrothermal method that outperforms the electrocatalytic activity of Pt/C for ORR in alkaline environments. The MOF catalyst surpassed the ORR performance of Pt/C, exhibiting an onset potential of 1.06 V vs RHE, a half-wave potential of 0.95 V vs RHE, and a higher electrochemical stability (ΔE1/2 = 30 mV) after 1000 ORR cycles in 0.1 M NaOH. Additionally, it outperformed Pt/C in terms of power density and cyclability in zinc-air batteries. This outstanding behavior was attributed to the unique electronic synergy of the Co-Cu bimetallic centers in the MOF network, which was revealed by XPS and PDOS.read more
Citations
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Novel electrocatalysts for ethylene glycol oxidation based on functionalized phosphates of bimetals Mn/Ni: Morphology, crystallinity, and electrocatalytic performance
TL;DR: In this article , bimetallic phosphates of Mn&Ni were investigated as low-cost phosphate electrodes for ethylene glycol (EG) electrooxidation at high pH (2.0 M NaOH aqueous medium).
Journal ArticleDOI
Cu–Co bimetallic nanocluster Mott–Schottky interaction increasing oxygen reduction reaction activity in rechargeable Zn-air batteries
TL;DR: The Mott-Schottky effect between Cu and Co nanoclusters on 3D nitrogen-doped porous carbon nanosheet frameworks enhances the catalytic activity of the ORR and oxygen evolution reaction (OER) as discussed by the authors .
Journal ArticleDOI
Novel hollow microsphere with porous carbon shell embedded with Cu/Co bimetal nanoparticles: facile large-scale preparation and catalytic hydrogenation performance
TL;DR: In this paper , a hollow spherical supported non-noble bimetal nanocatalyst with porous carbon shell as the continuous matrix and Cu/Co nanoparticles as the dispersion phase is successfully fabricated by a convenient strategy involving spray drying and subsequent heat treatment.
Journal ArticleDOI
Graphene-Isolated Satellite Nanostructure Enhanced Raman Spectroscopy Reveals the Critical Role of Different Intermediates on the Oxygen Reduction Reaction
Jia Li,Shen Wang,Mu-Fei Yue,Shu-Ming Xing,Yue-Jiao Zhang,Jin-Chao Dong,Hua Zhang,Zhuo Chen,Jian-Feng Li +8 more
TL;DR: In this article , the reaction processes of the ORR on graphene supported PtFe nanoalloys have been investigated using in situ enhanced Raman spectroscopy through the fabrication of graphene-isolated satellite nanostructures.
References
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