To evaluate supports’ effects on catalytic activity toward the oxygen reduction reaction (ORR), a simple and controlled chemical synthesis, involving hot injection of metal precursors, was developed to produce bimetallic PtNi nanoparticles (75 wt.% Pt 25 Ni), supported carbon nanotubes (CNTs) nanofibers (CNFs). The synthesized electrocatalyst characterized using X-ray diffraction (XRD), energy ...

A new bimetallic nanocomposite of chitosan was prepared. Pd and Co nanoparticles were deposited on chitosan to produce a new heterogeneous recyclable catalyst for use in the bimetallic catalytic reduction reaction. The catalyst was characterized with common analysis methods for nanocomposites including Energy Dispersive X-Ray Spectroscopy, X-Ray Diffraction pattern, Thermal Gravimetric Analysis...

Dealloyed Pt core-shell nanoparticles constitute the most active and stable bimetallic oxygen reduction catalysts for low-temperature fuel cells. Here, we review recent advances on their preparation, structural characterization, and electrocatalytic performance. Starting with bimetallic metal overlayer model systems, for which we illustrate fundamental principles of the ORR activity enhancement...

The cathodic material plays an essential role in oxygen reduction reaction for energy conversion and storage systems. Titanium dioxide, as a semiconductor material, is usually not recognized as an efficient oxygen reduction electrocatalyst owning to its low conductivity and poor reactivity. Here we demonstrate that nano-structured titanium dioxide, self-doped by oxygen vacancies and selectively...

Non-noble-metal-based nanomaterials can exhibit extraordinary electrocatalytic performance toward the oxygen evolution reaction (OER) by harnessing structural during catalysis and synergistic effect between elements. However, structure of active centers in bimetallic/multimetallic catalysts is under long-time debate community. Here, an efficient bimetallic Ni–Fe selenide-derived OER electrocata...

Nitrite contamination of groundwater is a concerning consequence anthropic activity. The electrochemical detection nitrite in water based on direct electrocatalytic oxidation over modified electrodes. However, drawbacks associated to the high potential required, oxide layer formation, and O2 interference are present. Considering recent availability low cost platinum-group-metal-free (PGM-free) ...