Cathodic activation of synthesized highly defective monoclinic hydroxyl‐functionalizedZrO₂nanoparticles for efficient electrochemical production of hydrogen in alkaline media

Abstract

The high electrochemical stability of Zirconia (ZrO 2) at high potentials strongly suggested it as an alternative to carbon supports, which experience reduced

Production of NF / NiCo /Ag catalyst for hydrogen generation in alkaline medium

“…NF/NiCo‐2/Ag has a higher HPE due to the rougher and larger surface area, as well as the synergistic effect of Ni, Co, and Ag 58,59,61,65 . The following steps comprise the mechanism of hydrogen production on electrocatalyst (E) in alkaline solution 48,66 : where () denotes the proton discharge electrosorption (Volmer reaction), () depicts the electrodesorption step (Heyrovsky reaction), and/or () demonstrates the H recombination step (Tafel reaction). The Volmer ()‐Heyrovsky () and Tafel () reaction mechanisms may have different slopes, according to general models for hydrogen evolution reaction processes: 120, 40, or 30 mV dec −1 at 25°C 48,67‐69 .…”

The Structure, Magnetic, and Gas Sensing Characteristics of W-Substituted Co-Ferrite Nanoparticles

“…The XRD data was analyzed, indexed, and least squares fitted using the software X'Pert High Score Plus. The crystallite sizes (D) and lattice microstrain (ε) were determined from XRD using the Williamson-Hall method [27]:…”

“…A cubic spinel ferrite phase was formed in all samples. The broadening of the diffraction peaks increased with an increasing amount of W-substitution due to a decrease in the particle size or an increase in the defects and the microstrain [15,27]. The lattice parameters of cubic CoFe 2 O 4 with different W-doping were determined from XRD data and they are given in Table 1.…”

“…However, the increase in the lattice parameter and the lattice volume may be partially due to the rearrangement of Co (II) between the tetrahedral and the octahedral sites. The crystallite sizes (D) and the lattice strains (ε) were determined from XRD data using the Williamson-Hall method (W-H) [27]. Details regarding the W-H method were given in our recent publications [15,29].…”

“…lite sizes (D) and the lattice strains (ε) were determined from XRD data using the Williamson-Hall method (W-H) [27]. Details regarding the W-H method were given in our recent publications [15,29].…”