Ni₅₀Mo₄₀Ti₁₀ alloy prepared by mechanical alloying as electroactive material for hydrogen evolution reaction

Abstract

The subject of this work is Ni50Mo40Ti10 alloy produced by mechanical alloying and subsequent heat treatment. The obtained material was tested as electrode for the hydrogen evolution reaction (HER) in an alkaline environment. The results were compared with those obtained for the Ni50Mo50 catalyst. Electrochemical characterization was carried out by the steady‐state polarization method and the electrochemical impedance spectroscopy (EIS). On the basis of the results of the EIS measurements, the average rate constant of the HER was determined. The calculated values of surface roughness factor, Rf, allowed to evaluate the true catalytic effect of the investigated electrode material. It was stated that Ni50Mo40Ti10 alloy annealed at 1173 K exhibits the higher electrocatalytic activity for the HER compared with the Ni50Mo50. The increase in the intrinsic activity could be attributed to the presence of NiMo intermetallic phase and Ni(Ti) solid solution. Copyright © 2014 John Wiley & Sons, Ltd.

Synthesis, Characterization and Investigation of Hydrogen Evolution Activity of Ni‐Mo/Al2O3 Composite

“…It should be noted that the Ni80Mo20 catalyst is reported to have the highest activity of hydrogen release among the other compounds of this catalyst. [24] CoP 1.37 Se 0.63 , [25] Ni 50 Mo 50 , Ni 50 Mo 40 Ti 10 , [26] (Co + Ni)Go, [27] MoP/carbon black, [28] MoP/Ti [29] ).…”

Peculiarities of fullerenes and carbon onions application for reinforcing the aluminum matrix in the metal matrix composites

“…Combinations of initial components of composites were as follows: (a) 2.9 g Al + 0.1 g fullerenes (approximately 5%vol); (b) 2.65 g Al + 0.35 g fullerenes (approximately 16%vol); (c) 2.55 g Al + 0.45 g fullerenes (approximately 20%vol); and (d) 2.6 g Al + 0.4 g carbon onions (approximately 16%vol). Composite granules were formed through mechanical alloying, which was executed in a planetary mono‐mill Pulverisette 6 (FRITSCH GmbH). The grinding jar volume was 80 mL; chromium steel balls with a diameter of 5 mm were used as grinding tool.…”

“…Commercially available aluminum powders were applied for the composite matrix formation. The following powders were used as reinforc- [20][21][22] which was executed in a planetary mono-mill Pulverisette 6 (FRITSCH GmbH). The grinding jar volume was 80 mL; chromium steel balls with a diameter of 5 mm were used as grinding tool.…”

Microstructure Characterization and Wear-Resistant Properties Evaluation of an Intermetallic Composite in Ni–Mo–Si System

“…As a binary intermetallic compound, NiMo was given more interest for its thermodynamic properties in the past couple of years [10,11,12]. Little attention was focused on its mechanical properties, especially on wear-resistance [13,14].…”