Kinetics of hydrogen evolution reaction on skeleton nickel and nickel–titanium electrodes obtained by thermal arc spraying technique

Easily-prepared dinickel phosphide (Ni2P) nanoparticles as an efficient and robust electrocatalyst for hydrogen evolution

“…Faradaic yield for H 2 = Q/2xF. [7] Mo 2 C 1 M KOH 0.8 mg/cm 2 0.21 V 54 [7] NiZn 1 M NaOH --0.25 V 119 [11] NiZr 6 M KOH --0.30 V 110 [12] Porous Ni 3 Al 6 M KOH --0.25 V -- [13] NiTi 1 M NaOH --0.17 V 283 [14] Ni . The particles were removed from the electrode before analysis.…”

Facile synthesis of porous 3D CoNiCu nano-network structure and their activity towards hydrogen evolution reaction

“…The R f of electrodes can be determined by comparison of the double layer capacitance with 20 mF cm À2 for smooth Ni surface. The R f of the Co 11 Fig. 4c was 151, 115, 98 and 2.2, respectively.…”

“…The normalized current density of CoNiCu alloys is lower than Pt. However, our present i 0 /R f ratio are higher than the recent report for Ni (1.08 Â 10 À3 mA cm À2 ) and Ni þ Mo (3.79 Â 10 À3 to 8.33 Â 10 À3 mA cm À2 ) in 5 M KOH, [12], or skelton NiTi (1.94 Â 10 À5 A cm À2 ), skelton Ni (8.35 Â 10 À7 A cm À2 ) and smooth Ni (1.29 Â 10 À6 A cm À2 ) in 1 M NaOH [11] …”

“…However, their large scale application is strictly restricted by their high cost and low mineral storage on earth. Some low-cost metal or alloys such as Ni, [5,6], NiCo [6,7], NiCu [8], CuNiZn [9], CoNiFeC [10], NiTi [11] Ni þ Mo [12] and NiAlMo [13] have been explored as alternatives. Nickel and its alloys are considered to have high initial electrocatalytic activity (low hydrogen overpotential) [6,9,14À17], which may lead to low overpotential and reduce the cost in electrolytic hydrogen production.…”

Electrocatalytic activity of porous Ni–Fe–Mo–C–LaNi5 sintered electrodes for hydrogen evolution reaction in alkaline solution

“…Considering Table 3 The fitted parameters values of the equivalent for hydrogen evolution reaction on different temperature and different potential a value of 20 mF cm À2 for the double layer capacitance, C dl , of a smooth nickel surface area, in term of surface roughness factor (R f ), may be estimated by comparing the C dl related to the HER charge-transfer kinetics of porous/rough and smooth electrodes. 72,73 The plots of the electrode surface roughness factors as function of the HER overpotential are displayed in Table 4.…”