NiSn and porous NiZn coatings for water electrolysis

Electrocatalytic activity of simple and modified Fe–P electrodeposits for hydrogen evolution from alkaline media

“…At 298 K, it is apparent that a higher rate of the HER can be obtained on the Fe 94 P 4 Ce 2 electrode without suffering a higher increase of overpotential as that commonly reported for mild steel cathodes [48]. Improved performance for the HER on the Fe 94 P 4 Ce 2 electrode, particularly when compared to the Fe 87 P 13 alloy is also confirmed by the higher current density at À200 mV overpotential (i À200 ¼ 23.7 mA cm À2 ).…”

Ni–Sn coatings as cathodes for hydrogen evolution in alkaline solution. Chemical composition, phase composition and morphology effects

“…In the work of Santos et al [11] it was shown that electrodeposited NieSn alloy coatings possess low overvoltage for HER in alkaline solution, although the correlation between the characteristics of the alloys and the ability for hydrogen evolution has not been discussed. More detailed investigation of the electrodeposition conditions (bath composition, temperature, current density, etc.)…”

Microstructure and hydrogen evolution catalytic properties of Ni-Sn alloys prepared by electrodeposition method

“…They indicated that the Ni-Sn alloy shows good chemical stability and service life in alkaline water electrolysis. The hydrogen overpotential was lower than 120 mV for the Ni-Sn alloy, which was measured in 11 mol L −1 NaOH at a current density of 30 A dm −2 and temperature of 90 • C. Santos [12] also reported that the electroplated Ni-Sn alloys exhibit low overpotential for the HER in alkaline solution. A recent report [14] demonstrated that the chemical composition, phase composition and morphology of the Ni-Sn alloy coatings depend on the deposition current density, and furthermore, the overpotential for the HER was found to depend on chemical and phase composition to a smaller extent and mainly to the roughness of deposited Ni-Sn alloy coatings.…”

“…In addition, some literatures [11][12][13][14][15] have reported that the electrodeposited Ni-Sn alloys possess high catalytic properties for HER than Raney-Ni electrode. Yamashita et al [11] investigated the relationship between the catalytic activity for HER and characteristics of the Ni-Sn alloy prepared by electroplating.…”