Synthesis and characterization of macroporous Ni, Co and Ni–Co electrocatalytic deposits for hydrogen evolution reaction in alkaline media

Synthesis and characterization of Au-modified macroporous Ni electrocatalysts for alkaline water electrolysis

“…Macroporous Ni electrodes have been obtained by means of electrodeposition at high current densities as it is described in our previous work [10], and briefly summarised as follows. First, the stainless steel AISI 304 substrate material is polished until mirror surface and cleaned with NaOH (degreased) and HCl (stripping).…”

“…One of the most tested cathodes for alkaline water electrolysers are Ni-based alloys, such us NiCo [7][8][9][10][11], NiFe [12][13][14][15], NiMo [12,[16][17][18][19][20][21][22][23][24], NiW [12,19,25,26], NiCu [27], NiAl [28,29], NiZn [30,31]; due to the relatively high catalytic activity of Ni, and aiming at the synergism in the catalytic behaviour of the different components in the metallic alloy.…”

A novel approach for the preparation of Ni–CeO2 composite cathodes with enhanced electrocatalytic activity

“…Up to now, Ni and Ni-based electrode materials have been widely studied and considered as the most suitable candidates due to their high activity and good stability for HER in alkaline solutions, such as Ni-Mo, 11,12 Ni-Co, 13,14 Ni-W. 15,16 Recently, Nibased composite coatings containing active solid particles have also shown excellent electrocatalytic activity for HER and attracted more and more attention, such as Ni-MoO 3 , Ni-MoO 2 , 17,18 Ni-RuO 2 , 19 Ni-polyaniline 20 and Ni-rare earth (RE) compounds 21 composite electrodes. The embedded active solid particles in Ni matrix can signicantly facilitate the formation of nanocrystalline, the increase of the surface area of coating, and the enhancement of the intrinsic activity of materials.…”

N-doped carbon@Ni–Al2O3 nanosheet array@graphene oxide composite as an electrocatalyst for hydrogen evolution reaction in alkaline medium

“…To improve the electrocatalytic activity of non-noble metals, two main approaches are used in the literature: first, change the extrinsic property of electrocatalysts, for example, enhancing the surface area through changing the morphologies [5] or controlling the size [6] of the electrocatalysts; second, change the intrinsic property of the electrocatalysts, for example, changing the alloy composition [7,8] or coupling different multifunctional materials together [9e14] to change the electron configuration of the electrocatalysts. Moreover, effort has been devoted to change the extrinsic and intrinsic properties simultaneously to enhance the HER electrocatalytic activity of electrocatalysts.…”