Hydrogen evolution on hot and cold consolidated Ni–Mo alloys produced by mechanical alloying

Ni–CeO2 composite cathode material for hydrogen evolution reaction in alkaline electrolyte

“…Ce has only 1 d orbital electron, which has several half-filled and empty d orbitals. An adsorptive bond can be formed between Ce and H. So a possible synergetic effect between the CeO 2 particles and Ni matrix can enhance the migration of the reduced H atoms from Ni surface to CeO 2 , and this effect can lead more available Ni sites for further dissociation of water molecules [17,23,48,49]. As a result, much improved higher electro-catalytic activity can be obtained on the NieCeO 2 composite electrodes, relative to Ni.…”

“…It is well-known that nickel and Ni-based alloys exhibit good electro-catalytic activity for HER and sufficient corrosion resistance in alkaline solution [18]. The HER on Ni-based alloys such as NieP [19,20], NieCo [21,22], NieMo [13,23] and NieS [24,25] have been studied in different electrolyte. Importantly, compared to its alloys, the Ni-based composite materials containing active solid particles have been received more and more attention as new electro-catalytic candidates, such as NieMoO 2 , NieMoO 3 [26,27], NieMo powder [16], Ni-rare earth (RE) compounds [18] and Ni-polyaniline [9] composite electrodes.…”

Structure Studies on Mechanically Alloyed Ni50Ti50-xMox (x=10, 25, 40 at.%) Systems during Milling and after Annealing

“…1b). The presence of unreacted Mo in milled powder might be a result of a low solubility of Mo in Ni (about 17 at.%) at room temperature [5]. The addition of 10 at.% of Ti instead of Mo does not cause major changes in phase composition of milled powder, as shown in diffraction pattern of Ni 50 Ti 10 Mo 40 (Fig.…”

“…Ni-Ti and Ni-Mo systems obtained by mechanical alloying have been widely studied as they are very important materials for biomedical applications, corrosion protection, and for catalysis [1][2][3][4][5]. Mechanical alloying is a promising method for synthesizing and processing of these alloys which results in nanocrystalline or amorphous materials exhibiting attractive physical, mechanical, and chemical properties [6].…”

Investigation of oxygen reduction in alkaline media on electrocatalysts prepared by the mechanical alloying of Pt, Co, and Ni

“…MA consists of welding, fracturing, and re-welding until one or several phases in or out of equilibrium are obtained [18][19][20]. Several electrocatalysts prepared by MA have been reported [21][22][23]. Attractive features of MA include the ability to produce nanometric particles and the alloying of metals that are very difficult to combine by conventional metallurgical processes as well as the ability to extend solid solubility limits and to induce solid-state reactions at low temperature.…”