NiMoO4 @Co3S4 nanorods with core-shell structure for efficient hydrogen evolution reactions in electrocatalysts

Synthesis of NiMoO4/NiMo@NiS Nanorods for Efficient Hydrogen Evolution Reactions in Electrocatalysts

“…The remaining two broad peaks at 861.2 and 882.4 eV were designated as Ni 2+ satellite peaks [ 44 ], respectively. Likewise, the observed results obviously indicate that NiMoO 4 /NiMo is composed of different valence states, including Ni 2+ , Mo 6+ , Ni 0 and Mo 0 [ 43 , 44 , 45 , 46 ], and these groups are tightly linked to create the alloys NiMoO 4 and NiMo. The Mo peak values in the Mo 3d spectrum were found at 232.2 and 235.3 eV.…”

“…The crystal plane of NiMoO 4 was identified as (2 4 1) based on the peak observed at 45.74°. (PDF#45-0142) [ 43 , 44 ]. The characteristic peak for the (2 2 0) crystal plane of NiS (PDF#48-1745) appeared at a diffraction angle of 38.29°.…”

“…Compared with foam nickel, NF/NiMoO 4 /NiMo significantly increased the specific surface area and the number of active sites on the material; this provides an increased number of active sites for the subsequent growth of NiS. The optimal conditions for the growing NiMoO 4 /NiMo on the surface of NF are a reaction temperature of 150 °C and a time of 6 h [ 43 ]. The NiMoO 4 /NiMo structure prepared by this method was stable and uniformly distributed.…”

“…Figure 5 a displays the complete spectrum indicating the locations of the C, Ni, Mo, O, and S elements, which corroborates with the EDS testing outcomes. In Figure 5 b, the three peaks were positioned at 284.7, 285.7, and 288.9 eV, with the binding energies in accordance with the C-C/C=C, C-O, and O-C=O bonds [ 43 ], respectively, which were produced by the growth of NiMoO 4 /NiMo@NiS on NF. The source of these peaks is caused by the addition of disodium citrate dihydrate in electrochemical deposition.…”

Recent advances in Ni-materials/carbon nanocomposites for supercapacitor electrodes

“…3, electrodes based on Ni materials and carbon nanomaterials are prominent keywords. Recently, nanocomposites of Ni materials with carbon nanomaterials as supercapacitor electrodes such as NiCo 2 S 4 /graphene, 6 Ni(OH) 2 /graphene, 7 NiCo 2 O 4 /graphene, 8,9 Ni-Co/graphene, [10][11][12][13][14][15][16][17] NiMoO 4 /graphene, [18][19][20] Ni(OH) 2 /CNTs, 21,22 Ni-Co/CNTs, [23][24][25] NiCo 2 S 4 /CNTs, [26][27][28][29] Ni-Co/porous carbon, 30 NiCo 2 S 4 /porous carbon, 31 NiCo 2 O 4 //AC, 32 Ni-Co//AC, [33][34][35][36] Ni(OH) 2 //AC, 37 and other materials have been developed.…”