Hierarchical Ni3S2-CoMoS on the nickel foam as an advanced electrocatalyst for overall water splitting

Hierarchical CoMoS3.13/MoS2hollow nanosheet arrays as bifunctional electrocatalysts for overall water splitting

“…53 As shown in Fig. 5c, the Mo 3d high-resolution spectrum of CMM 0.1 shows four peaks; the first peak at 226.4 eV is attributed to S 2s (Mo–S bonds), 54 the peaks at higher binding energies of 229.2 and 232.5 eV are ascribed to Mo 3d 5/2 and Mo 3d 3/2 , demonstrating the presence of Mo 4+ ions in MoS 2 , 48,55,56 and the fourth peak at 235.8 eV corresponds to a high-valence Mo 6+ component. 57 As the Mo doping ratio increased, the characteristic peaks of Mo 3d 5/2 and Mo 3d 3/2 shift to lower binding energies, confirming the lower Mo valence due to electron transfer from Co. 53 In the S 2p spectra (Fig.…”

In situ phosphating of Zn-doped bimetallic skeletons as a versatile electrocatalyst for water splitting

“…FMZP4 exhibits superior catalytic activity, obtaining Z 20 and Z 50 at low cell voltages of 1.72 and 1.79 V, which is comparable with cells based on the Pt/C||IrO 2 electrode as shown in Fig. 6b, as well as the majority of the published electrocatalysts [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50] (Fig. 6d and Table S6, ESI †).…”

Design of cobalt‐iron complex sulfides grown on nickel foam modified by reduced graphene oxide as a highly effect bifunctional electrocatalyst for overall water splitting

“…Zhao, et al constructed a self‐supporting structure electrocatalyst of Ni 3 S 2 ‐CoMoS x /NF, which exhibited only 234 and 90 mV for HER and OER at the current density of 10 mA·cm −2 . In addition, the as‐prepared Ni 3 S 2 ‐CoMoS x /NF also showed excellent performance with the current density of 10 mA·cm −2 at only 1.52 V, as well as remained stability for 65 hours in the process of overall water splitting 39 . The aim for furtherly improving HER and OER performance of transition metal sulfides, transition metal heteroatom doping has been verified to be one kind of most effective means by improving the electrocatalytic activities due to the increasing transition metal active sites and the adjustment of electron structures 40 .…”

“…In addition, the as-prepared Ni 3 S 2 -CoMoS x /NF also showed excellent performance with the current density of 10 mAÁcm À2 at only 1.52 V, as well as remained stability for 65 hours in the process of overall water splitting. 39 The aim for furtherly improving HER and OER performance of transition metal sulfides, transition metal heteroatom doping has been verified to be one kind of most effective means by improving the electrocatalytic activities due to the increasing transition metal active sites and the adjustment of electron structures. 40 electrochemical materials, for example graphite, graphene, graphene oxide, carbon black and carbon nanotubes, can be applied to collect charges effectively, which is aimed to improve the adhesion of transition metal sulfides with graphite carbon carriers.…”