Enhancement of hydrogen evolution in alkaline water electrolysis by using nickel-rare earth alloys

Enhanced hydrogen evolution reaction on few–layer MoS 2 nanosheets–coated functionalized carbon nanotubes

“…6C) at 161.7 and 163.7 eV corresponds to the S 2p 3/2 and 2p 1/2 orbitals of divalent sulfide ions (S 2À ), respectively. Additionally, the S 2p 1/2 and 2p 3/2 at 164.0 and 163.2 eV suggested the existence of bridging S 2 2À , indicating that Serich MoS 2 structure has been formed [21,34,35,66]. The higheenergy component at 168.7 eV can be ascribed to S 6þ species in sulfate groups (SO 4 2À ) [25,29].…”

“…6B, and one of those at 226.1 eV actually corresponds to S 2s of MoS 2 . The peaks of Mo 3d 5/2 (228.9 eV) and Mo 3d 3/2 (232.2 eV) are [21,34,65]. The shoulder at 236.0 eV can be assigned to MoO 3 , which may be formed during the preparation of the materials [35,46].…”

Molybdenum Carbide Nanoparticles on Carbon Nanotubes and Carbon Xerogel: Low‐Cost Cathodes for Hydrogen Production by Alkaline Water Electrolysis

“…[1,38,39] The Ta fel slope values of the two carbon-supported Mo 2 Ce lectrocatalysts were also lower than that of pure Ni electrodes (b = 130 mV dec À1 ), [40] which are used commonlyf or alkaline water electrolysis, or Ni alloy electrodes, such as Ni 3 Al alloy (b = 219 mV dec À1 ) [39] or Ni-RE (RE = Ce, Dy or Sm) alloys prepared by several different methods. [40][41][42][43] The charge storageb ehaviour of Mo 2 C/CXG and Mo 2 C/CNT in strong alkaline mediaw as examined by cyclic voltammetry (CV). The near-rectangular shapeo ft he CV curves recordedi n 8 m KOH at differents can rates ( Figure 7) showedt he charge accumulation in electric double layer of both electrocatalysts.…”

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

“…It is apparent to nd that the j 0 values of coatings electrodeposited under supergravity elds are much larger compared with the normal one. [30][31][32][33][34][35][36][37][38] Tafel slope b is another important parameter which can provide insights into the HER mechanism on the electrodes and illustrate the rate of j change with h c . The signicantly enhanced catalytic activity of the samples prepared under supergravity elds relative to the normal one can be mainly attributed to the following reasons.…”