Low-cost and highly efficient CoMoS4/NiMoS4-based electrocatalysts for hydrogen evolution reactions over a wide pH range

Abstract

Highly efficient and low-cost electrocatalysts are essential for producing hydrogen through water electrolysis. Here ternary compounds CoMoS 4 and NiMoS 4 were synthesized by a one-step reaction, and further CoMoS 4-H and NiMoS 4-H were obtained by heating the above two samples under Ar atmosphere. The above four materials both show uniformly small irregular nanoparticles. Each element of the four materials exhibits semblable valence without distinct difference of which S was-2, Mo was +6, Ni and Co were +2. We firstly use the above ternary materials as advanced electrocatalysts for HER over a wide pH range, of which CoMoS 4-H displays the best performance with a low onset overpotential at 8 mV in 1.0 M KOH and 83 mV in 0.5 M H 2 SO 4. NiMoS 4-H also shows excellent performance with a low onset overpotential at 26 mV in 1.0 M KOH and 160 mV in 0.5 M H 2 SO 4. In 1 M phosphate buffer solution, CoMoS 4-H and NiMoS 4-H exhibit onset overpotential at

Synthesis of NiMoS4for High-Performance Hybrid Supercapacitors

“…It is supposed that the interaction between the MoS2 and NiS2 components could promote the activity and improve its conductivity. 23 Our impedance results have also confirmed the lower resistance of NiMoS4-A.…”

Self-supported CoMoS4 nanosheet array as an efficient catalyst for hydrogen evolution reaction at neutral pH

“…This electrode also demonstrates excellent long-term electrochemical durability and a high TOF (1.13 s -1 , η = 600 mV) for HER. This study not only provides an attractive earth-abundant catalyst for efficient HER, but also paves a new way to the rational design and scalable self-templating fabrication of metallic thiomolybdate nanoarrays for a wide range of applications [63][64][65][66].…”

Engineering Ternary Pyrite‐Type CoPS Nanosheets with an Ultrathin Porous Structure for Efficient Electrocatalytic Water Splitting

“…It is notable that CoPS UPNSs are highly active for HER in neutral electrolyte with an overpotential of 235 mV to drive 10 mA cm À 2 current density, which is much lower than that of bulk CoPS (402 mV), CoP (314 mV), and CoS 2 (392 mV). The HER performance of CoPS UPNSs is superior to those of reported non-precious HER catalysts under neutral conditions, including Co-NRCNTs, [49] CoMoS 4 , [50] and CoO/CoSe2/Ti. The HER performance of CoPS UPNSs is superior to those of reported non-precious HER catalysts under neutral conditions, including Co-NRCNTs, [49] CoMoS 4 , [50] and CoO/CoSe2/Ti.…”

“…As shown in Figure 4f, the Tafel slopes are 40.3, 107.2, 130.8, 142.3, and 160.8 mV dec À 1 for Pt/C, CoPS UPNSs, CoS 2 , CoP, and bulk CoPS, respectively. The HER performance of CoPS UPNSs is superior to those of reported non-precious HER catalysts under neutral conditions, including Co-NRCNTs, [49] CoMoS 4 , [50] and CoO/CoSe2/Ti. [51] Compared with the bulk CoPS, the CoPS UPNSs exhibit higher HER activity resulting from its ultrathin porous structure.…”