Hierarchically designed CoMo marigold flower-like 3D nano-heterostructure as an efficient electrocatalyst for oxygen and hydrogen evolution reactions

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

“…6,7 However, it still faces two big challenges: the sluggish OER process results in a higher overpotential in practice (theoretical voltage: >1.23 V); and there is heavy dependence on expensive and scarce noble-metal-based catalysts. [8][9][10][11] It is well known that the HER and OER processes are surface-dependent reactions, mainly depending on the H* and OH* adsorption free energy values (ΔG H* and ΔG OH* ), interfacial charge transfer, and the desorption of intermediates. The prime influencing factors are usually the composition, structure, morphology, and electronic state of a catalyst.…”

Synergistically Coupled CoMo/CoMoP Electrocatalyst for Highly Efficient and Stable Overall Water Splitting

“…Figure b clearly compares the overpotentials at both 10 and 50 mA cm –2 current densities and clearly shows that a lower overpotential is required for CoMo/CoMoP/NF. The current OER electrocatalytic activity of CoMo/CoMoP/NF is superior to many recently reported novelty OER catalysts (Figure h), such as Ce-doped CoMoP/MoP@C (287 mV), Ni-Cu-P@Ni-Cu (270 mV), and Co-Mo 2 C@NC (338 mV), and so on. ,,,,,− In addition, we further compared the properties of CoMo/CoMoP/NF with monometallic phosphide/alloy as well as investigated the effect of different alloy ratios (different electrodeposition times) on the performance of the samples. As shown in Figure S9, the CoMo/CoMoP/NF electrocatalyst still shows absolute advantages in terms of both HER and OER, indicating the superiority of the bimetallic phosphides and the importance of a suitable interface for the catalytic activity.…”

Recent developments in layered double hydroxide structures with their role in promoting photocatalytic hydrogen production: A comprehensive review

“…They were noticed to be highly active and very efficient in driving the catalytic reaction due to the presence of unsaturated CoO6-x octahedron, which is highly exposed on the surface of the LDH, thus providing abundant active sites for carrying out the redox reaction. 238,239 On the other hand, other metal cations might not be suitable for the formation of hydrotalcite structure of LDH, and some reported to be affected by several factors, making the preparation process difficult. Previous studies disclosed that the incorporation of other divalent metal cations such Cu 2+ into the LDH matrix was not highly effective.…”