Ultrafine Co₃O₄ nanoparticles-engineered binary metal nitride nanorods with interfacial charge redistribution for enhanced water splitting

Abstract

Herein, an efficient bifunctional electrocatalyst based on binary metal nitride (Zn3N2-Co2N) nanorod arrays decorated with a monolayer of ultrathin Co3O4 nanoparticles is prepared to improve overall water splitting performance. Notably,...

NiFe-Based Semi-MOF Embedded by Sulfide Particles Reconstructed a Three-Layer Sandwich Structure for Alkaline Overall Water Splitting

“…It can be inferred that the electrons in the catalyst system moved from Fe and Ni to Co during the vulcanization process, resulting in Co acting as the electron donor of electron-deficient Fe and Ni. The strong charge interaction between the three metal sites further signified the successful construction of the TMS/MOF heterogeneous structure, which effectively adjusted the local electron configuration of the catalyst. − This tunable electronic property can be attributed to (1) the coupling between TMS and MOF due to the coexistence of S 2– sparking strong interfacial interactions, , (2) the electronegativity difference between S in the TMS and O in the MOF (S: 2.58, O: 3.44) showing different abilities to attract electrons, or (3) the Co element having flexible and controllable valences (Co 2+ and Co 3+ ), which is conducive to the transfer of electrons. In conclusion, the S coordination in Co@Ni/Fe-MS/MOF increased the proportion of high-valence Fe and Ni, which are often considered to be highly active sites .…”

Ni–Mo nitride synthesized via mild plasma for efficient alkaline hydrogen evolution electrocatalysis

“…10 TMNs show improved catalytic performance compared to their parent metals for several types of reactions such as hydrogenation. 11–13 For HER electrocatalysis in particular, the nitrides of transition metals such as Ni and Mo demonstrate comparable or even superior performance to noble metal catalysts. 14–17 The remarkable HER activity of these TMNs in alkaline electrolytes is believed to stem from the promoted water dissociation due to their unique electronic structures.…”