Co/Co9S8@S,N-doped porous graphene sheets derived from S, N dual organic ligands assembled Co-MOFs as superior electrocatalysts for full water splitting in alkaline media

The Design of a New Cobalt Sulfide Nanoparticle Implanted Porous Organic Polymer Nanohybrid as a Smart and Durable Water‐Splitting Photoelectrocatalyst

“…In order to interpret the intrinsic synergistic effect we have conducted high resolution XPS spectrum analysis at N1sa nd Co 2p regions, respectively.C ompared to the XPS spectrum of pure Co 9 S 8 (781.7 and 797.3 eV), as hift in the bindinge nergies of Co 2p to the corresponding lower value in CoS x @POP is observed, attributed to as trong interaction between Co 9 S 8 and POP caused by the intrinsics ynergistic effect between Co and POP by charge transfer of electrons (Figure 6c). [46] It is worth mentioning here that the photo- current recorded with CoS x @POP photocathode is found to be comparable to many recently reported photocathodes comprised of polymer and/or cobaltc halcogenides. Figure 7a shows the current density-potential responses of the CoS x @POP heterocomposite photocathode in 0.5 m Na 2 SO 4 solution at pH 6.5 under simulated solar illumination of 1.5 AM.…”

“…Similarly,t he positive displacement in the binding energies in the N1Ss pectrum of CoS x @POP compared with the bare POP demonstrated the interaction between the N-rich POP and cobalt sulfide nanoparticles which builds a" bridge"f or the charge transfer between POP and Co 9 S 8 (Figure 6f). [22,45,46] The reversibility of the photoactivity of the as-prepared photocathodes was investigated using amperometricm easurements at relativelyh igher appliedv oltage of À0.7 Vv ersus RHE. For the sake of completeness of the experiment, Co 3 O 4 @POP, CoS x and spinel Co 3 O 4 species were takena sc ontrols.…”

Co9S8‐Catalyzed Growth of Thin‐Walled Graphite Microtubes for Robust, Efficient Overall Water Splitting

“…However,t he high cost and limitedr eserves of noble metals greatlyp rohibit their largescale commercial applications. [16][17][18] Generally,c arbonbased catalysts are in the form of fine powders, tested by drop-coating on glass carbon electrodes or nickel foamsb y using ap olymer binder (such as Nafion). [8][9][10][11][12] Co 9 S 8 is ap romising materialt hat has been demonstrated to have superb electrochemical performance for a varietyo fa pplications,f or instance, lithium-ion ands odium-ion batteries, supercapacitors, HER, and OER.…”

Rational Microstructure Design on Metal–Organic Framework Composites for Better Electrochemical Performances: Design Principle, Synthetic Strategy, and Promotion Mechanism

“…Interestingly, the nanocomposites with heteroatoms self‐doped nanocarbons can be synthesized by employing the heteroatoms‐containing ligands. By using the sulfur‐containing thiophene‐2,5‐dicarboxylate (Tdc) and nitrogen‐containing 4,4′‐bipyrydine (Bpy) simultaneously, the S, N‐Co‐MOF/GO was formed, which was transformed into Co/Co 9 S 8 core–shell structures on S,N‐codoped porous graphene sheets by simply annealing in N 2 under high temperature without use of other S and N sources …”