Puzzle-inspired carbon dots coupled with cobalt phosphide for constructing a highly-effective overall water splitting interface

Abstract

The unique bamboo-like CDs/CoP nanoarray is beneficial to produce more H radicals and accelerate water decomposition.

Self-Supported CdP2–CDs–CoP for High-Performance OER Catalysts

“…Figure 2f As shown in Figure 3a, no peak is observed in the Raman spectra of CoP, while a pair of typical carbon peaks centered at 1428 and 1646 cm −1 appear in the CdP 2 −CDs−CoP spectrum. 25 These peaks indicate that CDs were in situ combined with CoP during the preparation process, which is attributable to the abundant negative functional groups of CDs that can bind well with Co 2+ and Cd 2+ . Such binding limits the aggregation of CoP and CdP 2 , creates abundant active sites, and enhances the conductivity of the composite arrays.…”

Halogen‐Doped Carbon Dots on Amorphous Cobalt Phosphide as Robust Electrocatalysts for Overall Water Splitting

“…41‐1487). [ 37 ] To further investigate the mechanism, only urea and ammonium fluoride were added during the hydrothermal process, and the resulting F‐CDs were verified by X‐ray photoelectron spectroscopy (XPS) and TEM. Their elemental composition from XPS was C, N, O, and F (Figure S5, Supporting Information), indicating that F‐CDs formed during the hydrothermal process.…”

“…[ 33 ] Moreover, doping/modification using heteroatoms (e.g., N, P, F, or Cl) can enhance the electronic interaction between the CDs and the metal, promote electron transfer, and further improve the catalytic performance of the composite material. [ 34–37 ] Note that halogens are used as powerful structural regulators in crystal engineering and other fields owing to their high specificity and directionality. [ 38–41 ] Combining halogens with CDs and introducing them into the design and construction of 3D TMPs composites is expected to control the morphology and surface defects of the composites and increase the number of active sites.…”

Efficient Catalytic Conversion of Polysulfides by Biomimetic Design of “Branch-Leaf” Electrode for High-Energy Sodium–Sulfur Batteries

“…In Fig. 3 d, the pristine Co 2P XPS spectrum can be deconvoluted into Co 0 (778.88 eV) and Co 2+ (781.60 eV) which could be derived from the surface oxidation of metallic Co [ 36 , 37 ]. The Brunauer–Emmett–Teller (BET) surface area and pore volume of CNF-L@Co are 55.662 m 2 g −1 and 0.089 cm 3 g −1 , respectively, which is beneficial for the maintenance of sulfur.…”