Stabilization of cobalt clusters with graphdiyne enabling efficient overall water splitting

Graphdiyne‐Stabilized Silver Nanoparticles as an Efficient Electrocatalyst for CO2 Reduction

“…By the direction and restriction of the GDY template, the effective in situ loading of the ordered AgNPs on it can not only prevent the aggregation of AgNPs, but also highly stabilize the AgNPs, which leads to the superior stability of the Ag/GDY/CC composite. [ 40 ] All these results also confirm that with the stabilization of GDY, the oxidation state of Ag cannot increase. In contrast, the transformation of electrons between the phase interface of GDY and AgNPs should be through the strong coupling between the π / π * orbitals of GDY and the d orbital in Ag; meanwhile, the charge occupation can be mutually compensated via the band overlapping between C‐(2 s 2 p ) orbital of GDY and d orbital of Ag atom; thus, the oxidation state of Ag should be stable.…”

“…Meanwhile, the two peaks at 1927 and 2178 cm −1 are in good agreement with the vibration of diacetylene chain in GDY of Ag/GDY/CC composites. [ 37,38,40,41 ] In addition, the intensities of the characteristic peaks for Ag/GDY/CC in Figure 2b are much higher than those for pure GDY in Figure 2c, which confirms that the anchoring of silver nanoparticles onto GDY has a surface‐enhanced Raman scattering (SERS) effect on GDY. [ 17 ] Therefore, the analysis of Raman spectroscopy moreover proves the successful deposition of silver nanoparticles onto the GDY support and the intimate contact between silver nanoparticles and GDY.…”

“…As a new type of functional carbon material, since it was first synthesized by Li et al, [ 36–39 ] Graphdiyne (GDY) has been successfully applied in numerous research areas, such as HER, [ 40–42 ] oxygen evolution reaction (OER), [ 43–45 ] nitrogen reduction, [ 46 ] supercapacitors, [ 47 ] lithium‐ and sodium‐ion batteries, [ 48–51 ] CO 2 reduction, [ 52–54 ] and so on. [ 55 ] With the unique high π ‐conjugated construction, GDY possesses very high electronic conductivity (2.56 × 10 −1 S m −1 ), excellent charge carrier mobility (2 × 10 5 cm 2 V −1 s −1 ), and furthermore, superior stability under acid or alkali conditions at up to 150 °C.…”

Atomic-Level Functionalized Graphdiyne for Electrocatalysis Applications

“…The electrode only needs 1.81 V of the cell voltage to deliver 10 mA cm −2 , which confirms its excellent electrocatalytic activity. In another recent study, Shi et al described a new strategy that utilizes strong electronic perturbation effect to stabilize ultrasmall Co clusters, which adopt GDY nanoarray as support material (Cu@GDY-Co) [139]. As a self-standing bifunctional electrocatalysts for overall water splitting, the Cu@GDY-Co electrocatalyst displays superior activities for both OER (with the overpotential of 234 mV at 10 mA cm −2 and the Tafel slope value of 51.7 mV dec −1 ) and HER (with the overpotential of 63 mV at 10 mA cm −2 and the Tafel slope value of 41.7 mV dec −1 ).…”

“…Overall water splitting schematic illustration and electrochemical characterizations of Cu@GDY-Co. (a) Schematic illustration of the electrolyzer using Cu@GDY-Co as both cathode and anode; (b) polarization curves for overall water splitting; (c) chronopotentiometric curve of water electrolysis recorded at the current density of 10, 40 and 100 mA cm −2 (reproduced with permission from[139]. Copyright Elsevier, 2020).…”