Direct Synthesis of Graphdiyne Nanowalls on Arbitrary Substrates and Its Application for Photoelectrochemical Water Splitting Cell

Abstract

A general and simple route to fabricate graphdiyne nanowalls on arbitrary substrates is developed by using a copper envelope catalysis strategy. The GDY/BiVO system is but one example of combing the unique properites of GDY with those target substrates where GDY improves the photoelectrochemical performance dramatically.

Engineering the Coordination Environment of Single‐Atom Platinum Anchored on Graphdiyne for Optimizing Electrocatalytic Hydrogen Evolution

“…[22a] More recently,z ero valence Ni and Fe single atoms anchored on the pores of GDYf or hydrogen evolution has been reported. [23] Thes p-hybridized alkynyl carbon atoms in the 18 C-hexagonal pores in GDYp rovide ideal anchoring sites for immobilizing the isolated Pt atoms into the GDYframework. Ther esults of atomic resolution high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) images and X-ray absorption fine structure (XAFS) spectra in R space,a sw ell as the first-principles calculations verify that the isolated Pt atoms are anchored on the surface of GDYb yt he coordination interactions of Pt with the alkynyl Catoms in GDY, forming afive-coordinated C 1 -Pt-Cl 4 species and af our-coordinated C 2 -Pt-Cl 2 species in Pt-GDY1 and Pt-GDY2, respectively.Interestingly,Pt-GDY2 shows much higher HER catalytic activity than Pt-GDY1 and commercial Pt/C,with amass activity up to 3.3 times and 26.9 times more active than Pt-GDY1 and Pt/C catalysts,r espectively.T he higher HER catalytic activity of Pt-GDY2 originates from its higher total unoccupied density of states of Pt 5d orbital and close to zero j DG Pt H* j value.…”

“…First, graphdiyne was synthesized and grown on the titanium foils by amodified Hay-Glaser coupling reaction using hexaethynylbenzene as ap recursor. [23] Thes p-hybridized alkynyl carbon atoms in the 18 C-hexagonal pores in GDYp rovide ideal anchoring sites for immobilizing the isolated Pt atoms into the GDYframework. In the wet-chemical approach, K 2 PtCl 4 was used as ap recursor and reacted with GDYa t2 73 Kf or 8hours to generate the Pt-GDY1 sample.T he Pt-GDY2 sample was obtained by annealing Pt-GDY1 at 473 Ku nder Ar atmosphere for 1h.N otably,P t-GDY1 and Pt-GDY2 maintain the morphology of GDYwith no obvious Pt clusters formed, as shown in the SEM and TEM images in the Supporting Information, Figure S1.…”

Rational Design and Construction of Cocatalysts for Semiconductor‐Based Photo‐Electrochemical Oxygen Evolution: A Comprehensive Review

“…Though they may have a lower intrinsic conductivity in comparison with metal or carbon substrates, it can be offset by adding an ultrathin underlayer of SiO x or Nb 2 O 5 . [52] The morphology before and after growing GDY is shown in Figure 5. [48][49][50] For instance, Yang et al demonstrated the growth of ZnO:N nanowires onto ITO substrates successfully.…”

“…[56] Additionally, as for oxygen evolution (Equation (2)), high concentration of H + will restrain the half reaction from proceeding in the positive direction. [52] Copyright 2016, Wiley-VCH. Sci.…”

Semiconducting Conjugated Microporous Polymer: An Electrode Material for Photoelectrochemical Water Splitting and Oxygen Reduction

“…Strong π‐π interactions between graphdiyne and mercaptopyridine surface‐functionalized cadmium selenide quantum dots facilitates hole transportation thus enhancing photocurrents . Graphdiyne nanowalls directly grown on Bismuth vanadate (BiVO 4 ) electrode has enhanced the activity of BiVO 4 towards photoelectrochemical oxygen evolution . Porous structure, in addition to extended π‐conjugation of CMPs, also helps to increase the accessibility of the material surface which is an advantage in applications relating to heterogeneous catalysis and energy storage devices.…”