Isotype heterojunction: tuning the heptazine/triazine phase of crystalline nitrogen-rich C₃N₅ towards multifunctional photocatalytic applications

Abstract

Photocatalytic technology has been well-studied as a means to achieve sustainable energy generation through water splitting or chemical synthesis. Recently, low C/N atomic ratio carbon nitride allotrope, C3N5, is highly...

Crystalline oxygen-bridged carbon nitride from self-assembled supramolecular intermediate for efficient photocatalytic H2 evolution

“…Overall, the C/N ratio within CMe 32 -CN exceeded that of g-C 3 N 4 , further validating the conguration of oxygen-bridged heptazine units. The solid-state 13 C NMR spectrum was employed further to verify the inuence of the oxygen-bridging structure, as illustrated in Fig. S9.…”

“…2,3 Nevertheless, the intrinsic defects of unaltered carbon nitride, which encompass limited mobility and suboptimal separation rates of photoinduced electron-hole pairs, signicantly curtail its efficacy in photocatalytic water splitting. 4 To surmount this challenge, an array of material modication approaches have gained prominence, encompassing techniques such as doping, 5,6 nanostructure engineering, [7][8][9] interfacial architecture, 10,11 and modulation of crystallinity, 12,13 all of which have demonstrated efficacy in ameliorating the chemical and physical properties of carbon nitride and enhancing photocatalytic performance. 14 Elevated in-plane structural order and minimal defects within carbon nitride have emerged as pivotal determinants in elevating photocatalytic efficiency, attributable to their facilitation of efficient charge carrier separation.…”

Leveraging Dual‐Atom Catalysts for Electrocatalysis Revitalization: Exploring the Structure‐Performance Correlation

“…Inspired by the 2D carbon‐based materials above, graphitic carbon nitride (g‐C 3 N 4 ) has also attracted an ever‐increasing interest to steadily host the dual atom pairs within its structure. [ 44 ] This ultrathin monolayer material offers several remarkable inherent properties, such as allowing effective surface polarization charges accumulation on the metal atoms, maintaining the neutral states of the metal atoms, as well as disclosing useful and reliable information for the catalytic active sites’ identification. [ 34a ] More importantly, the existence of abundant and uniform unsaturated N coordination sites (Pyridinic‐N) could provide a stable coordination site and rich nitrogen lone‐pair electrons for the capturing of metal atoms.…”

Self‐Supported Earth‐Abundant Carbon‐Based Substrates in Electrocatalysis Landscape: Unleashing the Potentials Toward Paving the Way for Water Splitting and Alcohol Oxidation

“…[ 13 ] From this perspective, an emerging alternative approach involves splitting water to generate clean energy in the form of H 2 and oxygen (O 2 ) gas, achieved through photocatalytic, electrocatalytic, or thermocatalytic techniques. [ 12,14–17 ] These methods have significantly mitigated pollution and achieved zero carbon emissions. Among them, electrocatalytic overall water splitting (OWS) has garnered worldwide interest, as this technology successfully produces high‐purity H 2 energy from electricity in an environmentally benign manner.…”