Visible‐Light‐Driven Photocatalytic H₂O₂ Production on g‐C₃N₄ Loaded with CoP as a Noble Metal Free Cocatalyst

Abstract

A composite catalyst combining CoP with g-C 3 N 4 was explored for the photocatalytic production of H 2 O 2 under visible-light irradiation. The composite catalyst was fabricated by growth of CoP nanoparticles on the surface of g-C 3 N 4 . The CoP nanoparticles were well dispersed on the surface of g-C 3 N 4 and could interact with g-C 3 N 4 to improve charge separation and electron transfer. The composite catalyst showed superior catalytic activity compared with pure CoP or g-C 3 N 4 under visible-light irradiation. The optimal catalyst with 1.76 wt.-% CoP [a] Key

A comparative perspective of electrochemical and photochemical approaches for catalytic H2O2 production

“…144,145 As a noble-metalfree co-catalyst, CoP has also been loaded on the surface of g-C 3 N 4 to improve the photocatalytic H 2 O 2 production efficiency under visible-light illumination by extending the light absorption range and promoting charge separation and electron transfer. 146 Last but not least, a new type of photoelectrochemical (PEC) system without an external bias has also been developed to simultaneously achieve the generation of H 2 O 2 and electricity in recent years. 174,175 Generally, the PEC configuration for H 2 O 2 production can be divided into three categories based on where H 2 O 2 was produced, at the cathode, anode, or both.…”

Overall water splitting and hydrogen peroxide synthesis by gold nanoparticle-based plasmonic photocatalysts

“…So far, many semiconductor photocatalysts for water splitting have been intensively studied; however, a band gap larger than $2.5 eV is usually necessary 8 because of the large overpotentials for water splitting, particularly the water oxidation reaction (WOR). 9 The same is true for the synthesis of H 2 O 2 from water and O 2 by semiconductor photocatalysts including graphitic carbon nitride (g-C 3 N 4 ) [10][11][12][13] and bismuth vanadate. 14 On the other hand, the research on Au NP-based plasmonic photocatalysts with strong and broad absorption in the visible-to-near infrared region due to the localized surface plasmon resonance (LSPR) is rapidly progressing.…”

“…49 The photocatalytic activity of metal NP-loaded TiO 2 (M/TiO 2 , M ¼ Au and Pt) for the ORR was carried out in aerated ethanol aqueous solution under UV-light irradiation (M/TiO 2 , M ¼ Au and Pt). 50 In this case, the electrons in metal NPs can be used for the twoelectron and/or four-electron ORR (reactions (12) and (13)), and the photocatalytic activity can be a good indicator of the electrocatalytic activity of metal NPs for the ORR. Fig.…”

Unveiling real active site for photocatalytic H2O2 evolution: A combined experimental and DFT-TDDFT study

“…Photocatalytic H 2 O 2 production through the O 2 two-electron reduction process (O 2 + 2H + + 2e − → H 2 O 2 ) has attracted wide attention 4,5 . With the continuous efforts of researchers, a large number of photocatalysts for H 2 O 2 evolution have been developed [6][7][8][9][10][11][12][13][14][15][16][17][18] . Among them, photocatalysts with multiple modi cation sites (MSs) exhibited more superior performance as compared to their catalytically inaccessible counterparts of single sites materials [14][15][16][17] .…”