Photocatalytic H₂ Evolution Coupled with Furfuralcohol Oxidation over Pt‐Modified ZnCdS Solid Solution

Abstract

Coupling photocatalytic H2 production with organic synthesis attracts immense interest in the energy and chemical engineering field for the low‐cost, clean, and sustainable generation of green energy and value‐added products. Nevertheless, the performance of current photocatalysts is greatly limited by grievous charge recombination and tardy H2 evolution. To tackle these issues, a Pt nanocluster‐modified ZnCdS solid solution is fabricated for photocatalytic H2 production and selective furfuralcohol oxidation. The internal electric field inside the ZnCdS and Schottky junction between ZnCdS and Pt nanoclusters drastically ameliorate charge separation. Meanwhile, the Pt nanoclusters remarkably expedite the H2 evolution kinetics on ZnCdS. As a result, the H2 production rate over Pt‐loaded ZnCdS reaches 1045 µmol g−1 h−1, which is about 26‐ and 70‐fold that of CdS and ZnS, respectively. Under light irradiation for 3 h, the conversion of furfuralcohol to furfural reaches 71% with 89% furfural selectivity. The photocatalytic mechanism is investigated by in situ characterizations and theoretical calculations.

Ni2P NPs loaded on methylthio-functionalized UiO-66 for boosting visible-light-driven photocatalytic H2production

“…The band gap energy ( E g ) of these samples was calculated as follows: ( αhν ) 2 = A ( hν − E g )where h is the Planck's constant, ν denotes light frequency, α means absorption coefficient, A refers to the constant, and E g represents the band gap energy. 35 According to this equation, the E g value of UiO-66 and UIOS was calculated to be 4.01, 2.74 eV, respectively, which is commensurate with related literature reports and the E g value of 5 wt% Ni 2 P/UIOS was 2.65 eV (Fig. 5b and Fig.…”

“…Current research primarily uses precious metals such as Pt cocatalysts 33,34 to improve the photocatalytic hydrogen production efficiency of MOFs. 35,36 Xiao et al introduced Pt nanoparticles incorporated inside or supported on UiO-66-NH 2 for photocatalytic hydrogen production via water splitting. Pt decorated MOF nanocomposites exhibit significantly improved hydrogen production activities.…”

Cooperative Coupling of H2O2 Production and Organic Synthesis over a Floatable Polystyrene‐Sphere‐Supported TiO2/Bi2O3 S‐Scheme Photocatalyst

“…This result verifies the rapid charge transfer and facilitated electron–hole separation in the composite. [ 36 ] As observed in TiO 2 ‐based samples, the current decreases immediately after the light switches off and then declines gradually. This is caused by the release of charge carriers from deep traps.…”

Fast charge transfer kinetics in an inorganic–organic S-scheme heterojunction photocatalyst for cooperative hydrogen evolution and furfuryl alcohol upgrading

“…[6][7][8] Therefore, an overall reaction integrating H 2 evolution with oxidative organic synthesis in a single photocatalytic redox system is highly desirable and still challenging. 9 To date, among the various organic conversion reactions, selective oxidation of biomass-derived furfuryl alcohol to valueadded products has demonstrated high application value in industry. [10][11][12][13] In 2018, Ye et al reported remarkable photocatalytic H 2 production from pure water without electron sacricial agents achieved by P-doped Zn x Cd 1−x S. When the biomass-derived compound 5-hydroxymethylfurfural (HMF) was added into this system, the photocatalytic H 2 production performance could be further promoted, simultaneously obtaining value-added HMF oxidation products.…”

“…6–8 Therefore, an overall reaction integrating H 2 evolution with oxidative organic synthesis in a single photocatalytic redox system is highly desirable and still challenging. 9…”