Activating Pd Nanoparticles on Oxygen-Doped g-C₃N₄ for Visible Light-Driven Thermocatalytic Oxidation of Benzyl Alcohol

Abstract

Direct oxidation of benzyl alcohol (BzOH) to benzaldehyde (BzH) using O 2 as the oxidant has crucial significance under mild conditions in industrial manufacturing. Herein, an efficient and ecofriendly Pd/O-g-C 3 N 4 heterojunction catalyst using oxygen-doped g-C 3 N 4 (O-g-C 3 N 4 ) with a porous surface as the support is developed for visible light-driven thermocatalytic oxidation of BzOH to BzH by using O 2 as the sole oxidant. The obtained Pd/O-g-C 3 N 4 exhibits visible light-enhanced catalytic performance under visible light irradiation with BzOH conversion and BzH yield of 89.4 and 76.6%, respectively, which are 1.96 and 1.83 times higher than those for the catalyst in the dark. Oxygen doping, as well as Pd deposition, can significantly narrow the band gap of g-C 3 N 4 , thereby enhancing its visible light harvesting ability. The resulting heterojunction interface between Pd nanoparticles and O-g-C 3 N 4 might promote separation of the photogenerated e − −h + pairs. In addition to achieving considerable BzOH conversion and BzH yield, Pd/O-g-C 3 N 4 also exhibits impressive stability. The current study provides potential applications for the green and efficient catalytic oxidation of other alcohols to corresponding aldehydes using O 2 as the oxidant.

Boosting Li–O2 Battery Performance via Coupling of P–N Site‐Rich N, P Co‐Doped Graphene‐Like Carbon Nanosheets with Nano‐CePO4

“…Due to the high cost and rareness of noble metals and the low electrical conductivity of most transition metal oxides, carbon materials are considered as one of the most attractive candidates for LOB cathode catalysts as they have the advantages of low-cost, excellent conductivity, and thermal conductivity, large specific surface area, especially the adjustable microstructures and surface-active centers. [11][12][13][14][15][16] However, pure carbon materials as cathode catalysts for LOBs often suffer from poor rate capability and cycling stability, as well as the formation of Li 2 CO 3 impurities. [17,18] In search of more robust and practical carbonbased cathode catalysts, doping carbon materials with heteroatoms has been demonstrated as a successful approach toward enhanced carbon-based cathode catalysts.…”

Ultrathin corrugated nanowire TiO2 as a versatile photoanode platform for boosting photoelectrochemical alcohol and water oxidation

“…The weak oxidant, O 2 ˙ − , cleaved the O–H bond in the C 6 H 5 -CHOH˙* that was further converted to BAD as the sole oxidized product, resulting in highly selective oxidation of BA to BAD. 35–41…”

“…The weak oxidant, O 2 c − , cleaved the O-H bond in the C 6 H 5 -CHOHc* that was further converted to BAD as the sole oxidized product, resulting in highly selective oxidation of BA to BAD. [35][36][37][38][39][40][41] Fig. 4C and D show the reason why the performance of UCW-TiO 2 PEC BA oxidation is better than that of NPTiO 2 .…”

Progress of charge carrier dynamics and regulation strategies in 2D CxNy-based heterojunctions

“…Apart from the commonly studied metal oxides, transition metal sulfides/selenides, and carbon materials, C x N y also forms heterojunctions with various other materials (Fig. 12), such as bismuth oxyhalides, [162][163][164][165] elementary substances, [166][167][168] perovskites, [169][170][171][172] LDHs, [173][174][175] transition metal carbides (MXenes), [176][177][178] silver halides, [179][180][181] and many others. These heterojunctions have found their way into numerous aspects of daily life and have become indispensable emerging materials (Fig.…”