In-situ carbon-coated TiO2 boosting the visible-light photocatalytic hydrogen evolution

Yuan

et al. 2023

Catal. Sci. Technol.

Self Cite

Section: Resultsmentioning

confidence: 96%

Chitosan-derived carbon supported CoO combined with CdS facilitates visible light catalytic hydrogen evolution

Yuan

et al. 2023

Catal. Sci. Technol.

Self Cite

“…Cel-600-1Pd has the largest BET surface area (436.8 m 2 /g) compared to those of Cel-1Pd (11.6 m 2 /g) and Cel-400-1Pd (168.2 m 2 / g). For sample Cel-1Pd, the adsorption−desorption isotherms are just coincident slants, suggesting the absence of porous structures 33 (Figure 2a). The pore size distribution of 3.…”

Section: ■ Results and Discussionmentioning

confidence: 98%

Light-Irradiated Thermal Energy-Promoted Selective Phenol Hydrogenation on Cellulose-Supported Palladium Catalyst with Green Hydrogen

ACS Sustainable Chem. Eng.

Yuan

et al. 2022

Self Cite

The energy and environmental crises urge us to develop a green and sustainable catalytic strategy to achieve chemical transformation. Thus, light-irradiated thermal energy, green hydrogen generated from water electrolysis, and natural cellulose were combined into a catalytic system for phenol hydrogenation to cyclohexanone in this article. The cellulose containing abundant hydroxyl groups improves the catalytic activity of palladium nanoclusters supported on it and hinder the overhydrogenation of cyclohexanone to cyclohexanol. DFT calculations and control experiments demonstrate that the existence of glucose (the monomer of cellulose) on a Pd surface facilitates the dissociative adsorption of phenol on a catalyst and deactivates the hydrogenation of cyclohexanone to cyclohexanol, which further clarifies the higher catalytic activity and better selectivity of Cel-1Pd. More importantly, the selective hydrogenation of phenol to cyclohexanone can be conducted smoothly in a photothermal reactor under irradiation of a xenon lamp, effectively facilitating the benign conversion between light, thermal, and chemical energies.

“…4,5 Since Fujishima and Honda developed photocatalytic water splitting using TiO 2 as a photocatalyst in 1972, photocatalytic H 2 evolution has become one of the most attractive methods in the field of green energy research. 6,7 Using semiconductors as photocatalysts is an effective way for photocatalytic H 2 evolution. 8,9 Many researchers have developed excellent photocatalysts to efficiently convert sunlight into H 2 energy.…”

Section: Introductionmentioning

confidence: 99%

“…The consumption of energy increases gradually with the development of technology. , It is necessary to find a green and renewable energy to relieve the growing demand of the nearly exhausted fossil energy . H 2 has a very extensive development potential in the new energy resource field for its environmental friendliness, wide resources, good thermal conductivity, high calorific value, light weight, convenience for transport, etc. , Since Fujishima and Honda developed photocatalytic water splitting using TiO 2 as a photocatalyst in 1972, photocatalytic H 2 evolution has become one of the most attractive methods in the field of green energy research. , …”

Section: Introductionmentioning

confidence: 99%

Co₃O₄ Nanosheet/g-C₃N₄ Hybrid Photocatalysts for Promoted H₂ Evolution

Chen

Wang

Hou

et al. 2023

ACS Appl. Nano Mater.

Co3O4 is an attractive semiconductor in the photocatalytic field due to its proper band gap; however, its energy level structure is mismatched for H2 evolution. Herein, the Co3O4-based photocatalysts, Co3O4 nanosheet/g-C3N4 hybrids, were successfully prepared by an ultrasonic self-assembly method for enhanced photocatalytic H2 evolution. The optimized hybrid with 20 wt % g-C3N4, 20-CNCo, displayed the best photocatalytic performances, and the average H2 evolution rate was 134.6 μmol·g–1·h–1. The enhanced photocatalytic H2 evolution activities of 20-CNCo were due to the formation of heterojunctions between Co3O4 nanosheets and g-C3N4, which can increase the optical absorption ability, promote the separation of photogenerated charges, accelerate the electron transfer, and prolong the lifetime of the excited electrons. Moreover, following the unique step-scheme (S-scheme) charge transfer mechanism, the strong redox ability of the Co3O4 nanosheet/ g-C3N4 hybrid was retained, which was beneficial to the H2 evolution. This work provides strategies for designing active catalysts for photocatalytic reactions.