2026-04-17T13:51:06Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/2228832025-12-04T21:32:28Zcom_2072_1057col_2072_478812col_2072_478917

00925njm 22002777a 4500 dc Wang, Yan author Pajares, Arturo author Serafin, Jarosław author Alcobé i Ollé, Xavier author Güell Vilà, Frank author Homs Martí, Narcís author Ramírez de la Piscina, Pilar author 2025-09-01T16:31:39Z 2025-09-01T16:31:39Z 2024-02-16 2025-09-01T16:31:39Z In this work, we studied new materials free of noble metals that are active in photocatalytic H2 generation from ethanol aqueous solutions (EtOHaq), which can be obtained from biomass. MoxC/g-C3N4 photocatalysts containing hexagonal (hcp) Mo2C and/or cubic (fcc) MoC nanoparticles on g-C3N4 nanosheets were prepared, characterized, and evaluated for photocatalytic hydrogen production from EtOHaq (25% v/v). Tailored MoxC/g-C3N4 nanocomposites with MoxC crystallite sizes in the 4–37 nm range were prepared by treatment with ultrasound of dispersions containing MoxC and g-C3N4 nanosheets, formerly synthesized. The characterization of the resulting nanocomposites, MoxC/g-C3N4, by different techniques, including photoelectrochemical measurements, allowed us to relate the photocatalytic performance of materials with the characteristics of the MoxC phase integrated onto g-C3N4. The samples containing smaller hcp Mo2C crystallites showed better photocatalytic performance. The most performant nanocomposite contained nanoparticles of both hcp Mo2C and fcc MoC and produced 27.9 mmol H2 g–1 Mo; this sample showed the lowest recombination of photogenerated charges, the highest photocurrent response, and the lowest electron transfer resistance, which can be related to the presence of MoC-Mo2C heterojunctions. Moreover, this material allows for easy reusability. This work provides new insights for future research on noble-metal-free g-C3N4-based photocatalysts. Difracció Alcohol Fotocatàlisi Diffraction Alcohol Photocatalysis MoxC heterostructures as efficient co-catalysts in robust MoxC/g-C3N4 nanocomposites for photocatalytic H2 production from ethanol