Unveiling the plasmonic electron origin: dual vacancies synergy in an S-scheme Cu7S4@ZnIn2S4 heterojunction boosting hot electron flow for photothermal H2 evolution.

Engineering of multiscale periodic macroporous NaTaO3: Decoupling mass transport and charge dynamics for enhanced hydrogen evolution.

Optimizing bulk high-entropy alloys: In-situ carbide microdomains empower efficient electrocatalysis for overall water splitting.

Here, for the first time, a study of composite graphitic carbon nitride photocatalysts based on laboratory synthesized TiO2 (g-C3N4/TiO2) for the hydrogen evolution reaction (HER) from aqueous solutions of organic substrates under visible light irradiation is presented. The methods to synthesize TiO2 and g-C3N4/TiO2 include precipitation and hydrothermal routes, followed by calcination. A comparison of the synthetic approaches was carried out using a variety of electron donor systems (glucose, ethanol and triethanolamine). The highest HER activity is achieved with a photocatalyst containing 10 wt% g-C3N4 on TiO2, obtained by precipitation. Pt- and Cu-modified photocatalysts exhibit hydrogen evolution rates of 161 and 34 µmol h-1 g-1, respectively, in aqueous glucose solution. This enhanced performance originates from the successful formation of effective heterojunctions between g-C3N4 and the different phases of TiO2, as well as the material sensitivity to both visible and UV light.

Oxygen-vacancy-engineered MoO2-Ni3S2@Ni foam heterostructure for enhanced sulfur oxidation and hydrogen evolution

Synergistic activation of bimetallic sulfides via hierarchical architecture: a superior bifunctional electrocatalyst for efficient hydrogen evolution and iodine reduction.

Constructive interfacial charge-carrier separation in Z-scheme Ba3V2O8/ZnFe2O4 heterojunction for photocatalytic degradation of tetracycline hydrochloride and hydrogen evolution

The increasing demand for hydrogen (H 2 ) as an energy vector has driven the search for novel resources to ensure its supply. This study investigates the valorization of actual urban wastewater (WW) for continuous H 2 generation via photocatalysis using g-C 3 N 4 -based materials under visible light. Untreated WW revealed lower H 2 production than deionized water ( e.g. , around 150 and 240 μmol·g cat −1 ·h −1 , respectively) due to inhibitory effects of turbidity and organic load. Adjusting the WW pH to ~3 significantly enhanced H 2 production up to around 260 μmol·g cat −1 ·h −1 (~80 μmol·g cat −1 ·h −1 when using deionized water), suggesting increased proton availability, improved pollutant adsorption on the photocatalyst surface, and enhanced electron transfer under acidic conditions. Process efficiency was influenced by operational parameters, with optimal performance at 25 °C and 0.25 g·L −1 of photocatalyst. Organic compounds in WW played a crucial role, as H 2 yield declined markedly after their removal, confirming they act as electron donors. The addition of synthetic sacrificial agents, such as triethanolamine (TEOA, 0.05 M), further increased H 2 yields up to ~5900 μmol·g cat −1 ·h −1 , highlighting their strategic role in boosting production. The g-C 3 N 4 -based photocatalyst retained activity after reuse and when immobilized on a polymeric film, allowing easy recovery without loss of performance. These findings demonstrate the potential of immobilized photocatalysts for efficient H 2 production from urban wastewater. • Visible-light-driven H 2 generation achieved using carbon nitride-based materials. • Acidic pH adjustment (pH ~3) significantly boosts H 2 yield via organic compounds photoreforming. • Photocatalyst exhibits excellent stability both as powder and immobilized on polymeric support. • Oxidative pretreatment confirms the key role of organic compounds in driving H 2 evolution.

A unique scandium oxide-doped cobalt oxide nanosheet array for coupling hydrogen evolution with catalytic conversion of polyethylene terephthalate into formate.

Optimized adsorption energy of intermediates on bimetallic NiCoSe nanoflowers for synergistic urea electrooxidation and hydrogen evolution.

Boosting the photocatalytic hydrogen evolution of snowflake Cu2S/ZnWO4 through morphology control and construction of p-n heterojunction.

Carbon-supported bimetallic RuCu catalyst for efficient hydrogen evolution from ammonia borane hydrolysis.

Enhanced electrochemical water splitting for hydrogen and oxygen evolution reaction using ZnTiO3 perovskite deposited Fe screw pitch electrode

Hydrangea-like high-entropy material (FeNiCoMnMo)S2 as highly efficient bifunctional electrocatalyst for overall water splitting.

Optimizing Ni/Co ratios in NiCo-LDH for enhanced hydrogen and oxygen evolution reactions in overall water splitting

Self-reduced CuₓO multichannels at TiO2/porphyrin metal-organic frameworks interface for enhanced photocatalytic hydrogen evolution.

Investigating the charge transfer mechanism of 1D/2D ZnO/SnIn4S8 S-scheme heterojunction for efficient photocatalytic hydrogen evolution

Synergistic interaction of ternary Pd−Cu−Ni confined in nanoparticles as pH-universal catalysts for enhanced hydrogen evolution reaction

Biohydrogen evolution via ferric oxide-intercalated graphene oxide modified nickel foam biocathode in single-chamber microbial electrolysis cell.

Heteroatom substitution boosts Electrocatalytic Ammonia synthesis in porous coordination network.