Cuprous Oxide (Cu2 O) is a photocatalyst with severe photocorrosion issues. Theoretically, it can undergo both self-oxidation (to form copper oxide (CuO)) and self-reduction metallic (Cu)) upon illumination the aid of photoexcited charges. There is, however, limited experimental understanding "dominant" pathway. Both modes be regulated by tailoring conditions photocatalytic reactions. Photooxidation Cu2 O (in suspension system), accompanied corroded morphology, kinetically favourable...

Rational design and development of new-generation photocatalysts with high hydrogen evolution activity is recognized as an effective strategy to settle energy crisis. To this regard, hybrid Au quantum dots embedded in rimous cadmium sulfide nanospheres are synthesized by using a simple hydrothermal process followed photoreduction. The rough surface irregular fissures greatly strengthen their adhesion interaction dots, which effectively facilitates the separation, restrains recombination,...

Abstract Improving the stability of cuprous oxide (Cu 2 O) is imperative to its practical applications in artificial photosynthesis. In this work, Cu O nanowires are encapsulated by metal–organic frameworks (MOFs) 3 (BTC) (BTC=1,3,5‐benzene tricarboxylate) using a surfactant‐free method. Such MOFs not only suppress water vapor‐induced corrosion but also facilitate charge separation and CO uptake, thus resulting nanocomposite representing 1.9 times improved activity for selective...

The isocyanate groups (–NCO) derived from –NC– bonds in the organic ligands enables thermally treated ZIF-8 to act as wide-spectrum photocatalyst.

Improved photocatalytic activities in highly ordered porous photocatalysts are often attributed to the larger surface area, higher light absorption, and suppressed charge recombination. Other underlying reasons for improved transport, however, remain elusive at this stage. Herein, 3DOM BiVO4 examined understand carrier dynamics their effects water splitting. Quantum confinement arising from ultrathin crystalline wall upshifted its conduction band, enabling proton reduction hydrogen gas under...

Abstract Metal oxides are promising for photoelectrochemical (PEC) water splitting due to their robustness and low cost. However, poor charge carrier transport impedes activity, particularly at low-bias voltage. Here we demonstrate the unusual effectiveness of phosphorus doping into bismuth vanadate (BiVO 4 ) photoanode efficient PEC splitting. The resulting BiVO shows a separation efficiency 80% 99% potentials as 0.6 1.0 V RHE , respectively. Theoretical simulation experimental analysis...

Abstract Hydrogen peroxide is an essential chemical that attracting strong attention for energy and environmental applications. However, the struggle between growing market demand unsustainability of conventional anthraquinone method motivates exploration alternative H 2 O production processes. Although several new processes have been proposed, environmental‐friendly solar‐driven attracts most because only inputs water, oxygen, light energy. The rational design functional photo‐responsive...

Photoelectrochemical (PEC) water oxidation to hydrogen peroxide (H2O2) is an alternative route the conventional anthraquinone process, but it still restricted by prevailing competitive oxygen evolution reaction (OER). Here, we reveal that intrinsic vacancies (OVs) of BiVO4 photoanodes are detrimental PEC H2O2. The superabundant OVs photoanode passivated a thermal treatment in pressurized O2 atmosphere Parr reactor. with least OV concentration achieves ca. two times H2O2 selectivity...

Electrodeposition of copper acetate under mild acidic conditions followed by a controlled annealing process allowed the manipulation oxygen vacancies in resultant Cu2O-based electrodes. The conduction type semiconductor was, therefore, tunable, allowing fabrication n-type, p-type, and p–n junction photoelectrodes. A transformation original n-type to subsequent p-type nature was observed through variation temperature duration. observation anodic cathodic photocurrents for thin films confirmed...

An ultrathin amorphous ZnO layer is introduced on Cu₂O by pulsed electrodeposition, which helps stabilise the photocathode for water splitting.

Abstract Ammonia (NH 3 ) plays a vital role in the fertilizer industry, nitrogen‐containing chemical production, and hydrogen storage. The development of electrocatalytic photo(electro)catalytic nitrogen reduction reaction (NRR) to synthesize NH are desirable, which more environmentally friendly than conventional Haber–Bosch process. Due strong nonpolar bonding NN bond, discovery efficient catalysts is essential overcome high kinetic barrier. Here, bismuth‐based materials that show proven...

The electrocatalytic nitrogen reduction reaction (NRR) provides a sustainable route for NH3 synthesis. However, the process is plagued by strong NN triple bond and high barrier. Modification of catalyst surface to increase N2 adsorption activation crucial. Herein, copper nanoparticles are loaded on oxygen-deficient TiO2 , which exhibits an enhanced NRR performance with yield 13.6 µg mgcat-1 h-1 at -0.5 V versus reversible hydrogen electrode (RHE) Faradaic efficiency 17.9% -0.4 RHE compared...

Hydrogen dopants and oxygen vacancies (OVs) play crucial roles in BiVO4 photoanodes. However, the decisive factor determining charge transport of hydrogenated BiVO4, particularly with electron small polaron formation, remains elusive. Here we show a decreased barrier upon mildly hydrogenating nanoporous photoanode, as evidenced by thermally activating photocurrent responses. Monochromatic light photoelectrochemical performance, temperature-dependent conductivity, proton nuclear magnetic...

Selective photoelectrochemical (PEC) water oxidation to hydrogen peroxide is an underexplored option as opposed the mainstream oxygen reduction reaction. Albeit interesting, selective H2 O2 production via oxidative pathway plagued by noncontrollable two-electron transfer reaction and overoxidation of thus-formed . Here, ZnO passivator-coated BiVO4 photoanode reported for PEC production. Both selectivity rate increase in range 1.0-2.0 V versus RHE under simulated sunlight irradiation. The...

C₃N₄ nanosheets/TiO₂ nano-heterostructures have been synthesized <italic>via</italic> a novel method, exhibiting excellent photocatalytic hydrogen generation under visible light irradiation.

Abstract Cuprous Oxide (Cu 2 O) is a photocatalyst with severe photocorrosion issues. Theoretically, it can undergo both self‐oxidation (to form copper oxide (CuO)) and self‐reduction metallic (Cu)) upon illumination the aid of photoexcited charges. There is, however, limited experimental understanding “dominant” pathway. Both modes be regulated by tailoring conditions photocatalytic reactions. Photooxidation Cu O (in suspension system), accompanied corroded morphology, kinetically...

Rationally designing photocatalysts is crucial for the solar-driven nitrogen reduction reaction (NRR) due to stable N≡N triple bond. Metal-organic frameworks (MOFs) are considered promising candidates but suffer from insufficient active sites and inferior charge transport. Herein, it demonstrated that incorporating 3d metal ions, such as zinc (Zn) or iron (Fe) into Al-coordinated porphyrin MOFs (Al-PMOFs) enables enhanced ammonia yield of 88.7 65.0 µg g

Copper sulfide (CuxS) with a hollow structure derived from the controlled transformation of cuprous oxide (Cu2O) demonstrated high activity for photocatalytic hydrogen generation good reproducibility. While was facilitated by better crystallinity and lower copper defect density (thus suppressed charge recombination) yielded through equilibrated reaction, stability CuxS photocatalyst attributed to its resistance sintering induced chemical dissolution-redeposition (physicochemical stability)....