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Electrochemical synthesis of hydrogen peroxide (H2O2) through the selective oxygen reduction reaction (ORR) offers a promising alternative to the energy‐intensive anthraquinone method, while its success relies largely on the development of efficient electrocatalyst. Currently, carbon‐based materials (CMs) are the most widely studied electrocatalysts for electrosynthesis of H2O2 via ORR due to their...
Unlocking the potential of the hydrogen economy is dependent on achieving green hydrogen (H2) production at competitive costs. Engineering highly active and durable catalysts for both oxygen and hydrogen evolution reactions (OER and HER) from earth‐abundant elements is key to decreasing costs of electrolysis, a carbon‐free route for H2 production. Here, a scalable strategy to prepare doped cobalt...
Nanoparticle drug delivery is largely restricted by the low drug loading capacity of nanoparticle carriers. To address this critical challenge and maximize the potential of nanoparticle drug delivery, a 2D ultra‐thin layered double hydroxide (LDH) nanosheet with exceptionally high drug loading, excellent colloidal stability, and prolonged blood circulation for cancer treatment is constructed. The...
Herein, it is shown that by engineering defects on CexSi1−xO2−δ nanocomposites synthesized via flame spray pyrolysis, oxygen vacancies can be created with an increased density of trapped electrons, enhancing the formation of reactive oxygen species (ROSs) and hydroxyl radicals in an ozone‐filled environment. Spectroscopic analysis and density functional theory calculations indicate that two‐electron...
Electrochemical generation of hydrogen peroxide (H2O2) is an attractive alternative to the energy‐intensive anthraquinone oxidation process. Metal‐free carbon‐based materials such as graphene show great promise as efficient electrocatalysts in alkaline media. In particular, the graphene edges possess superior electrochemical properties than the basal plane. However, identification and enhancement...
Photoelectrocatalysis
The cover image, highlighting the work by Fatwa Firdaus Abdi, Yun Hau Ng, and co‐workers in article number 2102023, shows the photoelectrochemical water oxidation on an illuminated plate‐like bismuth tungstate photoanode thin film. The tungsten concentration is modulated to tune the photoexcited charge transportation of the thin film. This “self‐doped” of tungsten leads to the...
Bismuth tungstate (Bi2WO6) thin film photoanode has exhibited an excellent photoelectrochemical (PEC) performance when the tungsten (W) concentration is increased during the fabrication. Plate‐like Bi2WO6 thin film with distinct particle sizes and surface area of different exposed facets are successfully prepared via hydrothermal reaction. The smaller particle size in conjunction with higher exposure...
Copper‐based chalcogenides have been considered as potential photocathode materials for photoelectrochemical (PEC) CO2 reduction due to their excellent photovoltaic performance and favorable conduction band alignment with the CO2 reduction potential. However, they suffer from low PEC efficiency due to the sluggish charge transfer kinetics and poor selectivity, resulting from random CO2 reduction reaction...
The increasing interest in fuel cell technology encourages the development of efficient and low‐cost electrocatalysts to replace the Pt based materials for catalyzing the cathodic oxygen reduction reaction (ORR). In the present work, a nitrogen and phosphorus co‐coordinated manganese atom embedded mesoporous carbon composite (MnNPC‐900) is successfully prepared via a polymerization of o‐phenylenediamine...
Excellent photoelectrochemical performance of bismuth vanadate in water splitting is achieved by coupling with graphene sheets. On page 5295, R. Amal, S. C. Smith, Y. H. Ng, and co‐workers, demonstrate the ability to achieve efficient interfacial charge transfer between bismuth vanadate and graphene sheets by modulating the exposure extent of {010}/{110} facets of bismuth vanadate. The overall photoactivity...
Efficient interfacial charge transfer is essential in graphene‐based semiconductors to realize their superior photoactivity. However, little is known about the factors (for example, semiconductor morphology) governing the charge interaction. Here, it is demonstrated that the electron transfer efficacy in reduced graphene oxide‐bismuth oxide (RGO/BiVO4) composite is improved as the relative exposure...
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