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Indium nitride (InN) is a promising photoelectrode material for photoelectrochemical (PEC) water splitting due to its strong light absorption capability, excellent electron mobility and direct band gap. However, the severe re-joining of the carrier in bulk or surface hinders the application of InN nanomaterials. Therefore, an InN nanorod/Ni(OH)2 heterojunction for PEC water splitting with enhanced interfacial charge transfer under a biased voltage was constructed first. In this case, the Ni(OH)2 catalyst not only has excellent electrocatalytic properties, but also can eliminate the surface state of the InN nanorods within a certain range. The improved InN/Ni(OH)2 photoelectrodes show that the photocurrent density of 4.43 mA cm−2, was 16 times higher than that of the pure InN nanorods (0.27 mA cm−2) at the same potential. Its applied bias photon-to-current efficiency (ABPE) at 0.92 V vs. Ag/AgCl was 6.92% with a 43-fold increase when compared to InN (0.16%). The work reported here, supplies practical and effective ideas to construct an InN-based nanorod heterojunction, thereby enhancing the redox reaction dynamics of the PEC water splitting in alkaline pH electrolyte. [ABSTRACT FROM AUTHOR]

Conjugated organic polymers (COPs), such as PM6, with attractive strong visible light absorption and good solution processability have been adopted as photocatalysts for building heterojunctions with InN nanorods for photoelectrochemical (PEC) water oxidation for the first time. Compared with the pure InN system, the PM6 photosensitive layer can effectively inhibit the severe charge recombination on the surface of the nanorod, and improve the kinetics of the oxygen evolution reaction (OER). In addition, the constructed Z-scheme heterojunction can consume the photogenerated holes from PM6 in a rapid and timely manner, thus improving the stability of the photoelectrode. Compared with the bare InN nanorods (0.12 mA cm−2), the improved photoanodes exhibit a significantly enhanced photocurrent density of 4.82 mA cm−2 at 1.45 V vs. RHE, respectively. Moreover, the current density of the photoanode protected by NiFe layered double hydroxide (LDH) can maintain approximately 80% of its initial value after continuous illumination in pH 13 electrolyte for 1 hour, indicating its long-term photochemical stability, which is the optimum value of the reported InN-based photoanodes. This means that InN-based photoanodes can achieve long-term stable PEC water splitting in a wide alkaline pH range, which can be directly used for PEC seawater splitting, eliminating the high cost and cumbersome process of seawater desalination. This work provides a promising method to construct group-III nitride-based photoanodes for high-performance PEC seawater splitting. [ABSTRACT FROM AUTHOR]

With the introduction of potassium species, the catalytic oxidation performance over the Pt1/CeO2 catalyst was significantly enhanced, where potassium ions acted as structural and electronic promoters, and formed Pt–O–K interactions with Pt to directly regulate the coordination environment and electronic state of Pt and the metal-support interaction between Pt and CeO2. [ABSTRACT FROM AUTHOR]

Highly dispersed Ag nanoparticles supported on high-surface-area 3DOM La0.6Sr0.4MnO3 were successfully generated via the dimethoxytetraethylene glycol-assisted gas bubbling reduction route. The macroporous materials showed super catalytic performance for methane combustion. [ABSTRACT FROM AUTHOR]

With the introduction of potassium species, the catalytic oxidation performance over the Pt 1 /CeO 2 catalyst was significantly enhanced, where potassium ions acted as structural and electronic promoters, and formed Pt-O-K interactions with Pt to directly regulate the coordination environment and electronic state of Pt and the metal-support interaction between Pt and CeO 2 .

Highly dispersed Ag nanoparticles supported on high-surface-area 3DOM La0.6Sr0.4MnO3 were successfully generated via the dimethoxytetraethylene glycol-assisted gas bubbling reduction route. The macroporous materials showed super catalytic performance for methane combustion.