MOF-Derived Porous Ternary Nickel Iron Nitride Nanocube as a Functional Catalyst toward Water Splitting Hydrogen Evolution for Solar to Chemical Energy Conversion

Abstract

Prussian blue analogue (PBA)-derived porous ternary metallic nitride (Ni3FeN) has been successfully prepared through a simple two-step oxidation–rapid nitridation process and used for the photocatalytic hydrogen evolution reaction. The porous structure of the Ni3FeN nanocube contributes to the adsorption of the Eosin-Y photosensitizer, while also ensuring sufficient exposed active sites. This aids in improved reaction kinetics of the photocatalytic hydrogen evolution reaction. Moreover, the superior conductivity of ternary Ni3FeN promotes the transfer of charge carriers excited from Eosin-Y, which also promotes the photocatalytic performances of Ni3FeN/Eosin-Y systems. When used with Eosin-Y as a dye photosensitizer, the porous ternary Ni3FeN nanocube exhibits superior performance, which is more than 3.45, 3.83, and 1.31 times higher than that of the PBA, NiFeO x , and Prussian blue-derived Fe3N samples. The Ni3FeN catalyst exhibits an optimal H2 production rate of 16.96 mmol g–1 h–1, with an apparent quantum efficiency of ∼3.03% at 520 nm excitation wavelength.

Crystal phase engineering of Ru for simultaneous selective photocatalytic oxidations and H2 production

“…A smaller arc radius means that the catalysts resistance is lower and thus possesses better charge transfer properties. 42,43 This shows that the Ru/ TiO 2 composites, and especially fcc Ru/TiO 2 , have a strongly reduced charge transfer resistance with the solution compared to pristine TiO 2 , which leads to an enhanced photoactivity.…”

Emerging transition metal nitrides in solar energy conversion: design strategies and future perspectives for efficient photocatalysis

“…74 Recent works have demonstrated that the combination of TMN materials with photosensitizers can also exhibit excellent photocatalytic performance. 75,76 Unlike traditional semiconductor materials, these TMN materials developed for dye-sensitized photocatalytic systems are usually conductive materials and cannot be considered as photocatalysts. They primarily serve the purpose of electron transfer and providing active sites for chemical reactions.…”

“…5h), often possess advantages such as a higher density of active sites and shorter carrier transfer distances. 66,76 Taking a Prussian blue-derived iron nitride nanocube catalyst as an example, this iron nitride (Fe 2 N) nanocube exhibits higher photocatalytic dye-sensitized hydrogen evolution activity than its nanoparticle counterpart derived from the same Prussian blue precursor. 108 Therefore, by utilizing specialized synthesis methods to prepare TMNs with unique morphologies and designing TMN-based photocatalysts based on them, it becomes possible to achieve improved photocatalytic efficiency.…”

“…108 These methods include, but are not limited to, rapid nitridation method, molten salt method, and solvothermal method. 66,76,108 Of course, compared to the synthesis of ordinary nanoparticles or bulk materials, the fabrication of TMNs with unique morphology does come with certain challenges and complexities. Therefore, the development of more methods to synthesize TMNs with unique morphologies remains highly anticipated.…”

Luminescent MOF-Based Nanofibers with Visual Monitoring and Antibacterial Properties for Diabetic Wound Healing

“…With the progress of nanotechnology, metal–organic frameworks (MOFs) as new porous nanomaterials have aroused considerable research interest. − Due to their peroxidase-like activity, low toxicity, high porosity, and large specific surface area, MOFs have been widely used in catalysis, , sensing, , drug delivery, , gas storage, , and optical devices. , Recently, the potential of MOFs was further exploited for extensive sensing and antibacterial treatment fields by loading fluorescent probes − and biological enzymes. − However, these studies were limited to single function applications such as monitoring or sterilization, the construction of MOF-based multifunctional NFs for diabetic wound healing management is an urgent need.…”