Low-Rh/MoC/N-doped carbon nanofibers as robust bifunctional electrocatalyst for hydrazine oxidation-assisted H generation and Zn-hydrazine battery.

Replacing the sluggish anodic oxygen evolution reaction (OER) with thermodynamically favorable hydrazine oxidation reaction (HzOR) constitutes a transformative approach for advancing energy-efficient hydrogen (H) production. Herein, we fabricate Rh nanoparticles anchored on MoC/N-doped carbon nanofibers (MoC/NCNFs) as a bifunctional electrocatalyst for simultaneous HzOR and hydrogen evolution reaction (HER). Through optimizing Rh loading, the MoC/NCNFs-6Rh catalyst achieves a record-low potential of -0.

Activating RuO nanofibers through precise Re doping toward promoted alkaline water electrolysis under high current density exceeding 1 A cm.

Ruthenium dioxide (RuO) stands out as a versatile catalyst for acidic oxygen evolution reactions (OER), yet it falls short in alkaline conditions, and its hydrogen evolution reaction (HER) activity is generally lacking. This poses a significant challenge in engineering a robust bifunctional electrocatalyst capable of excelling in both alkaline HER and OER through manipulating the electronic structure of RuO. Here, we have developed a nanofibrous rhenium (Re)-doped RuO electrocatalyst via an electrospinning-calcination process, tailored for comprehensive water splitting applications.

Deep Reconstruction of RuPdO Hollow Nanofibers for Efficient Electrocatalytic Hydrazine Oxidation-Assisted Hydrogen Production.

Manipulating the reconstruction of a heterostructured material is highly desirable to achieve high-performance electrocatalytic performance. Here, an in situ reconstruction of RuPdO hollow nanofibers (HNFs) is presented to generate RuO/Pd from both the electrochemical and chemical reconstruction processes. The reconstructed catalyst is highly efficient for both hydrazine oxidation reaction (HzOR) and hydrogen evolution reaction (HER) at industrial-grade current densities, significantly outperforming the benchmark Pt/C catalyst.

Incorporation of elemental Ag into CeO nanotubes enables a significantly enhanced electrocatalytic nitrate-to-ammonia performance.

Among the array of strategies available for the treatment of nitrates in wastewater, the electrocatalytic reduction process to generate green ammonia stands out as a particularly promising approach. However, the intricate eight-electron reduction mechanism and the competitive hydrogen evolution reaction (HER) pose significant challenges in developing highly efficient and selective catalysts for nitrate reduction reaction (NORR). In this study, elemental Ag encapsulated within cerium dioxide (CeO) nanotubes (NTs) is successfully fabricated for the electrocatalytic NORR.

Interfacial engineering of a nanofibrous Ru/CrO heterojunction for efficient alkaline/acid-universal hydrogen evolution at the ampere level.

Interfacial engineering of a heterostructured electrocatalyst is an efficient way to boost hydrogen production, yet it still remains a challenging task to achieve superior performance at ampere-grade current density. Herein, a nanofibrous Ru/CrO heterojunction is prepared for alkaline/acid-universal hydrogen evolution. Theoretical calculations reveal that the introduction of CrO modulates the electronic structure of Ru, which is beneficial for *H desorption, resulting in a superior HER performance at ampere-grade current density.

Nanofibrous Ru/SnO heterostructure as robust bifunctional electrocatalyst for high-performance overall hydrazine splitting and Zn-hydrazine battery.

Water electrolysis represents a green and efficient strategy for hydrogen (H) production. However, the four-electron transfer process involved in its anodic oxygen evolution reaction (OER) half-reaction restricts the H generation rate. Employing hydrazine oxidation reaction (HzOR) as a substitute for OER in H generation can dramatically reduce energy consumption.

Shell-induced enhancement of Fenton-like catalytic performance towards advanced oxidation processes: Concept, mechanism, and properties.

Fenton-like advanced oxidation processes (AOPs) are commonly used to eliminate recalcitrant organic pollutants as they produce highly reactive oxygen species through the reactions between the catalysts and oxidants. Recently, considerable attention has been directed towards shell-structured Fenton-like catalysts that offer high stability, maximum utilization of active sites, and exceptional catalytic performance. In this review, we have introduced the concept of several typical shell-forming architectures (e.

Partial oxidation of Rh/Ru nanoparticles within carbon nanofibers for high-efficiency hydrazine oxidation-assisted hydrogen generation.

Hydrazine oxidation reaction (HzOR), an alternative to oxygen evolution reaction, effectively mitigates hydrazine pollution while achieving energy-efficient hydrogen production. Herein, partially oxidized Ru/Rh nanoparticles embedded in carbon nanofibers (CNFs) are fabricated as a bifunctional electrocatalyst for hydrogen evolution reaction (HER) and HzOR. The presence of multiple components including metallic Ru and Rh and their oxides provides numerous electrochemically active sites and superior charge transfer properties, thus improving the electrocatalytic performance.

Interface Engineering of the CuMnO/CeO Heterostructure for Highly Efficient Electrocatalytic Nitrate Reduction to Ammonia.

The electrochemical nitrate reduction reaction (NORR) is considered a sustainable technology to convert the nitrate pollutants to ammonia. However, developing highly efficient electrocatalysts is necessary and challenging given the slow kinetics of the NORR with an eight-electron transfer process. Here, a CuMnO (CMO)/CeO heterostructure with rich interfaces is designed and fabricated through an electrospinning and postprocessing technique.

Synergistic Integration of Amorphous Cobalt Phosphide with a Conductive Channel for Highly Efficient Electrocatalytic Nitrate Reduction to Ammonia.

Electrocatalytic nitrate reduction to ammonia (NORR) is regarded as a viable alternative reaction to "Haber Bosch" process. Nevertheless, it remains a major challenge to explore economical and efficient electrocatalysts that deliver high NH yield rates and Faraday efficiencies (FE). Here, it demonstrates the fabrication of a 3D core-shell structured Co-carbon nanofibers (CNF)/ZIF-CoP for NORR application.

Highly Active and Stable Alkaline Hydrogen Evolution Electrocatalyst Based on Ir-Incorporated Partially Oxidized Ru Aerogel under Industrial-Level Current Density.

The realization of large-scale industrial application of alkaline water electrolysis for hydrogen generation is severely hampered by the cost of electricity. Therefore, it is currently necessary to synthesize highly efficient electrocatalysts with excellent stability and low overpotential under an industrial-level current density. Herein, Ir-incorporated in partially oxidized Ru aerogel has been designed and synthesized via a simple in situ reduction strategy and subsequent oxidation process.

Rational design of bimetal phosphide embedded in carbon nanofibers for boosting oxygen evolution.

The development of non-precious metal electrocatalysts for oxygen evolution reaction (OER) is crucial for generating large-scale hydrogen through water electrolysis. In this work, bimetal phosphides embedded in electrospun carbon nanofibers (P-FeNi/CNFs) were fabricated through a reliable electrospinning-carbonization-phosphidation strategy. The incorporation of P-FeNi nanoparticles within CNFs prevented them from forming aggregation and further improved their electron transfer property.

Significantly Enhanced Energy-Saving H Production Coupled with Urea Oxidation by Low- and Non-Pt Anchored on NiS-Based Conductive Nanofibers.

Rational designing electrocatalysts is of great significance for realizing high-efficiency H production in the water splitting process. Generally, reducing the usage of precious metals and developing low-potential nucleophiles oxidation reaction to replace anodic oxygen evolution reaction (OER) are efficient strategies to promote H generation. Here, NiS-coated nickel-carbon nanofibers (NiS@Ni-CNFs) are prepared for low-content Pt deposition (Pt-NiS@Ni-CNFs) to attain the alkaline HER catalyst.

Interface Reversible Electric Field Regulated by Amphoteric Charged Protein-Based Coating Toward High-Rate and Robust Zn Anode.

Metallic interface engineering is a promising strategy to stabilize Zn anode via promoting Zn uniform deposition. However, strong interactions between the coating and Zn and sluggish transport of Zn lead to high anodic polarization. Here, we present a bio-inspired silk fibroin (SF) coating with amphoteric charges to construct an interface reversible electric field, which manipulates the transfer kinetics of Zn and reduces anodic polarization.

Controllable growth of Fe-doped NiS on NiFe-carbon nanofibers for boosting oxygen evolution reaction.

The construction of high-efficiency and low-cost electrocatalysts toward oxygen evolution reaction (OER) to improve the overall water decomposition performance is a fascinating route to deal with the clean energy application. Herein, Fe-doped NiS crystals grown on the surface of carbon nanofibers (CNFs) encapsulated with NiFe alloy nanoparticles ((Ni,Fe)S/NiFe-CNFs) are fabricated through an electrospinning-calcination-vulcanization process, which has been used as a splendid electrocatalyst for OER. Benefitting from the abundant electrochemical active sites from the incorporation of Fe element in NiS and the synergistic effect between NiFe-CNFs and surface sulfides, the obtained (Ni,Fe)S/NiFe-CNFs catalyst exhibits highly electrochemical activities and satisfactory durability toward OER in an alkaline medium with a low overpotential of only 287 mV at a high current density of 30 mA cm, and with a little decline in the current retention after 48 h, suggesting its superior OER performance even compared with some noble metal-based electrocatalysts.

Two-dimensional poly(3,4-ethylenedioxythiophene) nanosheets for highly electrochemical detection of iodide ions.

Two-dimensional (2D) nanomaterials-modified electrodes are good candidates for electrochemical sensing because of their unique ultrathin sheet-like structure and distinctive electrical property. In this work, we have developed a facile sacrificial template-directed mild polymerization process to prepare 2D poly(3,4-ethylenedioxythiophene) (PEDOT) nanosheets. During the polymerization process, VO·nHO nanosheets are used as both sacrificial templates and oxidants, which can not only guide the production of PEDOT nanosheets, but also spontaneously be removed after the reaction.

Bimetallic MOF Nanosheets Decorated on Electrospun Nanofibers for High-Performance Asymmetric Supercapacitors.

The rational design of metal-organic framework (MOF)-based materials with a huge specific surface area, high redox activity, and favorable conductivity is currently a hot subject for their potential usage in supercapacitor electrodes. Herein, novel bimetallic MOFs with a flowerlike nanosheet structure grown on the electrospun nanofibers (PPNF@M-Ni MOF, M = Co, Zn, Cu, Fe) have been prepared by controlling the incorporation of various types of metal ions, which display superior electrochemical performance. For example, PPNF@Co-Ni MOF possesses a large specific capacitance of 1096.

Fe(III)-Tannic Acid Complex Derived FeC Decorated Carbon Nanofibers for Triple-Enzyme Mimetic Activity and Their Biosensing Application.

In the past decade, nanomaterials-based artificial enzymes have emerged as a hot spot in the field of catalysis. However, it is a significant challenge to fabricate functional nanomaterials for multiple-enzyme mimetic activity. In this work, we have presented an efficient catalytic platform to mimic peroxidase, oxidase, and catalase-like activity by FeC decorated carbon nanofibers (FeC/C NFs).

An efficient thin-walled Pd/polypyrrole hybrid nanotube biocatalyst for sensitive detection of ascorbic acid.

Controllable fabrication of novel and uniform noble metal nanoparticles on a specific support with a superior catalytic or electrocatalytic performance is of significantly importance for practical applications. In this report, we demonstrated an effective way to fabricate uniform thin-walled Pd/polypyrrole (PPy) hollow nanotubes. The prepared Pd/PPy hybrid nanotubes exhibited an excellent peroxidase-like activity to oxidize a typical peroxidase substrate such as 3,3',5,5'-tetramethylbenzidine in comparison with traditional Pd/C and Pd black catalysts.

Self-templated fabrication of FeMnO nanoparticle-filled polypyrrole nanotubes for peroxidase mimicking with a synergistic effect and their sensitive colorimetric detection of glutathione.

A self-templated approach has been developed for the preparation of FeMnO3 nanoparticles filled in the hollow core of polypyrrole (PPy) nanotubes by an in situ polymerization process accompanied by the etching of FeMnO3 nanofibers. The prepared FeMnO3@PPy nanotubes exhibited a superior peroxidase-like activity. The catalytic reaction system has been used for the sensitive colorimetric detection of glutathione with a low detection limit and good selectivity.