CoP-Enhanced CaTiO Single-Electron Oxygen Reduction Piezoelectric Catalysis for HO Production.

Piezoelectric catalytic production of HO is a novel and environmentally friendly HO production method, and many piezoelectric catalysts are currently being developed. However, all of them have the disadvantages of precious metals as cocatalysts and low catalytic efficiency. Herein, CaTiO was successfully prepared and loaded with the nonprecious metal CoP (CoP/CaTiO) for piezoelectric catalytic production of HO.

Ruthenium Clusters Modification Carbon Layer-Encapsulated NiCoP Nanoneedles as Advanced Electrocatalyst for Efficient Seawater Splitting Application.

Developing efficient and durable electrocatalyst for seawater splitting is crucial in hydrogen production. Herein, a multi-scale design strategy was employed to fabricate ruthenium clusters modification carbon layer-encapsulated nickel-cobalt-phosphorus (Ru/C/NiCoP) nanoneedles electrocatalyst supported on nickel foam (NF). We demonstrated that Ru/C/NiCoP/NF exhibited exceptional oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performances, with low overpotential, Tafel slope and superior stability.

Construction of MXene/BiWO Schottky Junction for Highly Efficient Piezocatalytic Hydrogen Evolution and Unraveling Mechanism.

For the first time, a series of MXene (TiCT)/BiWO Schottky junction piezocatalysts were constructed, and the piezocatalytic hydrogen evolution activity was explored. Optimal TiCT/BiWO exhibits the highest piezocatalytic hydrogen evolution rate of 764.4 μmol g h, which is nearly 8 times higher than that of pure TiCT and twice as high as that of BiWO.

Ce-regulating defect and morphology engineering for efficiently enhancing the piezocatalytic performances of BiOBr.

Cerium-doped bismuth oxybromide (1%, 5% and 10% Ce-BiOBr) piezocatalysts were synthesized. The piezocatalytic activity was efficiently regulated by defect and morphology engineering. Among them, the 5% Ce-BiOBr exhibits the highest piezocatalytic hydrogen production property with an evolution rate of 1147.

Strongly Coupled Heterostructured CoP/MoO as an Advanced Electrocatalyst for Urea-Assisted Water Electrolysis.

Developing low-cost electrocatalysts with excellent activity and durability in urea-assisted water splitting is urgently needed in order to achieve sustainable hydrogen production. Herein, we in situ synthesized a robust coupled heterostructured electrocatalyst (CoP/MoO) on a nickel foam (NF) substrate and explored its electrocatalytic performances in the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and urea oxidation reaction (UOR). The overpotential of CoP/MoO/NF is found to be only 11 mV at 10 mA cm during the HER process, which is significantly lower than that of commercial Pt/C.

Construction of oxygen vacancies and heterostructure in VO/NC with enhanced reversible capacity, accelerated redox kinetics, and stable cycling life for sodium ion storage.

Developing anode materials with high reversible capacity, fast redox kinetics, and stable cycling life for Na storage remains a great challenge. Herein, the VO nanobelts with oxygen vacancies supported on nitrogen-doped carbon nanosheets (VO/NC) were developed. Benefitting from the enhanced electrical conductivity, the accelerated kinetics, the increased active sites as well as the constructed 2D heterostructure, the VO/NC delivered extraordinary Na storage performance in half/full battery.

Optically Reconfigurable Complementary Logic Gates Enabled by Bipolar Photoresponse in Gallium Selenide Memtransistor.

To avoid the complexity of the circuit for in-memory computing, simultaneous execution of multiple logic gates (OR, AND, NOR, and NAND) and memory behavior are demonstrated in a single device of oxygen plasma-treated gallium selenide (GaSe) memtransistor. Resistive switching behavior with R /R ratio in the range of 10 to 10 is obtained depending on the channel length (150 to 1600 nm). Oxygen plasma treatment on GaSe film created shallow and deep-level defect states, which exhibit carriers trapping/de-trapping, that lead to negative and positive photoconductance at positive and negative gate voltages, respectively.

Construction of an Advanced NiFe-LDH/MoS-NiS/NF Heterostructure Catalyst toward Efficient Electrocatalytic Overall Water Splitting.

Developing high-efficiency, low-cost, and earth-abundant electrocatalysts toward the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) is highly desirable for boosting the energy efficiency of water splitting. Herein, we adopted an interfacial engineering strategy to enhance the overall water splitting (OWS) activity via constructing a bifunctional OER/HER electrocatalyst combining MoS-NiS with NiFe layered double hydroxide (NiFe-LDH) on a nickel foam substrate. The NiFe-LDH/MoS-NiS/NF electrocatalyst delivers superior OER/HER activity and stability, such as low overpotentials (220 and 79 mV for OER and HER at current densities of 50 and 10 mA cm, respectively) and a low Tafel slope.

Rational design of CdS/BiOCl S-scheme heterojunction for effective boosting piezocatalytic H evolution and pollutants degradation performances.

Piezocatalysis as an emerging technology is broadly applied in hydrogen evolution and organic pollutants degradation aspects. However, the dissatisfactory piezocatalytic activity is a severe bottleneck for its practical applications. In this work, CdS/BiOCl S-scheme heterojunction piezocatalysts were constructed and explored the performances of piezocatalytic hydrogen (H) evolution and organic pollutants degradation (methylene orange, rhodamine B and tetracycline hydrochloride) under strain by ultrasonic vibration.

In Situ Construction of MnO-CoO Nanosheet Heterojunctions on Co@NCNT Surfaces for Oxygen Evolution.

Electrocatalytic water splitting is still circuitous and controversial because of the lack of highly active electrocatalysts to decrease the overpotential. Herein, we report a feasible method for constructing heterojunctions of MnO-CoO nanosheets on Co@NCNT support surfaces (MnO-CoO/Co@NCNT) by spontaneous redox reactions. Experimental results indicate that Co embedded in Co@NCNT can be used as the carbon support and anchoring sites for heterojunctions, thus exposing a large number of active sites, adjusting the surface electronic structure, changing the OER rate-determining step of the catalyst, and reducing the reaction energy barrier.

Sulfur-Bridged Bonds Heightened Na-Storage Properties in MnS Nanocubes Encapsulated by S-Doped Carbon Matrix Synthesized via Solvent-Free Tactics for High-Performance Hybrid Sodium Ion Capacitors.

The exploitation of electrode materials with ability to balance capacity and kinetics between cathode and anode is a challenge for sodium-ion hybrid capacitors (SIHCs). Mn-based anode materials are limited by poor electrical conductivity, sluggish reaction kinetics, large volume variation, weak cycling stability, and inferior reversible capacity. Herein, MnS nanocubes encapsulated in S-doped porous carbon matrix (MSC) with strong sulfur-bridged bond interactions (CSMn) are successfully synthesized by solvent-free tactics.

Doping-engineered bifunctional oxygen electrocatalyst with Se/Fe-doped CoO/N-doped carbon nanosheets as highly efficient rechargeable zinc-air batteries.

Highly efficient oxygen reduction and oxygen evolution reactions have the critical role in the practical application of zinc-air batteries. Herein, doping engineering strategy has been adopted by construction of Se/Fe-doped in CoO/N-doped carbon nanosheets (denoted as Se/Fe-CoO/N-CNs) catalyst for boosting oxygen electrocatalytic activity. The achieved Se/Fe-CoO/N-CNs catalyst presents high-performances electrocatalytic characteristics, which exhibits a small overpotential gap (0.

Boosting the Photocatalytic Activity and Resistance of Photostability of ZnS Nanoparticles.

Defects play a vital role in improving photocatalytic performance. However, the specific influence mechanism of sulfur defects (DSS) on sulfide photocatalytic performance and stability is still unclear. In this work, an ingenious solvent-free self-overflow strategy is designed to introduce DSS into ZnS nanoparticles and explore the specific promotion mechanism of photocatalytic performance and photostability.

Insight into the effect of OH modification on the piezo-photocatalytic hydrogen production activity of SrTiO.

Surface modification by hydrophilic functional group have a tremendous influence on the catalytic activity of photocatalyst, however, there are few reports on improving piezoelectric catalytic performance through surface functionalization. Herein, OH-modified SrTiO was successfully obtained via a novel low-temperature solid-state precursor method and employed as a catalyst for photocatalytic, piezocatalytic and piezo-photocatalytic hydrogen production. Thanks to the super hydrophilic that is facilitating the contact of catalyst and water molecular and the more oxygen vacancies that can promote electron-hole separation, the photocatalytic, piezocatalytic and piezo-photocatalytic hydrogen generation of OH-modified SrTiO (OH-STO) is about two times higher than pristine SrTiO (STO).

Effect of Gd-Doping on Structural, Optical, and Magnetic Properties of NiFeO As-prepared Thin Films via Facile Sol-Gel Approach.

In the present research work, gadolinium-doped nickel ferrite (NiFe Gd O, = 0-0.1) thin films have been synthesized by a facile sol-gel approach. The structural, optical, and magnetic performances of Gd-doping on nickel ferrite films have been investigated.

Effective promoting piezocatalytic property of zinc oxide for degradation of organic pollutants and insight into piezocatalytic mechanism.

The piezoelectric zinc oxides with different morphology (ZnO nanoparticles and nanorods, hereafter abbreviated as ZnO NPs and NRs) are successfully synthesized using facile, green and harmless solid-state chemistry method at room temperature. The piezocatalytic activity of zinc oxide towards methylene blue (MB) of organic pollutants degradation has been explored under ultrasonic vibration. The ZnO NRs exhibit effectively enhanced piezocatalytic performance towards degradation dye compared with the ZnO NPs.

Annealing atmosphere effect on the resistive switching and magnetic properties of spinel CoO thin films prepared by a sol-gel technique.

Spinel CoO thin films were synthesized using a sol-gel technique to study the annealing atmosphere effect on resistive switching (RS) and magnetic modulation properties. Compared with oxygen and air annealed Pt/CoO/Pt stacks, the nitrogen annealed Pt/CoO/Pt stack shows optimal switching parameters such as a lower forming voltage, uniform distribution of switching voltages, excellent cycle-to-cycle endurance (>800 cycles), and good data retention. Improvement in switching parameters is ascribed to the formation of confined conducting filaments (CFs) which are composed of oxygen vacancies.