1,721,034 research outputs found
Synthesis, Surface Chemistry, and Applications of Non-Zero-Dimensional Diamond Nanostructures
No full textDiamond nanomaterials are renowned for their exceptional properties, which include the inherent attributes of bulk diamond. Additionally, they exhibit unique characteristics at the nanoscale, including high specific surface areas, tunable surface structure, and excellent biocompatibility. These multifaceted attributes have piqued the interest of researchers globally, leading to an extensive exploration of various diamond nanostructures in a myriad of applications. This review focuses on non-zero-dimensional (non-0D) diamond nanostructures including diamond films and extended diamond nanostructures, such as diamond nanowires, nanoplatelets, and diamond foams. It delves into the fabrication, modification, and diverse applications of non-0D diamond nanostructures. This review begins with a concise review of the preparation methods for different types of diamond films and extended nanostructures, followed by an exploration of the intricacies of surface termination and the process of immobilizing target moieties of interest. It then transitions into an exploration of the applications of diamond films and extended nanostructures in the fields of biomedicine and electrochemistry. In the concluding section, this article provides a forward-looking perspective on the current state and future directions of diamond films and extended nanostructures research, offering insights into the opportunities and challenges that lie ahead in this exciting field. This review article summarizes the start-of-art of the synthesis and surface chemistry of diamond films and diamond nanostructures, followed by the highlights of their applications in the fields of sensing, energy, catalysis, and biomedicine. The perspectives of synthesis, surface chemistry, and applications of diamond films and nanostructures are also discussed and outlined. imageN.Y. thanks the financial support from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under the Project No. 457444676. C.L. thanks Dr. Z. Zhai (Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences), X. Chen, X. Dong, and Y. Li (Institute of Materials Engineering, University of Siegen) for their advice and proofreading the paper
Design and Performance of Rh Nanocatalysts for Boosted H2 Generation in Alkaline Media
No full textThis work was supported by the Shanxi Province Science Foundation (20210302124446 and 202102070301018) and the Basic Research Project from Institute of Coal Chemistry, CAS (SCJC-HN-2022-17)
Construction and Progress of Small Molecule-Based Coupled Electrolyzers
No full textCoupled electrolyzer is a desirable way to realize efficient energy conversion from electricity to chemical energy. Using coupled electrolyzers highly valuable chemicals (e.g., H2, CHxCOO-, nitrile, S, NH3, CO) can be obtained at low voltages, environmental pollutants can be alleviated, and wastewater (e.g., ammonia, urea, hydrazine) can be recycled. They are even helpful to realize the goal of carbon peaking and carbon neutrality. Compared to traditional chemical methods, small molecule-based coupled electrolyzers are more cost-efficient. This review summarizes state-of-art of coupled electrolyzers, mainly the replacement of oxygen reduction reaction with oxidation reactions of small molecules and their further coupling with cathodic reduction reactions such as hydrogen evolution reaction (HER), oxygen reduction reaction (ORR), CO2 reduction reaction (CO2RR), N2 reduction reaction (NRR), and other reduction reactions of matching small molecules. In terms of oxidation reactions of small molecules, two types of reactions are covered: sacrificial agent oxidation reaction (SAOR) and electrochemical synthesis reaction (ESR). After detailing the design principle of coupled electrolyzers and several oxidation reactions of small molecules, construction, characterization, and performance of coupled electrolyzers are systematically overviewed along with discussion and outline of current challenges and prospects of this appealing strategy. This review summarizes state-of-art of coupled electrolyzers, the integration of oxidation reactions of small molecules (including sacrificial agent oxidation reaction and electrochemical synthesis reaction with reduction reactions including hydrogen evolution reaction, oxygen reduction reaction, CO2 reduction reaction, and N2 reduction reaction. Current challenges and prospects of this appealing strategy are discussed and outlined. imageThis work was supported by Shanxi Province Science Foundation (20210302124446 and 202102070301018), and Basic Research Project from the Institute of Coal Chemistry, CAS (SCJC-HN-2022-17)
Diamond Chemistry: Advances and Perspectives
No full textDiamond as a material has many unique properties. Its high optical dispersion, extraordinarily high mechanical strength, and unparalleled thermal conductivity have long made it a material of interest for applications such as high-temperature electronics and as wear-resistance coatings. More recently, diamond has emerged as a material with a wide range of applications in chemistry and biology. The high intrinsic stability of diamond, coupled with the ability to modify diamond surfaces with a wide range of inorganic, organic, and biological species via highly stable covalent linkages, provides a wealth of opportunity to couple diamond's chemical properties with its extraordinary physical properties. The practical utility of diamond has been greatly expanded in recent years through dramatic advances in the ability to produce diamond in bulk, thin film, and nanoparticle form, with controlled doping and purity at modest cost. These advances, together with diamond's highly stable and tunable surface chemistry with versatility of physical structure enable a wide range of emerging applications of interest to chemists, including quantum science, biomedicine, energy storage, and catalysis. Yet, to fully exploit the unique properties of diamond, some formidable chemical challenges lie ahead.We begin by reviewing some of the features of diamond that are of particular importance to the chemistry community. We aim to highlight some of the important applications where diamond chemistry plays a key role, identify some of the key observations, and outline some of the future directions and opportunities for diamond in the chemical world.N.Y. thanks the financial support from the DeutscheForschungsgemeinschaft (DFG, German Research Founda-tion) under the project of 457444676. A.K. thanks the GermanScience Foundation, Projects 501932605 and 501934692, theBMBF Cluster4Future QSens, and the European Commissionfor projects SUNGATE (101122061) and DIACAT (665085),and the QPhoton Center of the Carl Zeiss Foundation for thesupport of our research. Contributions by R.J.H. are basedon material supported by the National Science Foundationgrants DMR-1904106, CHE-1839174, and CHE-2001611 forsupport of research in diamond-based electron emission, inquantum chemical sensing, and in nanoscale probing of thenanoparticles in the environment, respectively.Open access funding enabled and organized by ProjektDEA
Photocatalytic and Electrocatalytic Generation of Hydrogen Peroxide: Principles, Catalyst Design and Performance
Full text linkThis work was supported by Shanxi Province Science Foundation (20210302124446; 202102070301018), the National Natural Science Joint Foundation (U1710112) and Basic Research Project from the Institute of Coal Chemistry, CAS (SCJC-HN-2022-17)
Diamond Composite: A “1 + 1 > 2” Strategy to Design and Explore Advanced Functional Materials
No full textX.C. thanks theChina ScholarshipCouncil (CSC) for the financial support (No. 202008420219).X.D. thanks theCSC forthefinancialsupport(No.202106250006).N.Y. thanksthe financial support fromtheDeutscheForschungsgemeinschaft (DFG,GermanResearchFoundation)under theProjectNo. 457444676
High-Performance Supercapacitors Using Hierarchical And Sulfur-Doped Trimetallic NiCo/NiMn Layered Double Hydroxides
No full textA supercapacitor features high power density and long cycling life. However, its energy density is low. To ensemble a supercapacitor with high power- and energy-densities, the applied capacitor electrodes play the key roles. Herein, a high-performance capacitive electrode is designed and grown on a flexible carbon cloth (CC) substrate via a hydrothermal reaction and a subsequent ion exchange sulfuration process. It has a 3D heterostructure, consisting of sulfur-doped NiMn-layered double hydroxide (LDH) nanosheets (NMLS) and sulfur-doped NiCo-LDH nanowires (NCLS). The electrode with sheet-shaped NMLS and wire-shaped NCLS on their top (NMLS@NCLS/CC) increases the available surface area, providing more pseudocapacitive sites. It exhibits a gravimetric capacity of 555.2 C g-1 at a current density of 1 A g-1, the retention rate of 75.1% when the current density reaches up to 20 A g-1, as well as superior cyclic stability. The assembled asymmetric supercapacitor that is composed of a NMLS@NCLS/CC positive electrode and a sulfurized activated carbon negative electrode presents a maximum energy density of 24.2 Wh kg-1 and a maximum power density of 16000 W kg-1. In this study, a facile strategy for designing hierarchical LDH materials is demonstrated as well as their applications in advanced energy storage systems. On a flexible carbon cloth, sulfur-doped NiMn-layered double hydroxides (LDH) nanosheets (NMLS) and sulfur-doped NiCo-LDH nanosheets (NCLS) are emerged into a 3D heterostructure. Using this NMLS@NCLS/CC positive electrode and a sulfurized activated carbon negative electrode, an ensembled asymmetric supercapacitor features high-performance, including high-power- and energy-densities as well as long-term stability.imageThis work was financially supported by the Natural Science Foundation of Hubei Province, China (no.2021CFB1192), the Graduate Innovative Fund of Wuhan Institute of Technology of China (CX2022410), Youths Science Foundation of Wuhan Institute of Technology (no.19QD36), and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation, no. 457444676)
A TiC@TiO2-C Support for Pt Catalysts to Boost the Oxygen Reduction Reaction
No full textThis work was supported by the Shanxi Province Science Foundation (20210302124446, 202102070301018), the Basic Research Project from Institute of Coal Chemistry, CAS (SCJC-HN-2022-17)
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