Carbon Neutralization最新文献

The rational construction of Ti₃C₂T_x MXene-based composites has been deemed as a popular way to improve their electrochemical energy storage performances owing to the unique two-dimensional (2D) structure, excellent conductivity, and good flexibility. However, it remains a major challenge to assemble mesoporous carbon onto Ti₃C₂T_x with fewer oxygen-containing groups by using surfactants with short hydrophilic segments. In the work, we propose a molecular engineering assembly strategy for the growth of N,P co-doped mesoporous carbon onto Ti₃C₂T_x nanosheets (NPMC/Ti₃C₂T_x) under the assistance of phytic acid by using melamine-formaldehyde resin and pluronic P123 (PEO₂₀PPO₇₀PEO₂₀) as the carbon/nitrogen source and soft template, respectively. The detailed investigations reveal that phytic acid with abundant hydroxyl groups can effectively enhance the hydrogen bond interactions among P123, carbon precursor, and Ti₃C₂T_x nanosheets, thus ensuring the efficient assembly of mesoporous carbon onto Ti₃C₂T_x. The obtained NPMC/Ti₃C₂T_x composite demonstrates a set of merits, including cylindrical mesopore, N,P co-doping, and a good combination of mesoporous carbon and Ti₃C₂T_x nanosheets. As a result, it exhibits an improved lithium-ion storage performance, delivering a high reversible capacity of 556.3 mA h g⁻¹ after 100 cycles at 0.1 A g⁻¹. The present work provides a feasible molecular engineering assembly route for the rational design of high-performance Ti₃C₂T_x MXene-based electrodes.

Two-dimensional (2D) transition metal carbonitrides/nitrides (MXene) materials have proven to be promising alternatives as novel capacitor-type electrodes for aqueous Zn-ion hybrid microsupercapacitors (ZHMSCs). However, during self-assembly processes, serious restacking between 2D MXene nanosheets induced by strong van der Waals forces makes ion transport channels narrow within the compact MXene film electrodes, which would result in poor energy output of ZHMSCs. Herein, interlayer transport channel engineering is designed by intercalating bacterial cellulose (BC) between MXene interlayers to develop MXene/BC electrodes with fast ion transport channels in contrast to pure MXene electrodes. Benefiting from fast anion intercalation/deintercalation on MXene/BC capacitor-type cathode and reversible Zn stripping/plating on Zn foil anode, the fabricated ZHMSCs exhibit wide working potential windows (1.36 V), high areal capacitance (404 mF cm⁻²), and landmark areal energy density (94 µWh cm⁻² at 1 mA cm⁻²). The areal capacitance and energy density of the developed ZHMSCs are much higher than those of the ZHMSCs based on pure MXene capacitor-type cathode (239 mF cm⁻²/57 µWh cm⁻² at 1 mA cm⁻²). Besides, the developed ZHMSCs can perform more than 10,000 cycles, showing outstanding capacity retention. In general, our work provides a novel strategy to break through the performance bottlenecks afflicting MXene-based ZHMSCs.

In this study, we synthesized a novel corrosion inhibitor derived from thiophene and conducted a comprehensive evaluation of its inhibitory properties through both experimental and theoretical approaches. Our investigation encompassed experimental assessments employing Mass loss tests and electrochemical techniques. Additionally, we performed computational studies to delve into the electronic structure and bonding characteristics of the inhibitor, aiming to elucidate its inhibitory mechanism. Our findings revealed that the synthesized inhibitor displayed remarkable inhibitory efficiency, demonstrating its effectiveness in preventing the corrosion of mild steel. Specifically, the thiophene derivative exhibited an impressive inhibitory efficiency of 92.8%, underscoring its potential as a robust corrosion inhibitor for mild steel. Furthermore, this study delved into optimizing the conditions for employing the thiophene derivative as a corrosion inhibitor. Our investigation revealed that the most effective inhibition was achieved at a concentration of 0.5 mM and a temperature of 303 K. To elucidate the interaction between the inhibitor and the mild steel surface, we applied the Langmuir adsorption isotherm concept, shedding light on both the physical and chemical adsorption processes of the thiophene derivative on the metal's surface. Our investigations demonstrated that the addition of the inhibitor significantly reduced the corrosion rate of the metal. Our computational results further reinforced these experimental findings, indicating that the inhibitor formed stable adsorption complexes on the metal surface. This dual confirmation from experimental and computational approaches strengthens the confidence in the inhibitor's efficacy in mitigating corrosion.

The effective storage and utilization of hydrogen energy is expected to solve the problems of energy shortage and environmental pollution currently faced by human society. Metal–organic framework materials (MOFs) have been shown by scientists to be very potential hydrogen storage materials. However, the current design methods and strategies for MOFs are still generally in the trial-and-error stage, and the research works are at the overall level. To solve the problems of directional design and rational construction of new MOFs, this work uses the principles and methods of coordination chemistry and crystal engineering to carry out the theoretical design and mechanism research of new MOFs for high-efficiency hydrogen storage application scenarios. In this study, the structures selected for theoretical calculation were divided into two types: different ligands for the same metal (IRMOFs, MOF-205, and DUT-23-Zn) and different metals for the same ligand (DUT-23-M [(M = Co, Ni, Cu, and Zn]). The model construction process, hydrogen loading with temperature, specific surface area, hydrogen adsorption energy, charge density and hydrogen storage mechanism of the above structures were analyzed, and the key indicators that may affect the hydrogen storage performance of MOFs were summarized: type and quantity of coordination metals, temperature, pressure, adsorption site and specific surface area.

Back cover image: The electric mobility is considered to be a key step towards achieving the vision of carbon neutrality, and the high carbon footprint of electric vehicle (EV) power batteries is a critical factor affecting the ability of EV to reduce carbon emissions. In 10.1002/cnl2.81, the researchers organize the carbon accounting standards of the automotive industry and compare the lifecycle carbon emissions of various types of vehicles, pointing out the advantages of EV in reducing carbon emissions, as well as the concentration of carbon emissions in EV lifecycle. And the researchers elaborated how to reduce the lifecycle carbon emissions of EV from the automobile industry chain. Finally, focusing on power batteries, it concludes that fine management, echelon utilization, and efficient recycling are ways to reduce their contribution to the carbon emissions of EV.

Front cover image: Calcium-ion batteries (CIBs) have received growing attention by the research community due to favorable Ca deposition potential, materials sustainability, and cost effectiveness. Cathode research on materials discovery and mechanistic understanding is the key to push forward the development of CIBs. In article number 10.1002/cnl2.85, the most recent advances in CIB cathode research are summarized, with a focus on showcasing the cathode structure-performance relationship. Also, research directions that are worth being investigated are presented with a view to fully realizing the potential benefits of CIBs, an emerging energy storage technology.

Graphitic carbon nitride is a promising material as an electrode material for advanced electrochemical energy storage devices because of its controllable structure, physicochemical properties, and abundant active sites. However, its intrinsic properties as electrode materials can not be fully expressed owing to limited electrical properties, which impede charge transfer and material exchange inside devices. During the past decade, the challenge has been addressed through material engineering strategies, such as exfoliation and composition, and then advanced energy devices, such as supercapacitors, have been assembled. In this regard, a timely review of graphitic carbon nitride for high-performance supercapacitors requires to be put forward for summarizing past studies and inspiring future research works as well. This review article summarizes recent progress in material synthesis and property regulation of graphitic carbon nitride nanomaterials and their application in assembling advanced supercapacitors with high energy density and superior working stability. Finally, based on existing research and our experimental experience, a perspective for directing future research has been presented concerning material synthesis and electrochemical application of graphitic carbon nitride.

Conducting polymer composites possessing excellent electromagnetic interference shielding effectiveness (EMI SE) are effective methods to prevent the harm caused by electromagnetic pollution. Since COVID-19 in 2019, people have made a lot of progress in the recycling of waste face masks (FMs). Besides, effective measures are needed to reduce the harm of microplastics (MPs) pollution in the water environment. However, so far, no publications are available in the literature that simultaneously solve the problem of electromagnetic pollution, FM pollution, and MP pollution. Herein, FMs, polystyrene MPs (PS MPs), and graphene (Gr) were used to fabricate EMI shielding composites with isolated conductive network structures via the adhesion of polydopamine (PDA). The effects of isolated conductive networks, different sizes of PS MPs, and different layers of FMs on the adsorption properties of FMs-PDA-Gr, as well as electrical performance for the obtained polypropylene-PDA-Gr composites, were studied. The composites displayed EMI SE for 29.3 dB in X-band with 2 vol.% Gr content due to the isolated conductive network structure, which may be useful to the simultaneous elimination of garbage from electromagnetic pollution, FMs pollution, and MPs pollution to a certain degree.

In the post-lithium-ion battery era, calcium-ion batteries (CIBs) have aroused extensive attention because of their strong cost competitiveness, low standard redox potentials, and high safety. However, the related research is progressing slowly due to the constraints of the development of electrode materials. The large ionic radius of Ca²⁺ especially increases the challenge to design cathode materials for reversible Ca²⁺ uptake/removal. Despite the inspiring achievements, various challenges still need to be further resolved. Here, this review systematically summarizes the recent advances in CIB cathode materials, including Prussian blue and its analogues, metal oxides, metal chalcogenides, polyanionic compounds, and organic materials. We first provide a brief introduction to CIBs and compare their advantages with other battery technologies. Then, preparation methods are introduced, and breakthrough investigations are highlighted. Finally, some possible research directions are discussed to promote the development of this emerging battery technology.

The increasing utilization of fossil fuels and industrial activities has resulted in a surge of CO₂ emissions, which have significantly impacted global climate change. Carbon capture and utilization technologies offer a promising solution to decrease atmospheric CO₂ concentrations and convert CO₂ into valuable products. This study focuses on the capture and storage of CO₂ through the mineralization of magnesium-containing materials. The analysis encompasses the mineralization process of solid and liquid minerals, the various mineralization processes of magnesium-containing minerals categorized as direct and indirect mineralization, and the latest research advancements in magnesium-containing minerals. Brine and seawater from salt lakes are considered the most appropriate materials for mineralization due to their abundance and the simplicity of the process compared to solid mineralization. This paper analyzes the impact of temperature, impurity ions, additives, and microorganisms on the process of magnesium carbonate synthesis crystallization. The use of magnesium-containing materials for carbon dioxide sequestration can effectively reduce carbon emission. The review offers guidance on carbon dioxide mineralization and explores the potential applications of magnesium mineralization.