RARE METALS
·
2021
·Vol. 40
·期 9
·2455-2463
·
IF 4.003
Jia Xin-Xin,Yu Xin-Zhi,Lu Bing-An
Potassium-selenium (K-Se) batteries are a promising electrical energy storage candidate because of the cost-effectiveness and material sustainability, yet they suffer from shuttle effect, volume expansion and low powder density. The development of Se-based cathode is an effective way to overcome the above issues. Here we designed a hollow nano-spherical Co-Fe bi-metallic selenide coated with N-doped carbon (denoted as CFS@N-C) as cathode for K-Se batteries. Bimetallic selenide is benefit to improve the conductivity of composite materials; N-doped carbon layer encapsulation effectively inhibits the dissolution of poly-selenides and relieves the volume expansion. The as-prepared K-Se battery exhibits excellent rate performance (300 mAh·g –1 at 1000 mA·g –1 ) and slow-charge/ultrafast-discharge capability (discharge at 5000 mA·g –1 and charge at 100 mA·g –1 with ultrahigh capacity of 227 mAh·g –1 ) with Coulombic efficiency nearly 100%. In addition, the ex-situ high-resolution transmission electron microscopy (HRTEM) images reveal that the charge–discharge mechanism of CFS@N-C is K + replaces the bimetal and forms K 2 Se. The unique design in this work may provide certain directions on researching for high power density K-storage materials.
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RUSSIAN JOURNAL OF ORGANIC CHEMISTRY
·
2025
·Vol. 61
·期 5
·872-880
·
IF 0.9
Tong Mengnan
A versatile, convenient, mild, and efficient method for the synthesis of N-benzoyloxyamines containing alkenone or allyl ester groups, starting from hydroxylamine derivatives, is developed and successfully extended to a broader range of tertiary amine analogs.
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JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Zonghua Pu,Qian Liu,Chun Tang,Abdullah M. Asiri,Abdullah H. Qusti,Abdulrahman O. Al-Youbi,Xuping Sun
In this communication, we report on the solvothermal preparation of spinel ZnCo 2 O 4 /N-doped carbon nanotube (ZnCo 2 O 4 /NCNT) composite. As a novel oxygen reduction reaction (ORR) electrocatalyst , the ZnCo 2 O 4 /NCNT composite shows high activity via a four-electron pathway in alkaline solution. Such catalyst also exhibits superior methanol tolerance ability and durability over commercial Pt/C catalyst.
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ACS Nano
·
2025
·
IF 16
Yiqun Zhang,Yangyang Song,Sijian Lin,Xuyi Zhang,Zhuqing Wang,Xiaodong Wu
Natural skin receptors use ions as signal carriers, while most of the developed artificial tactile sensors utilize electrons as information carriers. To imitate the biological ionic sensing behavior, here, we present a kind of biomimetic, ionic, and fully passive mechanotransduction mechanism leveraging mechanical modulation of interfacial ionic p–n junction (IPNJ) through microchannels. Sensors based on this mechanism do not rely on an external power supply and can encode external tactile stimuli into highly analogous signal outputs to those of natural skin receptors, in terms of both signal type (i.e., ionic potential difference) and signal intensity (≈120 mV). More importantly, the instant interfacial IPNJ regulation characteristic endows the sensors with superior performance when compared to the state-of-the-art piezoionic sensors, including a low detection limit of 0.01 N, fast response/recovery speeds (16 ms/16 ms), ultralow power consumption (pW level), excellent reproducibility (over 100,000 cycles), and good capabilities to resolve both static and dynamic mechanical stimulations. As demonstrations, machine-learning-assisted high accuracy (over 99%) surface texture recognition and object classification are successfully demonstrated with the sensors integrated on robotic hands. This work enriches the family of mechanical sensing mechanisms and provides a path to mimicking natural tactile sensory systems for smart skins, artificial prostheses, and intelligent robots.
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EES Catalysis
·
2025
·
IF 8.1
Jie Yang,Lifang Chen,Xuya Zhu,Wenwen Shi,Mengxue Huang,Chang Liu,Ruimin Ding,Lin Gan,Xi Yin
H2O2 -related electrochemical reactions, including two-electron oxygen reduction reaction (2e-ORR), H2O2 oxidation reaction (HPOR), and H2O2 reduction reaction (HPRR), have received significant attention for the electrosynthesis H2O2 and energy storage. Understanding the complex structure-activity relationships among 2e-ORR/ HPOR/HPRR and their connections is crucial for further developing highly efficient catalysts and working systems. Herein, we unveil these intricacies by employing model Co-N-C catalysts with well-defined active site configuration (Co-N4-pyrrolic and Co-N4- pyridinic ) in a combined experimental and computational approach. We report the higher 2e-ORR/HPOR but lower HPRR activity of CoN4-pyrrolic site than the CoN4-pyridinic site based on their reaction free energy landscapes remodeled considering the chemisorption steps of O2 and H2O2 . The results reveal that the binding free energy of *OOH (ΔG*OOH ) can only be utilized as a reliable descriptor for 2e-ORR/HPOR activity, but not indicative of HPRR activity, regardless of the scaling relationship of the common reaction intermediates ( *OOH or *OH). The HPRR activity of CoN 4 sites strongly depends on the H2O2 adsorption strength and configuration. These findings provide valuable insights into the design of catalysts for H2O2 -related electrochemical energy conversion and storage systems.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Long Li,Chang Liu,Peiling Lin,Zhijie Gao,Yuhan Du,Pei-Gao Duan,Xingxing Jiao,Zhongxiao Song,Yangyang Liu,Shujiang Ding
Recently, significant progress has been made in the application of biomass in the field of supercapacitors, particularly in the development of high-performance electrode materials, which shows great potential and promise. Despite these advancements, the impact of specific surface area and pyrrolic nitrogen content on the final material performance remains inconclusive. The study underscores the pivotal role of nitrogen morphology in the nitrogen doping process, particularly highlighting the relationship between electrical properties and pyrrolic nitrogen content. Notably, when both the nitrogen doping content and the specific surface area increase concurrently, the electrical properties and pyrrolic nitrogen content exhibit a consistent “volcano-like” transition. Building on these insights, a porous nitrogen-containing carbon material, PCH-G-CR2, was synthesized. This material is characterized by a medium specific surface area, a high pyrrolic nitrogen content, and a rich microporous structure. In a three-electrode system, it demonstrates a specific capacitance of up to 551.25 F/g at a current density of 0.5 A/g. Moreover, its symmetrical device attained an energy density of 45.92 Wh/kg and a power density of 0.5 kW/kg. Notably, the capacity retention rate was 83.44% after 30,000 cycles at a high current density of 10 A/g. This study proposes an eco-friendly and efficient method for preparing biomass-based porous hydrothermal carbon materials suitable for high-performance supercapacitors.
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JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Jiakang Han,Zihao Qiu,Gerile Naren,Rui Meng,Zikang Hu
In recent years, rare earth complexes containing amino acids have attracted much attention in numerous fields, such as light, electricity, catalysis, biological activity, drugs, etc. The rare earth element terbium is considered an important fluorescent metal due to its special electronic structure. It has excellent photophysical properties, such as high color purity, large Stokes shift, long excited state lifetime, and profuse energy levels. It has been used in the fields of fluorescent probes, medical radiation, and chemical sensors. Considering their wide applications, a series of acyl amino acid terbium complexes were synthesized using N-acyl amino acids as ligands, and their structures and photophysical properties were studied. The analysis of the theoretical and experimental results demonstrates that the energy transfer efficiency from ligands to the terbium ion emission levels increases with increasing alkyl carbon chain length, leading to differences in the luminescent intensity of the complexes. The energy transfer efficiency from ligands to rare earth ions was the result of a combination of the relative positions between the resonance energy levels of the central rare earth ion and the lowest triplet state energies of ligands as well as the intersystem crossing probability of the ligands. Moreover, the density functional theory (DFT) was used to determine the geometric structures and obtain 1 H NMR and FT-IR spectra of the terbium complexes. Their structures were further examined by comparing the calculated with the experimental spectra. The results show that the ligands coordinate to the central Tb 3+ through the bidentate chelation mode and that the theoretically determined structure was reliable.
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AICHE JOURNAL
·
2024
·Vol. 70
·期 9
·e18492
·
IF 3.5
Yanli Zhang,Mengjin Zhou,Yangyang Wang,Zhaoyou Zhu,Yinglong Wang,Peizhe Cui,Jianguang Qi,Jingwei Yang,Fang Wang
Biobutanol is a green solvent commonly used as gasoline additive. In this study, it is proposed the separation of azeotropic mixtures of butanol and n-butyl ether (DBE) using ionic liquids (ILs). Suitable anions [AC] − and [H 2 PO 4 ] − were screened by COSMO-RS, and the effect of carbon chain length on the separation effect was investigated using quantum chemical calculations. It was found that the anion was primarily responsible for the separation effect, which grew as the carbon chain grew. Molecular dynamics simulations were used to verify the separation performance of the selected ILs. The separation effect of ILs was further verified using vapor–liquid phase equilibrium (VLE) experiments. The extractive distillation process with [PrMIM][AC] as the extractant was investigated to demonstrate the feasibility of ILs for the separation of butanol and DBE. This study analyzes the whole process from microscopic mechanism of action, which provides new ideas for the separation of alcohol-ether systems.
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JOURNAL OF PROTEOME RESEARCH
·
2024
·
IF 3.8
Huohuan Tian,Ze Tao,Wanli Zhang,Yuzhe Chen,Tao Su,Xinyuan Wang,Hao Yang,Hao Cai,Shuyun Liu,Yi Zhang,Yong Zhang
Human plasma proteomic and glycoproteomic analyses have emerged as an alternate avenue to identify disease biomarkers and therapeutic approaches. However, the vast number of high-abundance proteins in plasma can cause mass spectrometry (MS) suppression, which makes it challenging to detect low-abundance proteins (LAP). Currently, immunoaffinity-based depletion methods and strategies involving nanomaterial protein coronas have been developed to remove high-abundance proteins (HAP) and enhance the depth of plasma protein identification. Despite these advancements, there is a lack of systematic comparison and evaluation of the qualitative and quantitative effects of different strategies on the human plasma proteome and glycoproteome. In this study, we evaluated the performance of four depletion methods including combinatorial peptide ligand libraries (CPLL), Top 2, Top 14, and the nanomaterial protein corona formed by magnetic nanoparticles (MN) in both plasma proteomics and N-glycoproteomics. Compared to the CPLL, Top 2, and Top 14 strategies, the MN approach significantly increased the number of identified peptides and proteins. However, it demonstrated a relatively lower efficacy in identifying intact N-glycopeptides and N-glycoproteins. In contrast, the immunoaffinity-based depletion methods are better suited to glycoproteomics due to higher identification numbers. We believe that this work provides valuable insights and options for various research objectives, as well as clinical applications.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Yujie Gao,Xiangyu Dang,Ahai Zhu,Zhize Chen
Hydrogels exhibiting excellent biocompatibility and resistance to foreign body response (FBR) hold significant promise in the biomedical field. In this study, we developed a photopolymerized hydrogel named poly(3,3′-((2-(2-((3-methacrylamidopropyl)amino)-2-oxoethyl)-4-((3-methacrylamidopropyl)carbamoyl)-2,4-dimethylhexanedioyl)bis(azanediyl))bis(N,N-dimethylpropan-1-amine oxide))(PIAPMANOX), whose prepolymer is based on poly(itaconic acid)(PIA) and is grafted with varying ratios of zwitterionic trimethylamine N-oxide (TMAO) derivatives and N-(3-aminopropyl)methacrylamide hydrochloride (APMA). The TMAO derivatives possess the ability to form a compact hydration layer due to their distinctive properties─namely, the minimal spacing between zwitterionic groups, the robust hydrogen bonding interactions, the smallest net charge, and the lowest dipole moment. These characteristics collectively promote the establishment of a tightly packed hydration shell that effectively inhibits nonspecific adsorption of substances such as proteins and cells. Meanwhile, APMA contributes a carbon–carbon double bond that promotes photoinitiated radical polymerization for constructing a three-dimensional hydrogel network. Among the various materials studied, the hydrogel PIAPMANOX, which incorporates the zwitterionic TMAO, demonstrates exceptional performance in terms of protein and cell rejection. The hydrogel was implanted into the peritoneal cavity of mice. Experimental results demonstrated that this hydrogel significantly reduced FBR, with no notable inflammatory reaction observed and a decrease in fibrosis. Therefore, the PIAPMANOX series introduces innovative nontoxic zwitterionic materials to the field of biomaterials.
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CHIRALITY
·
2024
·Vol. 36
·期 2
·e23643
·
IF 2.8
Xiaojun Li,Qi Li,Liying Yang,Liqin Huang,Chenchen Peng,Jianyong Zheng
In this study, lipase-catalyzed resolution of N-acetyl-DL-methionine methyl ester (N-Ac-DL-MetOMe) was evaluated. A lipase from Brucella thiophenivorans was prone to exhibit high activity and excellent enantioselectivity toward N-Ac-DL-MetOMe to produce the key chiral intermediate N-acetyl-L-methionine methyl ester (N-Ac-L-MetOMe). The results showed that the enzymatic reaction was carried out in 100 g/L racemic substrate for 2 h, the conversion reached 51.3%, the enantiomeric excess value N-Ac-L-MetOMe exceeded 99%, and the enantiomeric ratio value >200. Therefore, the lipase from B. thiophenivorans has potential prospects for the resolution of N-Ac-DL-MetOMe to produce the important intermediate N-Ac-L-MetOMe.
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Materials
·
2025
·Vol. 18
·期 7
·1614
·
IF 3.2
Zhishu Chen,Chao Zhang
Poly(N-isopropylacrylamide) (PNIPAm) undergoes a sharp phase transition in aqueous solutions at around 32 °C, which is called the lower critical solution temperature; the tuning of the LCST of PNIPAm could be achieved by the copolymerization ofN-isopropylacrylamide (NIPAm) with other hydrophilic/hydrophobic monomers to regulate the solvation state of PNIPAm and meet the requirements of possible applications. Herein, a hydrophilic monomer, 2,3-dihydroxypropyl methacrylate (DHPMA), w introduced to regulate the phase transition behavior of PNIPAm via free radical copolymerization. A series of poly(N-isopropylacrylamide-co-2,3-dihydroxypropyl methacrylate) (P(NIPAm-co-DHPMA)) was synthesized and characterized. The reaction kinetics were investigated in detail. In this copolymerization, the reactivity ratios of DHPMA and NIPAm were found to be 3.09 and 0.11, suggesting that DHPMA had greater preference for homopolymerization than for copolymerization, while NIPAm had greater preference for copolymerization than for homopolymerization. The phase transition temperature of P(NIPAm-co-DHPMA) copolymers varied from 31 to 42 °C by controlling the content of DHPMA in the copolymers from 0 to 58 mol%. Finally, the good cytocompatibility of P(NIPAm-co-DHPMA) was confirmed. These results provide insights into designing thermo-responsive polymers with suitable responsive behaviors that meet the requirements of different applications.
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