APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Yinghao Guo,Aiqing Cao,Lin Zhang,Marshet Getaye Sendeku,Yaping Li,Yun Kuang,Fengmei Wang,Xiaoming Sun
The chlorine evolution reaction is an anodic reaction in the chlor-alkali process, which utilizes dimensionally stable anodes (DSA) with large amounts of noble metals like iridium. Cheaper chlorine evolution anodes with high selectivity and stability are highly appealing but challenging. Here, a polymetallic oxide consisting of Sn, Ru, Nb, and Ti elements is synthesized on Ti felt for catalyzing chlorine evolution reaction. In particular, the Ru 0.3 Sn 0.6 Nb 0.1 O 2 film on Ti felt (i.e., Ru 0.3 Sn 0.6 Nb 0.1 O 2 /Ti) demonstrates a low overpotential of 42 mV at 10 mA cm −2 in 5 M NaCl (pH= 2) along with high Cl 2 selectivity (96.0 %) and mass activity (54.2 A g Ru −1 ) at 1.41 V versus reversible hydrogen electrode, which is 16 times higher than that of DSA electrode (3.2 A g Ru+Ir −1 ). Significantly, this anode can stably work for > 500 h at a current density of 100 mA cm −2 without attenuation. The flow cell fabricated with the Ru 0.3 Sn 0.6 Nb 0.1 O 2 /Ti anode and Pt/C cathode possesses excellent stability with a Cl 2 selectivity of 93 %, surpassing the flow cell fabricated with the DSA anode (81 %). The Ru 0.3 Sn 0.6 Nb 0.1 O 2 /Ti electrode exhibits low noble metal costs (7 % of DSA), and lower energy cost (82.5 % of DSA), but similar durability, showing great potential for industrial application.
研究领域:
材料科学
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化学工程
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·227
·
IF 36.3
Li Na,Cheng Weiren,Liu Yuying,Liu Ruiqi,Feng Sihua,Wang Huijuan,Lv Liyang,Liu Chenglong,Ma Jin,Wang Chao,Yan Wensheng
Monodisperse and substitute Co were doped into edge-sharing [IrO 6 ] octahedra of Ca 2 IrO 4 model catalyst, which usually present the intrinsic and strong stability for acid oxygen evolution reaction (OER)
The optimized Janus Co–Ir local structure triggers spin balance effect with optimal e g 1 orbital and uneven t 2g orbital despite the large crystal field of Ir, which co-promote the OER activity with a relatively stable crystal structure.
Different from the slowly kinetics of adsorbates evolution mechanism on Ca 2 IrO 4 , superoxide path mechanism occurs on Co doped Ca 2 IrO 4 based on the assignment of *OO on dual active sites of Ir and Co.
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INFRARED PHYSICS & TECHNOLOGY
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2017
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IF 1.713
De-yue Ma,Xiao-xia Li,Yu-xiang Guo,Yu-run Zeng
The complex refractive index of reduced graphene oxide and CuFe 2 O 4 composites prepared by hydrothermal method was calculated using infrared Micro-reflective spectra and K-K relation, and the calculation errors were analyzed according to its IR transmission and spectral reflectivity calculated by Fresnel formula. And then normal emissivity of the composite in IR atmospheric window was calculated by means of Fresnel formula and modified refraction angle formula. The calculation accuracy was verified by comparing measured normal total emissivity with the calculated one. The results show that complex refractive index and normal emissivity calculated by the formulas have a high accuracy. It has been found that the composite has a good absorption and radiation characteristics in IR atmospheric window and a strong scattering ability in middle IR region by analyzing its extinction, absorption and radiation properties in IR region. Therefore, it may be used as IR absorption, extinction and radiation materials in some special fields.
研究领域:
材料科学
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光学
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红外物理
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纳米复合材料
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热辐射
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ORGANIC PROCESS RESEARCH & DEVELOPMENT
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2026
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IF 3.3
Yifan Yang,Zhangbin Guan,Ran Wang,Wenqing Wang,Meihui Zhang,Xiaoye Su,Yu Shao
The solid-phase synthesis is a critical step in the oligonucleotide manufacturing process, and the detritylation reaction, as an essential procedure in oligonucleotide synthesis, directly affects the purity and yield of the drug substance. However, classical in-line ultraviolet (UV) monitoring techniques suffer from issues such as a narrow signal response range, delayed monitoring, and inadequate monitoring of microreaction processes. Therefore, this study optimizes the detritylation process in oligonucleotide synthesis using in-line infrared (IR) spectroscopy. The experimental results show that under the solid-phase synthesis conditions of oligonucleotides with different lengths and sequences, the in-line IR technology can real-time and accurately reflect the kinetic changes of the dichloroacetic acid monomer (DCA-monomer, IR 1765 cm–1) and dimer (DCA-dimer, IR 1740 cm–1), acetonitrile (IR 2253 cm–1), and toluene (IR 1495 cm–1) during the detritylation process. Compared with the classical UV monitoring techniques, the in-line IR technology reduced the consumption of the detritylation reagent by about 30%, while ensuring that the overall purity and quality of depurination impurities remained unchanged. This technological advance has greatly promoted the industrial application of solid-phase synthesis in green chemistry and provides a universal platform strategy for the future process development of a variety of oligonucleotide drugs.
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INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION
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2013
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IF 1.233
Shunping Wang,Xiaodeng Yang,Qingquan Bai,Tianduo Li
A number of tertiary amines and organotin catalysts for the phenyl isocyanate- 1,2-propylene glycol reaction were investigated by using in situ FT-IR. The reaction rate of each hydroxyl group, which is defined as the ratio between the rate constant of the secondary hydroxyl group and the rate constant of the primary hydroxyl group, is described with a second-order equation. The influence of different catalyst concentrations as well as the reaction temperature is discussed. It is observed that the selectivity depends on temperature but not on concentration, and stannous octoate is the most effective catalyst. The thermodynamic parameters were determined for the catalyzed reactions, primary and secondary hydroxyl groups being differentiated.
研究领域:
化学工程
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材料科学
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催化化学
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Benyong Yang,Wentao Mu,Benedict Tsz Woon Lo,Sijie Liu,Zhihang Chen,Liam John France,Xuehui Li
NOx and CO formation is, at present, a consequence arising from fuel production, but their emission need not be. In this study, a series of novel Ir-containing TiO2-nanobelt catalysts were designed and prepared for the simultaneous removal of NOx and CO. Activity data demonstrates that the TiO2(B) support promotes NO reduction compared to anatase. Furthermore, reaction efficiency (RE), a measure of NOx consumption vis-à-vis that of CO, reveals that catalysts containing anatase promote CO oxidation more so than their TiO2(B) counterparts. Increasing Ir concentration over the latter promotes low-temperature catalytic performance, an effect believed to be linked to the formation of Ir0–IrO2 composites. In situ DRIFTS experiments reveal the relevance of nitrite/nitrate formation and consumption at 250 °C, a mechanism insinuated by the RE value. However, at 300 °C, both TOF and RE increase, signifying the participation of a faster and more-selective reaction, which appears consistent with the isocyanate-mediated pathway.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
·
IF 8.2
Yinan Li,Jun Wang,Jiajia Guo,Chenglong Fu,Liulian Huang,Lihui Chen,Yonghao Ni,Qinghong Zheng
Actuators are widely used in bionic devices and soft robots, among which invisible actuators have some unique applications, including performing secret missions. In this paper, highly visible transparent cellulose-based UV-absorbing films were prepared by dissolving cellulose raw materials using N -methylmorpholine-N-oxide (NMMO) and using ZnO nanoparticles as UV absorbers. Furthermore, transparent actuator was fabricated by growing highly transparent and hydrophobic polytetrafluoroethylene (PTFE) film on regenerated cellulose (RC)-ZnO composite film. In addition to its sensitive response to Infrared (IR) light, the as-prepared actuator also shows a highly sensitive response to UV light, which is attributed to the strong absorption of UV light by ZnO NPs. Thanks to the drastic differences in adsorption capacity between the RC-ZnO and PTFE materials for water molecules, the asymmetrically- assembled actuator demonstrates extremely high sensitivity and excellent actuation performance, with a force density of 60.5, a maximum bending curvature of 3.0 cm −1 , and a response time of below 8 s. Bionic bug, smart door and the arm of excavator made from the actuator all exhibit sensitive responses to UV and IR lights.
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ChemPlusChem
·
2023
·Vol. 88
·期 6
·e202300138
·
IF 3.4
Hongyu Guo,Jiaqiao Yang,Jian Zeng,Xiaoqi Yu,Shanshan Yu,Lin Pu
Graphical The first near IR fluorescent probe for the chemoselective and enantioselective recognition of arginine in aqueous solution is reported in this work. This probe also allows visual discrimination of the arginine enantiomers because of its fast and distinct color change upon interaction with the substrate. The first near IR fluorescent probe for the chemoselective and enantioselective recognition of arginine in aqueous solution is reported in this work. This probe, made of a 1,1’-binaphthyl-based chiral aldehyde unit and a rhodamine-based near IR chromophore, in combination with La 3+ exhibits highly chemoselective as well as enantioselective fluorescent enhancement with arginine at λ=764 nm upon excitation at λ=690 nm. Little or no fluorescent response is observed toward the chirality miss-matched arginine enantiomer or other common amino acids and their enantiomers. This probe also allows visual discrimination of the arginine enantiomers because of its fast and distinct color change upon interaction with the substrate.
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ACS Applied Materials & Interfaces
·
2023
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IF 9.5
Baoxuan Huang,Chen Zhang,Jia Tian,Qiwei Tian,Gang Huang,Weian Zhang
The long-standing misuse of antibiotics has accelerated the emergence of drug-resistant bacteria, which gives rise to an urgent public health threat. Antibacterial photodynamic therapy (aPDT), as a burgeoning and promising antibacterial strategy, plays an essential role in avoiding the evolution of drug-resistant microbes. However, it is hard for conventional photosensitizers to achieve satisfactory antibacterial efficacy because of the complex bacterial infectious microenvironment (BIME). Herein, a cascade BIME-triggered near-infrared cyanine (HA-CY) nanoplatform has been developed via conjugating cyanine units to biocompatible hyaluronic acid (HA) for enhanced aPDT efficacy. The HA-CY nanoparticles can be dissociated under the overexpressed hyaluronidase in BIME to release a cyanine photosensitizer. Meanwhile, cyanine can be protonated under acidic BIME, where protonated cyanine can efficiently adhere to the surface of a negatively charged bacterial membrane and increase singlet oxygen production due to intramolecular charge transfer (ICT). Experiments in the cellular level and animal model proved that the BIME-triggered activation of aPDT could remarkably boost aPDT efficacy. Overall, this BIME-triggered HA-CY nanoplatform presents great promise for overcoming the dilemma of drug-resistant microbes.
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BIOINORGANIC CHEMISTRY AND APPLICATIONS
·
2023
·
IF 3.8
Jingfang Song,Jian He,Lin Yang,Weiguo Wang,Qinqin Bai,Wei Feng,Ranhui Li
To inhibit the growth of bacteria, the DA-PPI nanozyme with enhanced peroxidase-like activity was synthesized. The DA-PPI nanozyme was obtained by depositing high-affinity element iridium (Ir) on the surface of Pd-Pt dendritic structures. The morphology and composition of DA-PPI nanozyme were characterized using SEM, TEM, and XPS. The kinetic results showed that the DA-PPI nanozyme possessed a higher peroxidase-like activity than that of Pd-Pt dendritic structures. The PL, ESR, and DFT were employed to explain the high peroxidase activity. As a proof of concept, the DA-PPI nanozyme could effectively inhibit E. coli (G−) and S. aureus (G+) due to its high peroxidase-like activity. The study provides a new idea for the design of high active nanozymes and their application in the field of antibacterial.
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CATALYSIS TODAY
·
2022
·
IF 6.562
Hui Li,Hehe Wei,Longtao Zhang,Zixiang Su,Xueqing Gong
Highly active and durable noble metal-based catalysts for electrochemical hydrogen evolution are crucial for clean and renewable energy production, however, low abundance and high price hinder their development at industrial scale. Herein, we synthesized carbon-supported ultrafine iridium nanoparticles (Ir NPs/C) catalyst via solvothermal method which achieved ultralow overpotentials of 13 and 57 mV at the current density of 10 and 100 mA cm −2 for hydrogen evolution reaction (HER) in acidic media, respectively. The prepared Ir NPs/C catalyst also exhibited ultrahigh mass activity of 44.5 A mg −1 at the overpotential of 40 mV and outstanding long-term stability in HER performance for 12 h, remarkably superior to state-of-the-art commercial Pt/C catalyst (3.3 A mg −1 , fast decay) and commercial Ir/C catalyst (1.2 A mg −1 ). Furthermore, it possessed activities toward oxygen evolution reaction (OER) and overall water splitting. This work demonstrates evenly dispersed fine Ir NPs/C catalyst can facilitate highly efficient HER and provides inspiration for rational design of advanced electrocatalysts.
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SmartMat
·
2023
·
IF 20.4
Yushan Yang,Kaicong Chen,Yipeng Chen,Chao Wang,Baokang Dang,Yingying Li,Ming Liu,Qingfeng Sun
Combination of flexible multifunctional stealth technology properties such as electromagnetic (EM) and infrared (IR) stealth is crucial to the development of aerospace, military, and electronic fields, but the synthesis technology still has a significant challenge. Herein, we have successfully designed and synthesized highly flexible MXene@cellulose lamellae/borate ion (MXCB) sheets with strong high-temperature EM-IR bi-stealth through sequential bridging of hydrogen and covalent bonds. The resultant MXCB sheets display high conductivity and good mechanical features such as flexibility, stretchability, fatigue resistance, and ultrasonic damage. MXCB sheets have a high tensile strength of 795 MPa. Furthermore, MXCB sheets with different thicknesses indicate exceptional high-temperature thermal-camouflage characteristics. This reduces the radiation temperature of the target object (>300°C) to 100°C. The conductivity of MXCB sheet with 3 μm thickness is 6108 S/cm and the EM interference (EMI) shielding value is 39.74 dB. The normalized surface-specific EMI SE absolute shielding effectiveness (SSE/ t ) is as high as 39312.78 dB·cm 2 /g, which remained 99.39% even after 10,000 times repeated folding. These multifunctional ultrathin MXCB sheets can be arranged by vacuum-assisted induction to develop EM-IR bi-stealth sheet.
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