CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ling Zhong,Yimeng Yan,Zhixuan Ye,Xinxiang Zhang,Wenbin Yang,Jiaxian Zheng,Xiangfeng Lin,Linxin Zhang,Ge Zhou,Huiping Lin,Zhanhui Yuan
Despite their high energy density, cost-effectiveness and operational security , aqueous zinc-ion batteries (AZIBs) are hindered from commercialization by two critical anode issues: Zn dendrite growth and the hydrogen evolution reaction (HER). This work fabricates a superhydrophobic COF/Nafion coating for stabling the Zn anode of the AZIBs by drop-casting COF/Nafion solution containing the Py-DMTP covalent organic framework (COF) onto the surface of the Zn anode, regulating the Zn deposition behavior at the anode for suppressing dendrite growth and HER. The superhydrophobic COF/Nafion coating on the Zn anode (Zn@COF/Nafion) markedly lowers the nucleation overpotential, facilitating the transition of Zn 2+ diffusion from a 2D model to a 3D one during Zn deposition, thus mitigating concentration polarization and enabling uniform Zn plating. Furthermore, the zincophilic functional groups (-NH 2 in COF and -SO 3 H in Nafion) enhance the desolvation of [Zn(H 2 O) 6 ] 2+ in the electrolyte, effectively suppressing side reactions such as HER. Consequently, batteries equipped with the Zn@COF/Nafion anode exhibit superior electrochemical performance. Zn@COF/Nafion||Zn cell maintains stable cycling over 420 h at 5 mA cm −2 and 5 mAh cm −2 , representing a sixfold enhancement over bare Zn anode. The Zn@COF/Nafion||NVO full cell maintains a capacity and retention rate of 165.71 mAh g −1 and 57.22 % after 1000 cycles at 5 A g −1 , markedly superiors to those of Zn||NVO cell (56.53 mAh g −1 and 20.25 %). The protection of the anode by the superhydrophobic COF/Nafion coating can significantly enhance the cycling stability of AZIBs, offering a novel strategy for optimizing the anode-electrolyte interface of AZIBs.
研究领域:
材料科学
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电化学
·
储能
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH INNOVATIONS
·
2025
·
IF 0
Mengyuan Zhao,Tingting Wu,Jiale Han,Nan Hu,Hongyuan Zhao
We developed a facile and easy-to-use preparation technique to fabricate peanut shell-derived porous carbon (PSPC) with highly electroactive area and interconnected porous carbon structure. The introduction of zirconium dioxide (ZrO2) nanoparticles into the microporous structure of PSPC results in the formation of PSPC@ZrO2 composite, which was used as electrode sensitiser in the presence of Nafion membrane to modify the surface of glass carbon electrode (GCE) to successfully prepare the PSPC/ZrO2/Nafion/GCE sensor. PSPC has excellent conductivity and abundant electroactive region, which effectively facilitates electron transfer between the sensing interface and electrolyte. The biocompatible ZrO2 recognise the phosphate group of methyl parathion (MP), which enables the effective enrichment of MP. Meanwhile, the presence of Nafion enhanced the stability of the sensing electrode surface. The PSPC/ZrO2/Nafion/GCE sensor achieves highly sensitive detection of MP in the linear range of 0.05–10 μM (Limit of detection: 15.7 nM). The prepared sensor has favourable practicality for MP detection in real samples.
研究领域:
环境科学
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材料科学
·
分析化学
✓ 已验证
产品关联
DOI
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Tianzi Bi,Yuxuan Wei,Jiabin You,Guiru Zhang,Yongjian Su,Xiaojing Cheng,Xiaohui Yan,Huiyuan Li,Shuiyun Shen,Junliang Zhang
Cobalt phthalocyanine (CoPc) is a widely utilized molecular catalyst for converting CO2 to CO in the CO2 reduction reaction (CO2RR). However, achieving high selectivity at high current densities remains significant challenges, such as mass transport and interfacial microenvironment. In this study, CoPc-based gas diffusion electrodes with thermal induction treatments are investigated to reach high performance and stability. At a current density of 300 mA/cm2, the cell voltage is 2.9 V, with a CO selectivity of 95%, representing nearly a 5-fold improvement compared to the pristine electrode. Additionally, at a current density of 150 mA/cm2, the electrode demonstrates long-term durability, maintaining stable performance for 45 h. The structural changes and underlying mechanisms of the Nafion ionomer induced by thermal treatment are investigated via microscopic characterization and molecular dynamics simulations. It is revealed that thermal induction at temperatures slightly above Nafion’s glass transition point could enhance ionomer phase separation, resulting in the formation of additional hydrophilic–hydrophobic interfaces that facilitate CO2 mass transport. Moreover, the rearrangement of Nafion chains during thermal induction produces a denser structure that restricts OH– release. This localized retention of OH– raises the pH near the catalyst, thereby improving the efficiency of the CO2RR. This work offers valuable insights into the design of CoPc-based gas diffusion electrodes with high selectivity at elevated current densities and provides guidance for post-treatment processes in the field of CO2RR.
研究领域:
电化学
·
二氧化碳利用
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材料科学
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催化
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能量转换
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL SCIENCES
·
2012
·Vol. 28
·期 5
·497-502
·
IF 1.255
Li Yamin,Wu Shufang,Luo Peili,Liu Jie,Song Ge,Zhang Kai,Ye Baoxian
An ultrasensitive voltammetric sensor, a simply coated graphene-Nafion suspension on a glass carbon electrode surface, was fabricated and used to investigate the electrochemical behavior of theophylline as described in the present paper. The results indicated that this voltammetric sensor exhibited a special recognition capacity to determine theophylline as well as having high sensitivity due to the excellent characteristics of graphene and the adsorption action of Nafion for theophylline. Under the selected condition using differential pulse voltammetry, the response peak currents had a linear relationship with the theophylline concentrations in two ranges from 1.0 × 10 –8 – 1.0 × 10 –6 and 2.0 × 10 –6 – 3.0 × 10 –5 mol L –1 with a low detection limit of 6.0 × 10 –9 mol L –1 . Moreover, according to the results obtained in the analysis of theophylline in two standard samples, it demonstrated the applicability of present method into real sample determination.
研究领域:
分析化学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Guoxiao Xu,Shiji Xue,Zenglv Wei,Jing Li,Konggang Qu,Ying Li,Weiwei Cai
With PWA as proton transfer and silica as water retainer, stable phosphotungstic acid/silica/Nafion (PWA/Si–N) composite membrane is non-destructively fabricated and exhibits excellent stability and high temperature proton conductivity . Compared with pristine Nafion , high temperature proton conductivity is significantly enhanced due to the collaboration between –SO 3 H ionic clusters and the in -situ filled silica embedded PWA nanoparticles . PWA is stabilized in the ionic clusters via in-situ catalyzing the hydrolysis silica precursor targeted filled into the –SO 3 H ionic clusters. Stable proton conductivity of the PWA/Si–N membrane at 110 °C and 60% RH is high to 0.058 S/cm, which is 2.4 folds of that of Nafion. At the same time, the composite membrane still maintains good mechanical and thermal stability. As a result, high temperature fuel cell performance of the composite membrane is improved by 41% compared with the pristine Nafion membrane . The in -situ coating method proved to be an effective method to solve the stability of PWA in Nafion membrane, especially the inorganic oxide with good hygroscopicity as the modifier.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Dezhu Zhang,Li Xin,Yongsheng Xia,Liheng Dai,Kai Qu,Kang Huang,Yiqun Fan,Zhi Xu
The development of high-performance ion exchange membranes to break the trade-off between ion selectivity and conductivity is always a great challenge for the vanadium redox flow battery (VRFB). Herein, a hybrid membrane was successfully prepared via the solution casting method. The UiO-66-SO 3 H was embedded in Nafion matrix, acting as an effective barrier for vanadium ions to realize enhanced ion selectivity. At the same time, besides the intrinsic proton cluster channels in Nafion, two types of additional proton transport channels formed in the membranes, which further improved the conductivity of the membranes. Consequently, the VRFB with an optimized hybrid membrane exhibited enhanced voltage efficiency (VEs: 91.5-78.4%) and outstanding energy efficiency (EEs: 86.0-76.1%) compared with the one with recasting Nafion membrane (rNf) (VEs: 86.9-69.0%, EEs: 80.3-66.0%) at 80–220 mA cm -2 . The efficiency kept stable for 1000 cycles in the long-term cycling tests, and the discharge capacity decay rate of the VRFB with the hybrid membrane is only 0.13% per cycle, which is in obvious contrast to the one with rNf (0.73% per cycle). In addition, the electrolyte utilization rate of the VRFB assembled with the hybrid membrane was much higher than that of the one with rNf.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Wanqing Zhang,Guangri Xu,Runqiang Liu,Jun Chen,Xiaobo Li,Yadong Zhang,Yuping Zhang
A sensitive and selective sensor was fabricated to determine melamine (Mel), based on MIL-53@XC-72 nanohybrid modified glassy carbon electrode (GCE). The MIL-53@XC-72 nanohybrid was synthesized from MIL-53 via hydrothermal method, followed by adulterating with XC-72. The prepared sensor possessed high sensitivity and selectivity due to the synergistic effect of the large surface of MIL-53, the bonding interaction between Mel and MIL-53 as well as the high conductivity of XC-72. Under the optimal conditions, the sensor exhibited rapid electrochemical response to Mel at the potential of 0.7 V in 0.1 M HCl solution. A linear concentration range of Mel was obtained from 0.04 to 10 μM with a linear correlation coefficient of 0.998 and detection limit of 0.005 μM (S/N = 3). In addition, the sensor presented excellent reproducibility, high stability and selectivity, and was successfully applied for the determination of Mel in liquid milk with a good recoveries. Hence, the MOFs@XC-72-Nafion-GCE sensor could be considered as promising applicability for the determination of other electrochemically inactive analytes.
研究领域:
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
RADIATION PHYSICS AND CHEMISTRY
·
2022
·
IF 2.776
Yu Cui,Yang Hu,Yicheng Wang,Yue Wang,Jing Peng,Jiuqiang Li,Maolin Zhai
Tertiary amino-modified graphene oxide (GO) nanosheet (named as TAGO) was successfully synthesized by gamma-ray radiation-induced grafting of dimethylaminoethyl methacrylate onto the surface of GO. Then, a novel Nafion-TAGO composite membrane was prepared by solution casting method and TAGO could be dispersed uniformly in the Nafion due to a good compatibility with the Nafion matrix. In the composite membrane, acid-base pairs were formed through hydrogen-bond network among the tertiary amino groups, the carboxylic acid groups and hydroxyl groups in TAGO and/or sulfonic acid groups in Nafion, respectively. Owing to the acid-base pair interactions (such as –SO 3 H … -N(CH 3 ) 2 ), the ionic channels for proton transport could be provided in the composite membrane. As a result, the Nafion-TAGO composite membrane exhibited excellent thermal stability, high proton conductivity, low VO 2+ permeability and high ion selectivity . Therefore, the TAGO is a good candidate for the performance improvement of Nafion used in vanadium redox flow battery.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Shubo Wang,Guohan Yan,Xiaowen Kang,Zhenhuan Li,Xupin Zhuang
A membrane with a low methanol permeability and high proton conductivity ( σ p ) is essential for the effective operation of a direct methanol-based fuel cell. Herein, a bio-metal organic framework was prepared with natural α-amino acids as ligands and then combined with hydrolyzed polyacrylonitrile (PAN) nanofibers (AA-MOF@PAN). The resulting nanocomposite membranes were subsequently integrated into a Nafion matrix (AA-MOF@PAN/Nafion). The –NH 2 groups on AA-MOF@PAN interact with –SO 3 H groups on Nafion, forming long-range acid-base pairs along the interface between the matrix and nanofibers. This interaction creates abundant proton-conducting sites for proton exchange membrane. Notably, the AA-MOF@PAN-4h/Nafion membrane demonstrated an exceptional proton conductivity (σ p ) of 0.25 S cm −1 and a higher power density of 117.61 mW cm −2 compared to the recast Nafion membrane. This study offers valuable insights into the three-dimensional ordered design of a natural α-amino acids as a proton transfer sites and highlighting their potential applications in proton exchange membranes.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Yushen Xiao,Junchen Wang,Tongxin Tang,Kai-Hang Ye,Jieyu Li,Shuilian Cheng,Wenhao Zou,Junwei Chen,Xiaoxin Chen,Haoxian Shao,Hengjun Xie,Shengsen Zhang,Yueping Fang,Changyu Liu,Songcan Wang,Shanqing Zhang
Traditional photoelectrochemical (PEC) water splitting generally involves the kinetically sluggish oxygen evolution reaction, which not only restricts the hydrogen evolution reaction but also yields oxygen with little economic value. Herein, a Nafion/TiO 2-x photoanode is designed for coupling the PEC glucose oxidation reaction (GOR) with hydrogen production. Benefiting from charge migration between the Nafion layer and TiO 2-x , this approach effectively suppresses non-radiative recombination caused by vacancy-related surface traps. It also induces band bending, thereby enhancing the directional separation of photo-generated charges. Compared to pristine TiO 2 , this photoanode exhibits a fivefold increase in photocurrent density, outstanding long-term stability, and an absorbed photon-to-current conversion efficiency of 100%. Furthermore, the glucose oxidation efficiency reaches 97.8%, with a Faradaic efficiency of 80% for the selective oxidation of glucose to the high-value-added product of glucaric acid. Concurrently, the Faradaic efficiency for hydrogen evolution at the cathode is 99%, enabling simultaneous high-value organic synthesis and hydrogen co-production. Moreover, the Nafion/TiO 2-x photoanode demonstrates ultra-low detection limits and linear response at ultra-low concentrations for photoelectrochemical sensing. This research offers novel insights for synergistically optimising biomass resource utilisation and clean energy production.
✓ 已验证
DOI
高影响因子
SENSORS
·
2025
·Vol. 25
·期 9
·2655
·
IF 3.5
Zhengying Guo,Peng Xu,Shiqing Zhou,Ruoxi Wu
Excessive levels of heavy metal pollutants in the environment pose significant threats to human health and ecosystem stability. Consequently, the accurate and rapid detection of heavy metal ions is critically important. A AgNPs@CeO2/Nafion composite was prepared by dispersing nano-ceria (CeO2) in a Nafion solution and incorporating silver nanoparticles (AgNPs). The morphology, microstructure, and electrochemical properties of the modified electrode materials were systematically characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and cyclic voltammetry (CV). By leveraging the oxygen vacancies and high electron transfer efficiency of CeO2, the strong adsorption capacity of Nafion, and the superior conductivity of AgNPs, an AgNPs@CeO2/Nafion/GCE electrochemical sensor was developed. Under optimized conditions, trace Pb2+in water was detected using square wave anodic stripping voltammetry (SWASV). The sensor demonstrated a linear response for Pb2+within the concentration range of 1–100 μg·L−1, with a detection limit of 0.17 μg·L−1(S/N = 3). When applied to real water samples, the method achieved recovery rates between 93.7% and 110.3%, validating its reliability and practical applicability.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2014
·
IF 5.211
Yuning Zhao,Hao Yang,Hong Wu,Zhongyi Jiang
Mesoporous silica submicrospheres with –NH 2 groups or –PO 3 H 2 groups on the outer surface, and –PO 3 H 2 groups on the inner pore walls are prepared and designated as N–P–SiO 2 and P–P–SiO 2 , respectively. Both kinds of silica submicrospheres are introduced into Nafion membrane matrix to fabricate hybrid membranes . The water uptake, membrane swelling properties, and proton conductivities at different temperatures and different relative humidities of the hybrid membranes are characterized. Proton conducting performances of the hybrid membranes are all enhanced compared to that of the pristine Nafion membrane, and the highest proton conductivity is 0.339 S cm −1 (115 °C, 100% RH). At 100% RH, Nafion/N–P–SiO 2 membranes exhibit higher proton conductivities than the Nafion/P–P–SiO 2 counterparts; while at low humidities, the proton conductivities of the Nafion/P–P–SiO 2 membranes are enhanced more pronouncedly than those of the Nafion/N–P–SiO 2 counterparts. The different increasing tendencies of the proton conducting performance could be attributed to the varied synergistic effects between the proton conducting groups introduced by the mesoporous silica and the groups anchored on the membrane matrix.
研究领域:
材料科学
·
化学工程
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）