JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 10
·100528
·
IF 4.316
Zhanwei Xu,Hao Yan,Kai Yao,Kang Li,Jiayin Li,Keren Jiang,Zhi Li
Efficient catalysts for the reduction reaction of SOCl2 are desired for lithium/thionyl chloride batteries with high and stable voltage. In this work, iron phthalocyanine particulates fixed on activated carbon substrates (FePc/AC) are synthesized by an in situ solid approach under the temperatures lower than 300 °C. U–T curves, the value distance to the average U, dU/dT via mathematical differentiation and numerical analysis were employed to investigate to the catalytic reduction of SOCl2 systematically. The U–T curve of the battery containing the FePc/AC displays almost perfect rectangle profile. The average voltage of the battery contains the FePc/AC is 3.00 V, 0.21 V higher than that without the catalysts. After discharge, the surface of the carbon cathode containing FePc/AC displays a well-constructed loose morphology composed of LiCl nanoparticles around 100 nm in diameter. The inside of carbon cathode shows a dense morphology with a mount of nano holes around 50 nm, indicating that the formed LiCl permeates into the interior of the carbon cathode, attributing to that the FePc/AC nanocomposite catalysts facilitate the reduction of SOCl2, leading the formation loose LiCl film in nano scale for electrolyte SOCl2 and the formed LiCl diffusion.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Qinglong Wang,Haiyan Li,Jing-He Yang,Qian Sun,Qiuye Li,Jianjun Yang
Iron(II) phthalocyanine (FePc) is immobilized on graphene sheets to form a graphene(G)/iron(II) phthalocyanine hybrid (G/FePc) by the π–π stacking method. The resultant hybrids are characterized by UV–vis absorption spectra, FTIR, Raman spectra, BET, TEM, SEM and XRD. The result suggests that the interaction between graphene and FePc follows a donor-acceptor mode and the loading of FePc on graphene sheets not only facilitates the dispersion of FePc on graphene but also promotes the exfoliation of the graphene sheets. These samples are tested for photocatalytic degradation of phenol under visible light irradiation ( λ ≥ 420 nm). And the photocatalytic activity of graphene, which is not presented when graphene individually acts on phenol, is greatly enhanced because of the π–π stacking interaction when FePc loaded on graphene. The G/FePc hybrid containing 25 wt.% FePc (G/FePc-0.25) exhibits the best photoactivity among the different loading content of FePc, whose degradation rate for phenol achieves 77.1% in the presence of H 2 O 2 under visible light irradiation for 3 h.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Jiaqi Zhao,Zhanwei Xu,Yujiao Zhang,Jin QingZhu,Longhua Guo,Siyu Chen,Xuetao Shen,Jiayin Li,Zhi Li
The sluggish transition and shuttle of polysulfides (LiPS) significantly hinder the application and commercialization of Li-S batteries. Herein, carbon nanotubes (CNTs) supported 10 nm sized iron Hexadecafluorophthalocyanine (FePcF16/CNTs) are prepared using a solid synthesis approach. The well-exposed FePcF16 molecular improve the LiPS capture efficiency and redox kinetics by its central Fe-N4 units and F functional groups. The strong electron withdraw F groups significantly promote the conjugate effect and decrease the steric hindrance during mass migration procedure. Distribution of relaxation time (DRT) analysis shows that the Fe-N4 units exhibit strong affinity towards LiPS and the F groups further improve the Li+ diffusion rate in Li2S nucleation and oxidation procedure, accomplishing a porous surface on cathode. As a result, the FePcF16/CNTs separator exhibits a high initial capacity of 1136.2 mAh g-1 at 0.2 C, outstanding rate capacity of 624.9 mAh g-1 at 5 C and superior long-term stability at 2 C surviving 300 cycles with a low capacity decay of 0.43‰ per cycle.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2020
·
IF 14.588
Suya Zhou,Shuo Yang,Xinwei Ding,Yuchong Lai,Huagui Nie,Yonggui Zhang,Dan Chan,Huan Duan,Shaoming Huang,Zhi Yang
The sluggish reaction kinetics at the cathode/electrolyte interface of lithium–sulfur (Li–S) batteries limits their commercialization. Herein, we show that a dual-regulation system of iron phthalocyanine (FePc) and octafluoronaphthalene (OFN) decorated on graphene (Gh), denoted as Gh/FePc+OFN, accelerates the interfacial reaction kinetics of lithium polysulfides (LiPSs). Multiple in situ spectroscopy techniques and ex situ X-ray photoelectron spectroscopy combined with density functional theory calculations demonstrate that FePc acts as an efficient anchor and scissor for the LiPSs through Fe···S coordination, mainly facilitating their liquid–liquid transformation, whereas OFN enables Li-bond interaction with the LiPSs, accelerating the kinetics of the liquid–solid nucleation and growth of Li2S. This dual-regulation system promotes the smooth conversion reaction of sulfur, thereby improving the battery performance. A Gh/FePc+OFN-based Li–S cathode delivered an ultrahigh initial capacity of 1604 mAh g–1 at 0.2 C, with an ultralow capacity decay rate of 0.055% per cycle at 1 C over 1000 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2017
·Vol. 53
·期 7
·4927-4938
·
IF 2.599
Liu Ran,Zhang Juan,Xu Zhice,Zhao Dishun,Sun Shuang
Iron phthalocyanine (PcFe) was loaded on Ti-MCM-41 as visible light photocatalyst (R-PcFe/Ti-MCM-41). Dibenzothiophene (DBT) was photooxidized using R-PcFe/Ti-MCM-41 as a photocatalyst, air as an oxidant, and ionic liquid as the extraction agent during visible light irradiation at room temperature and ambient conditions. The results indicated that photocatalytic efficiency of the amino iron phthalocyanine (NH 2 -PcFe)/Ti-MCM-41 was superior to the other substituent groups. The DBT content in the model oil decreased from 1000 to 44 μg/mL with 95.6% removal rate under the optimal reaction conditions (model oil 10 mL, photocatalyst NH 2 -PcFe/Ti-MCM-41 0.02 g, loading amount of NH 2 -PcFe 0.3 g/g, air flow rate 100 mL/min, reaction time 2 h, room temperature). The kinetics of photocatalytic oxidation of DBT follows first-order kinetics with a rate constant of 1.319 h −1 and halftime of 0.525 h. The photocatalyst NH 2 -PcFe/Ti-MCM-41 was reused for five times, and the catalytic activity decreased slightly. The photocatalytic oxidation system demonstrated significant desulfurization effects on different sulfur compounds and real gasoline, and the sulfur content of the actual gasoline could be reduced from 1000 to 78 ppm.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·
IF 3.5
Xiaoyu Chu,Xinrui Wang,Shuo Tian,Yongkuo Zhao,Shikai Liu,Hong Yan,Yan Shang
Modulating the photogenerated electrons of CeO2 to activate O2 and efficiently photocatalytic degradation of chlorophenols is a highly desired goal. Herein, we have successfully fabricated FePc/CeO2 heterojunction through H-bond induced assembly. The photocatalytic degradation of 2, 4-DCP by the amount-optimized FePc/CeO2 nanocomposite was improved by 3 times compared with pure CeO2. By means of electron paramagnetic resonance (EPR) and single wavelength photocurrent spectroscopy, it is confirmed that the excellent photocatalytic performance is mainly attributed to the formation of Z-scheme heterojunction, which promotes charge separation and transfer, and the introduction of FePc broadens the visible light absorption range of heterojunction. Moreover, O2 temperature-programmed-desorbed curves and electrochemical O2 reduction measurements results demonstrate that the single Fe-N4(II) site in FePc is more conducive to promoting O2 activation than that of other metal phthalocyanines. Based on in situ FT-IR and liquid chromatography-tandem mass spectrometry (LC-MS), a possible reaction pathway of 2, 4-DCP degradation was proposed. This study provides a novel strategy to prepare CeO2 based Z-scheme heterojunctions with abundant monoatomic sites for pollutant degradation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Zhendong Wang,Zhexin Zhu,Gangqiang Wang,Xiaoji Ma,Wangyang Lu
Iron (II) phthalocyanine (FePc) is loaded on the surface of the tourmaline (TM) by the reflow method to obtain FePc/TM. This research effectively prevents the π-π stacking of FePc, increased the effective utilization rate of PMS activation under solar light, and further improved the catalytic performance of the catalytic system. The catalytic oxidation efficiency of FePc/TM on carbamazepine (CBZ) and sulfadiazine (SD) can reach 99% under solar light for 15 and 5 min, the total organic carbon (TOC) removal rate can reach 58% and 69% under solar light for 120 min. After 6 cycles, the CBZ removal rate remained above 95%. In addition, the FePc/TM catalytic system has an excellent removal rate for other pharmaceuticals. The results of spin-trapped electron paramagnetic resonance and classical quenching experiments show that FePc/TM can effectively activate PMS to generate active species under solar light, including superoxide radical (•O2−), singlet oxygen (1O2), hydroxyl radicals(•OH), and sulphate radicals (SO4•−). The intermediates of CBZ were identified by Ultra-high performance liquid chromatography and high resolution mass spectrometry, and the degradation pathway was proposed. As the reaction progresses, all CBZ and intermediates are reduced and converted into small acids, or mineralized to H2O, CO2. This work provides an alternative method for the design of efficient activation of PMS activation catalysts under solar light to eliminate residual pharmaceuticals in actual water bodies.
研究领域:
环境科学
·
催化化学
·
污染控制
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Wenlin Zhang,Di Jiao,Lu-Hua Zhang,Fengshou Yu
Iron phthalocyanine (FePc) is a promising non-noble metal catalyst for oxygen reduction reaction (ORR). While, with the plane-symmetric FeN 4 site, the ORR activity of FePc is generally low due to its low ability to adsorb and activate O 2 . Herein, we anchor FePc on Mg(OH) 2 / N -doped carbon nanosheets building the ternary plate-like catalyst FePc/Mg(OH) 2 /NC. Theoretical and experimental results show that due to the formation of FePc/Mg(OH) 2 heterojunction, the electron spin state of the monodisperse iron active site ranges from medium spin (MS, t 2g 5 e g 1 ) to low spin (LS, t 2g 6 e g 0 ), enhancing the adsorption with oxygen-containing intermediates, thereby improving the dynamics of the oxygen reduction reaction. As a result, FePc/Mg(OH) 2 /NC catalyst exhibits an outstanding performance (E 0 = 1.02 V, E 1/2 = 0.91 V) for ORR, superior to the commercial Pt/C electrode (E 0 = 1.01 V, E 1/2 = 0.85 V) and FePc/NC (E 0 = 0.97 V, E 1/2 = 0.87 V) under the alkaline conditions. This work offers a new way for the rational design of effective Fe N C catalysts with the support of metal oxides/hydroxides.
研究领域:
材料科学
·
电化学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 60
·36828-36835
·
IF 3.119
Jinyun Peng,Liying Wei,Yuxia Liu,Wenfeng Zhuge,Qing Huang,Wei Huang,Gang Xiang,Cuizhong Zhang
Vanillin is widely used as a flavor enhancer and is known to have numerous other interesting properties, including antidepressant, anticancer, anti-inflammatory, and antioxidant effects. However, as excess vanillin consumption can affect liver and kidney function, simple and rapid detection methods for vanillin are required. Herein, a novel electrochemical sensor for the sensitive determination of vanillin was fabricated using an iron phthalocyanine (FePc)-based metal–organic framework (MOF). Scanning electron microscopy and transmission electron microscopy showed that the FePc MOF has a hollow porous structure and a large surface area, which impart this material with high adsorption performance. A glassy carbon electrode modified with the FePc MOF exhibited good electrocatalytic performance for the detection of vanillin. In particular, this vanillin sensor had a wide linear range of 0.22–29.14 μM with a low detection limit of 0.05 μM (S/N = 3). Moreover, the proposed sensor was successfully applied to the determination of vanillin in real samples such as vanillin tablets and human serum.
研究领域:
分析化学
·
材料科学
·
医学检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2020
·Vol. 11
·期 1
·1-8
·
IF 12.121
Chen Kejun,Liu Kang,An Pengda,Li Huangjingwei,Lin Yiyang,Hu Junhua,Jia Chuankun,Fu Junwei,Li Hongmei,Liu Hui,Lin Zhang,Li Wenzhang,Li Jiahang,Lu Ying-Rui,Chan Ting-Shan,Zhang Ning,Liu Min
Iron phthalocyanine (FePc) is a promising non-precious catalyst for the oxygen reduction reaction (ORR). Unfortunately, FePc with plane-symmetric FeN 4 site usually exhibits an unsatisfactory ORR activity due to its poor O 2 adsorption and activation. Here, we report an axial Fe–O coordination induced electronic localization strategy to improve its O 2 adsorption, activation and thus the ORR performance. Theoretical calculations indicate that the Fe–O coordination evokes the electronic localization among the axial direction of O–FeN 4 sites to enhance O 2 adsorption and activation. To realize this speculation, FePc is coordinated with an oxidized carbon. Synchrotron X-ray absorption and Mössbauer spectra validate Fe–O coordination between FePc and carbon. The obtained catalyst exhibits fast kinetics for O 2 adsorption and activation with an ultralow Tafel slope of 27.5 mV dec −1 and a remarkable half-wave potential of 0.90 V. This work offers a new strategy to regulate catalytic sites for better performance.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 11
·2557-2567
·
IF 7.779
Cheng Han,Xiaodeng Zhang,Qiuhong Sun,Dandan Chen,Tingting Miao,Kongzhao Su,Qipeng Li,Shaoming Huang,Jinjie Qian
The oxygen reduction reaction (ORR) on the cathode is of great significance in fuel cells and metal–O2 batteries, which is well demonstrated and highly efficient in nature. Herein, iron phthalocyanine (FePc) is encapsulated into the nanosized pores of a new porous metal–organic framework (MOF) of BMM-14 to give FePc@BMM-14. It shows a series of atomically dispersed Fe-based active species embedded into N-doped Fe@NC(x+y) samples after calcination, where x and y represent the FePc concentration and temperature, respectively. During pyrolysis, the rapid volatilization of Zn contents can further expand the framework to form more loose carbon nanomaterials with abundant active components, including FeNx and ultrafine Fe-based nanoparticles. Compared to the state-of-the-art Pt/C, the obtained Fe@NC(10+900/1000) exhibits satisfactory ORR performance to give a large limiting current of −5.22/−5.16 mA cm−2 (0.3 V vs. RHE), small Tafel slope of −51.1/−38.9 mV dec−1, and excellent stability. Meanwhile, the assembled batteries based on the two above catalysts show high activity, indicative of being potential substitutes to those noble metals consolidated by the theoretical calculations. This work demonstrates phthalocyanine-induced Fe-based active species in MOF-derived graphitic carbon as efficient ORR electrocatalysts for zinc–air batteries, which can be extended into the reasonable design and preparation of cost-effective but highly efficient catalysts for various energy-related applications.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Shide Wu,Yifei Zhang,Dan Ping,Yapeng Li,Wan Li,Shuqing Liu,Di Wu,Shiwen Wang,Xuzhao Yang,Guanglu Han,Dongjie Guo,Shaoming Fang
Developing efficient electrocatalysts for CO 2 electroreduction to syngas with a specific H 2 /CO ratio over a wide potential window is desperately required but still challenging. In this work, a series of dual-site catalysts composed of iron phthalocyanine (FePc) and ∼18 nm Cobalt nanoparticles (Co NPs) anchored on N-doped carbon matrix has been constructed from zeolitic imidazolate framework-67 (ZIF-67). Benefiting from the synergistic effect of FePc and Co NPs, the derived FePc/Co@N–C catalyst shows impressive capability for CO 2 electrolysis to syngas. By varying the pyrolysis temperatures (600–800 °C) of ZIF-67 and the mass ratio of Co@N–C to FePc (1–3), an adjustable H 2 /CO ratio of 2–4 is obtained, and the value can be maintained stable within a potential window of −0.66 to −0.86 V vs . RHE in an H-type cell. Moreover, this electrocatalyst exhibits favorable stability without distinct performance decay. When conducted in a flow cell, an enhanced catalytic activity is demonstrated with an industrial current density (>100 mA cm −2 ) at −0.8 V vs . RHE and a steady H 2 /CO ratio of 2 from −0.4 to −0.6 V vs . RHE. This work provides a promising strategy of designing bifunctional electrocatalysts for syngas generation with stable H 2 /CO ratio across a wide potential range.
研究领域:
材料科学
·
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）