MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Xinmei Qian,Chunxiang Li,Mingyu Zheng,Jinglun Wang,Haowen Huang,Keqin Deng
In this work, a regenerable magnetic omeprazole electrochemical sensor was developed for the first time. Firstly, a magnetic bamboo-like nitrogen-carbon (N-C) nanotubes encapsulated with iron-nickel alloy (FeNi) nanoparticles (FeNi@N-CNTs) was prepared by a pyrolysis route. The characterization techniques including high resolution transmission electron microscopy (HRTEM), scanning electron microscope (SEM), X-ray diffraction (XRD), energy disperse spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) revealed the surface morphology, structure, and chemical composition of the FeNi@N-CNTs. Cyclic voltammograms (CVs) and electrochemical impedance spectroscopy (EIS) results indicated that FeNi@N-CNTs had excellent conductivity and greatly facilitated the electron transfer. By applying FeNi@N-CNTs, a designed magnetic base support, and screen-printed electrode (SPE), a regenerable magnetic SPE was developed. The presence of FeNi@N-CNTs caused better omeprazole electron transfer kinetics at SPE surface. The FeNi@N-CNTs/SPE showed a linear detection range of 0.05–25.0 μM with a detection limit of 14 nM (S/N = 3) for detecting omeprazole. Due to the FeNi@N-CNTs adhering to SPE surface by magnetic control and easy disengagement from the electrode surface by magnetism, the proposed sensor was simple, regenerable, and cost-effective.
研究领域:
分析化学
·
材料科学
·
电化学传感器
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Zhiwen Xu,Guangyu Chen,Fei Yang,Juhee Jang,Guimei Liu,Fei Xiao,Yan Sun,Xiaoyi Qiu,Weiwei Chen,Dong Su,Meng Gu,Minhua Shao
The development of inexpensive and high-performance bifunctional electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is of crucial significance for rechargeable metal-air batteries , but remains challenging. Herein, we report an ingenious bifunctional oxygen electrocatalyst integrating ZIF-derived carbon-anchored Fe/Ni single atoms, FeNi alloy nanoparticles , and graphene support (denoted as Fe/Ni-NC||FeNi@G). Synergizing highly active Fe single atoms for the ORR and highly efficient FeNi alloy nanoparticles for the OER, the as-constructed Fe/Ni-NC||FeNi@G catalyst exhibits outstanding bifunctionality; the potential gap between the OER potential at 10 mA cm –2 and the ORR half-wave potential is only 0.618 V, outperforming the benchmark Pt/C + Ir/C catalyst and most transition metal-based bifunctional catalysts reported in the literature. More importantly, the Fe/Ni-NC||FeNi@G-driven zinc-air battery (ZAB) delivers a maximum power density of ∼200 mW cm –2 , a specific capacity of 876 mAh g –1 , and excellent cycling stability with negligible voltage decay up to 500 hours (3000 cycles). This work provides an effective approach to designing highly efficient non-noble metal multifunctional catalysts for practical applications in rechargeable metal-air batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
催化
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Alam Venugopal Narendra Kumar,Yinghao Li,Hongjie Yu,Shuli Yin,Hairong Xue,You Xu,Xiaonian Li,Hongjing Wang,Liang Wang
It is essential to design an oxygen evolution reaction (OER) electrocatalyst with smaller overpotential to improve water electrolyzer efficiency. Here, we report a simple method to incorporate nickel hexacyanoferrate into the three-dimensional (3D) graphene aerogel (GA) structure (NiHCF/GA), through which we have derived OER active FeNi-P/GA catalyst by heating with the phosphide source. Structural characterization data disclosed that the NiHCF derived FeNi-P particles were uniformly distributed in the 3D GA network. The obtained FeNi-P/GA catalyst exhibits precursor ([K 3 Fe(CN) 6 ] and NiCl 2 ) concentration-dependent electrocatalytic activity towards OER. Linear sweep voltammetry (LSV) study shows OER on the optimized FeNi-P/GA catalyst surface commenced at 1.46 V vs . RHE and demands only 280 mV overpotential to achieve the benchmark current density of 10 mA.cm −2 . Also, the FeNi-P/GA catalyst displayed a Tafel slope of 43 mV.dec −1 , suggesting its superior OER performance in alkaline condition.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Tao Yu,Shan Su,Yiting Che,Chunfeng Meng,Hu Zhou,Shitan Yan,KABENGA Patrick Ranson,Ting Bian,Aihua Yuan
The development of high-performance transition metal catalysts to replace precious metal catalysts toward oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) reactions is essential and challenging. Rational embedding of transition metal nanoparticles (NPs) into nitrogen-enriched carbon frameworks to obtain bifunctional catalysts is a well-established approach. Here, we have successfully prepared an integrated electrocatalyst consisting of nitrogen-enriched porous carbon nanospheres and FeNi alloy NPs (P-FeNi/NC) by carbonizing the Hofmann-type FeNi metal–organic frameworks (MOFs) coated with polydopamine (PDA). Benefiting from the abundant ORR-active pyridinic-N species and OER-active FeNi alloy NPs, large surface area, and porous carbon framework, P-FeNi/NC-900 demonstrates a competitive ORR/OER activity (E 1/2 = 0.85 V, E j=10 mA cm-2 = 1.62 V). When applied as the air electrode, the discharging specific capacity normalized to the mass of consumed Zn is 817.2 mAh g −1 at 10 mA cm −2 and the corresponding maximum power density is 164 mW cm −2 . Integration of nitrogen-enriched carbon framework and bimetallic alloys provides a new avenue for the rational preparation of bifunctional oxygen electrocatalysis for high-efficiency energy conversion and storage devices.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Liqin Zhou,Wanting Su,Yiran Wang,Yifan Liu,Jiguang Deng,Xiaoping Liu,Zhongxing Zhao,Zhenxia Zhao
Micro/nanoplastics (NPs) have become a new ever-growing threat to the safety of ecosystems and human health. Their efficient capture through porous materials adsorption remains insufficiency to meet practical application requirements. Herein, we propose a sponge-like adsorption strategy for boosting NPs capture in aqueous solution via a novel semi-flexible FeNi-layered double hydroxides (Fe T Ni-LDH) microstructure engineered self-assembly using variable-valence doping approach. Highly-density Fe 3+ is successfully implanted into Ni-LDH through skillful Fe variable-valence (Fe 2+ /Fe 3+ ) doping. With the aid of electrostatic and hydrogen attraction, the rigid LDH nano-sheets are assembled into flexible nano-petals spheres with retractable structures. This Fe T Ni-LDH would be stretched and opened up to adsorb large amounts of NPs via unique sponge-like behavior, and achieve an order of magnitude increase in adsorption capacity (3490 mg·g - 1 ) compared state-of-the-art adsorbents. Moreover, in natural water system, Fe T Ni-LDH is also proved to a removal efficiency exceeding 90 % N-NPs and a significant decrease of the metal ions, broadening its applications in polluted water system. Interestingly, its semi-flexible structure would shrink back to its original petal-like spheres after NPs removal, showing high reproducible cycling performance. The semi-flexible structure design provides a smart sponge-like adsorption strategy for boosting NPs capture.
研究领域:
环境科学
·
材料科学
·
水污染治理
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Qingyu Liu,Yanjun Pan,Qi Cao,Bo Peng,Fanyue Meng,Siyu Wang,Ru Hong,Yucheng Shen,Huiyan Zhang
Upcycling waste plastics into valuable products for eliminating hazardous contaminants in aquatic matrixes represents an attractive approach to addressing the urgent environmental crisis. Herein, the magnetic FeNi@CNTs chainmail catalysts were successfully fabricated from waste plastics via catalytic pyrolysis and employed for peroxymonosulfate (PMS) activation to efficiently degrade norfloxacin (NOR) during the advanced oxidation process. Results revealed that the amount of metal loading played a critical role in the physicochemical properties and catalytic activities of FeNi@CNTs. The optimal NOR removal efficiency (100%) was achieved via FeNi30@CNTs with moderate metal content, which was attributed to the synergy between metal core and CNTs shell. Fe-Ni alloy not only catalyzed the growth of CNTs, but also activated PMS to generate more reactive oxygen species. Furthermore, CNTs acted as quick electron transfer routes to speed up the catalytic reactions and protected the metal core from agglomeration. However, excess metal led to the agglomeration of particles outside CNTs, thus inhibiting NOR degradation. Moreover, FeNi30@CNTs exhibited good stability and reusability during the cyclic experiments. The possible mechanism was deeply discussed by quenching experiments, EPR, XPS, and LC-MS characterizations. This study provides a novel route of waste-to-waste remediation, making FeNi@CNTs an inexpensive and sustainable candidate in antibiotic degradation, and simultaneously opens up a new perspective to alleviate the environmental problems caused by waste plastics.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 11
·1848
·
IF 5.719
Xiangyun Tian,Peng Yi,Junwei Sun,Caiyun Li,Rongzhan Liu,Jian-Kun Sun
The exploration of high-performance and low-cost electrocatalysts towards the oxygen evolution reaction (OER) is essential for large-scale water/seawater splitting. Herein, we develop a strategy involving the in situ generation of a template and pore-former to encapsulate a Ni5P4/Ni2P heterojunction and dispersive FeNi alloy hybrid particles into a three-dimensional hierarchical porous graphitic carbon framework (labeled as Ni5P4/Ni2P–FeNi@C) via a room-temperature solid-state grinding and sodium-carbonate-assisted pyrolysis method. The synergistic effect of the components and the architecture provides a large surface area with a sufficient number of active sites and a hierarchical porous pathway for efficient electron transfer and mass diffusion. Furthermore, a graphitic carbon coating layer restrains the corrosion of alloy particles to boost the long-term durability of the catalyst. Consequently, the Ni5P4/Ni2P–FeNi@C catalyst exhibits extraordinary OER activity with a low overpotential of 242 mV (10 mA cm−2), outperforming the commercial RuO2catalyst in 1 M KOH. Meanwhile, a scale-up of the Ni5P4/Ni2P–FeNi@C catalyst created by a ball-milling method displays a similar level of activity to the above grinding method. In 1 M KOH + seawater electrolyte, Ni5P4/Ni2P–FeNi@C also displays excellent stability; it can continuously operate for 160 h with a negligible potential increase of 2 mV. This work may provide a new avenue for facile mass production of an efficient electrocatalyst for water/seawater splitting and diverse other applications.Keywords:FeNi alloy;Ni5P4/Ni2P heterojunction;solid-state grinding;in situ template;oxygen evolution reaction
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
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Zhengquan Su,Chao Zhang,Jun Liu,Changhao Liang
Tuning crystal structure of metal nanomaterials is an effective approach to optimize electrocatalytic performance. Here, we employ amorphous FeNi alloy nanoparticles encapsulated in N doped carbon shell (A-FeNi@NC) as an efficient electrocatalyst for oxygen evolution reaction (OER) via laser irradiation in H 2 O. The formation mechanism of amorphous FeNi alloy is due to the rapid heating and cooling rate result from the pulse laser. The following electrochemical measurements indicate that A-FeNi@NC displays much better OER activity compared with the conventional crystalline FeNi alloy nanoparticles encapsulated in N doped carbon shell (C-FeNi@NC). We proposed that amorphous FeNi alloy possess favorable electronic property to optimize electronic state of the external carbon shell and give rise to a higher electrocatalytic activity towards OER. The optimized electronic state of the external carbon shell commonly exists in other amorphous transition metal include FeCo, CoNi and Ni, give birth to a series of efficient electrocatalysts for OER.
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 Minerals Metallurgy and Materials
·
2024
·Vol. 31
·期 4
·812-824
·
IF 5.6
Yang Xuanqi,Wang Honghan,Chen Jing,An Qingda,Xiao Zuoyi,Hao Jingai,Zhai Shangru,Sheng Junye
Electromagnetic wave (EMW)-absorbing materials have considerable capacity in the military field and the prevention of EMW radiation from harming human health. However, obtaining lightweight, high-performance, and broadband EMW-absorbing material remains an overwhelming challenge. Creating dielectric/magnetic composites with customized structures is a strategy with great promise for the development of high-performance EMW-absorbing materials. Using layered double hydroxides as the precursors of bimetallic alloys and combining them with porous biomass-derived carbon materials is a potential way for constructing multi-interface heterostructures as efficient EMW-absorbing materials because they have synergistic losses, low costs, abundant resources, and light weights. Here, FeNi alloy nanosheet array/ Lycopodium spore-derived carbon (FeNi/LSC) was prepared through a simple hydrothermal and carbonization method. FeNi/LSC presents ideal EMW-absorbing performance by benefiting from the FeNi alloy nanosheet array, sponge-like structure, capability for impedance matching, and improved dielectric/magnetic losses. As expected, FeNi/LSC exhibited the minimum reflection loss of −58.3 dB at 1.5 mm with 20wt% filler content and a widely effective absorption bandwidth of 4.92 GHz. FeNi/LSC composites with effective EMW-absorbing performance provide new insights into the customization of biomass-derived composites as high-performance and lightweight broadband EMW-absorbing materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 27
·2300257
·
IF 13.3
Fangyu Gan,Qingrong Rao,Jianqiu Deng,Lichun Cheng,Yan Zhong,Zhao Lu,Feng Wang,Jiang Wang,Huaiying Zhou,Guanghui Rao
The optimization design of micro-structure and composition is an important strategy to obtain high-performance metal-based electromagnetic (EM) wave absorption materials. In this work, ZnO/FeNi composites derived from ZnFeNi layered double hydroxides are prepared by a one-step hydrothermal method and subsequent pyrolysis process, and can be employed as an effective alternative for high-performance EM wave absorber. A series of ZnO/FeNi composites with different structures are obtained by varying the molar ratios of Zn 2+ /Fe 3+ /Ni 2+ , and the ZnO/FeNi composites with a Zn 2+ /Fe 3+ /Ni 2+ molar ratio of 6:1:3 show a hierarchical flower-like structure. Owing to the strong synergistic loss mechanism of dielectric-magnetic components and favorable structural features, this hierarchical flower-like ZnO/FeNi sample supplies the optimal EM wave absorption performance with the highest reflection loss of −52.08 dB and the widest effective absorption bandwidth of 6.56 GHz. The EM simulation further demonstrates that impedance matching plays a determining role in EM wave absorption performance. This work provides a new way for the fabrication of a high-performance metal-based EM wave absorber.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Qinghua Sun,Wenju Xie,Bai Zheng,Yikai Xu,Fulin Xie,Tingfang Tian,Jie Zhao,Yanhe Xiao,Shuijin Lei,Baochang Cheng
Oxygen evolution reaction (OER) is a pivotal half-reaction in electrocatalytic water splitting and metal-air batteries. Non-precious metal heterointerface materials provide significant advantages in enhancing OER activity while reducing costs; however, effective engineering of built-in electric fields (BIEFs) at multi-phase heterointerfaces remains a major challenge. Herein, we report a novel FeNi/Mo₂C@NC multi-phase heterointerface catalyst synthesized via a low-temperature solution combustion method followed by high-temperature annealing. The catalyst exhibits a heterointerface between FeNi and Mo 2 C, while nitrogen-doped carbon (NC) coating interacts further with FeNi and Mo 2 C to form Mott-Schottky heterointerfaces and generate multiple BIEFs that promote charge separation, optimize Fermi levels and fine-tune d-band centers, thereby modifying the adsorption behavior of oxygen-containing intermediates during the OER process. This strategy drives the directional migration of charge carriers along multiple pathways, resulting in rapid charge transfer, enhanced conductivity, and a synergistic improvement in OER performance. The FeNi/Mo 2 C@NC catalyst shows exceptional OER activity, with a low overpotential of 242 mV at a current density of 10 mA cm −2 , a Tafel slope of 68 mV dec −1 derived from steady-state chronoamperometry testing, and excellent catalytic stability over 200 h. This study underscores the importance of engineering multi-phase heterointerfaces and multiple BIEFs to enhance the OER performance of catalysts.
研究领域:
材料科学
·
电催化
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2017
·
IF 4.857
Dandan Wu,Yanqiao Zhang,Ming Wen,Hao Fang,Qingsheng Wu
To meet the requirement of high catalytic efficiency toward the reduction of p-nitrophenyl compounds, we designed a new one-dimensional Fe3O4/FeNi embedded-nanostructured catalyst synthesized by a one-pot controlling-growth-reduction process in a solvothermal system, in which Fe3O4 phase was implanted in the base of FeNi alloy. In the Fe3O4/FeNi catalyst system, the Fe3O4 embedded phase attracts the nitro group of p-nitrophenyl compounds by its high-density electrons, which can efficiently promote the activity of amorphous FeNi active centers for selective catalysis toward the reduction of a range of p-nitrophenyl compounds. Moreover, for the para-group in the nitrophenyl compounds, an increasing electron-donating power contributes to a higher catalytic activity, while electron-withdrawing power obtains the reverse case. Additionally, the Fe3O4/FeNi composite nanocatalyst exhibited an outstanding cycling performance over 20 times without obvious performance decay. This work opens an avenue to design more powerful non-noble metal catalysts for green chemistry.
研究领域:
催化
·
材料科学
·
化学工程
·
环境化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）