INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2021
·Vol. 45
·期 15
·21264-21273
·
IF 5.164
Lijie Zhang,Yihang Li,Binze Zhang,Yanhong Wan,Zheqiang Xu,Shaowei Zhang,Tenglong Zhu,Changrong Xia
Summary As a promising technology to address the energy storage challenge, reversible solid oxide cell (RSOC) plays a vital role in conversion between chemical energy and electrical power. Over the last several decades, developing high performance fuel electrodes suitable for reversible operation have attracted extensive attentions. This work develops La 0.1 Sr 0.85 Ti 0.35 Fe 0.6 Ni 0.05 O 3− δ which is an A-site deficient design with B-site having additional 5% nickel as the fuel electrode through in-situ metal exsolution. The in-situ exsolution process results in FeNi 3 alloy particles, about 40 nm in size, while maintaining the perovskite structure of the parent oxide. The FeNi 3 nanoparticles greatly improve the electrochemical performance as RSOC fuel electrode such as reducing the interfacial polarization resistance at 800°C by 13.6%, increasing the peak power density by 19% in the fuel cell mode and increasing the current density by 30% in the electrolysis mode. Furthermore, RSOC operation is demonstrated by 20-cycle reverse tests that are conducted by switching between the fuel cell and electrolysis modes. The stable RSOC performance indicates that La 0.1 Sr 0.85 Ti 0.35 Fe 0.6 Ni 0.05 O 3− δ with in-situ constructed FeNi 3 nanoparticles is a potential fuel electrode material for RSOC.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Jiabo Wang,Jie Zhang,Peng Zhang,Yalin Fu,Zhentao Liu,Baolei Liu,Jibo Zhang,Li Chen
ABSTRACT The oxygen evolution reaction (OER) is a key half-reaction in renewable energy-related technologies, such as the electrocatalytic water splitting process and carbon dioxide reduction reaction. Unfortunately, developing an efficient and stable electrocatalyst to overcome the sluggish kinetics of OER remains a challenge. Herein, uniformly dispersed NiO and FeNi 3 alloy nanoparticles anchored on N-doped porous carbon (NC) electrocatalysts were designed and synthesized by a facile two-step calcination strategy. The influence of calcination temperature and the molar ratio of Ni:Fe on electrocatalytic OER activity was particularly studied. With an optimal calcination temperature and Ni/Fe ratio, FeNi 3 @NC-800 exhibited outstanding OER performance with a low overpotential of 242 mV at a current density of 10 mA cm −2 and a small Tafel slope of 34.7 mV dec −1 in alkaline media. The enhanced OER activity of FeNi 3 @NC-800 is mainly due to the synergistic effect of FeNi 3 alloy nanoparticles with NC and the high electrical conductivity between FeNi 3 and NC. This research will offer a new perspective on the construction of efficient and stable non-noble metal OER electrocatalyst.
研究领域:
电化学
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材料科学
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可再生能源
·
催化
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2021
·
IF 4.724
Ping Li,Yimin Xuan,Biao Jiang,Shaowei Zhang,Changrong Xia
Symmetrical solid oxide electrolysis cells (Sym-SOECs) have emerged as one of the most attractive cells for direct CO 2 electrolysis owing to their structural advantages, low cost, and reversible operability. However, their practical applications are limited due to the non-availability of fuel electrode electrocatalysts with excellent performance. In this study, hollow La 0.6 Sr 0.4 Ni 0.2 Fe 0.75 Mo 0.05 O 3-δ (LSNFM) electrodes were prepared via a mild molten-salt-assisted approach. Subsequently, quasi-Sym-SOECs were constructed using LSNFM electrodes, where the cathode exsolved FeNi 3 nanoparticles to enhance CO 2 reduction performance. Compared with Sym-SOECs, the proposed quasi-Sym-SOECs show improved current density of electrolysis and reduced interfacial polarization resistance, which demonstrate the advantages of quasi-Sym-SOECs for CO 2 electrolysis.
研究领域:
材料科学
·
电化学
·
能源转换与存储
✓ 已验证
产品关联
DOI
高影响因子
Science of Advanced Materials
·
2020
·Vol. 12
·期 7
·1065-1077
·
IF 1.117
Xu Jingfeng,Zhao Yilei
From the perspective of targeting factors, iron acetylacetonate and nickel acetylacetonate were used as major materials, and oleylamine was used as a solvent. Through thermal decomposition, the uniformly distributed nanoparticle FeNi3 was obtained. Then, the α-methyltryptophan
(AMT) was used to modify FeNi3, thereby the material (FeNi3-AMT) would be biocompatible. The prepared material was used as a targeting factor to explore whether it could target the epileptogenic focus in temporal lobe epilepsy model rats. In the experiment, the animal
models of temporal lobe epilepsy were constructed by using the lithium chloride-pirocarpine method. According to the injection of the nuclear magnetic factor, the models were divided into the FeNi3 group, the FeNi3-AMT group, and the saline group. The model rats received
intravenous injections 48 hours after the onset of epilepsy. The activity of the epileptic seizure sites before and after injection, the penetration of nanoparticles, and the toxic and side effects of the material were compared. The results showed that the rat models of temporal lobe epilepsy
were successfully constructed (the success rate was more than 85%). Meanwhile, the epilepsy lesions of the rat models added with nanoparticles were darker (P < 0.05). The staining of rat brain sections confirmed the distribution of iron particles. In the FeNi3-AMT group,
there were more iron particles distributed (P < 0.05). In addition, various abnormal neurons appeared in the hippocampus of the three groups, and there was no significant difference between the different groups (P < 0.05). There was no significant difference in the number
of positive neurons in the CA3 region of the brain between different groups (P < 0.05). However, the imaging effect based on FeNi3-AMT was more prominent (P < 0.05), which confirmed that the FeNi3-AMT group had better targeting location effects. The
study confirmed that the iron nano alloy particle material had excellent application values in the localization of temporal lobe epilepsy.
研究领域:
神经科学
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纳米技术
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医学成像
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药理学
✓ 已验证
DOI
高影响因子
APPLIED ENERGY
·
2021
·
IF 9.746
Bangxin Li,John T.S. Irvine,Jiupai Ni,Chengsheng Ni
A solid oxide fuel cell utilizing bio-fuels such as methanol and ethanol could provide a carbon–neutral electricity generation and facilitate its applications in transport or stationary power unit. Herein, Ce 4+ doping in SrFe 0.95 Ni 0.05 O 3 imparts FeNi 3 exsolution and CeO 2 precipitation in a reducing condition, contributing to the fuel reforming, C-C bond cleavage and coke consumption in the anode chamber. The ferrite perovskites are stable in ethanol/steam at 800 °C, whereas they are unstable in ethanol vapor with the high C fugacity inducing the formation of Fe 0 and carbides. However, the Ce 0.2 Sr 0.8 Fe 0.95 Ni 0.05 O 3 anode maintains mostly the perovskite and is free from coke after the 300 h’ operation under C 2 H 5 OH fuel at 0.5 V or 0.7 V because of the dynamic balance between the carbon deposition and consumption since an operation for 10 h shows a clear carbon deposition. A maximum power density of 0.58 W cm −2 and a polarization resistance of 0.21 Ω cm 2 at 800 °C can be obtained for the symmetrical solid oxide fuel cell with identical Ce 0.2 Sr 0.8 Fe 0.95 Ni 0.05 O 3 cathode and anode under an ethanol fuel. The results demonstrate that the reversible and stable SrFeO 3 with Ce/Ni co-doping has a bright prospect for alcohol fuel oxidation.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2026
·
IF 11.8
Bosen Lei,Siyuan Dong,Zhonghua Wang,Jie Han,Weitong Wang,Zhimao Yang,Li Jin,Jian Wu,Chuncai Kong
Electromagnetic wave absorbing (EWA) materials remain limited by steady-state thermodynamic design, restricting the use of non-equilibrium thermodynamic–kinetic competition to tailor intrinsic electromagnetic properties. Here, we report a carbothermal-reduction-driven metastable engineering strategy for programmable FeNi 3 –high-entropy oxide (HEO) biphasic composites on reduced graphene oxide under low oxygen partial pressure. By tuning thermodynamic driving forces and kinetic barriers, the FeNi 3 metastable fraction is precisely regulated from 0% to 80.4%. Density functional theory shows that FeNi 3 is kinetically favored due to lower migration barriers, while HEO is thermodynamically stabilized by lower Gibbs free energy, enabling controllable phase coexistence. Fe–N site modification further enhances interfacial polarization and magneto-dielectric coupling, improving impedance matching and attenuation. The optimized composite achieves a minimum reflection loss of −50.6 dB in the Ku band at low filler loading. Integrated into flexible metamaterials, the effective absorption bandwidth expands to 35.9 GHz (4.1–40 GHz), with excellent mechanical flexibility and strong radar cross-section reduction and radio-frequency shielding. This work establishes a cross-scale metastable engineering paradigm spanning carrier regulation, phase competition, and metamaterial design for high-performance electromagnetic absorbers.
✓ 已验证
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Lunhong Ai,Yao Tian,Tanyang Xiao,Jiayi Zhang,Chenghui Zhang,Jing Jiang
Renewable electricity driven water splitting is a promising way for clean hydrogen production, but the practical application of this technology is greatly impeded by the sluggish kinetics of the anodic oxygen evolution reaction (OER). Considering a typical endothermic nature of water splitting that is highly sensitive to temperature, herein, we introduce a simple, convenient and non-contact in situ self-heating mode to combine with OER-active electrocatalysts, enabling the reduced reaction energy barrier and the enhanced electrocatalytic performances. The RuNiFeO x /FeNi 3 heterostructures are designed and grown on iron foam (IF) substrate using a facile redox corrosion strategy followed by the controllable heat treatment. The RuNiFeO x /FeNi 3 heterostructures with the narrow bandgap characteristic can generate a distinctive photothermal effect. The local temperature of electrode surface can immediately increase under NIR light irradiation, offering an impressive self-heating platform to promote OER catalysis. The RuNiFeO x /FeNi 3 /IF significantly reduces the OER overpotential by the combination with photothermal effect. Meanwhile, the RuNiFeO x /FeNi 3 /IF demonstrates the stable and reproducible photothermal-electrocatalytic behaviors. This research offers a new vision for the rational design of advanced electrocatalytic systems coupled with photothermal effect to lower activation energy barriers and promote electrocatalysis of water splitting.
研究领域:
材料科学
·
能源化学
·
光电催化
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Dianchen Feng,Jianshe Zhang,Xiaokun Jiang,Hao Li,Baodui Wang,Yanghuan Zhang
Hydrogen is regarded as an attractive secondary energy carrier because of its high gravimetric energy density and environmentally benign conversion products. However, the practical application of hydrogen energy is still strongly limited by the lack of safe and efficient hydrogen storage materials. Among various solid-state hydrogen storage candidates, MgH 2 has attracted extensive attention due to its high theoretical hydrogen capacity, natural abundance, and low cost. Nevertheless, its practical use is hindered by high thermodynamic stability and sluggish hydrogen absorption/desorption kinetics. In this work, a rod-like Fe 3 O 4 /FeNi 3 heterointerface catalyst regulated by multivalent Mo and V species was synthesized via a one-step hydrothermal route followed by calcination, and its catalytic effect on the hydrogen storage behavior of MgH 2 was systematically investigated. The results show that the addition of the catalyst markedly improves the hydrogen sorption performance of MgH 2 . In particular, the MgH 2 + 5 wt% catalyst composite absorbs 5.70 wt% H 2 within 1 min and desorbs 6.52 wt% H 2 within 10 min at 593 K, indicating a substantial enhancement in sorption kinetics. Meanwhile, the onset dehydrogenation temperature is significantly reduced from 570 K for pristine MgH 2 to 463 K for the catalyst-containing sample, and the apparent dehydrogenation activation energy decreases from 132.66 to 69.85 kJ mol −1 H 2 . Structural and kinetic analyses suggest that the enhanced performance mainly originates from the synergistic effect of the Fe 3 O 4 /FeNi 3 heterointerface, which facilitates H 2 dissociation, interfacial hydrogen transfer, and Mg–H bond activation. The Mo/V species are considered to act primarily as electronic regulators at the surface/interface region rather than as separate bulk crystalline phases. This work provides useful insight into oxide-metal heterointerface engineering for improving the hydrogen storage properties of MgH 2 .
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2024
·
IF 10.7
Ruizhe Hu,Xue He,Yuqi Luo,Chongbo Liu,Shiyu Liu,Xintong Lv,Jinxi Yan,Yuhui Peng,Mingyue Yuan,Renchao Che
Structural design and interface regulation are useful strategies for achieving strong electromagnetic wave absorption (EMWA) and broad effective absorption bandwidth ( EAB ). Herein, a monomer-mediated strategy is employed to control the growth of covalent organic framework (COF) wrapping flower-shaped Gd-doped FeNi 3 (GFN), and a novel raspberry-like absorbent based on biomimetic design is fabricated by thermal catalysis. Further, a unique dielectric-magnetic synergistic system is constructed by utilizing the COF-derived nitrogen-doped porous carbon (NPC) as the shell and anisotropic GFN as the core. The electromagnetic parameters of the GFN@NPC composites can be tuned by adjusting the proportions of GFN and NPC. Off-axis electron holography results further clarify the interface polarization and microscale magnetic interactions affecting the EMW loss mechanism. As a result, the GFN@NPC samples exhibit broad EMWA performance. The EAB values of all GFN@NPC composites reach up to 6.0 GHz, with the GFN@NPC-2 sample showing a minimum reflection loss ( RL min ) of −69.6 dB at 1.68 mm. In addition, GFN@NPC-2 achieves a maximum radar cross–section (RCS) reduction of 29.75 dB·m 2 . A multi-layer gradient structure is also constructed using metamaterial simulation to achieve an ultra-wide EAB of 12.24 GHz. Overall, this work provides a novel bio-inspired design strategy to develop high-performance EMWA materials.
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
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Junyang Ding,Qian Sun,Li Zhong,Xian Wang,Lulu Chai,Qipeng Li,Ting-Ting Li,Yue Hu,Jinjie Qian,Shaoming Huang
Rapid deployment of renewable energy causes a significant change in environmental benefits. Thus, the transition metal-based electrocatalysts are developed to achieve efficient water splitting. Here a simple three-step method is adopted to successfully synthesize a type of hollow MOF-derived three-dimensional carbonaceous matrix that is randomly loaded with numerous FeNi 3 alloy nanoparticles ( NiFeC ). In this work, the as-obtained NiFeC-800–5 (carbonization temperature: 800 °C; pyrolysis rate: 5 °C/min) shows an excellent oxygen evolution reaction catalytic activity in 1.0 M KOH electrolyte, with a low overpotential of 269 mV at 10 mA cm -2 and a low Tafel slope of 72 mV dec ‑ 1 . Moreover, it exhibits an ultrastable durability after being electrolyzed continuously for 10 h, which is originated from these fine alloys encapsulated into the hierarchically porous carbonaceous material. Finally, we have proposed morphological and chemical changes for the NiFeC-800–5 sample, in which the solid MOF precursor will be gradually etched into the hollow morphology by the strong hydrolysis of Fe(III) ions at high temperature, and the optimal carbonization temperature and heating rate are also well investigated. Moreover, the above approach can be used to obtain other MOF derived bimetallic alloy nanoparticles encapsulated into carbon materials for the energy conversion and storage applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2023
·Vol. 190
·期 4
·1-11
·
IF 5.7
Li Yangguang,Yang Qiaoran,Feng Yifan,Ye Bang-Ce
For practical analysis and simultaneous detection of arbutin (AR) and hydrochinone (HQ) in cosmetics, an electrochemical sensor has been designed based on nitrogen and sulfur co-doped Fe–Ni alloy (N,S-FeNi 3 /C) nanoparticles. The N,S-FeNi 3 /C has been prepared for the first time via hydrothermal synthesis and high-temperature carbonization. N,S-FeNi 3 /C not only improves the charge transfer to the surface, but also provides rich active sites and fast ion diffusion rates owing to the iron and nickel bimetallic materials. In addition, the d-band structure of transition metals (nickel and iron) introduced by the N and S atoms exhibits an electronic structure similar to that of noble metal catalysts, thus enhancing electrocatalytic activity and increasing conductivity. Additionally, the double doping of S and N atoms significantly increases the active sites of carbon atoms; thus, N-S-FeNi3/C exhibits excellent electrochemical catalytic activity for the oxidation of AR and HQ. Further, the N,S-FeNi 3 /C sensor is used for the simultaneous determination of HQ and AR by square-wave pulse voltammetry. Distinct oxidation peaks of HQ and AR are observed at potentials of +0.028 V and +0.352 V (vs. SCE). The electrical signal increases linearly in the HQ concentration ranges of 0.1–100 μM and 0.05–70 μM for the simultaneous determination of AR and HQ with a detection limit as low as 0.0476 and 0.0135 μM (S/N = 3), respectively. Thus, rapid and accurate detection of AR and HQ in spiked cosmetics is successfully achieved, with a recovery ranging from 96.4 to 104.2%, and the relative standard deviation is lower than 3.8–4.0%. Graphical Abstract
研究领域:
分析化学
·
材料科学
·
化妆品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Materials
·
2024
·Vol. 4
·期 1
·N
·
IF 11.8
Teng Ke,Sining Yun,Kaijun Wang,Tian Xing,Jiaoe Dang,Yongwei Zhang,Menglong Sun,Jinhang An,Lijianan Liu,Jiayu Liu
Accelerants can enhance methane production in biomass energy systems. Single-component accelerants cannot satisfy the demands of anaerobic co-digestion (AcoD) to maximize overall performance. In this work, nitrogen-doped bio-based carbon derived from coconut shells, containing bimetallic Ni/Fe nanoparticles, FeNi3 alloys, and compounds (Fe2O3, FeN, and Fe3O4), was constructed as hybrid accelerants (Ni-N-C, Fe-N-C, and Fe/Ni-N-C) to boost CH4 production and CO2 reduction. The cumulative biogas yield (553.65, 509.65, and 587.76 mL/g volatile solids), methane content (63.58%, 57.90%, and 67.39%), and total chemical oxygen demand degradation rate (60.15%, 54.92%, and 65.38%) of AcoD with Ni-N-C (2.625 g/L), Fe-N-C (3.500 g/L), and Fe/Ni-N-C (2.625 g/L) were higher than control (346.32 mL/g volatile solids, 40.13%, and 32.03%), respectively. These digestates with Ni-N-C, Fe-N-C, and Fe/Ni-N-C showed excellent stability (mass loss: 22.97%-32.75%) and total nutrient content (4.43%-4.61%). Based on the synergistic effects of the different components of the hybrid accelerant, an understanding of the enhanced methanogenesis of AcoD was illustrated.
研究领域:
环境工程
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可再生能源
·
生物能源
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废物资源化
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微生物代谢
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材料科学
·
碳材料化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）