APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Yafeng Chen,Heliang Yao,Fantao Kong,Han Tian,Ge Meng,Shuize Wang,Xinping Mao,Xiangzhi Cui,Xinmei Hou,Jianlin Shi
Oxygen evolution reaction (OER) is a pivotal electrochemical reaction process for many renewable energy technologies. Due to the sluggish OER kinetics, searching for efficient low-cost non-precious metal catalysts is one of the crucial but very challenging steps. Herein, V 2 C MXene synergistically coupled with hypophosphite-intercalated FeNi (oxy)hydroxide (H 2 PO 2 − /FeNi-LDH-V 2 C) electrocatalyst is synthesized. The H 2 PO 2 − /FeNi-LDH-V 2 C exhibits excellent OER performance with an overpotential of 250 mV (η 10 ) and small Tafel slope of 46.5 mV dec −1 in 1.0 M KOH electrolyte, and excellent rechargeable Zn-air battery performance with superior open circuit potential (1.42 eV), power density (137 mW cm −2 ) and well durability. The strong interaction and electronic coupling with prominent charge-transfer between FeNi-LDHs and V 2 C MXene endow the composite significant OER performance and structural stability, and the adsorption/desorption balance for the OER reaction pathway, eventually promoting the intrinsic activity. This work demonstrates the great promise of MXene-based nanohybrids as advanced electrocatalysts for renewable energy applications.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yang Guo,Haipeng Lu,Xian Jian
Corrosion is a major challenge for the reliable operation of ferromagnetic absorbers (FMAs) in extreme environments. Herein, we employed a one–pot method to construct SiO 2 –modified (3–Aminopropyl)trimethoxysilane (APTMS) nanocoatings on the FeNi surface, using tetraethyl orthosilicate and APTMS as precursors. The resulting APTMS/SiO 2 nanocoating (thickness: 12.0–29.3 nm) contained numerous –NH 2 and –OH functional groups, contributing to the generation of dipole polarizations. The nanocoating also improved the interfacial polarization and the impedance matching of FeNi@APTMS/SiO 2 , enhancing its microwave absorption (MA) properties. At 2.00 mm, FeNi@APTMS/SiO 2 exhibited a maximum effective absorption bandwidth of 9.23 GHz, outperforming FeNi's 8.01 GHz. Moreover, the radar cross–section value of FeNi@APTMS/SiO 2 reached as high as 27.84 dB·m 2 . Moreover, the nanocoating acted as a barrier to isolate the FeNi from the corrosive medium and prevent the formation of corrosive microcells with NaCl solutions, increasing the corrosion resistance of FeNi. The corrosion rate of FeNi@APTMS/SiO 2 was measured at 4.71 × 10 –11 m/s, which was 5.81 times lower than that of FeNi. This research highlights the advantages of APTMS/SiO 2 for MA and corrosion protection, offering valuable insights into the development of corrosion–resistant FMAs.
研究领域:
材料科学
·
腐蚀与防护
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yi-fan Zhang,Xue-wei Wang,Zi-yu Zheng,Wen-hua Zhang,Xuan Liu,Jia-qian Niu
In response to the growing demand for clean, green, and sustainable energy sources, the development of cost-effective and durable high-activity overall water splitting electrocatalysts is urgently needed. In this study, the heterogeneous structure formed by the combination of FeCoNiP and FeNi-LDH was homogeneously dispersed onto CuO nanowires generated by in-situ oxidation of copper foam as a substrate using an electrodeposition method. This multilevel structure exhibits excellent bifunctional properties as an electrode material in alkaline solutions, for the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) only 206 mV and 147 mV overpotentials are needed to achieve a current density of 100 mA cm −2 respectively. Full water electrolysis is thus enabled to take place at such a low cell voltage as 1.64 V to reach the current density of 100 mA cm −2 , which exhibits a long-term stability of 30 h. These improved electrocatalytic performances stem from the construction of multilevel structures. The X-ray photoelectron spectroscopy suggests that strong electron transfer occurs between heterogeneous structures, thus facilitating the OER and HER process. The dispersion of CuO nanowires not only increases the electrochemically active surface areas but also improves the overall hydrophilic and aerophobic properties. This work highlights the positive effect of multilevel structure in the design of more efficient electrocatalysts and provides a reference for the preparation of other low-cost, high-activity bifunctional electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Kok Bing Tan,Yueming Qiu,Yuze Li,Bin Chen,Lingxing Xia,Dongren Cai,Sajid Ali,Jiale Huang,Guowu Zhan
Although FeNi bimetal-based materials have been used for the deoxygenation of different substrates, no applicable and green support has been reported to load FeNi alloy for the deoxygenation of stearic acid. Furthermore, the activation energy of stearic acid deoxygenation on a FeNi-based catalyst is uncharted and the reaction mechanism remains ambiguous. Herein, we integrate FeNi bimetals on activated carbon (AC) as an efficient green catalyst for the deoxygenation of stearic acid into biofuels. The catalytic performance was systematically investigated with respect to Fe/Ni molar ratios and calcination temperatures. FeNi bimetals supported on AC (FeNi/AC-500) exhibited higher catalytic activity than their monometallic counterparts, indicating the importance of synergistic effect and interaction between Fe and Ni for the deoxygenation of stearic acid. Especially, Fe 1 Ni 3 /AC-900 calcined at 900 °C demonstrated the highest stearic acid conversion and linear C 17 hydrocarbon ( viz. , heptadecane and 1-heptadecene) selectivity of 99 % and 94 %, respectively, due to the optimal formation of ordered Fe 1 Ni 3 alloy phases and the lowest apparent activation energy of stearic acid pyrolysis. The distinguished performance surpassed that of noble metal and toxic catalysts in literature works. Therefore, a low-cost, green yet effective FeNi-based catalyst with low activation energy has been developed for the deoxygenation of stearic acid into biofuels.
研究领域:
催化化学
·
能源科学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Shaojie Xu,Qi Huang,Jinhang Xue,Yuandong Yang,Lujiao Mao,Shaoming Huang,Jinjie Qian
The complex oxygen evolution reaction (OER) is recognized as the most studied and explored electrochemical conversion, which plays a crucial role in energy-related applications. In this work, a series of metal–organic framework (MOF)-derived FeNi oxides from a barrel-shaped Ni-based BMM-10 precursor are conveniently obtained to show an excellent OER performance. Under mild Fe(III) etching, a type of core–shell Fe0.5-BMM-10 can be well preserved and the coordination bond of the middle frame structure is decomposed. Furthermore, the Fex-BMM-10-T series is successfully synthesized with a well-preserved morphology compared to precursors after direct oxidation. Finally, followed by initial electrochemical activation, the decomposition of FeNi oxides generates active Fe-doped nickel oxyhydroxides for efficient water oxidation. The improved OER performance stems from the high specific surface area and abundant exposed active centers, as well as the significant synergistic effect between iron and nickel, which is further verified by the theoretical calculation. This approach can be extended to precisely adjust the morphology of MOFs and their derivatives that can result in superior electrocatalytic properties in terms of energy conversion and storage applications.
研究领域:
材料科学
·
能源化学
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Hua Ma,Xiuwen Wu,Xiuli Fu,Zhijian Peng
Developing stable, highly active, and economical non-precious metal catalysts for the oxygen evolution reaction (OER) has been highly demanded in the new energy field since it can meet the industrial demands of large-scale electrocatalytic water splitting . A novel FeP/Ni 2 P/Fe 0.64 Ni 0.36 /C (FeNiP–FeNi–C) nanofiber was prepared by electrospinning and high-temperature phosphating. Notably, the good dispersion of FeP, Ni 2 P, and FeNi alloy nanoparticles in the nanocarbon fiber greatly increased the number of electroactive sites, and the synergistic effect between the FeP/Ni 2 P heterogeneous interface and FeNi alloy significantly improved the inherent activity of each site. Moreover, the carbon nanofibers enhanced the long-term durability of the catalyst by preventing the corrosion of the FeP, Ni 2 P, and FeNi alloy particles. Therefore, the optimal FeNiP–FeNi–C catalyst revealed exceptionally high OER activity, with overpotentials of 364 mV and 236 mV at 50 mA cm −2 and 10 mA cm −2 respectively, and the slope of Tafel of 61.00 mV·dec −1 . This catalyst performs significantly better than commercial RuO 2 catalysts in alkaline electrolytes . The results of this study offer a novel perspective for the mass production of non-precious metal OER high-efficiency electrocatalysts .
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 MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Jinhu Hu,Zhengguo Jiao,Xukang Han,Jiao Liu,Mingliang Ma,Jialin Jiang,Yongbo Hou,Xingyue Wang,Chao Feng,Yong Ma
The advantages of Fe, Ni metals and one-dimensional (1D) carbon materials are combined in this study using a simple method to prepare FeNi/C nanofibers for electromagnetic microwave (EM) absorption. The prepared FeNi/C nanofibers exhibit excellent EM absorption performance under dielectric/magnetic synergistic effect. At a frequency of 13.3 GHz, the minimum reflection loss (RL min ) reaches -57.15 dB, and effective absorption bandwidth (EAB) is as high as 4.0 GHz (12.5–16.5 GHz), with a thickness and filling rate of only 1.6 mm and 30 wt.%, respectively. Analysis shows that the EM absorption performance of FeNi/C nanofibers far exceeds that of single-component nanofibers and pure carbon fibers, and the excellent EM absorption performance is due to its unique microstructure and excellent electromagnetic properties. The FeNi alloy loaded on carbon nanofibers forms rich heterogeneous interfaces, and the three-dimensional (3D) conductive network composed of 1D carbon fibers increases the migration path of electrons. In addition, FeNi alloy, as an impedance regulation factor, strengthens the dielectricity of the carbon matrix while providing multidimensional magnetism, achieving impedance matching. This work is thought to contribute to the promotion of emerging absorbers by providing a novel strategy for the development of new 1D magnetic carbon-based high-performance EM 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
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 33
·25383-25391
·
IF 2.779
Zhang Cong,Liu Xiansong,Kan Xucai,Feng Shuangjiu,Zhu Yong,Yang Yujie,Zhang Zongyang
Soft magnetic composites serve in electrical applications and sustainable energy supply, the magnetic flux changes in response to changes of the applied magnetic field, with energy loss. To reduce the loss, in this paper, the soft magnetic composite Fe 50 Ni 50 powder coated with nano-SiO 2 was prepared by tetraethoxysilane sol–gel method, and the microstructure of the coating was characterized. Then, soft magnetic Fe 50 Ni 50 powder cores have been prepared, and annealed with different atmospheres. The power loss is lower when the magnetic cores were annealed in a reducing hydrogen atmosphere. The lowest power loss (1390.7 mW/cm 3 , f = 1000 kHz, B = 50 mT, 120 °C) was obtained when the cores annealed at 730 °C in H 2 atmosphere. The results show that the eddy current loss is significantly reduced by coating SiO 2 , and the power loss is reduced about 33% in high-frequency (1 MHz and 50 mT, 25 °C). From 25 to 120 °C, the power loss at 1 MHz decreases by about 33% due to the reduction of hysteresis loss and eddy current loss. The excellent properties are very applicable for the inductors of 5G technology.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2020
·
IF 7.864
Xiaotong Chen,Ting Zhang,Miao Kan,Dinggui Song,Jinping Jia,Yixin Zhao,Xufang Qian
Energy consumption and long-term stability of a cathode are two important aspects of great concern in electrocatalytic nitrate reduction. This work studied a binderless FeNi/graphitized mesoporous carbon directly formed on Ni Foam (FeNi/g-mesoC/NF, 7.3 wt % of Fe) and evaluated its electrocatalytic nitrate reduction performance. We proposed a unique structure model of FeNi/g-mesoC/NF cathode in which FeNi alloy nanoparticles were uniformly embedded in mesoporous carbon and graphitized carbon shells were coated on isolated alloy nanoparticles. Oxygen vacancies (OVs) in FeNi oxide passivating layer facilitate the conversion of NO3–-N anions on cathode. Toxic NO2–-N was almost undetected due to the synergetic effects of FeNi electrocatalysis, and the NO3–-N conversion was high in comparation with ever reported iron-based cathode. The NO3–-N conversion showed ultrahigh electrocatalytic stability during one-month-recycling test while the physiochemical properties showed negligible change for FeNi/g-mesoC/NF except the increase of OVs. The energy consumption to treat simulated underground water (50% of NO3–-N conversion) was low (0.7 kWh mol–1) for 50 mg L–1 NO3–-N. This binderless composite cathode shows great potential in electrocatalytic NO3–-N removal in underground water.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
FUEL
·
2021
·
IF 6.609
Jin Zhong,Qiang Deng,Taimei Cai,Xiang Li,Rui Gao,Jun Wang,Zheling Zeng,Guiping Dai,Shuguang Deng
Upgrading fatty acids to hydrocarbons via deoxygenation is significant for the synthesis of high-grade biofuels. Developing economic reaction conditions without using noble metal-based catalysts in the absence of hydrogen and solvent has promising application prospects. Herein, carbon-coated bimetallic FeNi nanoparticles were prepared via an in-situ carbonization-reduction strategy using double-metal cyanide at different temperatures for the deoxygenation of stearic acid. The size of the alloy core and the thickness of the carbon shell were found to be easily adjusted by varying temperature. Compared with monometallic Fe/C and Ni/C catalysts, the alloy catalyst exhibits an obvious improvement in both the conversion of stearic acid and the selectivity of heptadecane. ATR-IR spectra show that the insertion of the inert Fe element into Ni nanoparticles can promote carboxylic acid group adsorption but restrain hydrocarbon group adsorption. The synergistic effect of Fe and Ni elements leads to the promotion of direct decarboxylation of stearic acid and suppression of the C–C cracking reaction. Among different alloy catalysts studied, FeNi@C-800 exhibits the greatest catalytic performance with a 99.9% conversion of stearic acid and 76.8% selectivity for heptadecane. Furthermore, the catalyst can still maintain a stable catalytic performance against the leaching and ripening of metal through the protection afforded by the carbon shell. This work not only provides a powerful reaction system for the decarboxylation of stearic acid but also demonstrates an alternative catalyst to noble metals based on a convenient carbonization-reduction strategy.
研究领域:
化学工程
·
催化科学
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 10
·2106378
·
IF 15.153
Xianshu Qiao,Hongjun Kang,Yang Li,Kai Cui,Xin Jia,Xiaohong Wu,Wei Qin
Developing novel, efficient, and low-cost 3D FeNi-based oxygen evolution reaction (OER) catalysts with the special hydrophilic channel is still a challenge for improving hydrogen production efficiency. Herein, a novel 3D ethoxy substituted FeNi oxalate (ENWs-FeNi-C 2 O 4 ) nanowires network catalyst with hydrophilic channels is reported firstly, which shows an outstanding OER activity with a low overpotential (215 mV at 10 mA cm −2 ) and small Tafel slope (54.5 mV dec −1 ). OER catalytic mechanism indicates that the OH adsorption step and O 2 bubble diffusion step of OER reaction process can be significantly improved due to the special hydrophilic channels, and the ethoxy as an interlayer ligand not only expands the interlayer distance of layered FeNi (oxy) hydroxide true active species but modulates its electronic structure, promoting the *OOH formation step, and thus exhibiting the outstanding OER performance. This work provides a novel idea for the preparation of novel and efficient OER electro-catalysts with special 3D structures.
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 Water Process Engineering
·
2025
·
IF 6.7
Dongzheng Wang,Guo Yang,Caiyi Jiang,Xingyong Liu,Bo Xing,Min Li,Yi Wang,Fuping Zhang,Xiaolin Shi,Qian Zhou
Polyvinylidene fluoride (PVDF) membrane in-situ coupling catalytic oxidation technology holds great promise as a means to mitigate membrane fouling. However, its application is constrained by several factors, including the inherent incompatibility with inorganic nanoparticles, unsatisfactory hydrophily, and limited catalytic capacity. In this study, a novel in-situ coupling Fenton membrane catalyst with high permeability and anti-fouling capacity was processed based on highly efficient FeNi-LDHs@Cellulose. The performance evaluation exhibit that pure water flux and TOC removal efficiency increased from 556.81 L·m −2 ·h −1 , 65.42% to 665.24 L·m −2 ·h −1 , 99.03 % while rate of Irreversible contamination (Rir) decreased from 42 % to 11.7 %, respectively. After 5 cycles, the pure water flux decreased from 665.24 L·m −2 ·h −1 to 471.13 L·m −2 ·h −1 , and the TOC removal efficiency and flux recovery rate (FRR) still remained above 90%. In addition, further mechanistic insights by pollution model, extended Derjaguin-Landau-VerweyOverbeek (XDLVO), Three-dimensional fluorescence (3D-EEM) and EPR verified that anti-fouling mainly attribute to high hydrophilicity and in-situ decomposition pollutants. Meanwhile, the decomposition mechanism of pollutants and generation path of OH and 1 O 2 were proposed. This research provides insights for further improving the permeability and anti-fouling performance of PVDF membrane in the field of treatment organic wastewater by combining organic with inorganic nanoparticles.
研究领域:
环境科学
·
材料科学
✓ 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）