Data in Brief
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2015
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IF 0
Xinghao Lin,Yanming Zhao,Youzhong Dong,Quan Kuang
This data article contains the synthesis and structure information of a new Fe-base sodium metaphosphate compound, which is related to the research article entitled ‘Synthesis, structural, magnetic and sodium deinsertion/insertion properties of a sodium ferrous metaphosphate, NaFe(PO 3 ) 3 ’ by Lin et al. [1] . The research article has reported a new Fe-base metaphosphate compound NaFe(PO 3 ) 3 , which is discovered during the exploration of the new potential electrode materials for sodium-ion batteries. In this data article, the synthesized process of this metaphosphate compound and the morphology of the obtained sample will be provided. The high-power XRD Rietveld refinement is applied to determine the crystal structure of this metaphosphate compound and the refinement result including the main refinement parameters, atomic coordinate and some important lattace parameters are stored in the cif file. Also, the refined structure has be evaluated by checkcif report and the result is also provided as the supplementary materials.
研究领域:
材料科学
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无机化学
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储能
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晶体学
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电化学
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DOI
CHEMPHYSCHEM
·
2022
·Vol. 24
·期 7
·e202200505
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IF 3.52
Xujun Ma,Donghui Wang,Jianan Wu,Bin Zhao,Feng Chen
Graphical Fe 3+ doping was utilized to promote the formation of oxygen vacancies and improve the interaction between TiO 2 and atomic Pt. Single Pt atoms anchored on the oxygen vacancy sites of Fe−TiO 2 effectively modify the local energy band structure of TiO 2 , and thus significantly boost the catalytic performance of either the intrinsic or the sensitized photocatalytic process for Pt/Fe−TiO 2 . Single atomic site catalysts display the maximal atom-utilization efficiency, unique structural properties, and remarkable enhancements on catalytic activity. Herein, single Pt atoms loaded Fe−TiO 2 catalysts were prepared. Fe 3+ doping leads to the formation of oxygen vacancies and improve the interaction between TiO 2 and Pt. Single Pt atoms are thus anchored and effectively modify the local energy band structure of TiO 2 . The optimized local band structures improve the intrinsic photoexcitation of Pt/Fe−TiO 2 , promote the separation of photogenerated carriers, and extend the lifetime of photogenerated carriers. Meanwhile, the electrons transfer from the excited dyes to the conduction band edge of Pt/Fe−TiO 2 is also facilitated due to the shift-down of the conduction band edge. Therefore, with the increase of the Pt content (till up to 0.6 wt%), the photocatalytic performance of Pt/ Fe−TiO 2 with the confined single Pt atoms is significantly boosted in either the intrinsic or the sensitized photocatalytic process.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Mengxiao Zhong,Weimo Li,Junjie Chen,Siyu Ren,Ruikai Qi,Ce Wang,Xiaofeng Lu
Designing high-performance and cost-effective oxygen-evolution electrocatalysts is highly required toward sustainable water electrolysis. Surface reconstruction is a promising strategy to realize the improvement of the oxygen-evolution reaction (OER) performance of transition metal-based electrocatalysts. Herein, we present a simple electrospinning-post treatment route to construct a novel Fe(III)/NiS electrocatalyst and investigate the key role of the surface reconstruction to significantly promote the OER performance. Owing to the unique tubular morphology and the formation of the highly efficient electrochemical active species of Ni(Fe)OOH during OER process, the prepared Fe(III)/NiS nanotubular catalyst exhibits a low overpotential of 264 mV at 10 mA cm −2 , superior to the benchmark RuO 2 and many other metal sulfide electrocatalysts. Furthermore, the catalyst also presents an excellent durability with no distinct activity reduction for over 70 h. This study offers a reliable surface reconstruction way to fabricate high-efficiency and outstanding durable OER electrocatalyst, enabling it promising prospect for water electrolysis with a reduced energy consumption.
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FUEL PROCESSING TECHNOLOGY
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2022
·
IF 8.129
Hao Zhu,Fei Wang,Jianchun Jiang,Zeng Zhang,Yuchan Du,Junfeng Feng,Xiaoxiang Jiang
In order to deal with the deficiency of active sites in Ni catalyst, Ni Fe nanosheet (Ni-Fe/Al 2 O 3 -NS) catalyst was synthesized by using Ni-Fe-Al LDH as the precursor. The catalyst was further utilized in the lipid hydrotreatment for green diesel production. With a lamellar structure and large Ni loading (more than 60%), the Ni-Fe/Al 2 O 3 -NS catalyst possessed abundant Ni sties with high dispersion, large surface area, and strong acidity. Moreover, in Ni-Fe/Al 2 O 3 -NS the highly active Ni 3 Fe phase was formed, which promoted the decarbonylation route in hydrotreatment. The Ni-Fe/Al 2 O 3 -NS catalyst achieved 98.7% conversion with 98.1% alkane yield in oleic acid hydrotreatment under very mild conditions (220 °C, 2 MPa of hydrogen pressure, 3 h). The catalytic performance of Ni-Fe/Al 2 O 3 -NS was much higher than traditional Ni-Fe/Al 2 O 3 and other catalysts reported in current related studies.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Xiulan Weng,Huijing Ma,Gary Owens,Zuliang Chen
Recently, bimetallic Fe-Pd nanoparticles were integrated with metal organic frameworks (MOFs) to produce a new composite catalyst with significant potential for organic contaminant removal due to enhanced adsorption and reduction. Here, 85.9 % of 2,4-dichlorophenol (2,4-DCP) was successfully removed from aqueous solution within 120 min when using a zinc-based zeolitic imidazolate framework (ZIF-8) embedded with Fe-Pd (Fe-Pd@ZIF-8). In comparison only 77.4 and 48.3 % was removed when using ZIF-8 or Fe-Pd alone. Thus, to better understand the function of composite components (ZIF-8 and Fe-Pd) in the removal of 2,4-DCP, and the specific removal mechanism involved, Fe-Pd@ZIF-8 was characterized before and after exposure to 2,4-DCP. This comparison revealed that 2,4-DCP was adsorbed onto the surface of the composite during exposure. Moreover, while ZIF-8 maintained stability following the removal of 2,4-DCP, Fe 0 was partially oxidized and Pd functioned as a catalyst in the removal process. Furthermore, kinetic studies demonstrated that the initial adsorption of 2,4-DCP conformed to a pseudo-second-order model and the subsequent reduction conformed to a pseudo-first-order model, whereas isothermal adsorption best fit the Freundlich adsorption model. This observation suggested that removal mechanism of 2,4-DCP involved both adsorption and dechlorination. Finally, Fe-Pd@ZIF-8 was applied to practically remove 2,4-DCP from wastewater, showing a 74.4 % removal efficiency which indicated that the composite was a potential new nanomaterial for practically removing organic contaminants from wastewater.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Junshuang Zhou,Ying Bian,Zhuoran Hao,Kuo Wei,Jiajia Xiao,Jing Wang,Yuanzhe Wang,Huiyang Gou,Faming Gao
Inhibiting the chlorine evolution reaction (CER) is of great significance for the design and development of oxygen evolution catalysts with high current density for seawater electrolysis. The KOH concentration plays a very important role in controlling the potential of chlorine evolution in seawater electrolysis. However, the effect of its concentration, especially the high one (for example, >1 M), on the OER activity of different catalysts has not been studied so far. Here, we found that the KOH concentration has different linear effects on the OER activity for different catalysts, and we first propose a novel concept named concentration activity coefficient (CAC) to express the linear relationship between the OER activity of the catalyst and the KOH concentration in seawater electrolysis. Based on CAC, we report a Co S-NiFe 2 O 4 catalyst with ultrahigh oxygen evolution activity in the 3 M KOH + seawater. This is due to the strong electronic interaction between Co and S-NiFe 2 O 4 . At current densities of 500 mA cm −2 and 1000 mA cm −2 , the overpotentials of Co S-NiFe 2 O 4 are 270 mV, and 287 mV, respectively, which are much lower than those of the existing electrocatalysts . More promising, the new catalysts also showed a splendid Tafel slope of 18.8 mV dec −1 and a long catalytic lifetime in concentrated alkaline electrolyte . Our findings provide a better understanding of the correlation between the KOH concentration and the OER activity and open new avenues for design and development of electrocatalysts for the next generation of high OER activity in seawater electrolysis.
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Materials
·
2022
·Vol. 15
·期 23
·8380
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IF 3.748
Chen Chu,Jinqiong Tang,Zhiyang Zhao,Yong Kong,Xiaodong Shen
Aerogels have interconnected networks and preeminent pore structures. When used as the catalysts for oxygen reduction reaction (ORR), they can facilitate the mass transfer and expose more active sites. Here, we synthesized the Fe-doped titanium oxide-based aerogels (TA/Fes) by the sol–gel method combined with thermal treatment. The specific surface areas of the TA/Fes ranged from 475 to 774 m2·g−1, and the pore volumes varied from 0.96 to 1.72 cm3·g−1. The doping effect of the Fe ions and the oxygen vacancies in anatase enhance the electrical conductivity, leading to the low Rct (313.3–828.2 Ω). All samples showed excellent stability (2.0–4.5 mV) and 4e−pathway. The limiting current density of TA/Fe3 reached 5.34 mA·cm−2, which was comparable to that of commercial Pt/C. The preparation method is inspiring and the as-prepared aerogel catalysts have potential in promoting the scale of fuel cells.Keywords:TiO2aerogel;Fe ion doping;oxygen vacancy;pore structure;catalysis;ORR
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高影响因子
Colloid and Interface Science Communications
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2023
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IF 4.5
Chengyang Ban,Hanzhu Shi,Qiong Ding,Bin Wu,Ru Xia,Jiasheng Qian,Ming Cao
In this study, Fe/ABTS/PVP nanocomplexes (named FAPs) as photothermal-reinforced catalytic antibacterial agents were prepared using the coordination-induced assembly of Fe (III), 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), and polyvinylpyrrolidone (PVP). The redox pairs of Fe(II)/Fe(III) in FAPs can catalyze the H 2 O 2 to hydroxyl radicals (•OH) through Fenton reactions, thereby killing effect on bacteria. The photothermal effect of ABTS •+ in FAPs stimulated by near infrared (NIR) irradiation can further improve the catalytic effect, thereby generating more •OH and achieving better antibacterial activity. What's more, the reduction reaction between glutathione (GSH) and ABTS •+ results in the depletion of the GSH level, the redox pair of Fe(II)/Fe(III) is also beneficial in the consumption of GSH. This dual depletion of GSH further expands the intracellular oxidative stress. Thus, the integrated function of photothermal effect, catalytic property, and dual depletion of GSH by FAPs provides a new strategy for fighting against bacterial infections.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Peng Chu,Hailei Zhao,Jie Wang,Hongliang Xie,Chongqi Han,Zhao Yang
Negative current collectors play vital roles in the electrochemical performance of liquid metal batteries (LMBs). Employing a three-dimensional (3D) current collector is an effective approach to host molten lithium and reduce the effective current density. The Ni-Fe foam is a frequently used 3D current collector for the negative electrode. However, the corrosion of molten lithium towards the Ni-Fe foam skeleton devastates the 3D structure of the current collector and so deteriorates seriously the electrochemical performance of LMB. To enhance the corrosion resistivity, herein, the graphite layer coated Ni-Fe foam (Graphite@Ni-Fe) is prepared by the chemical vapor deposition method. The prepared scaly-like graphite layer plays a bifunctional role in chemistry, preventing corrosion as an effective barrier and improving remarkably the surface lithiophilicity of Ni-Fe foam. The assembled Li||Bi batteries with Graphite@Ni-Fe foam as negative current collector exhibit stable cycling performance with capacity retention of 98.10% and high Coulombic efficiencies over 98.3% at 0.4 A cm −2 over 100 cycles at 500 °C. More importantly, outstanding rate capability is achieved and almost no capacity degradation is observed upon current density change from 0.2 to 2.0 A cm −2 . This work highlights the importance of the lithiophilicity and the corrosion resistance ability of the negative current collectors for LMBs.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Liangyu Tong,Yunpeng Liu,Chenyu Song,Yuqing Zhang,Sanjay S. Latthe,Shanhu Liu,Ruimin Xing
Hollow hybrid heterostructures are regarded to be promising materials as bifunctional electrocatalysts for highly efficient water electrolysis due to their intriguing morphological features and remarkable electrochemical properties . Herein, with FeNi-PBA as both a precursor and morphological template, we demonstrate the rational construct of cost-effective (Fe,Ni)S 2 @MoS 2 /NiS 2 hollow hybrid heterostructures as bifunctional electrocatalysts for alkaline overall water splitting. Microstructural analysis shows that the hybrid is a kind of hierarchical heterostructure composed of MoS 2 /NiS 2 nanosheets/nanoparticles in situ grown on hollow (Fe,Ni)S 2 nanocubes with abundant heterointerfaces, which effectively maximizes the electrochemical active sites to the accessible electrolyte ions , leading to the promoted charge transfer. As expected, the hybrid shows remarkable alkaline electrocatalytic performance, such as hydrogen evolution overpotential of 176 mV and oxygen evolution overpotential of 342 mV at 50 mA cm −2 , as well a cell voltage of 1.65 V at 20 mA cm −2 . Moreover, the stability and durability are greatly enhanced under harsh electrochemical conditions. This study opens a new venue for developing earth-abundant bifunctional electrocatalysts with hollow hybrid heterostructures for alkaline water electrolysis in the future.
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SENSORS AND ACTUATORS B-CHEMICAL
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2022
·
IF 9.221
Linlin Zhang,Jie Wang,Chenglong Zhao,Feijin Zhou,Cheng Yao,Chan Song
The nanozymes-based sensing platforms have been attracted in recent years due to their outstanding performances in the practical applications. In this work, the magnetic Fe nanoparticles (NPs) with peroxidase-like activity was developed for the fast detection of glutathione (GSH). The Fe NPs were facilely prepared through the reduction of iron trichlorrde hexahydrate (FeCl 3 ‧6H 2 O) by sodium borohydride (NaBH 4 ) at room temperature , exhibiting a merit of simplicity. Significantly, the achieved Fe NPs have high peroxidase-like catalytic activity . At the room temperature, the colorimetric substrates such as 3,3′,5,5′-tetramethylbenzidine (TMB) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) can be rapidly oxidized by Fe NPs with the help of H 2 O 2 . After incubated for just 30 s, the catalytic system could achieve a colored solution. Thus, the Fe NPs-based sensing systems can be employed in the development of the colorimetric biosensors with the naked-eye detection.
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ACS Applied Nano Materials
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2022
·
IF 6.14
Zhifeng He,Yuchen Jiang,Xin Cui,Zeyi Liu,Xin Meng,Jiafeng Wan,Fangwei Ma
Recently, molybdenum (Mo)-based catalysts have been proved to be effective NRR catalysts due to the high affinity of nitrogen to Mo. The design of a heterostructure and the introduction of defects, such as vacancies and heteroatom doping, are effective means to regulate the microstructure of catalysts and further improve their electrocatalytic N2 into NH3 performance. In this paper, VS-Fe-doped 1T/2H mixed-phase MoS2/C (VS means sulfur vacancies) heterostructure sphere-like nanoflowers with rich sulfur vacancies are prepared through a pectin-assisted hydrothermal reaction, followed by calcination and treatment with NaBH4 solution. VS-Fe-MoS2/C exhibits good electrocatalytic NRR performance with a high ammonia yield rate of 17.8 ± 0.7 μg h–1 mg–1 at −0.5 V versus reversible hydrogen electrode (vs RHE) and a Faraday efficiency (FE) of 9.2% at −0.3 V (vs RHE) under ambient conditions. Introducing sulfur vacancies, iron doping, and preparing 2H-phase MoS2 have greatly improved the performance of electrocatalytic nitrogen reduction to ammonia.
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