NANO
·
2018
·
IF 1.1
An Ye,Jiqiu Qi,Yanwei Sui,Fei Yang,Fuxiang Wei,Yezeng He,Qingkun Meng,Zhi Sun
A solid-state energy storage device has been fabricated using FeCo-selenide nanosheet arrays as positive electrode and Fe 2 O 3 nanorod as negative electrode. As an electrode material, the ternary FeCo-selenide nanosheet arrays supported by Ni foam show a highest specific capacitance of 978 F/g (specific capacity of 163 mAh/g) at 1 A/g and a superior cycle behavior of 81.2% are obtained after 5000 cycles at current density of 4 A/g. The asymmetric supercapacitor achieves the maximum energy density of 34.6 W h/kg at the power density of 759.6 W/kg. Furthermore, the superior cycling stability with 83% retention of initial capacitance after 5000 cycles further verify the practical applications of FeCo-selenide//Fe 2 O 3 asymmetric supercapacitor. Meanwhile, the LED bulb and the light board of “CUMT” are lighted by connecting several capacitors to form a series circuit.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yizhen Zhang,Lifen Liu,Bart Van der Bruggen,Michael K.H. Leung,Fenglin Yang
Berberine is a widely used antibiotic in China, its photocatalytic degradation is not well understood nor its efficient treatment reported. In this study, it is most quickly and efficiently degraded (97.9% under UV and 98.9% under visible light) using a free-standing 3D composite photo-electrode, with well dispersed Ag nanoparticles (Ag NPs) over well-aligned ZnO nanorods arrays (ZnO NAs) on Ni foam (NiF), compared to ZnO NAs/NiF, ZnO powder and P25. The composite photo-electrode was prepared by first directly growing ZnO NAs on NiF hydrothermally, followed by photo-deposition of Ag NPs, without any inactive binders or non-conductive substrates. It was characterized using scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), X-ray Diffraction (XRD), ultraviolet–visible spectrophotometry (UV–Vis) and electrochemical analysis (I-t, EIS). The highest activity of Ag NPs/ZnO NAs/NiF in degrading the target pollutant, is due to the synergy of easy pollutants diffusion and fast reaction on active sites, from suppressed electron-hole recombination by Ag NPs/ZnO NAs heterojunctions, extended light absorption by surface plasmon resonance (SPR) of Ag NPs and accelerated electron transport on the conductive macro-porous NiF. The reactive oxidizing species ( OH, O 2 − , h ± ), degradation intermediates and possible degradation pathways of berberine over Ag NPs/ZnO NAs/NiF were examined respectively. This free-standing whole piece photo-electrode with UV–visible light response, is easy to recycle and assemble, that not only degrades pollutant, but also generates electricity as photo-anode in a photo-catalytic fuel cell reactor using carbon fiber cloth as cathode.
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高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
JunRan Jia,MengKe Zhai,JingJing Lv,BaoXun Zhao,HongBin Du,JunJie Zhu
Non-noble-metal electrocatalysts for water splitting hold great promises for developing sustainable and clean energy sources. Herein, a highly efficient bifunctional electrode consisting of Ni-doped molybdenum nitride nanorods on Ni foam is prepared through topotactic transformation of NiMoO4 nanorods that are in situ hydrothermally grown on Ni foam. The electrode not only contains rich, accessible, electrochemically active sites but also possesses extraordinary chemical stability. It exhibits excellent hydrogen evolution reaction and oxygen evolution reaction performance in 1.0 M KOH with low overpotentials of 15 and 218 mV, respectively, at a current density of 10 mA cm–2, superior to the commercial benchmark materials Pt/C and RuO2 under the same condition. A simple water electrolyzer using the obtained electrode as both the anode and cathode needs a very low cell potential of 1.49 V to reach a current density of 10 mA cm–2 and maintains stability for 110 h without degradation. The excellent performance of the electrode could be attributed to the formation of highly conductive, corrosion- and oxidation-resistant metal nitrides and the synergetic effect between intimately interconnected, electrochemically active nickel molybdenum nitride and Ni or NiO nanoparticles. This study shows that the use of transition metal nitrides in combination of nanostructured heterojunctions of multiple active components enables one to develop highly stable and efficient water electrolyzers without precious metals. The preparative strategy used in this work could be applied to devise new electrocatalysts.
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PubMed
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2017
·Vol. 35
·期 4
·405-409
·
IF 1.852
Xiandong Dou,Weijun Liu,Qing Liu,Zhiqiang Niu
An electrocatalyst of nickel phosphide (Ni 2 P) nanorod arrays vertically grown on Ni foam composite (NNFC) was prepared successfully using NaH 2 PO 2 as phosphorus source by means of a facile method of in situ phosphorization of Ni foam. The as-prepared NNFC exhibits excellent HER performance with an onset overpotential of 100 mV, a small Tafel slope of only 55 mV/dec, and a low overpotential involving 200 mV at a current density of 10 mA•cm −2 . Furthermore, the electrocatalyst was also demonstrated to possess high stability with a neglectable decrease in activity even after durability test for 25 h.
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JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Xiaotian Xie,Yi Xu,Fanshu Yuan,Qi Wu,Pengchao Liu,Jie Liu,Dongtian Wang,Tingting Lv,Qianli Zhang
The strategic design of in situ grown nanomaterials with microdendrite morphology to enhance supercapacitor performance has become a significant research focus in the field of renewable energy storage. This study explores an innovative one-step microwave technique for producing different NiSe microdendrite arrays that are grown in situ on Ni foam (NF) substrates. In this process, Ni foam serves dual roles as a Ni source and a structural framework. At a current density of 0.6 A g −1 , NiSe microdendrite arrays that were synthesized demonstrate a capacity of 261.1 mAh·g −1 , surpassing that of the majority of traditional pseudocapacitive materials. Furthermore, the effect of the solvent, Se powder dosage, and microwave reaction parameters on the micromorphology and electrochemical properties of NiSe is comprehensively examined. Furthermore, the supercapacitor device featuring a positive electrode composed of NiSe microdendrite arrays and a negative electrode constructed from activated carbon (AC) exhibits a broad voltage range of 1.7 V. It also achieves a peak energy density of 50.29 Wh·Kg −1 at power density of 847.98 W kg −1 , suggesting a promising application prospect.
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Nanomaterials
·
2024
·Vol. 14
·期 17
·1445
·
IF 4.4
Jingchao Zhang,Yingping Bu,Zhuoyan Li,Ting Yang,Naihui Zhao,Guanghui Wu,Fujing Zhao,Renchun Zhang,Daojun Zhang
Oxygen evolution reaction (OER) is a critical half-reaction in electrochemical overall water splitting and metal–air battery fields; however, the exploitation of the high activity of non-noble metal electrocatalysts to promote the intrinsic slow kinetics of OER is a vital and urgent research topic. Herein, Fe-doped Ni3S2arrays were derived from MOF precursors and directly grown on nickel foam via the traditional solvothermal way. The arrays integrated into nickel foam can be used as self-supported electrodes directly without any adhesive. Due to the synergistic effect of Fe and Ni elements in the Ni3S2structure, the optimized Fe2.3%-Ni3S2/NF electrode delivers excellent OER activity in an alkaline medium. The optimized electrode only requires a small overpotential of 233 mV to reach the current density of 10 mA cm−2, and the catalytic activity of the electrode can surpass several related electrodes reported in the literature. In addition, the long-term stability of the Fe2.3%-Ni3S2/NF electrode showed no significant attenuation after 12 h of testing at a current density of 50 mA cm−2. The introduction of Fe ions could modulate the electrical conductivity and morphology of the Ni3S2structure and thus provide a high electrochemically active area, fast reaction sites, and charge transfer rate for OER activity.
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PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Hongda Zhang,Miao Pang,Weiyao Yang,Le Sang,Zhiping Zhao
A micro-nano coating with controllable wettability is constructed on Ni foam using the dipping coating method, incorporating organic polydopamine (PDA) and 1H,1H,2H,2H-perfluorodecyltriethoxysilane, and inorganic SiO 2 nanoparticles. PDA has the properties of controlling wettability, strong adhesion, and abundant grafting sites. The water contact angle (WCA) of modified Ni foam is controlled in the range of 0–151.5°. The stability measurement displays that modified Ni foam packings exhibit excellent acid and alkali resistance as well as mechanical stability to fluid erosion under microenvironment. Compared with non-modified (131.5°) and superhydrophilic (0°) Ni foam packings, the maximum ratios of mass transfer enhancement for the superhydrophobic (151.5°) Ni foam packing are 35.6 % and 160.2 %, respectively. Empirical correlations of the gas–liquid mass transfer coefficient and friction factor are established considering the effect of the WCA, and errors between predicted values and experimental values are within ± 15 % and ± 10 %, respectively.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Dengtai Wang,Luxiang Jiang,Mingjiao Tian,Jing Liu,Yi Zhan,Xiaoxiao Li,Zuwu Wang,Chi He
Developing cost-effective monolith catalyst with superior low-temperature activity is critical for oxidative efficacious removal of industrial volatile organic compounds (VOCs). However, the complexity of the industrial flue gas conditions demands the need for high moisture tolerance, which is challenging. Herein, CoMn–Metal Organic Framework (CoMn–MOF) was in situ grown on Ni foam (NiF) at room temperature to synthesize the cost-effective monolith catalyst. The optimized catalyst, Co1Mn1/NiF, exhibited excellent performance in toluene oxidation ( T 90 = 239 °C) due to the substitution of manganese into the cobalt lattice. This substitution weakened the Co–O bond strength, creating more oxygen vacancies and increasing the active oxygen species content. Additionally, experimentally and computationally evidence revealed that the mutual inhibiting effect of three typical aromatic hydrocarbons (benzene, toluene and m–xylene) over the Co1Mn1/NiF catalyst was attributed to the competitive adsorption occurring on the active site. Furthermore, the Co1Mn1/NiF catalyst also presents outstanding water resistance, particularly at a concentration of 3 vol%, where the activity is even enhanced. This was attributed to the lower water adsorption and dissociation energy derived from the interaction between the bimetals. Results demonstrate that the dissociation of water vapor enables more reactive oxygen species to participate in the reaction which reduces the formation of intermediates and facilitates the reaction. This investigation provides new insights into the preparation of oxygen vacancy–rich monolith catalysts with high water resistance for practical applications.
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PubMed
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 21
·12134-12145
·
IF 3.049
Wenyi Wu,Fengjuan Miao,Bairui Tao,Yu Zang,Lei Zhu,Cuiping Shi,Paul K. Chu
A self-powered nonenzymatic glucose sensor electrode boasts the advantages of both a glucose sensor and fuel cell. Herein, an electrode composed of ZnO–graphene hybrid materials on nickel foam (NF) is prepared by electrodeposition of Pd NPs. The electrode is characterized systematically and the dependence of electrocatalytic oxidation of glucose on the concentrations of KOH and glucose, temperature, and potential limit in the anodic direction is investigated. The Pd/NF-ZnO–G electrode shows high catalytic activity, sensitivity, stability, and selectivity in glucose detection, as exemplified by an electrocatalytic glucose oxidation current of 222.2 mA cm−2 under alkaline conditions, high linearity in the glucose concentration range from 5 μM to 6 mM (R2 = 0.98), and high sensitivity of 129.44 μA mM−1−1 cm−2. The Pd/NF-ZnO–G electrode which exhibits superior electrocatalytic activity under alkaline conditions has large potential in nonenzymatic glucose sensing and direct glucose fuel cells and is suitable for miniaturized self-powered nonenzymatic glucose sensing.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Yumeng Lian,Yi Wang,Dun Zhang,Likun Xu
Developing a stable and reusable material for antibacterial application in an enzyme-like system is still a challenge. Herein, Mn–Co–S–Se (MnCo 2 S x Se 4–x )/Ni foam (NF) are synthesized by introducing S 2– and Se 2– in MnCo 2 O 4 /NF with a facile hydrothermal approach. With the different molar ratios of S/Se, the surface morphology of MnCo 2 S x Se 4–x /NF shows different growth and the catalytic activity also presents regular changes. MnCo 2 S 3.1 Se 0.9 /NF possesses a high enzyme-like ability with higher V max than natural horseradish peroxidase . Due to the outstanding peroxidase-like activity, MnCo 2 S 3.1 Se 0.9 /NF also exhibits broad-spectrum bactericidal performance towards Escherichia coli and Staphylococcus aureus which stems from the formation of ·O 2 – from H 2 O 2 . In the reutilization experiment, the enzyme-like activity keeps a stable value after 25 cyclic tests and the bactericidal performance is still stable after 10 cyclic tests, proving that MnCo 2 S 3.1 Se 0.9 /NF possesses relative stability and reusability. This research showed the great prospect of new energy and environmental catalysis.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Xu Yang,Rui Qiu,Ming-Jian Lan,Gang Chen,Wei Xu,Yu Shen
Designing the efficient, low-cost and stable electrocatalyst is of great significance for storage and conversion of the renewable energy to hydrogen. Herein, the binder-free Ni–Fe–S electrocatalysts were directly electrodeposited on Ni foam, which exhibited the excellent hydrogen evolution reaction performance with the overpotential of 51.4 mV at the current density of 10 mA cm −2 . Based on the analysis and results of as-synthesized Ni, Ni–Fe and Ni–S, the boosted electrocatalytic activity can be attributed to the composite effect between Ni and the introduced Fe and S. Additionally, the Ni–Fe–S electrocatalysts also displayed the low cell voltage (1.59 V at 10 mA cm −2 ), remarkable durability and high Faraday efficiency in overall water electrocatalysis . Moreover, the water electrolysis device with Ni–Fe–S bi-electrodes can be driven by a small wind power generation and producing 4 mL H 2 in 39 min, indicating the prepared Ni–Fe–S electrocatalyst has the great potentials in producing hydrogen via renewable energy.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Yanwei Sui
Herein, we design and construct the hierarchical NiCo 2 O 4 @Ni 0.85 Se core-shell architecture directly growing on Ni foam as advanced materials for supercapacitor . The composite materials deliver excellent electrochemical performance with a high specific capacitance of 1454 F/g and superior cycle life with 88.5% retention after 10000 cycles, which ascribed to the synergistic effect of pure NiCo 2 O 4 and Ni 0.85 Se. Furthermore, the NiCo 2 O 4 @Ni 0.85 Se//AC asymmetric supercapacitor were fabricated with a highest energy density of 29.3 W h kg −1 at power density of 799 W kg −1 . It is expected that the NiCo 2 O 4 @Ni 0.85 Se will be a kind of promising electrode materials for supercapacitor.
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高影响因子
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