ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Yaohua Yang,Kai Yan,Jingdong Zhang
A Ni(OH) 2 /TiO 2 photoanode possessing high photoelectrocatalytic activity toward glucose oxidation driven by visible light was fabricated. The results indicated that deposition of Ni(OH) 2 on TiO 2 film electrode could remarkably promote the catalytic oxidation of glucose under visible light illumination. By applying a low voltage, the Ni(OH) 2 /TiO 2 electrode showed a linear photoelectrochemical response to glucose in the concentration range from 0.5 μM to 20 μM. Furthermore, the high photoelectrocatalytic activity of Ni(OH) 2 /TiO 2 electrode toward glucose oxidation was utilized to construct a glucose-air photofuel cell, which generated electrical signal responding to glucose concentration from 5 μM to 100 μM, without using external electrical power supply. Thus, dual non-enzymatic glucose sensors based on photocatalytic oxidation of glucose on the Ni(OH) 2 /TiO 2 electrode under visible light illumination were demonstrated.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Linjia Li,Yiran Zhang,Jiaqi Feng,Shu Zhao,Ke Li,Zhen Huang,He Lin
Integrated carbon capture and utilization (ICCU), based on dual-function materials (DFMs), is an emerging technology for carbon dioxide (CO2) emission control. DFMs composed of Ni–Ca–Al systems are favored owing to their affordability. However, their performance needs to be further improved. In this study, Ni/AlCaOx DFMs are prepared by one pot-impregnation method, reaching an adsorbing capacity of 1796 μmol CO2/gDFM and a production of 1790 μmol CH4/gDFM after ten cycles at 450 °C. The Ni–Ca–Al synergistic effect was investigated to understand the good performance of DFMs: during H2 pretreatment, Ca can weaken the strong interaction of Al–Ni and promote the reduction of NiO by facilitating Ni to gain electrons from H2, where Al may act as an intermediate carrier for electron transfer. In the carbonation process, Al modulates the synergistic interaction between Ca and Ni by regulating the spacing and distribution of catalytic and adsorption sites to improve the Ni/AlCaOx cycling performance. Besides, oxygen vacancies can also enhance the DFMs’ carbon capture performance. During the methanation process, Ni reduces the decomposition temperature of the carbonate formed at strongly basic sites, favoring the methanation reaction.
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SYNTHETIC METALS
·
2019
·
IF 2.87
Liang Zhang,Jishun Liu,Xiaolei Peng,Qiang Cui,Dong He,Chun Zhao,Hui Suo
Herein, an electrochemical ammonia sensor based on Ni foam-supported silver/polypyrrole and platinum nanoparticles electrode (Pt-Ag/PPy-NiF) was designed and constructed. The Ag/PPy layer was firstly grown on Ni foam surface via oxidation reduction reaction, and then Pt nanoparticles with great electrocatalytic activity were electrodeposited on the surface of Ag/PPy-NiF via cyclic voltammetry methodology. Electrochemical experiments demonstrated that the Pt-Ag/PPy-NiF electrode showed a great electrocatalytic ability of the oxidation of ammonia and an electrochemical aqueous ammonia sensor was proposed accordingly. The ammonia sensor showed a sensitivity of 0.089 mA μM −1 , a detection limit of 37 nM (S/N = 3) and a wide linear range, as well as presenting a good anti-interference capability against many common ions in water. These excellent performances can be mainly attributed to large specific surface of electrode and great electrocatalytic ability of Pt nanoparticles.
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ACS Applied Nano Materials
·
2021
·
IF 5.097
Zewei Jia,Shangbo Ning,Yuxin Tong,Xin Chen,Huilin Hu,Lequan Liu,Jinhua Ye,Defa Wang
Photothermal reverse water gas shift reaction is one of the promising methods to palliate global energy and environmental issues. Searching for catalysts with high activity and CO selectivity for CO2 conversion has been attracting extensive attention. In this work, Ni nanoparticle-loaded N-doped CeO2 (Ni/N-CeO2) composite catalysts were synthesized using a three-step method. Under light irradiation, the optimal Ni/N5.0-CeO2 exhibited a CO yield rate of 20.9 mmol·gcat–1·h–1 with almost 100% of CO selectivity via photothermal CO2 reduction. As a comparison, Ni/CeO2, without nitrogen doping, showed a high CH4 selectivity. The strong light absorption of Ni/N5.0-CeO2 mainly by loading of Ni nanoparticles and the enhanced adsorption/activation of CO2 molecules due to increased oxygen vacancies in N5.0-CeO2 by N-doping were supposed to account for the excellent catalytic performances. The doping of nitrogen was of particular importance for the formation of N–H bonds, which could modulate the reaction pathway for promoting the reduction of CO2 toward CO while suppressing the undesirable CO2 methanation process.
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Nanoscale Advances
·
2021
·Vol. 3
·期 8
·2280-2286
·
IF 4.553
Honglei Wang,Shengyang Tao
Rational optimization of the surface electronic states and physical structures of non-noble metal nanomaterials is essential to improve their electrocatalytic performance. Herein, we report a facile dual-regulation strategy to fabricate NiFeP/Ni (P-NiFeP/Ni) porous nanoflowers, which involves Fe-doping and creating pores on nanosheets. The as-prepared P-NiFeP/Ni has a hierarchically porous surface, which exposes more electrochemically active sites and dramatically enhances the electron transfer rate. Thus, it exhibits excellent catalytic activity in both anodic hydrazine oxidation reaction (HzOR) and cathodic hydrogen evolution reaction (HER). Interestingly, the coupled electrolysis cell only offers a potential of 0.162 V at 10 mA cm−2 to enable HzOR boosted H2 evolution, highlighting an energy-saving hydrogen evolution strategy.
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ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Weiji Dai,Ye Pan,Kai Ren,Yin-an Zhu,Tao Lu
Highly active and low-cost electrocatalysts toward oxygen evolution reaction are urgently-needed in the field of energy conversion. Previous works have demonstrated that pyrite-phase sulfides are promising electrocatalysts for oxygen evolution reaction, however the true active materials are still undetermined. Here, we report heteroatom Ni alloying into FeS 2 crystal via a facile ball-milling reaction method to enhance electrocatalytic performances of pyrite-phase FeS 2 . A series of (Fe 1-x Ni x )S 2 nanocrystalline materials are synthesized to systematically investigate the effects of Ni alloying on FeS 2 toward oxygen evolution reaction electrocatalysis . To achieve an current density of 10 mA cm −2 , the (Fe 0.5 Ni 0.5 )S 2 at carbon fiber paper electrode requires an overpotential as low as 241 mV with a Tafel slope of 51.8 mV dec −1 in 1 M KOH solution. Further investigations reveal that the derived hybrids of Fe 3 O 4 nanoflakes and nanoporous Ni doped FeOOH are true active materials for the (Fe 0.5 Ni 0.5 )S 2 under oxygen evolution reaction conditions. This study not only reveals the true active materials of the heteroatom alloyed bimetallic sulfides, but also provides a facile strategy to regulate the formation of active materials for enhanced oxygen evolution catalysis.
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Wenlei Yin,Jiayan Yang,Keyang Zhao,Anyang Cui,Jiaoyan Zhou,Wei Tian,Wenwu Li,Zhigao Hu,Junhao Chu
Photodetectors based on p-type metal oxides are still a challenge for optoelectronic device applications. Many effects have been paid to improve their performance and expand their detection range. Here, high-quality Cu1–xNixO (x = 0, 0.2, and 0.4) film photodetectors were prepared by a solution process. The crystal quality, morphology, and grain size of Cu1–xNixO films can be modulated by Ni doping. Among the photodetectors, the Cu0.8Ni0.2O photodetector shows the maximum photocurrent value (6 × 10–7 A) under a 635 nm laser illumination. High responsivity (26.46 A/W) and external quantum efficiency (5176%) are also achieved for the Cu0.8Ni0.2O photodetector. This is because the Cu0.8Ni0.2O photosensitive layer exhibits high photoconductivity, low surface states, and high crystallization after 20% Ni doping. Compared to the other photodetectors, the Cu0.8Ni0.2O photodetector exhibits the optimal response in the near-infrared region, owing to the high absorption coefficient. These findings provide a route to fabricate high-performance and wide-detection range p-type metal oxide photodetectors.
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AICHE JOURNAL
·
2019
·Vol. 65
·期 8
·e16616
·
IF 3.463
Daofei Lv,Jiayu Chen,Yongwei Chen,Zewei Liu,Yuzhi Xu,Chongxiong Duan,Houxiao Wu,Ying Wu,Jing Xiao,Hongxia Xi,Zhong Li,Qibin Xia
Metal–organic frameworks (MOFs) combined with selective adsorption capacity of ethane over ethylene and good moisture stability are highly urged by adsorption industrial community. Here, the moisture stability mechanism of Zr-bptc, UiO-66, PCN-245, and Ni(bdc)(ted) 0.5 were investigated by moisture stability experiments, and computational simulation of metal node-linker breaking energy caused by water. Results show that the moisture stability follows the order of Zr-bptc > UiO-66 > PCN-245 > Ni(bdc)(ted) 0.5 . The different moisture stability for these MOFs is likely attributed to the bond strength between metal center and ligands, the coordination number of metal center, the hydrophobicity of framework, as well as the degree of interpenetrated framework. Additionally, comparing with ethylene-selective MOFs, ethane-selective MOFs have fewer coordinatively unsaturated metal sites. Breakthrough experiments indicated that Zr-bptc is the promising material for ethane/ethylene separation.
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Catalysts
·
2016
·Vol. 6
·期 9
·134
·
IF 2.964
Songbai Qiu,Ying Xu,Yujing Weng,Longlong Ma,Tiejun Wang
A series of MCM-41 supported Ni catalysts with high metal dispersion was successfully synthesized by simple co-impregnation using proper ethylene glycol (EG). The acquired Ni-based catalysts performed the outstanding hydrogenolysis activity of guaiacol. The effects of the synthesis parameters including drying temperature, calcination temperature, and metal loading on the physical properties of NiO nanoparticles were investigated through the use of X-ray diffraction (XRD). The drying temperature was found to significantly influence the particle sizes of NiO supported on MCM-41, but the calcination temperature and metal loading had less influence. Interestingly, the small particle size (≤3.3 nm) and the high dispersion of NiO particles were also obtained for co-impregnation on the mixed support (MCM-41:HZSM-5 = 1:1), similar to that on the single MCM-41 support, leading to excellent hydrogenation activity at low temperature. The guaiacol conversion could reach 97.9% at 150 °C, and the catalytic activity was comparative with that of noble metal catalysts. The hydrodeoxygenation (HDO) performance was also promoted by the introduction of acidic HZSM-5 zeolite and an 84.1% yield of cyclohexane at 240 °C was achieved. These findings demonstrate potential applications for the future in promoting and improving industrial catalyst performance.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Weijia Li,Xinyu Yang,Yueying Zhang,Xidong Hao,Tong Liu,Xishuang Liang,Fangmeng Liu,Xu Yan,Fengmin Liu,Yuan Gao,Jian Ma,Geyu Lu
In this work, carbon fiber carrying platinum-nickel alloy is used as a sensing electrode material to develop a H 2 S gas sensor based on Nafion proton membrane. Characterizations of the material by X-ray diffraction (XRD), scanning electron microscope (SEM) and Energy Dispersive Spectrometer (EDS) reveal that the structure and morphology of the particles change with the ratio of the alloy. The electrochemical specific area (ECSA) of the material is calculated by cyclic voltammetry, which further proves the influence of alloy formation on the catalytic performance of the materials. When the ratio of platinum to nickel is 1:1, the material is uniformly loaded and its catalytic performance is optimal. Thus, the device made with it has the highest sensitivity. The sensor's low detection limit is 0.2 ppm. For the incorporation of nickel, the sensitivity is increased to -0.306 μA/ppm, which is 18 % higher than before. Not only does the sensor have good repeatability and short response recovery time, the presence of oxygen and water vapor does not have much effect on the sensor. Therefore, it has a great application potential in the field of gas detection at room temperature.
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Journal of Materials Chemistry A
·
2025
·
IF 9.5
Qingyun Liu,Yi Wang,Tianzhao Hu,Shaorui Chen,Yaozu Wang,Hui Zhao,Wu Zhang,Zhigang Yuan,Yulian Wang,Zhenhua Sun,Feng Li
Achieving high energy density in aqueous asymmetric electrochemical capacitors hinges on the development of electrode materials that combine exceptional capacitance with superior conductivity. Despite its high theoretical capacitance, Ni(OH)2 is limited by low intrinsic conductivity, significantly limiting its performance. In this study, a Mn–Ni(OH)2@1T-MoS2 heterostructure was synthesized through a facile growth method, achieving significant electrochemical performance boost. The lattice matching at the heterointerface induces a controlled lattice expansion in Mn–Ni(OH)2, while the interfacial interactions promote electron transfer from Mn–Ni(OH)2 to 1T-MoS2. These synergistic effects enhance conductivity and active site utilization, addressing the core challenges of pristine Ni(OH)2. As a result, the heterostructure exhibits a high specific capacity of 244.2 mA h g−1 at 1 A g−1 and a rate capability of 51.4% at 12 A g−1. Moreover, the assembled asymmetric electrochemical capacitor delivers an energy density of 61.67 W h kg−1 at 600 W kg−1 and maintains 72.7% capacity retention after 10 000 cycles at 5 A g−1. This work not only highlights the critical role of heterointerfaces in enhanced electrochemical performance but also provides a robust strategy for designing high-performance energy storage systems.
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产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Renjie Ji,Xiaorui Li,Yonghong Liu,Hui Jin,Lixin Wang,Hao Sun,Shuo Liu,Xinlei Wu,Chao Zheng,Runsheng Li,Xiaopeng Li
A superamphiphobic microporous array surface was prepared for the first time by adding diamagnetic MoS₂ particles in the process of magnetic field-assisted jet electrodeposition in this paper. The diamagnetic MoS₂ particles were added to the electrodeposition solution. Then, the edges of MoS₂ provided preferential nucleation and deposition sites, and thus they were codeposited on the substrate surface with Ni²⁺ and Fe²⁺. With a magnetic field, the magnetization effect made the microstructures with the same magnetic pole repel each other and they were connected by the MoS₂ to form micropores. Finally, the superamphiphobic effect was achieved through low surface energy modification. Experiments showed that when the concentration of MoS₂ was 6 g/L and the magnetic field intensity was 50 mT, a Ni-Fe-MoS₂ surface with a longitudinal “olive-shaped” microporous structure could be prepared on the substrate. The contact angles of the deposition layer surface to water and oil were 160.87° and 153.92°. In addition, the surface of the deposition layer had good friction performance. The wear debris generated after friction and wear filled the gaps in the hole structure, which leveled the surface of the deposition layer. Moreover, the wear debris produced rolling friction during friction and wear, reducing the dry friction coefficient of the deposition layer surface to as low as 0.153, and the weight-loss rate after friction and wear was only 0.05 %. This paper provided a method for forming a superamphiphobic microstructure on the surface of the deposition layer under the coupling effect of diamagnetic MoS₂ and a magnetic field, which was of great significance for the efficient and rapid preparation of superamphiphobic surfaces with a low friction coefficient.
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