ACS Applied Electronic Materials
·
2025
·
IF 4.7
Jingyi Chen,Tao Jiang,Yao Tan,Yuting Zong,Junjun Huang,Jing Zhang
Electroless plating can achieve the metallization of nonconductive substrate surfaces. Of note, the realization of nonprecious metal catalysis is conducive to promoting the green development of this technology. In this article, a mixture of polyvinyl alcohol (PVA) and nickel chloride is used in catalytic solution by means of a nickel-chelating structure (electron transfer at the O/Ni interface), which simultaneously modifies and activates the substrate surface. Increasing the electron cloud density around nickel cations enhances their catalytic performance. Additionally, trisodium citrate, potassium sodium tartrate, nitrilotriacetic acid, thiourea, and sodium ethylenediamine tetraacetate were elected as coordination agents, and the influence of metal-ion ligand stability constant on the reduction deposition was researched. Coordination bonds can be established between the Cu2+ and O/N/S particles of functional groups in the ligands because paired electrons in O/N/S hybrid orbitals tend to occupy empty Cu2+ hybrid orbitals and establish coordination bonds. What is more important, the copper–potassium sodium tartrate ligand has the lowest stability constant and reduction barrier. Additionally, the plating solution to join the potassium sodium tartrate as a complexing agent can result in the deposition of a highly crystalline and uniform Cu-plated coating on the surface of the substrate. Hence, reducing the Cu2+ reduction barrier (bath stability constant) and enhancing the Ni-catalyzed activity (corresponding electronic structure) will facilitate the achievement of high-efficiency electroless copper plating under nonprecious metal catalysis.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yiling Wu,Kaiji Xu,Jian Tian,Longmei Shang,Kok Bing Tan,Hao Sun,Kang Sun,Xiaoping Rao,Guowu Zhan
The efficient and economic conversion of CO2 and renewable H2 into methanol has received intensive attention due to growing concern for anthropogenic CO2 emissions, particularly from fossil fuel combustion. Herein, we have developed a novel method for preparing Ni/In2O3 nanocatalysts by using porous MIL-68(In) and nickel(II) acetylacetonate (Ni(acac)2) as the dual precursors of In2O3 and Ni components, respectively. Combined with in-depth characterization analysis, it was revealed that the utilization of MIL-68(In) as precursors favored the good distribution of Ni nanoparticles (∼6.2 nm) on the porous In2O3 support and inhibited the metal sintering at high temperatures. The varied catalyst fabrication parameters were explored, indicating that the designed Ni/In2O3 catalyst (Ni content of 5 wt %) exhibited better catalytic performance than the compared catalyst prepared using In(OH)3 as a precursor of In2O3. The obtained Ni/In2O3 catalyst also showed excellent durability in long-term tests (120 h). However, a high Ni loading (31 wt %) would result in the formation of the Ni-In alloy phase during the CO2 hydrogenation which favored CO formation with selectivity as high as 69%. This phenomenon is more obvious if Ni and In2O3 had a strong interaction, depending on the catalyst fabrication methods. In addition, with the aid of in situ diffuse reflectance infrared Fourier transform spectroscopy and density functional theory (DFT) calculations, the Ni/In2O3 catalyst predominantly follows the formate pathway in the CO2 hydrogenation to methanol, with HCOO* and *H3CO as the major intermediates, while the small size of Ni particles is beneficial to the formation of formate species based on DFT calculation. This study suggests that the Ni/In2O3 nanocatalyst fabricated using metal–organic frameworks as precursors can effectively promote CO2 thermal hydrogenation to methanol.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Mingyong Jia,Qianshun Cui,Yueqi Wu,Chengquan Shen,Qiang Shen,Fei Chen
Given the insufficient wettability and compatibility between ceramic and metal, heterogeneous grain boundaries in particular composites consistently represent the primary failure sites related to both mechanical loading and chemical corrosion. To solve as above–mentioned problem and improve the interfacial bonding of ceramic/metal composites, we performed a novel strategy to modify the grain boundaries of AlN/Mo composites via Ni nanoparticles , which was produced via rotary chemical vapor deposition . Without sacrificing ductility, a substantial 46.1 % increase in bending strength was successful attained arises from the combined influence of grain boundary density and diffusion depth, interfacial structure and electronic properties. In view of the limitations of the traditional blending methods, this study made full use of random nucleation characteristics during the oxidation/reduction process in RCVD to form uniform nanoparticle coating on the surface of AlN powder, thereby avoiding potential risks to AlN/Mo composites, such as brittle intermetallic compounds , localized performance variations.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Huixian Weng,Danyang Liu,Shujiang Geng,Gang Chen,Fuhui Wang
Cu/Ni dual-layer coating is applied to improve the performance of SUS 430 steel as solid oxide fuel cells (SOFCs) interconnects. Cu layer is deposited by electroplating, followed by magnetron sputtering Ni layer on top of Cu layer. The coated steels are evaluated in air at 800 °C in correspondence with SOFC cathode environment. Results showed that a considerable amount of Ni diffuses into the steel substrate, while Fe and Cr diffuse from the steel substrate into the coating during the initial oxidation. A (Ni,Fe) 3 O 4 spinel layer is initially formed on the scale surface. Cu diffuses outwards and eventually dopes into (Ni,Fe) 3 O 4 spinel to form (Ni,Fe,Cu) 3 O 4 spinel. The oxide scale evolved into a dual-layer structure of an inner Cr 2 O 3 layer and an outer layer of NiO mixed with spinels after 5 weeks of oxidation. Preoxidation treatment in 800 °C air for electroplated Cu coated steel prior to depositing Ni layer improves oxidation resistance and significantly decreases Cr outward diffusion after 5 weeks of oxidation. Moreover, the oxide scales formed on both Cu/Ni and CuO/Ni coated steels maintain low area specific resistance (ASR) after 5 weeks of oxidation.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Tengyu Zhang,Meijia Liu,Can Li,Jiwei Zhang,Hui Gao,Fangong Kong,Xuezhang Xiao
Magnesium hydride (MgH 2 ) emerges as a cost-effective and high-capacity hydrogen storage candidate. Despite these advantages, its utilization is constrained by sluggish reaction kinetics and the requirement for elevated operating temperatures. In this study, we aim to address these limitations by investigating the synergistic catalytic effect of yttrium fluoride (YF 3 ) and nickel-loaded nitrogen self-doped porous carbon (Ni/C) as catalysts for MgH 2 . Co-doping with YF 3 and Ni/C reduces the dehydrogenation activation energy to 74.56 kJ/mol, enabling 5.22 wt% H 2 desorption within 5 min at 300 °C. Notably, the system exhibits enhanced low-temperature reaction kinetics, with the MgH 2 -YF 3 + Ni/C composite releasing 5.74 wt% H 2 at 250 °C within 30 min. At 50 °C, the co-doped composite achieves a hydrogen storage capacity of 5.18 wt% within 4 h, whereas the composite with Ni/C only absorbs 3.72 wt% H 2 . Moreover, the MgH 2 -YF 3 + Ni/C shows 98.4 % capacity retention after 30 cycles, indicating excellent reversibility. Mechanistic analysis reveals that the outstanding catalytic performance originates from the synergistic effect among YH 2 /YH 3 , MgF 2 , Mg 2 Ni/Mg 2 NiH 4 , and nitrogen-doped carbon. YH 2 /YH 3 and Mg 2 Ni/Mg 2 NiH 4 act as “hydrogen pump”, providing more active sites for the reaction. Additionally, MgF 2 functions as an electron transfer medium, weakening the Mg-H bond. The introduction of nitrogen self-doped porous carbon improves the dispersion of the catalyst and prevents aggregation, enhancing the dissociation of hydrogen molecules. This work demonstrates a promising strategy for improving the low-temperature hydrogen storage performance of MgH 2 and offers insights into the design of rare-earth fluoride-based catalysts.
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JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Fu Xingyu,Chang Shufang,Sun Xiaoqin
Photocatalysis-peroxymonosulfate (PMS) activation system is regarded as a promising strategy for antibiotic degradation. Herein, a type-II SnS 2 /NiFe LDH heterojunction assembled by nanosheets was constructed to realize the dual modulation of photogenerated carrier directional migration and PMS activation sites. The intimate and large coupled interface facilitated the charge separation and transfer. And the optimization of the electronic structure in the heterojunction enabled good visible light absorption capacity. Benefiting from the construction of type-II heterojunction, the Fe 2+ /Fe 3+ and Ni 2+ /Ni 3+ redox cycles in SnS 2 /NiFe LDH had been greatly improved, which further promoted the PMS activation. The constructed heterojunction achieved excellent metronidazole (MNZ) degradation performance (93.9% removal within 30 min) via PMS activation-assisted photocatalysis under visible light irradiation, which was greatly enhanced compared to the control conditions of photocatalysis without PMS (3.5%) or without light irradiation (78.1%). It also demonstrated excellent stability and functioned well across a wide pH range (3–11). The quenching experiments revealed that ·OH and h + were the main reactive species for MNZ oxidation. The mechanism analysis further confirmed that the transfer of photogenerated carriers was consistent with the type-II mode. This study is expected to provide new insights into design and application of type-II heterojunction in PMS activation for efficient wastewater treatment. Graphical abstract
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ChemElectroChem
·
2021
·Vol. 8
·期 24
·4817-4825
·
IF 4.59
Jie Zhu,Qian Zhang,Sudong Yang,Lin Chen,Peng Zhao,Qiang Yan
Graphical Flexibility approach : A facile two-step process for fabricating a distinctive Fe/Fe 3 O 4 composite deposited on carbon fabric as a negative electrode for a flexible nickel-iron battery is reported. The assembled battery exhibited a high voluminal capacity with a stable operating voltage up to 1.7 V, long-term cyclic stability as well as good mechanical stability and flexibility. The nickel-iron (Ni−Fe) battery is a competitive alternative for electrochemical energy storage, owning to its low cost, high safety, and strong auto-adaptive ability. However, the self-discharge and passivation of the negative electrode are the two main issues. In this work, a rock-like Fe/Fe 3 O 4 composite is synthesized and deposited on carbon fabric (Fe/Fe 3 O 4 @CF) by facile electrodeposition and annealing technologies to serve as a binder-free anode, which exhibits a large areal capacity of 0.466 mAh cm −2 and long-term cycling durability. Moreover, the flexible device is assembled by employing Fe/Fe 3 O 4 @CF-750 as anode and Ni(OH) 2 @CF as cathode. The above battery displays an enhanced operating voltage up to 1.7 V, impressive mechanical flexibility, outstanding cycling stability (86.2 % retention of initial value over 6000 charge-discharge cycles), and satisfactory voluminal capacity of 1.33 mAh cm −3 , indicating its potential application for energy supply systems of modern wearable electronics.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Yuanji Xiang,Jianwei Zhao,Lirong Qin,Bi Wu,Xiaolan Tang,Yingying Xu
Direct alcohol fuel cells (DAFCs) are renewable energy sources with the potential to replace fossil fuels. Investigating high-performance electrocatalysts that promote alcohol oxidation is critical. In this study, we demonstrate simple electrodeposition for the controlled synthesis of PdCo catalysts on Ni bowl-like micro/nano array films with the assistance of the monodisperse colloidal sphere template. The PdCo catalysts with the optimal properties was synthesized by optimizing the stirring rate of the electrolyte and the solution concentration. The Pd 8 Co 1 /Ni array film catalyst synthesized at a stirring speed of 200 Revolutions Per Minute (RPM) exhibited the highest electrochemical active surface area (ECSA, 95.65 cm 2 /mg) and specific and mass activities in methanol (173.2 mA/cm 2 and 2032.9 mA/mg Pd , respectively) and ethanol (240.1 mA/cm 2 and 2846.1 mA/mg Pd , respectively) oxidation in alkaline media. This was a considerable improvement compared to the electrocatalytic activities of single-phase Pd and a commercial Pd/C catalyst, and the superior performance of the Pd 8 Co 1 micro/nano array film could be attributed to the bowl-like structure with a high ECSA and the synergistic effect of Pd and Co. Therefore, this study yields necessary insights into the development of high-performance electrocatalysts with potential applications in DAFCs.
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Nanoscience and Nanotechnology Letters
·
2017
·Vol. 9
·期 6
·928-933
·
IF 1.889
Li Na,Feng Yahui,Du Jingjing,Li Changyun,Xie Shaowen,Xu Jianxiong
Hierarchically nanoporous Pd–HSiO1.5 particles were prepared by dissolving template method. The particles were analyzed by transmission electron microscope (TEM), nitrogen adsorption stripping curves, Barrett-Joyner-Halenda (BJH) pore size distribution curves and Fourier
Transform Infrared (FTIR). Hierarchically nanoporous Pd–HSiO1.5/Ni–Co composite electrodes were fabricated by the method of composite eletrodeposition using hierarchically nanoporous Pd–HSiO1.5 particles as composite nanoparticles. The electrocatalytic
activities for hydrogen evolution of the Ni–Co alloy electrodes and hierarchically nanoporous Pd–HSiO1.5/Ni–Co composite electrodes were studied. Results showed that the specific surface area and pore volume of nano-hierarchical porous silicon hydrogen compound
particles were 896 m2/g and 1.30 cm3/g respectively, the size of the hollow spheres was about 70 nm, and the thickness of the spherical shell was about 10 nm. In addition, the precious metal Pd was successfully loaded on the inside and surface of the hierarchically nanoporous
silicon hydrogen compound. The size of the inside Pd nanoparticles was about 3 nm, and the size of superficial Pd nanoparticles was 10–30 nm. The electrocatalytic hydrogen evolution performance of hierarchically nanoporous Pd–HSiO1.5/Ni–Co composite electrodes
was superior than that of Ni–Co alloy electrode, and the electrocatalytic activities of Pd–HSiO1.5/Ni–Co composite electrodes for hydrogen evolution reached the optimal value when the concentration of hierarchically nanoporous Pd–HSiO1.5 particles
was 1.8 g/L.
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LANGMUIR
·
2023
·
IF 3.9
Xingke Zhao,Jiajia Wan,Di Sun,Ge Li,Haodong Ma,Honglin Li,Zhenming Chen,Xing Liu,Junjun Huang,Chengmei Gui
The exploration of flexible and lightweight electromagnetic interference (EMI) shielding materials with excellent shielding effectiveness, as a means to effectively alleviate electromagnetic pollution, is still a tremendous challenge. This paper proposes a conducting material named the textured Ni-encapsulated carbon tube, which can be applied in EMI shielding material by being inserted in the center of a poly(dimethysiloxane) (PDMS) polymer. We demonstrated that Pd2+ could be absorbed by the active groups on the plant fiber surface to catalyze the reduction of Ni2+ as a catalytic center by means of a textured Ni-encapsulated plant fiber. Owing to the outstanding heat-conducting capability of the Ni coating, the inner plant fiber was carbonized and attached to the Ni-tube inside the surface during annealing. To be precise, the textured Ni-encapsulated C tube was fabricated successfully after annealing at 300 °C. On further increasing the annealing temperature, the C tube disappeared gradually with the Ni coating being oxidized to NiO. Of note, the C tube acted as a support layer for the external Ni coating, providing sufficient mechanical strength. When combined with the coating PDMS layer, a flexible and lightweight EMI shielding material is fabricated successfully. It displays an outstanding EMI shielding effectiveness of 31.34 dB and a higher specific shielding efficiency of 27.5 dB·cm3/g, especially showing excellent mechanical property and flexibility with only 2 mm thickness. This study provides a new method to fabricate outstanding EMI shielding materials.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yu Liu,Lu Han,Jinhao Zhang,Ruxue Yao,Haoqi Zhan,Huawei Yang,Liangjiu Bai,Lixia Yang,Donglei Wei,Wenxiang Wang,Hou Chen
O2 activation for the green conversion of chemicals has attracted a great deal of attentions in the field of chemistry. Developing catalysts for aerobic oxidation with both prominent instinct activity and desirable micro/nanostructure remains a tough challenge. In this work, hierarchical hollow Co–Ni–Mo–O mixed metallic-oxide nanotubes constructed by ultrathin CoMoO4/NiMoO4 nanosheets were fabricated using a sacrificial template method and employed as catalysts in aerobic oxidative desulfurization (AODS) of a model fuel. With air as the oxygen source, the catalyst demonstrated surprisingly high activity by achieving complete conversion of dibenzothiophene under mild reaction conditions. Besides, the catalyst demonstrated excellent stability on continuous repeated use. A further mechanism study reveals the electron coordination and transfer between different metal species as well as the activation route of O2. Based on the above-mentioned results, the catalyst which allows a good exposure of metal centers, a high concentration of oxygen vacancies, and the desired electronic structure is expected to serve as the high-performance AODS catalyst.
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PLoS One
·
2019
·Vol. 14
·期 7
·e0220005
·
IF 2.776
Shuyao Zhang,Zheling Zhang,Xiaoling Zhang,Jian Zhang
In present work, a highly sensitive biosensor with high selectivity for glucose monitoring is developed based on novel nano-composites of nitrogen doped graphene quantum dots (N-GQDs) and a novel bimetallic Cu/Ni core-shell nanoparticles (CSNPs) (Cu@Ni CSNPs/N-GQDs NCs). With the tuned electronic properties, N-GQDs helped bimetallic core-shell structure nanomaterials from aggregation, and separate the charges generated at the interface. This novel nano-composites also have the good electrical conductivity of N-GQDs, catalyst property of Cu/Ni bimetallic nano composite, Cu@Ni core-shell structure and the synergistic effect of the interaction between bimetallic nano composite and N-GQDs. While modified the electrode with this novel nano-composites, the sensor’ linear range is 0.09 ~ 1 mM, and the limit of detection (LOD) is 1.5 μM (S/N = 3) with a high sensitivity of 660 μA mM -1 cm -2 , and rapid response time (3 s). Its’ LOD is more than 74 times lower than the traditional Cu@Ni CSNPs modified working electrode. It also has higher sensitivity and wider linear range. This indicates the great potential of applying this kind of nano composites in electrode modification.
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