JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 31
·期 1
·677-683
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IF 2.195
Wang Jing,Shen Bowen,Zhu Kongjun,Qiu Jinhao
With the ever increasing requirements for the structural health monitoring systems, the deposition of the piezoelectric films on the metallic or structural materials has turned out to be an important issue. Pb(Mg, Nb)O 3 -PbTiO 3 films with different buffer layers, i.e., in situ NiO, pre-fabricated NiO and LaNiO 3 , were successfully deposited on the Ni foil via the chemical solution deposition. The crystal structures and electric performances showed evident dependence on the buffer layer. Pre-deposited NiO and LaNiO 3 efficiently prevented the diffusion and complex reactions occurring at the interface, offered abundant nucleation sites, and thus helped the formation of pure high-qualified perovskite PMN-PT films at higher annealing temperatures.
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ELECTROCHIMICA ACTA
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2024
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IF 5.5
Jinjing Du,Yu Zhou,Xinhai Liu,Xinxin Cui,Xuan Zhang,Bin Wang,Xiao Feng,Jun Zhu,Heng Zuo,Qian Li,Xihong He,Ping Hu
The development of a hydrogen evolution catalyst with both catalytic activity and stability is critical for hydrogen production from electrolytic water. Herein, a V-based porous alloy was prepared via high-energy ball milling and solid-state sintering. Then, the V-based porous alloy was modified with a Ni-Cu-Mo ternary alloy coating by direct current electrodeposition to obtain a composite hydrogen evolution cathode with high hydrogen evolution activity. The substrate has a certain hydrogen storage capacity combined with a high-activity Ni-Cu-Mo coating. The composite hydrogen evolution cathode exhibited high electrocatalytic activity toward the HER. It can afford a lower overpotential of 93 mV and a smaller Tafel slope of 97.4 mV/dec with a current density of 10 mA/cm 2 in 1.0 M KOH. The composite hydrogen evolution cathode demonstrated outstanding stability after 2000 cycles and good durability after intermittent electrolysis for 20 h. Hydrogen protons can protect the components of the cathode composite from dissolution during discontinuous constant potential electrolysis. The composite hydrogen evolution cathode also exhibited a strong catalytic capacity for hydrogen evolution during intermittent electrolysis under alkaline conditions.
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MATERIALS CHEMISTRY AND PHYSICS
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2025
·
IF 4.7
Hong-mei Zuo,Hao Yin,Guoji Yu,Hongjie Wang,He Wang,Yanxia Xie,Fangtao Ruan,Zhenzhen Xu,Lihua Zou,Dian-sen Li
The intensification of electromagnetic pollution has boosted the exploration of high-performance electromagnetic interference (EMI) shielding materials. Herein, 2D MXene, 1D nickel (Ni) chain and PDMS were anchored on 3D porous skeleton of melamine sponge (MS) by a simple, inexpensive and scalable “dipping and coating” method, and a lightweight 3D hybrid nanostructure (MXene-Ni-PDMS/MS) was prepared. Super hydrophobic, high electric conductivity, excellent EMI shielding and outstanding super-elastic performances were obtained via the synergy effect of conductive 2D MXene and 1D Ni chain and hydrophobic PDMS. The results showed that the EMI of MXene-Ni-PDMS/MS with thickness of 10 mm could reach about 50 dB, which was 50 % higher than 25 dB of sponge with thickness of 2 mm, and could meet 20 dB commercial application. Moreover, the hybrid sponge exhibited super-elastic characteristics and could recover to its original state under 60 % strain during compressive fatigue. Even when it was subjected to 500 cycles at 40 % strain, the maximum compressive stress, Young's modulus and energy loss coefficient slightly decreased, indicating that the structure could maintain stable physical properties. The water contact angle could reach 145.1°, showing hydrophobic characteristics. This work offers a novel way for synthesis of excellent EMI shielding materials based on sponge.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Chenyu Song,Jishuang Yang,Chinnadurai Ayappan,Shree Kesavan Kannan,Haitang Yang,Ruimin Xing,Hongxun Yang,Shanhu Liu
The large-scale application of water electrolysis technology is limited by the slow kinetics of the oxygen evolution reaction (OER) that cause vast energy loss. Rational design and construction of hierarchical heterostructures are helpful for developing efficient OER electrocatalysts due to their interesting morphological features and electrochemical properties. Herein, we prepared hierarchical CoS 2 @(Fe,Ni)S 2 heterostructures on carbon fiber paper (CoS 2 @(Fe,Ni)S 2 /CFP) with particle-on-wire morphology using prussian blue analogue as template and precursor. The unique hierarchical heterostructure maximizes accessible active sites and the synergistic effect between different components significantly improves electrocatalytic activity. Impressively, CoS 2 @(Fe,Ni)S 2 /CFP electrocatalyst requires a small overpotential of 237 mV to achieve a current density of 20 mA cm −2 with a low Tafel slope of 54 mV dec −1 and the corresponding voltage has no obvious change after 60 h stability test under a constant current density of 50 mA cm −2 in 1 M KOH solution. This work provides a new idea for the design of efficient and stable non-noble metal-based OER electrocatalysts.
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ACS Nano
·
2024
·
IF 15.8
Peng Du,Bohan Deng,Xian He,Wei Zhao,Hongyi Liu,Yuanzheng Long,Zhuting Zhang,Ziwei Li,Kai Huang,Ke Bi,Ming Lei,Hui Wu
The seamless integration of electrocatalysts onto the electrode is crucial for enhancing water electrolyzers, yet it is especially challenging when scaled up to large manufacturing. Despite thorough investigation, there are few reports that tackle this integration through roll-to-roll (R2R) methodology, a technique crucial for fulfilling industrial-scale demands. Here, we develop an R2R flash Joule heating (R2R-FJH) system to process catalytic electrodes with superior performance. The electrodes exhibited improved stability and activity, showcasing an exceptional performance within an alkaline water electrolysis (AWE) system. They achieved a low operation potential of 1.66 V at 0.5 A cm–2, coupled with outstanding durability over the operation of 800 h. We further demonstrated a prototype of a rolled-up water splitting apparatus, illustrating the efficiency of R2R-FJH electrodes in producing high-purity hydrogen through advanced water oxidation. Our study emphasized the practicality and scalability of the R2R-FJH strategy in the industrial manufacturing of high-performance electrodes for water electrolysis.
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PubMed
高影响因子
Small
·
2024
·
IF 13
Jinghan Zhang,Qiming Chen,Pengwei Zhao,An Cai,Xiaobin Fan,Wenchao Peng,Yang Li
NiFe-based materials, especially NiFe layered double hydroxides (LDHs), are recognized as the most promising non-precious metal electrocatalysts for alkaline oxygen evolution reaction (OER). However, the precisely designed distribution of active sites for enhancing activities is still significantly restricted due to the lack of reasonable modulation strategies. Herein, sulfur doped Ni/Fe gradient-distributed LDH (GD-NiFe LDH/S) is fabricated by facile air-induced strategy at room temperature. This strategy accelerates the growth process with abundant CO 2 and O 2 in air, which promotes the inward migration of Fe species, resulting in gradient distribution with Ni/Fe-rich edge/planar. This allows significant enhancement of Ni/Fe synergistic effect, which plays a vital role in OER. Moreover, the sharp pine-like morphology of GD-NiFe LDH/S endows superhydrophilicity/aerophobicity characteristics, facilitating electrolyte penetrating and oxygen releasing. The optimized GD-NiFe LDH/S delivers superior OER performance with low overpotentials of 234 and 270 mV at 10 and 100 mA cm −2 . The assembled anion exchange membrane water electrolyzer only requires 1.90 V at 1.0 A cm −2 and 2.10 V at 1.5 A cm −2 with robust stability for at least 130 h. This work introduces a facile air-induced strategy under room temperature to controllably design active site distributions of LDH for enhanced OER performance.
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Journal of Energy Storage
·
2024
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IF 8.9
Bin Lu,Guo-Tao Xiang,Jia-Lei Xu,Rui-Dong Shi,Na Chen,Yong-Da Hu,Raul D. Rodriguez,Jin-Ju Chen
Ternary transition metal sulfides are extensively considered as supercapacitor electrode materials due to their remarkable electrochemical properties . However, inferior electrical conductivity and structural stability severely limit their applications. Here, we address these limitations by introducing N-doped carbon dots (N-CDs) into Ni-Co-Mn-S nanoflowers via a two-step hydrothermal process followed by electrodeposition . Ni-Co-Mn-S nanoflowers feature a skeleton structure supporting rich ion transfer paths and abundant active sites, while electrodeposited N-CDs increase the electrical conductivity and enhance the cycling performance. The resulting Ni-Co-Mn-S@N-CDs material demonstrates a remarkable specific capacity of 2267 F g −1 at 1 A g −1 and maintains 96.2 % capacity after 10,000 cycles at 10 A g −1 . Moreover, this electrode material allows the development of hybrid supercapacitors with an impressive energy density of 61.6 Wh kg −1 at 800 W kg −1 and a superior capacitance retention of 89.0 % after 20,000 charge/discharge cycles at 5 A g −1 , alongside an excellent flexibility under various deformations. These findings represent a significant advancement in hybrid solid-state supercapacitors with promising implications for flexible energy storage technologies.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Xinyu Guo,Jiaxin Li,Fanze Meng,Dongdong Qin,Xueyan Wu,Yan Lv,Jixi Guo
Properly design and manufacture of bifunctional electrocatalysts with superb performance and endurance are crucial for overall water splitting. The interfacial engineering strategy is acknowledged as a promising approach to enhance catalytic performance of overall water splitting catalysts. Herein, the Ru nanoparticles modified Ni 3 Se 4 /Ni(OH) 2 heterostructured nanosheets catalyst was constructed using a simple two-step hydrothermal process. The experimental results demonstrate that the abundant heterointerfaces between Ru and Ni 3 Se 4 /Ni(OH) 2 can increase the number of active sites and effectively regulate the electronic structure, greatly accelerating the kinetics of the hydrogen evolution reaction (HER)/oxygen evolution reaction (OER). As a result, the Ru/Ni 3 Se 4 /Ni(OH) 2 /NF catalyst exhibits the low overpotential of 102.8 mV and 334.5 mV at 100 mA cm −2 for HER and OER in alkaline medium, respectively. Furthermore, a two-electrode system composed of the Ru/Ni 3 Se 4 /Ni(OH) 2 /NF requires a battery voltage of just 1.51 V at 10 mA cm −2 and remains stable for 200 h at 500 mA cm −2 . This work provides an effective strategy for constructing Ru-based heterostructured catalysts with excellent catalytic activity.
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PubMed
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Journal of Magnesium and Alloys
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2025
·
IF 13.8
Zexuan Yang,Yazhou Wang,Xia Lin,Yongjin Zou,Cuili Xiang,Fen Xu,Lixian Sun,Yong Shen Chua
Magnesium-based hydrogen storage materials, such as MgH 2 , have attracted considerable attention because of its superior hydrogen storage capacities, inexpensive, and excellent reversibility. However, their high thermodynamic stabilities and slow kinetics lead to relatively high desorption temperatures, which severely limit the wide application of MgH 2 . In this study, the inclusion of vanadium induced the formation Ni-Co metal–organic frameworks (MOF) from a NiCo layered double hydroxide (LDH), thereby increasing the number of defects and vacancies, and improving the hydrogen storage properties of MgH 2 . The synthesized NiCo-MOF/V-O-doped MgH 2 system demonstrates excellent hydrogen storage capacity. More specifically, 5 wt.% of H 2 was released over 20 min at a relatively low dehydrogenation temperature of 250 °C, and almost complete dehydrogenation was achieved at 300 °C for 5 min. In addition, at 125 °C, the hydrogen storage material absorbed 5.5 wt.% H 2 in 10 min. Furthermore, the activation energy of dehydrogenation was determined to be 69.588 ± 6.302 kJ ·mol −1 which is significantly lower than that of the ball-milled MgH 2 (i.e., 118.649 ± 2.825 kJ ·mol −1 ). It was therefore inferred that during dehydrogenation process, a Mg 2 Ni/Mg 2 NiH 4 hydrogen pump is formed by Ni, while the V-H and Co-H bonds formed by Co and V during the reaction act synergistically to catalyze the absorption and desorption of hydrogen, thereby increasing the hydrogen storage capacity of MgH 2 . These experiments provide new perspectives on the commercial application of MgH 2 .
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Huimin Li,Zhe Sun,Chenlong Dong,Xueli Zhang,Chengkun Lei,Baobao Jin,Qianqian Shen,Husheng Jia,Jinbo Xue
Photocatalytic non-oxidative coupling of methane is an attractive strategy for CH 4 to C 2 conversion, how to facilitate the photogenerated charge separation and accelerate the C–C coupling to promote the reaction kinetics remains a great challenge. Herein, a symbiotic r-Fe 2 O 3 /NiO heterostructure with robust interfaces is constructed in situ. The coherent interface not only provides unique Ni–O–Fe asymmetric sites, but also achieves the separation and transport of photogenerated charge. The unbalanced charge density distribution of two adjacent methyl or methylene at the Ni–O–Fe asymmetric site alleviates the dipole repulsion of the C–C coupling, and promotes C–C coupling to form C 2 hydrocarbons. Under visible light irradiation, the optimal r-Fe 2 O 3 /NiO performs a brilliant C 2 activity up to 71.00 μmol g −1 h −1 , and the C 2 H 4 yield can reach a high value of 40.46 μmol g −1 h −1 and the selectivity of 56.98 %. This work provides new insights into the coupling of C–C to generate C 2 hydrocarbons.
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JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Yixuan Wang,Hongyan Ban,Yugao Wang,Ruwei Yao,Shimin Zhao,Jiangliang Hu,Congming Li
Basic sites profoundly affect the mode and strength of CO 2 adsorption in the hydrogenation of CO 2 to formic acid (FA), however, the mechanism by which the quantities and strength of basic sites affect the reaction process is not yet clear. Herein, a Ni/Mg a AlO x catalyst has been developed and the basic sites of the catalyst can be modulated by simply altering the Mg/Al ratio. Through a series of characterizations and experiments, it was observed that weak and medium basic sites synergistically catalyzed the hydrogenation of CO 2 to formic acid, and a reasonable number of weak basic sites can improve reaction performance when a sufficient number of medium basic sites guarantee the fundamental catalytic activity. Moreover, the number and distribution of basic sites are also tightly related to metal-support interactions. This strategy provides theoretical guidance and a feasible scheme for optimizing the performance of non-precious metal heterogeneous catalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Linsen Li,Zhuwei Yang,Xiao Yang,Hui Xiong,Zhao Jiang,Tao Fang
Liquid organic hydrogen carriers (LOHCs) are considered as promising candidates for large-scale hydrogen storage, which offers significant advantages in terms of hydrogen storage density, ease of storage and transportation. NPhCZ (N-phenylcarbazole)/18H-NPhCZ (perhydro-N-phenylcarbazole) is proposed as a typical system with high hydrogen storage capacity. However, low dehydrogenation activity and selectivity of catalysts restrict the cyclic efficiency of hydrogen storage. In this study, the efficient catalysts are designed by the immobilization of ultrafine, highly dispersed Pd nanoparticles onto Ni, N co-doped carbon materials through wet chemical reduction. The Pd/Ni@NC-10 catalyst exhibits the highest catalytic performance with 100 % conversion, 81.9 % selectivity of NPhCZ and 6.48 wt% hydrogen release amount. Combined with XRD, HRTEM, Raman, XPS, H 2 -TPR, N 2 physisorption characterization methods and DFT calculations, it is found that the doped Ni, N species could synergistically increase the dispersion of loaded Pd nanoparticles, as well as regulate the electronic state around Pd, which in turn accelerates the rate of the rate-limiting step. The evident interaction between Pd nanoparticles and Ni, N co-doped carbon brings the enhancement of dehydrogenation efficiency. Besides, the spent catalysts are measured by XRD, TEM, XPS and evaluated for the dehydrogenation reaction, indicating that Pd/Ni@NC-10 shows good structural stability, durability and recyclability. It provides practical guidance for the design of LOHCs dehydrogenation catalysts.
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