ACS Sustainable Chemistry & Engineering
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2023
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IF 8.4
Lin Liu,Yu Chen,Jiaojiao Chen,Wenda Liu,Guoxuan Tang,Haocun Wen,Zeyi Xiao,Senqing Fan
In order to achieve a balance between a good hydrogen evolution reaction (HER) performance and a low amount of catalyst loading, Pt@Ti membrane self-supporting electrodes have been fabricated by flowing synthesis. The characterizations by X-ray diffraction (XRD), X-ray photoelectric spectroscopy (XPS), and transmission electron microscopy (TEM) demonstrate the successful loading of Pt nanoparticles into the pores of a porous Ti membrane substrate. The scanning electron microscope (SEM) results demonstrate that the sizes of the Pt nanoparticles immobilized in Ti membrane pores are mostly in the range of 10–40 nm, and the average size was about 26 nm. The ICP test proves that the amount of Pt loading was only 0.760 mg cm–2. A minimum overpotential of 35 mV and a minimum Tafel slope of 30 mV dec–1 can be achieved for a Pt@Ti membrane self-supporting electrode at a current density of 10 mA cm–2 with 0.5 M H2SO4 as the electrolyte. No decay of current density is observed after a 10 h continuous electrolytic test. Besides, good HER performances can also be obtained under alkaline conditions and neutral conditions for Pt@Ti membrane self-supporting electrodes fabricated by flowing synthesis.
研究领域:
材料科学
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电化学
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DOI
高影响因子
ChemElectroChem
·
2018
·Vol. 5
·期 17
·2376-2382
·
IF 4.446
Gang Yuan,Xiaopo Niu,Zhichao Chen,Li Wang,Xiangwen Zhang,Qingfa Wang
Graphical Ni 3 S 2 acts as a noble catalyst : A 3D porous, defect rich, and self-supported Ni 3 S 2 @Ni foam with core-shell structure is fabricated as electrocatalyst for methanol fuel cells. The electrocatalyst shows Pt-like activity, high poison tolerance, and long-term stability towards methanol oxidation in alkaline media. Direct methanol fuel cells are promising renewable energy devices for automobiles and portable electronic devices. The development of high effciency, poison tolerance, long-term stability, and noble metal-free electrocatalysts for methanol oxidation is still a major challenge. Herein, we develop a noble metal-free, 3D self-supported, defect-rich, hierarchical shell-core structured Ni 3 S 2 composite on Ni foam as electrocatalyst. This electrocatalyst shows a good activity, poison tolerance, and long-term durability towards methanol oxidation in alkaline media. It shows the lowest onset potential (−340 mV vs. Hg/HgO) among all the Ni-based catalysts reported up to date and a Pt-level specific activity. The methanol oxidation peak current of the electrocatalyst retains more than 97.5 % even after 5,000 voltammetry cycles in 0.5 M KOH+1 M CH 3 OH. The morphology and composition of the electrocatalysts before and after stability test were characterized by SEM, TEM, XRD, and XPS. The high activity, poison tolerance, and stability are attributed to the binder-free, directly grown Ni 3 S 2 shell on the Ni foam backbone, the lattice defect sites, and the synergetic effects between the in-situ formed active NiO x core and Ni 3 S 2 shell during methanol oxidation. This work indicates that the self-supported hierarchical shell-core Ni 3 S 2 @Ni foam electrocatalyst is a viable alternative for commercial Pt-based electrocatalyst applied in fuel cells.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Xiangju Chen,Yang Hong,Xiaoli Ge,Caixia Li,Xianguang Miao,Peng Wang,Zhiwei Zhang,Longwei Yin
Taking advantage of nano-sized active materials, doping and self-supporting, Se-doped Bi 2 S 3 /3D carbon foam (Bi 2 S 3-x Se x /CF) is synthesized through a pyrolysing-hydrothermal-heating three-steps process. The as-synthesized Bi 2 S 3-x Se x /CF hybrid exhibits a significant improvement in electrochemical performance, showing a high specific capacity of 441.8 mAh g −1 after 100 cycles with the coulombic efficiency approximating to 100%. The special nanoneedle-like structure of Bi 2 S 3 makes for shortening ion transmission distance, minishing the mechanical stress and thus improving the electrochemical performance. And the introduction of Se can enhance the specific capacity, cycling stability and rate performance by improving of electronic conductivity and forming Se-contained inactive phase during alloying process. Furthermore, the self-supporting electrode is beneficial to simplify preparation process and reduce the loss of volume energy density . The strategy presented in this paper to improve the electrochemical performance of secondary ions battery can be also applied to other novel electrodes materials.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
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IF 7.139
Wenqian Liu,Yang Tang,Fan Liu,Li Gao,Daxiang Yang,Jingang Yang,Shu-Juan Bao
Trace precious metal modifying inexpensive transition metal catalyst is an effective method to optimize the activity, stability and cost of hydrogen evolution catalysts. In this feature work, self-supporting sandwich structured Co–Pt–Co/CC sheets were assembled on a carbon cloth (CC) by a simple electrodeposition/chemical displacement alternate growth method. Surprisingly, only 2.1 wt % Pt sandwich layer greatly improved the electrochemical activity of Co–Pt–Co/CC, which delivered a current density of 10 mA cm −2 at an overpotential as low as 46 mV. Importantly, its overpotential is almost 6 times lower than that of Co/CC, and is comparable to that of Pt–Co/CC. After well-tuning the sandwich layer, the optimized Co–Pt–Co/CC exhibited a higher current density and better long-term durability compared with Pt–Co/CC and Co/CC, which can be attributed to the unique tissue-structure and electronic structure optimization of the Co–Pt–Co/CC by the Pt sandwich layer.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2023
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IF 2.8
Shuang Wu,Canhong Wu,Na Li
Potassium-sulfur (K-S) battery is a promising candidate for high-energy and low-cost energy storage system. However, the development of K-S battery is challenged by the sluggish kinetics, low utilization of sulfur and serious shuttle effect. Herein, a novel self-supporting carbon/sulfur composite cathode (S@GCNs) was developed by infusing sulfur into an interconnected graphitic carbon nanocage (GCNs) network. Typically, the small GCNs (<10 nm) provide a large amount of space for sulfur storage, the sulfur content could reach more than 80 wt%. In addition, the interconnected GCNs network with high conductivity provide fast transport pathways for electrons/ions, and the strong confinement of GCNs on sulfur will buffer the volume expansion of sulfur and alleviate shuttle effect. The unique microstructure of S@GCNs boosts the rate capability and cycle stability of K-S battery, the initial capacity was 452.7 mAh/g, which remained 270.6 mAh/g and 205.9 mAh/g after 10 and 20 cycles, the capacity can reach 97.7 mA h g −1 even at 2000 mA g −1 . Characterizations of the phase and structural evolution of S@GCNs revealed the reversible conversion mechanism of sulfur: S 0 ↔ K 2 S x (x = 5, 6) ↔ K 2 S x (x = 4) ↔ K 2 S 3 .
研究领域:
材料科学
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能源存储
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DOI
高影响因子
ACS Applied Nano Materials
·
2023
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IF 5.9
Min Liang,Wenya Li,Yuanqi Yang,Huizi Li,Jinji Liang,Chenhan Lin,Xiangcong Meng,Jun Liu,Zhicong Shi,Liying Liu
Smart wearable electronic devices are becoming more prevalent in our daily life, exceedingly arousing the increasing demand for flexible energy storage devices. Herein, a sodium superionic conductor (NASICON)-structured Na3V2(PO4)2F3 (NVPF) self-standing cathode is fabricated via an electrospinning technique. NVPF particles at the nanoscale are encapsulated in or attached to the surface of carbon nanofibers to form an NVPF self-standing cathode, which exhibits a high-voltage platform of ∼4.07 V with a reversible capacity of 101.8 mAh g–1 at 0.2C and 98.3% capacity retention after 400 cycles. Moreover, the soft package full battery, assembled with an NVPF self-standing cathode and a Na3V2(PO4)3 (NVP) anode, can light up a light-emitting diode in the folded/unfolded states. The superior sodium storage performance was enabled by the stable structure of the NVPF self-standing cathode. Moreover, the nitrogen-doped carbon nanofiber network of the NVPF self-standing cathode not only ensures the flexibility but also facilitates electron and Na+ transportation. This work provides an NVPF self-standing cathode with excellent mechanical and electrochemical performance for high-voltage flexible sodium-ion batteries, which is beneficial for promoting the practical application of high-voltage flexible sodium-ion batteries.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Materials
·
2025
·Vol. 18
·期 8
·1844
·
IF 3.2
Shuling Shen,Ji Wang,Yaru Li,Xinjuan Liu,Zhihong Tang,Huixin Xiu,Jing Li,Guanglei Zhou
Graphene quantum dots (GQDs) show significant promise as antibacterial agents, but their application is hindered by several limitations, including potential cytotoxicity at high concentrations, as well as concerns regarding aggregation and reusability. In this study, sodium titanate (NTO) ultralong nanotubes were utilized as both a photocatalyst and support for GQDs. The NTO/GQDs heterojunction was formed by embedding GQDs nanoplates onto the walls of NTO nanotubes. This integration significantly improved the visible light absorption and enhanced the separation and transfer of electron–hole pairs, leading to an efficient photocatalytic antibacterial process. The NTO/GQD-8 self-supporting membrane composed of these ultralong nanotubes demonstrated outstanding antibacterial efficiency (99.99%) againstE. coliand exhibited remarkable cycling stability. Radical scavenging experiments revealed that ∙OH and e−were the primary reactive species driving the photocatalytic antibacterial process. Notably, NTO and NTO/GQDs-8 exhibited distinct antibacterial outcomes. After photocatalytic treatment with NTO/GQDs-8,E. colicells were completely fragmented, with no intact cell structures remaining due to the synergy effect of GQDs’ physical cutting during photocatalytic treatment.
研究领域:
材料科学
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微生物学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Geoenergy Science and Engineering
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2025
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IF 4.6
Xu Liang,Ke Xu,Qingzhong Zhu,Dingwei Weng,Pinhong Zhu,Cunchuan Zheng,Wei Wang
Due to the contradiction between the size, sedimentation of proppants and the complex fracture network created by low-viscosity fluids, fractures of various sizes are difficult to be effectively supported through traditional hydraulic fracturing technology, thus the in-situ self-propping fracturing fluid (ISSPFF) technology came into being. This technology only injects liquid into the wellbore to create fractures, autogenous proppants (APs) are then formed in the reservoir in situ with the increased temperature, which greatly improves the efficiency of reservoir stimulation. Herein, styrene is first selected as the polymerization reaction monomer for the synthesis of a novel ISSPFF system and the corresponding APs. Owing to the reduced interfacial energy, a stable water/oil dispersion system of the ISSPFF is formed, further confirmed by the molecular dynamics simulation. By optimizing component concentrations, the synthesized APs exhibit remarkable properties of uniform particle size, enhanced compressive strength, high conductivity, and long-term stability, better than those of the quartz sand. On this basis, the solidification behavior of the ISSPFF system with formation fluids, core column, crustal stress, and narrow fractures is thoroughly explored. The ISSPFF system can effectively open and support the microfractures with the average permeability and Kirschner permeability increased by 18 times and 42 times, respectively, revealing its great potential in improving the conductivity of microfractures. As a result, the developed ISSPFF system is highly expected to be applied in hydraulic fracturing for unconventional reservoir stimulation.
研究领域:
石油工程
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材料科学
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DOI
高影响因子
Carbon Capture Science & Technology
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2025
·
IF 10.5
Dudu Li,Zhifang He,Ying Chen,Zelong Xu,Zibo Yang,Hao Zhang,Zhihua Qiao
Carbon nanotubes (CNTs), known for their elevated specific surface area, exemplary mechanical properties and thermal stability, are regarded as optimal reinforcing fillers for the fabrication of mixed matrix membranes (MMMs). In this study, self-supported MMMs were prepared using melted zeolitic imidazolate framework (ZIF), denoted ZIF-62 glass, as the continuous phase and multi-walled CNTs (MWCNTs) particles as the dispersed phase. The resulting membranes were thoroughly characterized, and the effect of different incorporation amounts of MWCNTs on the gas separation performance was investigated. It is noteworthy that at an incorporation amount of 4 wt. % MWCNTs, the ideal selectivity of prepared self-supported ( a g ZIF-62) 0.96 (MWCNTs) 0.04 MMM for CO 2 /N 2 and CH 4 /N 2 was 31.2 and 8.6 respectively, exceeding the 2019 Robeson upper bound. The results demonstrated that MWCNTs have excellent gas transport properties and significantly enhance the separation performance. Furthermore, the self-supported ( a g ZIF-62) 0.96 (MWCNTs) 0.04 MMM also exhibited excellent mechanical properties and pressure resistance, making them highly promising candidates for advanced gas separation applications. This study not only highlights the effectiveness of MWCNTs as functional fillers in MMMs but also presents a novel approach for designing high-performance gas separation membranes.
研究领域:
材料科学
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化学工程
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纳米技术
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Jianhua Feng,Tianlin Ma,Jing Yang,Gangling Chen
The contamination caused by synthetic dyes represents a global challenge that requires immediate and effective solutions. Photocatalysis provides an effective solution to this challenge, and carbon nanotubes (CNTs) represent a promising material for the development of advanced composite photocatalysts. However, the pronounced hydrophobic characteristics significantly hinder its applicability in water-based environments. In this research, the freestanding CNT substrates were modified via the deposition of titanium dioxide (TiO 2 ) using atomic layer deposition (ALD). The loadings of oxide in CNT fabrics were examined by controlling ALD deposition and subsequent calcination conditions. The morphological characteristics, crystalline structure, wettability, and photocatalytic performance of the deposited CNT fabrics were also systematically investigated in detail. The hydrophilicity of CNT fabrics is promoted via ALD of TiO 2 on one hand, and the functionalized fabrics exhibit excellent photocatalytic degradation performance on the other. Compared with pristine CNT fabric, the TiO 2 -CNT composite fabric exhibits excellent photocatalytic degradation performance and stable reusability. After calcination, the integration of CNTs with anatase TiO 2 significantly enhances electron transfer efficiency and markedly reduces the recombination probability occurring between photogenerated electrons and holes.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Lulu Yan,Wenli Su,Xingzhong Cao,Peng Zhang,Yu Fan
This work reports a novel and effective method for the preparation of the copper-indium bimetallic electrocatalysts by the in situ growth of indium-based metal organic frameworks on oxidized copper foils as the precursor. Compared with the oxide-derived copper and the copper-based carbon material derivative grown in situ on oxidized copper foils, the as-prepared copper-indium electrocatalyst with a self-supporting structure, high roughness factor and rich lattice defects exhibits a superior CO Faradaic efficiency of 95% and good stability for the 36-h potentiostatic test at −0.6 V versus a reversible hydrogen electrode. Density functional theory calculations indicated that the indium atoms occupying the surface copper vacancy defects show lower free energy needed for the formation of *COOH and more difficult desorption of *H than indium atoms, supported on the perfect copper surface. Thereby, the copper-indium catalyst promotes CO 2 electroreduction to CO and strongly inhibits hydrogen evolution.
研究领域:
材料科学
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电化学
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DOI
高影响因子
ACS Applied Electronic Materials
·
2021
·
IF 3.314
Peng Wang,Guoxian Li,Jun Liu,Zhanrui Hou,Chuizhou Meng,Shijie Guo
Recently, flexible textile-based sensors have drawn great interest due to their promising application in wearable electronics. However, most previous work has been done either by attaching conventional sensors to a textile-based substrate or by sewing fiber-like sensors into fabrics. The use of an additional substrate would interfere with detection performance and to some extent reduce user experience. Herein, we propose a flexible, freestanding tactile sensor by using the MXene/cotton composite thread as electronic electrodes and ionic gel (IG) as an iontronic electrolyte. Two or more such fiber electrodes are crisscross placed and bonded with a small amount of IG as glue at the intersection points to form the sensor unit or array without using any substrate. Due to its supercapacitive sensing mechanism upon optimization of electrode thickness and IG composition, it shows a high sensitivity of 9.62 kPa–1 (0–40 kPa), ultralow detection limit of 0.884 Pa, and short response time of 24 ms. The sensor is capable of detecting micromotions like pulse beat at the wrist, water dripping, and sound wave through the air. In addition, a 6 × 6 sensor array is demonstrated to acquire 2D pressure mapping with recognition of different object shapes. Moreover, the sensor array can be conformally attached on a complex surface of 3D objects such as a table tennis ball to detect 3D positioned pressures. The proposed tactile-sensing textile in the true sense would provide a concept to develop advanced sensing devices with comfort for wearable systems.
研究领域:
材料科学
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电子工程
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可穿戴设备
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）