INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Ling Wang,Wenzong Liu,Thangavel Sangeetha,Zechong Guo,Zhangwei He,Chuan Chen,Lei Gao,Aijie Wang
High overpotential and soaring prices of the cathode electrode are the bottlenecks for the development of microbial electrolysis technology for hydrogen production . In this study, a novel one-step electrodeposition method has been attempted to fabricate electrodeposited cathodes in situ growth of Ni–Co–S, Ni–S, Co–S catalyst on nickel foam (NF) to reduce the overpotential of electrodes. Finally, a uniform nanosheet with a high specific surface area and more active sites is formed on the NF surface, resulting in a lower overpotential than plain NF. At 0.8 V, the Co–S/NF cathode produces a favorable 42% increase in hydrogen yield (0.68 m 3 ·m −3 ·d −1 ), 40% upsurge in current density (10.6 mA/cm 3 ) and 39% rise of cathodic recovery rate (58.0 ± 3.2%) than bare NF, followed by Ni–Co–S/NF and Ni–S/NF cathode. All the electrodeposited electrodes demonstrate enhanced current density and reduced electron losses, thereby achieving efficient hydrogen production . These innovative varieties of electrodes are highly advantageous as they are relatively inexpensive and easy to manufacture with great potential in reducing costs and further real time application in large scale.
研究领域:
生物电化学
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材料科学
·
可再生能源
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Qian Yu,Jingshu Wang,Haibo Li,Ruiqing Li,Suyuan Zeng,Rui Li,Qingxia Yao,Hongyan Chen,Konggang Qu,Yao Zheng
In the electrocatalytic oxygen reduction and hydrogen evolution reactions (ORR/HER), metal-free carbon-based materials presented great potentials as alternatives to Pt because of their flexible adjustability of electronic and geometric properties. The pursuit of high-performance carbons demand for high-level doping, large surface area and high graphitization, but the improvement of the former two aspects would inevitably impair the third one, which seems a contradictive proposition. Herein, by a facile “mix-and-pyrolyze” method, natural DNA was first developed to synthesize N, P, S-tridoped carbons (NPSC) with porous sheet structures, high graphitization, large surface areas and abundant high-quality dopants simultaneously. Thus, the newly-prepared NPSC displays superior alkaline ORR performance comparable to Pt/C together with excellent acidic activity and better stability. Meanwhile, NPSC is one of most active acidic HER catalysts and the best alkaline HER catalyst among carbon counterparts. Density function theory computation reveled the origins of superior performance are attributed to positively charged C sites neighboring to S for ORR and P sites for HER because of DNA-derived advantaged structural features. The as-fabricated rechargeable zinc–air battery based on current tridoped carbon has closed peak power density and specific capacity but much better charge–discharge stability compared with Pt/C.
研究领域:
材料科学
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电化学
·
计算化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yafei Sang,Jianhan Huang
Porous materials with high Brunauer-Emmett-Teller (BET) surface area ( S BET ) and abundant ionic active sites facilitate efficient CO 2 capture and conversion. Herein, a kind of novel benzimidazole-based hyper-cross-linked poly(ionic liquid)s (HPILs) were developed via the hyper-cross-linking strategy and the as-prepared HPILs possessed high S BET (485–780 m 2 /g), plentiful micro/mesoporosity, and abundant ionic active sites. The HPILs showed noteworthy CO 2 uptake (79–143 mg/g at 273 K and 1.0 bar), moderate isosteric heats (32–45 kJ/mol), and acceptable CO 2 /N 2 selectivity (IAST: 23–46). Intriguingly, HPILs-Cl-2 exhibited excellent catalytic activity for CO 2 cycloaddition and 99% of propylene oxide was successfully converted to cyclic carbonates under mild conditions (70 °C, 0.1 MPa CO 2 , 9 h). This synthetic strategy is of great importance for the functionalized hyper-cross-linked polymers and the synthesized HPILs are promising for efficient CO 2 capture and conversion under mild conditions.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2022
·
IF 9.257
ZhiLong Han,Han Zhang,Qiang Wu,ShuPing Li,Wei Zhong,RenJie He,ShiJie Cheng,Jia Xie
Silicon-sulfur (Si-S) full cells show significant potential in energy storage due to their high theoretical energy density compared to commercial lithium-ion batteries. Nevertheless, a majority of electrolytes reported for Si-S full cells still cannot meet the requirements of stable long-duration cycling. Herein, we report a high-areal-capacity Si-S full cell consisted with prelithiated SiO, thick Li 2 S-Se 0.05 S 0.95 @pPAN electrode and a trifluorobenzene (F 3 B) modified and diluted high-concentration electrolytes. This novel electrolyte can effectively mitigate the volume expansion of the prelithiated SiO anode and enhance the utilization of active S in the cathode, showing excellent compatibility with electrodes. The assembled Si-S full cell using modified electrolyte displays remarkable cyclability over 100 cycles at 0.1C, exhibiting higher capacity retention (54.0% vs . 17.5%) than the pristine electrolyte without F 3 B. More importantly, a full cell with a thick sulfur cathode (16 mg/cm 2 ) exhibits a superior initial areal capacity of 8.34 mAh/cm 2 and high-capacity retention of 52% after 80 cycles, even at a lean electrolyte condition (2 μL/mg). This work provides guidance for the achievement of high-performance Si-S full cells under lean electrolytes.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
MACROMOLECULES
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2022
·
IF 6.057
Yujian Liu,Yongyao Lei,Yougen Chen
The current contribution presents the synthesis of poly[oligo(ethylene glycol) sorbate]s (PREGmSs) by the t-Bu-P4-catalyzed group transfer polymerization (GTP) method, their postpolymerization modification at the backbone double bond, and thermoresponsive properties in aqueous solution. Four oligo(ethylene glycol) sorbate monomers (REGmSs), including 2-(2-methoxyethoxy)ethyl sorbate (MeEG2S), 2-(2-(2-methoxyethoxy)ethoxy)ethyl sorbate (MeEG3S), 2-(2-(2-ethoxyethoxy)ethoxy)ethyl sorbate (EtEG3S), and 2-(2-(2-(2-methoxyethoxy)ethoxy)ethoxy)ethyl sorbate (MeEG4S), are newly designed to study the thermoresponsive properties of their related polymers. The t-Bu-P4-catalyzed GTP of REGmS only proceeds in a 1,4-regioselective addition manner to quantitatively produce the backbone trans-rich (ca. 80%) PREGmS. The complete hydrogenation and epoxidation of the backbone double bonds result in hydrogenated and epoxidized polymers (PREGmS-H2 and PREGmS-epoxy, respectively), which have different main-chain structures and rigidity from their parent PREGmS. Given the 1,4-substituted structure of a sorbate monomer, the chemical structure determination of PREGmS-H2 by 13C NMR spectra demonstrates that the above polymers have an erythro-rich (ca. 60%) structure in diastereochemistry and a diisotactic/disyndiotactic ratio around 1:1 in stereoregularity. The thermoresponsive properties of PREGmS, PREGmS-H2, and PREGmS-epoxy in aqueous solutions are studied in detail from various aspects in terms of polymer mass concentration, molecular weight, length and end group of the oligo(ethylene glycol) side chain, and main-chain structure by turbidity, 1H NMR spectroscopy, and dynamic light scattering (DLS) methods, which are discussed below.
研究领域:
高分子化学
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材料科学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2020
·
IF 4.189
Shuxin Zhang,Yan Huang,Yanna NuLi,Baofeng Wang,Jun Yang,Jiulin Wang
Magnesium–sulfur (Mg–S) batteries have received extensive attention due to the high theoretical energy density, low cost, high safety, and environmental friendliness. In this work, sulfurized pyrolyzed polyacrylonitrile (S@pPAN) composite is used as a cathode material of Mg–S batteries, and a comparative study on the effects of different binders on the electrochemical performance is reported for the first time. The selected binders are commercial organic-soluble poly(vinylidene fluoride) (PVDF) and water-soluble poly(ethylene oxide) (PEO), sodium polyacrylate (PAAS), locust bean gum (LBG), guar gum (GG), carboxymethyl cellulose (SCMC), and β-cyclodextrin (β-CD). The binders significantly affect the physical properties of S@pPAN electrodes and thus the electrochemical performance of the batteries. Compared to the traditional PVDF binder and other water-soluble binders, the S@pPAN electrode with an amorphous PAAS binder has better cycle stability and rate capability. The three-dimensional (3D) network formed from PAAS cross-linking improves the cohesion among the electrode constituents, and the adhesion between the electrode laminate and the current collector maintains the uniformity of electrode surface after cycling. The present work demonstrates the feasibility of using green aqueous binders to enhance the electrochemical performance of Mg–S batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2023
·
IF 9.5
Jinyuan Zhu,Wenqiao Meng,Qiang Xue,Kaisong Zhang
Nano-fillers will be an attractive strategy to improve salt fractionation of nanofiltration (NF) membrane if the integrity problem of nano-fillers in PA layer is well addressed. In this work, molybdenum disulfide (MoS 2 ) nanosheets sulfonated with 1,3-propane sultone was added to the aqueous phase to participate in the interfacial polymerization reaction and construct a novel thin-film nanocomposite (TFN) nanofiltration membrane . A series of characterization and discussion were carried out on the obtained nanomaterials and membranes. The S–MoS 2 nanosheet can be well wrapped by the resulted PA layer, thereby preserving the integrity of the PA skin. Furthermore, The TFN membranes possessed enhanced electronegativity and hydrophilicity and the PA layer became thinner and denser after introducing the sulfonated MoS 2 nanosheets (S–MoS 2 ) in the PA matrix. In particular, the optimal S–MoS 2 composite membrane exhibits excellent performance, which approximately reach 99% divalent salt (Na 2 SO 4 ) rejection and 1.4-fold water permeance of the pristine membrane. Overall, this study provided a novel way for separation treatment of hypersaline wastewater.
研究领域:
材料科学
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环境工程
·
纳米技术
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2020
·
IF 5.604
Chaohu Xiao,Weidong Liang,Qi-Meige Hasi,Lihua Chen,Jingxian He,Fang Liu,Chengjun Wang,Hanxue Sun,Zhaoqi Zhu,An Li
Solar steam generation is one of the most promising technologies to utilize solar energy, which is applied to extract fresh water from seawater or contaminated water. However, solar vapour generation is usually restricted to the underutilization of solar energy or depends on complicated light-harvesting adjuncts. Here, a novel hierarchically double-layered evaporation device was demonstrated based on poly(ionic liquid)s hydrogel with the upper surface co-modified by polypyrrole (PPy) and silver particles (named as Ag/PPy-PMBA-BrILs). The evaporation system exhibits a cooperative interaction of the double-layer with efficient light-absorbing and water transportation, leading to a high evaporation rate of 1.37 kg m −2 h −1 with a photothermal conversion efficiency of 88.7% under 1 sun illumination. The high evaporation rate is mainly due to the synergistic light absorption of polypyrrole and silver particles as well as the excellent water transfer capability of poly(ionic liquid)s hydrogel. Moreover, the hydrogel-based evaporation device also exhibits excellent salt-resistant performance for solar desilination in artificial sea water. The high-efficiency poly(ionic liquid)s hydrogel based solar steam generator with co-modified light-absorbing surface may open new opportunities for the future design and fabrication of high-performanced solar steam generator for practical applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2026
·
IF 4
Yufeng Zhao,Haozhi Wang,Keyi Zhou,Daoping He,Xi Chen
Electrochemical nitrate reduction to ammonia (NO3RR) represents a promising approach for wastewater treatment while simultaneously offering an alternative to the Haber-Bosch synthesis process. However, current research on metal-free carbon-based catalysts remains limited in scope, exhibits relatively low catalytic performance, and predominantly relies on carbon precursors derived from non-renewable resources. To address these challenges, this study employs chitin and shrimp shells as a precursor to synthesize sulfur-nitrogen co-doped carbon (SNC) catalysts via thiourea doping. At -0.95 V (vs. RHE), the optimized catalyst achieves a Faradaic efficiency of 97.6% and an ammonia yield rate of 21,012 μg h-1 mg-1. Characterizations such as high-resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and in situ attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) have been conducted to elucidate the catalyst structure and proposed reaction pathways.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·
IF 4.4
Zuo Guangling,Ye Hongyong,Du Jia,Ding Xin
A ternary Ag/Bi 2 O 3 /g-C 3 N 4 (Ag/BO/CN) photocatalyst was fabricated through a combined solvothermal and photochemical reduction approach for the degradation of ciprofloxacin hydrochloride (CIP). Upon illumination with simulated sunlight, the optimized Ag/BO/CN composite efficiently degraded CIP, resulting in near-complete (98.14%) removal within 100 min. This remarkable property is attributed to a synergetic interaction between the Ag surface plasmon resonance (SPR) effect and the S-scheme heterojunction (between BO and CN). In-situ XPS analysis and work function ( Φ ) calculations confirmed the S-scheme charge migration pathway. In this scheme, an internal electric field (IEF) prompts the reunification of less-reactive charge carriers, thereby selectively retaining the highly reductive electrons (e − ) in the conduction band (CB) of CN and the strongly oxidative holes (h + ) in the valence band (VB) of BO. Quenching experiments and electron spin resonance (ESR) spectroscopy identified superoxide radicals (·O 2 − ) and hydroxyl radicals (·OH) as the primary reactive intermediates. Moreover, the catalyst shows considerable promise for practical deployment, as evidenced by its excellent stability over four consecutive cycles and sustained degradation performance across various real water systems. Graphical abstract The alternative text for this image may have been generated using AI.
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DOI
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2016
·Vol. 33
·期 8
·569-575
·
IF 4.367
Yuqi Xu,Yongchao Hao,Guoxin Zhang,Xiuyan Jin,Lin Wang,Zhiyi Lu,Xiaoming Sun
Herein, a strategy for one-step fabrication of cobalt sulfide/graphene (Co 1− x S/G) nanocomposite as bifunctional catalyst for oxygen catalysis is demonstrated. The one-step fabrication method involves annealing the mixture of cobalt salt, thioacetamide, and graphene oxide with the assistance of small amount of glycol without any further purification steps. The Co 1− x S/G shows a morphology with small-sized Co 1− x S nanocrystals strongly and uniformly anchored on the graphene surface. Systematically electrochemical studies demonstrate that the Co 1− x S/G with optimized components shows superior catalytic activities toward oxygen reduction and oxygen evolution, which are comparable or even superior to commercial Pt/C and Ir/C catalysts. As a result, the potential hysteresis of Co 1− x S/G is the lowest among all the samples. The facile operability of the fabrication method and the high bifunctional activity of Co 1− x S/G may pave one practical way for broad applications including fuel cell, metal-O 2 battery, and water electrolysis.
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DOI
高影响因子
Energy Storage Materials
·
2019
·
IF 0
Xiang Li,Lixia Yuan,Dezhong Liu,Zhen Li,Jie Chen,Kai Yuan,Jingwei Xiang,Yunhui Huang
Lithium sulfur (Li–S) battery is considered as one of the most viable candidates for next-generation rechargeable batteries. However, the development of Li–S battery is severely hindered by the stubborn “shuttle” issue that arises from the dissolution of the intermediate polysulfides. Herein, a new kind of organosulfur polymer composite is designed as cathode material for Li–S batteries. Via a facile two-step heating method, the ring opening S is copolymerized with triallyl isocyanurate. The resulting S-triallyl isocyanurate organosulfur polymer composite (STI) demonstrates a unique two-phase structure: ultrafine monoclinic S particles embedded in the organosulfur polymer matrix, which enables a S content as high as 90 wt%. The STI cathode delivers a high initial reversible capacity of 904 mA h g −1 at 0.5 C, and an ultraslow capacity decay rate of 0.017% over 350 cycles at 1 C. The work offers new insights into the design of S-rich copolymer composite cathode for highly-stable Li–S batteries.
研究领域:
储能
·
材料科学
·
电化学
✓ 已验证
DOI
危险品化学品经营许可证（带存储）