Sustainable Energy & Fuels
·
2023
·
IF 5.6
Shixiong Min,Zhe Meng,Yaoyao Zhao,Wenjing Li,Zhengguo Zhang,Fang Wang
Developing cost-effective and efficient hydrogen/oxygen evolution reaction (HER/OER) electrocatalysts that can work stably at industrial-level current densities is of paramount importance for the scalable implementation of water electrolysis. Herein, a monolithic chainmail electrode is fabricated by embedding self-phosphorized graphitic carbon-encapsulated Co2P nanoparticles within a hierarchically porous carbon membrane matrix (Co2P@CTF) via the direct carbonization of a Co2+-cross-coupled soybean protein framework. While formulating the soybean protein framework into a hierarchically porous, mechanically strong, and conductive carbon membrane, the endogenous N and P sources enable the heteroatom doping of the carbon matrix while simultaneously yielding graphitic carbon-encapsulated Co2P nanoparticles. Such an integrated Co2P@CTF monolithic electrode exhibits remarkable alkaline water splitting performance with low overpotentials of 177.5 and 388.4 mV at 100 mA cm−2 for the HER and OER, respectively, with excellent stability for the HER even at 1000 mA cm−2 over 100 h and for the OER at 100 mA cm−2 for >50 h. An electrolyzer assembled using Co2P@CTF requires a cell voltage of 1.69 V at 10 mA cm−2 with a high solar-to-hydrogen (STH) conversion efficiency of 16.8% when powered using a commercial silicon solar cell. This work opens a new avenue for scalable fabrication of monolithic chainmail electrodes with desirable functionalities for sustainable electrochemical energy conversion.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2016
·
IF 2.848
Jia-liang Lv,Qing-da An,Wei Zheng,Yuan Fan,Zhi-min Lei,Shang-ru Zhai
There is an interesting yet challenging task to develop a facile procedure for designing multifunctional carbonaceous materials for environmental applications. In this research, multifunctional hierarchical cabbage-like carbonaceous materials (Fe/CCMs-X) have been fabricated via a facile hydrothermal carbonization (HTC) of furfural in the presence of cobalt acetylacetonate, followed by simple impregnation iron salts and heating treatment. The structure, morphology and magnetic properties were characterized by powder X-ray diffraction (XRD), N 2 adsorption-desorption isotherms, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM) techniques; and its adsorption behaviors of Cr(VI) were investigated in detail. Batch experiments were conducted at relatively mild conditions (pH ∼ 3). The adsorption equilibrium data was best fitted by Langmuir isotherm model and the adsorption kinetics followed pseudo-second-order models. The maximum capacity predicted by the Langmuir model is 75.3 mg/g for Fe/CCMs-800. Furthermore, thermodynamic parameters (Δ H > 0, Δ S > 0, and Δ G < 0) revealed that the sorption reaction was a spontaneous and endothermic process. Most of important, the excellent magnetism (79.9 emu g −1 ) provided an ideal magnetic-separation performance from aqueous systems. It demonstrated that this newly prepared multifunctional hierarchical carbonaceous materials (Fe/CCMs-X) are promising sorbents for chromium(VI) ions removal from water.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nano Materials Science
·
2019
·
IF 0
Pin Song,Jun Di,Lixing Kang,Manzhang Xu,Bijun Tang,Jun Xiong,Jiewu Cui,Qingsheng Zeng,Jiadong Zhou,Yongmin He,Qundong Fu,Juan Peng,Shasha Guo,Bo Lin,Jingyu Zhang,Peng Meng,Zheng Liu
Room temperature Na-ion batteries (SIBs) show great potential for use as renewable energy storage systems. However, the large-scale application of SIBs has been hindered by the lack of an ideal SIBs anode material. We synthesized MoS 2 on carbonized graphene-chitosan (G-C) using the hydrothermal method. The strong interaction between the MoS 2 and the G-C greatly improved the electron transport rate and maintained the structural stability of the electrode, which lead to both an excellent rate capability and long cycle stability. The G-C monolith was proven to enhance the electrical conductivity of the composites and served as a matrix for uniformly dispersing active MoS 2 nanosheets (NSs), as well as being a buffer material to adapt to changes in volume during the cycle. Serving as an anode material for SIBs, the MoS 2 -G-C electrode showed good cycling stability (527.3 mAh g −1 at 100 mA g −1 after 200 cycles), excellent rate capability, and a long cycle life (439.1 mAh g −1 at 1A g −1 after 200 cycles).
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 28
·期 29
·1801989
·
IF 13.325
Lei Liu,Yu Chen,Yihao Xie,Peng Tao,Qinyi Li,Chenglin Yan
Carbon-based materials are considered to be one of the most promising materials for negative electrodes of the future, because of their good chemical stability, high electrical conductivity, and environmental benignity. However, to date, the underlying principles of K-ion storage in carbonaceous anodes remain elusive, which greatly hinders the development of such a category of anodes. Herein, the ultrastable K-ion storage of carbonaceous anode through systematic analyses, including comprehensive electrochemical characterizations, kinetics calculations, and structural/compositional evolution mechanism studies, is theoretically elucidated and experimentally verified. Specifically, it is found that the uniquely envelope-like nitrogen-doped carbon nanosheets with high pseudocapacitive could bring ultrastable storage of potassium ions, delivering a high initial reversible capacity of 367 mAh g −1 at a current density of 50 mA g −1 and retain 70.5 and 75.6% at current densities of 500 and 1000 mA g −1 after 1000th cycle, respectively. This study could enlighten researchers on further progress in the field of carbonaceous K-ion battery negative electrode with a long cycle life.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Jia-Liang Lv,Shang-Ru Zhai,Ce Gao,Nan Zhou,Qing-Da An,Bin Zhai
Three-dimensional (3D) hierarchical cabbage-like carbonaceous materials (Fe/CCMs- X , X means treating temperature) have been successfully prepared employing combinatorial processes of cobalt-assisted hydrothermal carbonization (HTC) of furfural and subsequent iron salt impregnation and thermal treatment. This new absorbent was characterized using powder X-ray diffraction (XRD), N 2 adsorption–desorption isotherms, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM) techniques. The maximum reflection loss (RL) of Fe/CCMs-500 reached −22.9 dB, and the effective absorption bandwidth (RL ⩽ −10 dB) was 4.32 GHz (7.76–9.84 GHz and 11.20–13.44 GHz) corresponding to an absorber thickness of 2.5 mm, a low loading amount of iron (6.83%) component and high carbon content (69.8%), clearly demonstrating its wide absorption frequency range and strong absorption ability. It is thus believed that the newly synthesized Fe/CCMs-500 can serve as light-weight electromagnetic wave absorbent and can be potentially used in practice.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xuan Zhang,Weiquan Zhan,Qizheng Weng,Shaoxian Song,José Luis Arauz-Lara,Feifei Jia
With increasing demands for rare earth elements (REEs) in high-tech and futuristic applications, developing efficient methods for recovering low-concentration REEs is necessary. Here, electro-assisted sorption of low-concentration REEs , La(III), Gd(III) and Y(III) (as symbol of light, medium, and heavy REEs) on carbon-based materials, activated carbon (AC), graphene, and graphite by a facile method was reported. Recovery of La(III), Gd(III) and Y(III) could reach ∼100 % under low-concentration condition where the maximum adsorption capacity was up to 342.38 mg/(g·dm 2 ). Variants including applied voltage, electrodes-distance, pH, impurities, and concentration were considered to study the effects on REEs recovery. Interestingly, adsorption capacity and recovery under low voltage were respectively almost 20 and 14 folds than that without voltage, because voltage promoted REEs transfer and strengthened electrostatic interaction between electrodes and REEs. The mechanism for enhancing REEs recovery on carbon-based electrodes was resulted from high electric double layer (EDL) capacitance and low charge transfer resistance. Total desorption of REEs from electrodes could be quickly realized using NH 4 Cl or HCl solution. Overall, the study gave a new insight of low-concentration REEs recovery using carbon-based materials, and provided an efficient route using electric method with porous materials for REEs recovery.
研究领域:
材料科学
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环境科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Aggregate
·
2023
·
IF 18.8
Xiao Chen,Lei Wang,Yan Gao,Yang Li,Xiaowei Zhang,Yu Jiang,Ge Wang
The photothermal conversion capacity of pristine organic phase change materials (PCMs) is inherently insufficient in solar energy utilization. To upgrade their photothermal conversion capacity, we developed bimetallic zeolitic imidazolate framework (ZIF) derived Co/N co-doped flower-like carbon (Co/N-FLC)-based composite PCMs toward solar energy harvesting. 3D interconnected carbon framework with low interfacial thermal resistance, abundant carbon defects and high content of nitrogen doping, excellent localized surface plasmon resonance (LSPR) effect of Co nanoparticles, and light absorber Co 3 ZnC in Co/N-FLC synergistically upgrade the photothermal capacity of (polyethylene glycol) PEG@Co/N-FLC composite PCMs with an ultrahigh photothermal conversion efficiency of 94.8% under 0.16 W/cm 2 . Uniformly anchored Co and Co 3 ZnC nanoparticles in carbon framework guarantee excellent photon capture ability. Bridging carbon nanotubes (CNTs) in 2D carbon nanosheets further accelerate the rapid transport of phonons by constructing cross-connected heat transfer paths. Additionally, PEG@Co/N-FLC exhibits a thermal energy storage density of 100.69 J/g and excellent thermal stability and durable reliability. Therefore, PEG@Co/N-FLC composite PCMs are promising candidates to accelerate the efficient utilization of solar energy.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2024
·Vol. 14
·期 3
·667-672
·
IF 4.4
Qiulan Huang,Ruiqin Ren,Jia Li,Muhammad Waqas,Pan Chen,Xiaotian Liu,Dujuan Huang,Zhongyun Yang,Xinglan Peng,Du-Hong Chen,Youjun Fan,Wei Chen
Fabricating highly competent and cost-effective catalysts is essential for promoting the sluggish kinetics associated with the oxygen reduction reaction (ORR). Herein, a new type of Fe, Co decorated porous carbon composite catalyst co-doped with S and N (FeCo–SNC) was prepared by a simple carbonization process. Interestingly, FeCo–SNC inherits not only the pore structure but also the large surface area of the ZIF-67 dodecahedron. Furthermore, the electronic configuration of the two catalytic centers in Fe–N–C and Co–NC was customized. On the basis of synergetic coordination between the two active sites, the fabricated FeCo–SNC showed prior stability for the ORR even after 10 000 cycles of cyclic voltammetry measurement, besides the great limiting current density of 5.99 mA cm−2 and high half potential of 0.856 V (vs. reversible hydrogen electrode), surpassing the commercially available Pt/C catalyst. Moreover, the primary active site of Fe–N–C was regulated, providing the highest catalytic activity for the ORR. This research offers a new perspective on enhancing carbon-based catalysts for the ORR without relying on precious metals and introduces a strategic method for controlling active centers.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Shengjie Li,Chengqing Tang,Yaoqieyu Song,Sheng Zhang,Zhi Hong Hang,Xiaohua Zhang,Yitan Li,Zhaohui Yang
Electromagnetic interference (EMI) shielding materials with lightweight, high shielding effectiveness, excellent chemical stability, especially minimized secondary electromagnetic pollution, are urgently desired for integrated electronic systems operating in harsh working environments. Here in this study, by systematically engineering and matching the interfacial properties of carbon-based membrane materials, i.e., graphite paper, whisker carbon nanotube paper (WCNT paper), carbon nanotube film (CNT film), bucky paper (BP), and carbon cloth (CC) with three-dimensional (3D) porous carbon nanotube sponge (CNTS), we successfully constructed a series of multifunctional all-carbon EMI shielding materials, which exhibit excellent average shielding effectiveness of over 90 dB with a thickness of about 1 mm and dramatically minimized secondary electromagnetic reflection. Moreover, benefiting from the all-carbon nature and engineered interfaces, our CMC materials also exhibit excellent photothermal and Joule heating performances. These results not only provide guidance for designing advanced multifunctional all-carbon EMI shielding materials but also shed light on the hidden mechanism between interfaces and performances of composite materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Weiping Ye,Shuai Wang,Zhuangyi Zhou,Xin Yang,Zhiyuan Chen,Yue Zhang,Kunyao Cao,Yushan Zhou,Rui Zhao,Weidong Xue
Poor impedance matching and a single loss mechanism are typical challenges for carbon-based materials to become efficient microwave absorbers. To address these issues, defect introduction and interfacial strategies are effective methods for enhancing microwave absorption through the micro-mechanism of material interaction with microwaves. Additionally, forming a homogeneous composite material is crucial for achieving good impedance matching. In this study, we used a controlled solvent-thermal method to achieve self-assembled interfacial intercalation, yielding amorphous VOPO 4 /rGO nanohybrids, which show significantly enhanced microwave absorption properties. The abundant defects introduced by VOPO 4 within the amorphous layered composites disrupt the charge distribution, contributing to polarization loss. The graphene nanosheets expose more VOPO 4 structural units, facilitating increased conductivity and enriching the microwave absorption mechanism. As a result, the prepared VOPO 4 /rGO nanohybrids demonstrate outstanding microwave absorption, with the effective absorption bandwidth covering the entire Ku-band (11.6–18.0 GHz) at a thickness of 2.3 mm. This research provides an important reference for understanding the mechanisms that enhance the electromagnetic wave absorption of carbon-based materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Dandan Zhu,Meijuan Chen,Yu Huang,Rong Li,Tingting Huang,Jun-ji Cao,Zhenxing Shen,Shun Cheng Lee
The increment of N dopants in carbon matrix can effectively enrich the electron density of N-doped carbon encapsulating metal nanoparticles (NPs) via Mott-Schottky effect, thereby favoring the activation of molecular O 2 with abundant free electrons on carbon surface. Herein, given the essential role of oxygen activation in formaldehyde (HCHO) oxidation, Co NPs-embedded nitrogen-doped carbon and carbon nanotubes (Co/NCNT) with controllable N contents (2.30 ~ 4.38 wt%) were prepared and utilized for catalytic oxidation of HCHO at room temperature . Electron transfer from the Co core to the N-doped carbon layer was modulated by the tailorable concentrations of N dopant through the Mott-Schottky effect at their interface, being validated by X-ray and ultraviolet photoelectron spectroscopy, as well as CO 2 temperature-programmed desorption experiment. The catalytic activity increased gradually with the elevation of nitrogen content, achieving a HCHO removal efficiency of approximately 80% over Co/NCNT-5 with the maximum nitrogen content. Combined with the comprehensive characterizations, the mechanism underlying the catalytic activity improvement in HCHO oxidation induced by the Mott-Schottky effect was proposed. This work provides a new insight into optimizing the non-noble metal catalysts for HCHO oxidation at room temperature.
研究领域:
催化化学
·
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Fei Qian,Liuyi Hu,Yonggen Jin,Linhe Li,Ruyi Fang,Jun Zhang,Xinping He,Yongping Gan,Yang Xia,Xinhui Xia,Wenkui Zhang,Hui Huang
All-solid-state lithium-sulfur batteries (ASSLSBs) with high theoretical energy have attracted much attention benefiting from fundamentally addressing the adverse shuttling effect. However, the development of stably operated ASSLSBs remains a great challenge due to the low conductivity and utilization of sulfur. Inspired by the polar single-atom catalyst with 100 % theoretical atomic utilization, a simple and effective strategy is proposed to improve the electrochemical performance of ASSLSBs by introducing Fe nanoparticles into the carbon host material (Ketjen black, KB). The in-situ grown Fe nanoparticles not only enhance the conductivity of the host material, but also promotes the conversion reaction of sulfur, resulting in the improvement of sulfur utilization and redox kinetics. Therefore, the initial discharge capacity of the assembled Fe-KB/S cell reaches 976 mA h g −1 at 50 mA g −1 , which is significantly higher than that of the KB/S cell (727 mA h g −1 ). Moreover, the Fe-KB/S cell maintains a reversible specific capacity of 520 mA h g −1 after 150 cycles, which is almost twice that of the KB/S cell. This study provides a valuable reference for the further development of ASSLSBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）