ChemElectroChem
·
2022
·Vol. 9
·期 11
·e202200209
·
IF 4.782
Caifu Wang,Zhonghai Zhang
Graphical C 3 N 3 /Cu foam catalyzed HER : Carbon nitride (C 3 N 3 ) nanosheets are directly grown on copper foam via a solvent-free vapor-solid phase reaction, which serves as an efficient catalytic electrode for (photo)electrochemical hydrogen evolution and shows outstanding performances with a low overpotential of 142 mV@10 mA cm −2 and a small Tafel slope of 75.5 mV dec −1 . The performances of C 3 N 3 nanosheets is further improved under simulated solar irradiation. In this work, carbon nitride (C 3 N 3 ) nanosheets are directly synthesized on copper foam via a solvent-free vapor-solid phase reaction. Electrochemical measurement results indicate that C 3 N 3 nanosheets achieve outstanding electrocatalytic performances with low overpotential (142 mV@10 mA cm −2 ) and small Tafel slope (75.5 mV dec −1 ), which are superior to most metal-free hydrogen evolution reaction electrocatalysts in acid medium reported so far. In addition, the electrocatalytic performances of C 3 N 3 nanosheets are further slightly improved under simulated solar irradiation. What's more, the synthetic strategy of C 3 N 3 nanosheets could be extended to other substance system. More importantly, our impressive work was expected to inspire more potential researches in the future.
研究领域:
材料科学
·
电化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yuhao Qian,Jiabao Lv,Yunhao Zhong,Xuting Liu,Xiaodong Li,Yaqi Peng,Jianhua Yan,Angjian Wu
Electrocatalytic nitrate reduction reaction (NO 3 RR) provides a promising route for nitrate recycling and ammonia production. In this work, Co nanoparticle catalyst was developed on a copper foam substrate (CoNPs/CF) by electrodeposition. The CoNPs/CF catalysis exhibits a Faradaic efficiency (FE) of 92.0% at −0.2 V vs. RHE and an NH 3 yield rate of 14328.65 μg h −1 cm −2 at −0.5 V vs. RHE. In-suit Raman spectroscopy and theoretical calculations demonstrated that the 3D copper foam structure of the substrate enhances the electron exchange capacity, which promotes the adsorption of nitrate on the cobalt (Co) surface. Moreover, Membrane Electrode Assembly (MEA) is employed with CoNPs/CF, contributing to 98.43 mg h −1 with FE over 80%. Coupled with an air stripping process, this configuration has enabled the successful production of high-purity gaseous NH 3 products. This work suggests a practical and viable approach for the conversion of wastewater nitrate into valuable ammonia products.
研究领域:
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2021
·
IF 5.485
Boya Ma,Wenjing Lv,Jinying Li,Chunwei Yang,Qian Tang,Dong Wang
Aniline is a refractory pollutant with high toxicity that will cause pollution if discharged without treatment. However, conventional technology cannot meet the requirements of safe disposal. It is necessary to develop novel treatment technology to address this problem, and the electro-Fenton process could be a solution. In this study, a novel CNT-Ag@Cu cathode was synthesized by Ag doping and multiwall carbon nanotube (CNT) 3D morphology modification of copper foam (CF). The composition, structure and morphology of CNT-Ag@Cu were obtained. The aniline removal rate was over 99% under optimal conditions. The kinetic analysis results indicated that aniline removal followed a pseudo-first-order kinetic law, and the reaction rate constant reached 0.0661 min −1 . The aniline removal rate also reached 99.2% after the CNT-Ag@Cu cathode was used 10 times without further treatment. The CNT-Ag@Cu cathode had an excellent ability to maintain an OH concentration that reached 0.5 μmol/L after 60 min of reaction. Aniline removal is a coupling multimechanism in which Ag loading improves H 2 O 2 generation and the nanoconfinement effect of CNTs promotes accumulation of a high concentration of OH.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Wang Yan,Wang Hanbo,Wan Sheng,Pei Dongyu,Wang Ziming,Xu Shaopeng,Tian Yumei,Lu Haiyan
A hierarchical structure consisting of Co Ni layered double hydroxide nanosheets (LDH-NSs) enwrapped copper oxide nanorods (CuO-NRs) was synthesized in situ on the surface of copper foam (CF) through direct oxidation and electrodeposition methods. The CF skeleton provided the desired electrical conductivity, while in-situ oxidation of CuO-NRs eliminated the need for binders. Moreover, the uniform growth of LDH-NSs on CuO-NRs via electrodeposition facilitated the formation of a stratified structure, effectively inhibiting the aggregation of LDH-NSs and providing ample active sites for the adsorption/desorption and transportation of electrolyte ions. Adjusting the molar ratio of Co 2+ to Ni 2+ in the electrolyte influenced the electrochemical properties, resulting in efficient in-situ growth, a porous structure, and uniform morphological control. The CF@CuO@Co-Ni LDH-2 (Co: Ni = 1:2) sample demonstrated the most favorable electrochemical performance, primarily attributed to its superior Ni: Co synergistic effect. As a wonderful electrode material, it exhibited a high specific capacitance of 2628.4 F g −1 at a current density of 2 A g −1 . Even after 5000 cycles at 20 A g −1 , it maintained an outstanding retention rate of 95.00 %. As expected, the assembled asymmetric supercapacitor displayed a remarkable energy density of 101.54 Wh kg −1 . The supercapacitor exhibited an impressive retention rate of 87.57 % after 10,000 cycles at 20 A g −1 . This study highlighted the potential of hierarchical electrode materials prepared via direct oxidation and electrodeposition for supercapacitor applications. The electrodeposition method preserved all active components on the carrier surface and improved the utilization rate of active sites, while avoiding the use of adhesives, templates, or surfactants, simplifying the procedure.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Jun-Heng Fu,Xiangyu Zhou,Yi Li,Ziling Wang,Yujie Cao,Xinlong Sun,Boyuan Zhao,Fangrui Feng,Minglei Yan,Yun Zeng,Jie Xiao,Yuntao Cui,Yang Zhao
Metal oxides with the remarkable interfacial activity and selective absorption properties in the electrochemical detection of heavy metals ions , are still challenging to synthesize due to agglomeration and inferior electrical conductivity . A tungsten oxide/liquid metal/copper foam (WO 3 -LM-Cu) hierarchical tandem electroabsorption was rationally designed and fabricated in this work. The alloying effects of gallium-based liquid metal promoted the uniform growth and conductivity of WO 3 nanoparticles , and the cuboid-shaped structure optimized for intense heavy metal ion adsorption via the valence transfer of tungsten oxide . Then, the influences of electrochemical parameters, such as electrolyte pH, deposition potential, and enrichment time on detection performance were investigated. The resulting sensor demonstrated a wide linear range (20–100 ppb) and superior limits of detection (0.0878 ppb) for detection of lead ions , exhibiting excellent anti-interference ability and satisfactory repeatability (RSD < 1.25 %, n=7). This work offers a simplified and dependable methodology for fabricating self-supporting metal oxide electrodes that exhibit exceptional detection capabilities, paving the way for significant advancements in the application of tungsten oxide for electrochemical detection of heavy metal ions.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jianxiong Xing,Tao Chen,Zihao Wang,Zhicui Song,Chaohui Wei,Qijiu Deng,Qiang Zhao,Aijun Zhou,Jingze Li
Lithium (Li) metal anode (LMA) is one of the most promising anodes for high energy density batteries. However, its practical application is impeded by notorious dendrite growth and huge volume expansion. Although the three-dimensional (3D) host can enhance the cycling stability of LMA, further improvements are still necessary to address the key factors limiting Li plating/stripping behavior. Herein, porous copper (Cu) foam (CF) is thermally infiltrated with molten Li-rich Li-zinc (Li-Zn) binary alloy (CFLZ) with variable Li/Zn atomic ratio. In this process, the LiZn intermetallic compound phase self-assembles into a network of mixed electron/ion conductors that are distributed within the metallic Li phase matrix and this network acts as a sublevel skeleton architecture in the pores of CF, providing a more efficient and structured framework for the material. The as-prepared CFLZ composite anodes are systematically investigated to emphasize the roles of the tunable lithiophilicity and hierarchical structure of the frameworks. Meanwhile, a thin layer of Cu-Zn alloy with strong lithiophilicity covers the CF scaffold itself. The CFLZ with high Zn content facilitates uniform Li nucleation and deposition, thereby effectively suppressing Li dendrite growth and volume fluctuation. Consequently, the hierarchical and lithiophilic framework shows low Li nucleation overpotential and highly stable Coulombic efficiency (CE) for 200 cycles in conventional carbonate based electrolyte. The full cell coupled with LiFePO 4 (LFP) cathode demonstrates high cycle stability and rate performance. This work provides valuable insights into the design of advanced dendrite-free 3D LMA toward practical application.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
ChemCatChem
·
2020
·Vol. 12
·期 6
·1639-1646
·
IF 4.853
Pan Li,Jianzhi Wang,Ning Cai,Lei Wang,Jing Tong,Faquan Yu
Graphical The center of attention : The CuO x @CoO nanorods grown on Cu Foam with the hierarchical configuration and the heterojunction interfaces enjoyed a couple of advantages of self-supported electrodes: needing no glue as an electrode, avoiding the agglomeration of MOFs-based particles, and forming the outward active figuration and large specific surface area. Those features lead to superior OER performances. The fabrication of cost-effective and performance-advanced electrocatalysts is in great requirements for water splitting to achieve sustainable oxygen production. A simple and effective precursor of ZIF-67 particles mounted on Cu(OH) 2 nanorods was induced by a template alignment method. After annealing, hierarchical CoO polyhedron-decorated CuO/Cu 2 O (CuO x ) nanorods on Cu foam (denoted as CuO x @CoO NRs/CF) were achieved, which displayed the heterojunction in CuO x components, hierarchical configuration and outward active sites. These features, verified by HRTEM, SEM, XPS and EDX, optimized the oxygen evolution reaction (OER) electrocatalyst. Benefiting from its large electrochemical surface area and the synergetic effect between CuO x and CoO, CuO x @CoO NRs/CF exhibited considerable catalytic activity with a low overpotential of 254 mV to obtain a current density of 10 mA cm −2 in alkaline electrolyte and a scarce loss of the initial catalyst activity over 24 h and over 5000 cycles. This work provides a channel to enhance the performance in OER.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROANALYSIS
·
2016
·Vol. 28
·期 9
·2070-2074
·
IF 2.471
Lili Bie,Xue Luo,Luqi Kang,Daiping He,Ping Jiang
Commercially available copper foam (CF) was used as a 3D porous electrochemical sensing platform for nonenzymatic glucose detection. CF shows high electrocatalytic activity towards glucose oxidation and can be used directly for glucose electrochemical sensing without any pretreatment. The sensor exhibits high performance towards glucose in 0.1 M NaOH solution with the linear range from 1 μM to 0.5 mM, the sensitivity of 5.85 mA mM −1 cm −2 and the detection limit of 0.5 μM (S/N=3) simultaneously. Furthermore, the sensor shows a high selectivity for glucose against the common interferences and good reliability for glucose detection in human serum samples.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 35
·13451-13461
·
IF 4.569
Jiahui Chen,Yunming Li,Huangqing Ye,Pengli Zhu,Xian-Zhu Fu,Rong Sun
Prussian blue analogues (PBAs) as a class of metal–organic frameworks demonstrate a promising platform to develop cost-effective high-performance electrocatalysts. However, the construction of delicate micro/nanostructures and controllable doping are still a challenging task for the fabrication of highly efficient copper-based electrocatalysts. Herein, we report a facile synthesis of copper foam supported Cu3P@Co-Cu3P (CH@PBA-P/CF) sub-microwire arrays as an active electrocatalyst for alkaline water splitting. The Co-Cu3P shell derived from the Cu3[Co(CN)6]2 PBA serves as the source of active sites. Co doping and construction of core–shell structures endow the CH@PBA-P/CF electrocatalyst with abundant catalytic sites, enhanced intrinsic activity, and low charge transport resistance. The catalytic electrode integrated with 3D copper foam and 1D sub-microwire arrays is highly conductive and stable, which promotes the charge transport and improves the structural stability. As a consequence, CH@PBA-P/CF shows impressive catalytic performances toward the HER and OER in terms of low overpotentials of 231 and 312 mV at a current density of 50 mA cm−2 in 1 M KOH, respectively. Notably, the water electrolyzer using the CH@PBA-P/CF electrode exhibits better water splitting performance than the one using noble metal-based couples.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yuan Wang,Wenqi Zhang,Yuyang Qi,Shaofu Wang,Pei Liu,Xiaoyun Wei,Yanhua Yu,Weiwei Sun,Xing-Zhong Zhao,Yumin Liu
Metallic Li, with ultrahigh theoretical capacity (3860 mA h g −1 ) and the lowest electrochemical potential (−3.04 V vs. the standard hydrogen electrode), is perfectly meet the needs of high energy density lithium batteries . However, the direct use of metallic lithium as anode would cause serious dendrite and huge volume expansion, which will bring safety hazards and restrict the practical commercialization of Li metal anodes . Herein, a facile electrophoretic deposition (EPD) method was employed for the first time to fabricate uniform TiN modified commercial Cu foam (TiN@Cu foam) as the lithiophilic 3D conductive skeleton. The lithiophilic TiN acts as the well-distributed seeds to promote the uniform lithium deposition, attributing to the lowed nucleation overpotential. The porous and conductive Cu foams can further mitigate the formation of Li dendrites, on account of its high specific surface area reduce the effective current density. The TiN@Cu foam based half cells and symmetric cells both exhibit improved reversibility and reduced polarization voltage in lithium plating/stripping process. Furthermore, better rate performance and cycling stability were also achieved in the full-cell configurations of TiN@Cu foam-Li/Li 4 Ti 5 O 12 (LTO) and TiN@Cu foam-Li/LiFePO 4 (LFP). This work demonstrates a facile strategy to modify the commercial current collectors with pre-synthesized lithiophilic nanoparticles for achieving uniform Li deposition.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Umair Yaqub Qazi,Rahat Javaid,Nadeem Tahir,Akmal Jamil,Adeel Afzal
Electrocatalytic water splitting is one of the most favorable methods for industrial-scale hydrogen production , but high cost and scarcity of commercially available noble metals restrict its application for hydrogen evolution reaction (HER). It is challenging to develop efficient non-noble metal-based electrocatalysts for HER. Herein, a Ni–Cr was doped on Copper foam (CF) substrate by adopting a simple annealing process . The high electrocatalytic efficiency for HER was achieved with Ni–Cr@CF electrode in strong basic medium with a lower overpotential of 144 mV to gain a current density of 10 mA cm −2 with a small Tafel slope of 88 mV dec −1 . After surface modification, the CF substrate exhibits that the entire surface was uniformly covered with Ni–Cr species ensuring the fast reaction kinetics due to the efficient electron transfer process between the substrate and active catalyst. Moreover, the Ni–Cr@CF electrode exhibits excellent stability up to 2000 cycles under the strong basic medium.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2021
·
IF 3.882
Yonghui Zhang,Jiangwen Liu,Ligeng Ouyang,Jiaming Li,Guie Xie,Yinyin Yan,Can Weng
Frequent leakage and pollution of oily wastewater seriously affect the world’s ecosystem safety and economic development, which prompts us to urgently develop a highly effective, low-cost, wear-resistant, chemically stable, and environmentally friendly new functional material for oil/water separation. In this paper, a robust superhydrophobic material was successfully electrodeposited on the porous copper foam substrates in myristic acid (CH3(CH2)12COOH) and lanthanum chloride (LaCl3·6H2O) electrodeposition solution under a continuous pumping circulation and rotation condition. Moreover, SEM, EDS, XRD, FTIR, and XPS technologies were utilized to characterize the surface morphology and chemical composition information. The superhydrophobic property was evaluated by optical contact angle instrument and high-speed camera. It turned out that the micro/nanostructures were mainly composed of lanthanum myristate, and static CA of superhydrophobic copper foam (SCF) was up to 165.2° with SA ≈ 2°. Besides, the SCF exhibited a better performance with good anticorrosion, excellent chemical stability, and outstanding mechanical stability. Furthermore, the SCF can achieve up to 98.6% oil/water separation efficiency. More importantly, by employing this novel processing method, it can effectively save time and provide a promising potential way to make denser and thicker foams for continuous oil/water separation and may be easily applied to other conductive metal matrix materials.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）