INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·Vol. 43
·期 45
·20712-20720
·
IF 4.229
Biyao Jin,Yiqi Li,Lianhua Zhao
Bimetallic PdV/C nanoparticles have been synthesized by phase-transfer method for catalyzing the oxygen reduction reaction (ORR) in alkaline electrolytes . PdV/C nanoparticles with different V contents are spherical with a mean diameter of 3–4 nm, and the addition of V expands the lattice parameter of Pd as shown by XRD . XPS analysis indicated the binding energy of Pd 0 3d peak increased by ca. 1 eV. Density functional theory (DFT) calculations results shows d-band center of Pd down-shift after V-doping. Based on the electrocatalytic results, introducing V can improve the catalytic activity for ORR, methanol crossover tolerance and stability. Especially, Pd 4 V/C shows higher initial potential (E onset = 1.027 V), excellent methanol crossover tolerance (98.03% retained) and long-term stability (81.30% retained), which are comparable with Pt/C JM . This work provides a new method of synthesizing PdV/C nanoparticles , which have the potential to be used as the cathode electrocatalysts for fuel cells.
研究领域:
材料科学
·
电化学
·
纳米催化
·
能源材料
·
燃料电池
·
物理化学
·
表面科学
✓ 已验证
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 29
·2310092
·
IF 13
Yu-Ren Xue,Chang Liu,Hao-Cheng Yang,Hong-Qing Liang,Chao Zhang,Zhi-Kang Xu
Supported ionic liquid membranes (SILMs), owing to their capacities in harnessing physicochemical properties of ionic liquid for exceptional CO 2 solubility, have emerged as a promising platform for CO 2 extraction. Despite great achievements, existing SILMs suffer from poor structural and performance stability under high-pressure or long-term operations, significantly limiting their applications. Herein, a one-step and in situ interfacial polymerization strategy is proposed to elaborate a thin, mechanically-robust, and highly-permeable polyamide armor on the SILMs to effectively protect ionic liquid within porous supports, allowing for intensifying the overall stability of SILMs without compromising CO 2 separation performance. The armored SILMs have a profound increase of breakthrough pressure by 105% compared to conventional counterparts without armor, and display high and stable operating pressure exceeding that of most SILMs previously reported. It is further demonstrated that the armored SILMs exhibit ultrahigh ideal CO 2 /N 2 selectivity of about 200 and excellent CO 2 permeation of 78 barrers upon over 150 h operation, as opposed to the full failure of CO 2 separation performance within 36 h using conventional SILMs. The design concept of armor provides a flexible and additional dimension in developing high-performance and durable SILMs, pushing the practical application of ionic liquids in separation processes.
研究领域:
膜科学与技术
·
气体分离
·
环境化学
·
材料化学
·
化学工程
·
可持续能源技术
✓ 已验证
DOI
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2018
·Vol. 35
·期 4
·1700471
·
IF 4.384
Shanliang Song,Chuanxi Wang,Yue Zhao,Tantan Hu,Xinxin Zhou,Tianxin Zhao,Minghui Yang,Quan Lin
A dual-emission ratiometric fluorescent sensing film for metal ion detection is designed. This dual-emission film is successfully prepared from chitosan, graphitic carbon nitride (g-C 3 N 4 ), and gold nanoclusters (Au NCs). Here, it is shown that the g-C 3 N 4 not only serves as the fluorescence emission source, but also enhances the mechanical and thermal stability of the film. Meanwhile, the Au NCs are adsorbed on the surface of chitosan film by the electrostatic interaction. The as-prepared dual-emission film can selectively detect Cu 2+ , leading to the quench of red fluorescence of Au NCs, whereas the blue fluorescence from g-C 3 N 4 persists. The ratio of the two fluorescence intensities depends on the Cu 2+ concentration and the fluorescence color changes from orange red to yellow, cyan, and finally to blue with increasing Cu 2+ concentration. Thus, the as-prepared dual-emission film can be worked as ratiometric sensing paper for Cu 2+ detection. Furthermore, the film shows high sensitivity and selectivity, with low limit of detection (LOD) (10 ppb). It is observed that this novel gold-cluster-based dual-emission ratiometric fluorescent sensing paper is an easy and convenient way for detecting metal ions. It is believed that this research work have created another avenue for the detection of metal ions in the environment.
研究领域:
分析化学
·
环境科学
·
材料科学
·
纳米技术
·
生物传感器
·
环境监测
·
分子探针
✓ 已验证
DOI
高影响因子
CELLULOSE
·
2018
·Vol. 25
·期 10
·5807-5819
·
IF 3.809
Sun Zhuangzhi,Du Shanqi,Li Fei,Yang Lu,Zhang Dan,Song Wenlong
A nanocomposite soft actuator based on porous high-conductivity electrode membrane, which was composed of biopolymer cellulose mixed with chitosan and highly conductive nanoparticles generated by reduced graphene oxide encapsulated multi-walled carbon nanotube, was developed in this paper. No new substance was discovered in the regenerated electrode layer through the scanning analysis from FT-IR and XRD. Actuators exhibited significant enhancement in peak to peak displacement, which was 3.64 times increased than the traditional value at 5 V 0.1 Hz. With the test of solid-state electric double layer capacitor, actuators showed the highest specific capacitance (10.695 F g −1 ) at the current density of 1 A g −1 , the lowest internal resistance (9.2 Ω g −1 ) in the frequency range of 10 5 –10 −2 Hz, and the lowest energy density (901 Wh kg −1 ) at the current density of 10 A g −1 , which demonstrated the absolute advantages in the conductivity and channels for electrons. These findings suggest that research on porous high-conductivity electrode layer holds great promise in the further study of higher performance actuators.
研究领域:
生物材料学
·
纳米医学
·
组织工程
·
柔性电子学
·
生物力学
·
智能驱动系统
✓ 已验证
DOI
高影响因子
POLYMER BULLETIN
·
2016
·Vol. 74
·期 1
·75-90
·
IF 1.371
Chen Xiuqiong,Yan Huiqiong,Shi Zaifeng,Feng Yuhong,Li Jiacheng,Lin Qiang,Wang Xianghui,Sun Wei
A novel biosensor based on electro-co-deposition of myoglobin (Mb), sodium alginate (SA), Fe 3 O 4 -graphene (Fe 3 O 4 -GR) composite on the carbon ionic liquid electrode (CILE) was fabricated using Nafion as the film forming material to improve the stability of protein immobilized on the electrode surface, and the modified electrode was abbreviated as Nafion/Mb-SA-Fe 3 O 4 -GR/CILE. FT-IR and UV–vis absorption spectra suggested that Mb could retain its native structure after being immobilized in the SA-Fe 3 O 4 -GR composite film. The electrochemical behavior of the modified electrode was studied by cyclic voltammetry, and a pair of symmetric redox peaks appeared in the cyclic voltammograms, indicating that direct electron transfer of Mb was realized on the modified electrode, which was ascribed to the good electrocatalytic capability of Fe 3 O 4 -GR composite, the good biocompatibility of SA and the synergistic effects of SA and Fe 3 O 4 -GR composite. The electrochemical parameters of the electron transfer number ( n ), the charge transfer coefficient ( α ) and the electron transfer rate constant ( k
s ) were calculated as 0.982, 0.357 and 0.234 s −1 , respectively. The modified electrode exhibited good electrocatalytic ability to the reduction of trichloroacetic acid (TCA) with wide linear range from 1.4 to 119.4 mmol/L, low detection limit as 0.174 mmol/L (3 σ ), good stability and reproducibility.
研究领域:
生物传感器
·
电化学
·
蛋白质电化学
·
纳米材料
·
生物相容性材料
·
分子诊断
·
转化医学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 43
·21569-21577
·
IF 7.443
Zhaoqiang Li,Longwei Yin
A sandwich-like structure with reduced graphene oxide (RGO) wrapped MOF-derived ZnCo2O4–ZnO–C polyhedrons on nickel foam as an anode for high performance lithium ion batteries (LIBs) is for the first time reported via simply growing MOFs on Ni foam, and wrapping graphene oxide nanosheets on MOFs, and then annealing under a N2 atmosphere. It should be noted that the MOF-derived porous products are composed of carbon-coated spinel ZnCo2O4–ZnO nanoparticle polyhedrons. When tested as anodes for LIBs, the unique RGO/ZnCo2O4–ZnO–C/Ni sandwich-structured LIB anodes exhibit superior coulombic efficiency, excellent cycling stability and rate capability. The in situ formed carbon layers outside the ZnCo2O4–ZnO act as not only a conductive substrate but also a buffer layer for volume changes. The open pores in ZnCo2O4–ZnO–C polyhedrons provide sufficient electrolyte as well as serve as cushion space to further alleviate volume changes. The RGO nanosheets act as a flexible protector to firmly fix polyhedrons on the Ni foam, as well as a conductive substrate to wire up all the polyhedrons. The interconnected carbon layers and two high conductive substrates (RGO and Ni foam) together form an unhindered highway for charge transfer during discharge/charge processes, promising good electrochemical performance.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
功能材料
·
固态化学
·
电极工程
✓ 已验证
DOI
高影响因子
Science China-Materials
·
2021
·Vol. 65
·期 1
·43-50
·
IF 8.273
Xu Jingyi,Lai Chenling,Duan LiPing,Zhang Yuxuan,Xu Yifan,Bao Jianchun,Zhou Xiaosi
Transition-metal compounds have received extensive attention from researchers due to their high reversible capacity and suitable voltage platform as potassium-ion battery anodes. However, these materials commonly feature a poor conductivity and a large volume expansion, thus leading to underdeveloped rate capability and cyclic stability. Herein, we successfully encapsulated ultrafine CoP and CoSb nanoparticles into rich N-doped carbon nanofibers (NCFs) via electrospinning, carbonization, and phosphorization (antimonization). The N-doped carbon fiber prevents the aggregation of nanoparticles, buffers the volume expansion of CoP and CoSb during charging and discharging, and improves the conductivity of the composite material. As a result, the CoP/NCF anode exhibits excellent potassium-ion storage performance, including an outstanding reversible capacity of 335 mA h g −1 , a decent capacity retention of 79.3% after 1000 cycles at 1 A g −1 and a superior rate capability of 148 mA h g −1 at 5 A g −1 , superior to most of the reported transition-metalbased potassium-ion battery anode materials.
研究领域:
材料科学
·
电化学储能
·
纳米材料
·
能源化学
·
功能纤维材料
·
先进电池技术
✓ 已验证
DOI
高影响因子
Journal of CO2 Utilization
·
2017
·
IF 4.292
Lijun Zhao,Haiyang Cheng,Tong Liu,Yan Li,Zhong Ying,Wenjing Yang,Weiwei Lin,Xiangchun Meng,Chengxue Wang,Fengyu Zhao
An efficient green process was developed for production of p -aminophenol (PAP) from hydrogenation of nitrobenzene (NB) over a traditional Pt/Al 2 O 3 catalyst in a reaction medium of supercritical CO 2 (scCO 2 ) and H 2 O without any additional acid catalyst involved. The combination of scCO 2 and H 2 O was confirmed to be effective for the production of PAP. The acidity, aroused by the in situ formed carbonic acid, increased with CO 2 pressure, which acted as acid catalysis during the reaction, and it can easily self-neutralize by depressurization of CO 2 , resulting in a green and a intensive process for it removed the final neutralization and salts disposal of the traditional liquid acids. Under the optimal reaction conditions, a high yield to PAP (68.9%) was achieved at the high conversion of NB (98.5%). Moreover, the results of in situ diffuse reflectance FTIR spectra revealed that CO was generated by the reverse water-gas shift reaction (CO 2 + H 2 → CO + H 2 O), it can adsorbed on the surface of Pt/Al 2 O 3 to suppress the undesired deep hydrogenation of N -phenylhydroxylamine (PHA) to aniline (AN), which also contributed to the obtained high selectivity of PAP. Therefore, the present green and efficient catalysis process will arouse the interest of researchers in the fields of the green and sustainable organic synthesis.
研究领域:
绿色化学
·
有机合成
·
催化化学
·
环境友好工艺
·
工业化学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Jiajun Ma,Zongwei Guo,Shengtao Dai,Yannong Liu,Huiru Hu,Peikun Li,Lin Jin,Yuhui Ao
Inducing highly oriented 2D nanosheets to create a mussel-inspired interface phase on the carbon fiber (CF) surface to enhance its composites’ strength and toughness has become a great challenge. In this study, a novel coating was synthesized to induce the graphene oxide (GO) oriented distributed on the CF surface while constructing a biomimetic "Brick-and-Mortar" structural interface phase, which simultaneously promoted the strength and toughness of CF composites . Acting as a sizing agent, di-pyrene terminated PEG (py-PEG-py) facilitates abundant π-π* stacking interactions, and enables flexible chain segment motion during interface fracture of composites, as well as effectively improving the toughness of composites. Eventually, the formation of a superior mechanism on the CF surface results in remarkable properties for composites, including an interfacial shear strength (IFSS) of 99.3 MPa, interlaminar shear strength of 93.2 MPa, and flexural strength of 1430 MPa. The tensile strength and toughness increased to 1777 MPa and 45.0 MJm −3 , respectively. Simultaneously, the continuous thermal conduction pathway produced by the oriented attachment of GO on the CF surface increased in-plane thermal conductivity . The reinforcing mechanisms of the unique mussel-inspired coating were systematically investigated. This work opens up an effective and scalability avenue for obtaining high-performance CF composites.
研究领域:
材料科学
·
复合材料工程
·
界面化学
·
高分子化学
·
纳米材料学
·
仿生材料
·
力学性能
·
热传导
✓ 已验证
DOI
高影响因子
Small
·
2019
·Vol. 15
·期 48
·1901527
·
IF 10.856
Zhaofeng Zhai,Bing Leng,Nianjun Yang,Bing Yang,Lusheng Liu,Nan Huang,Xin Jiang
Tremendous demands for highly sensitive and selective nonenzymatic electrochemical biosensors have motivated intensive research on advanced electrode materials with high electrocatalytic activity. Herein, the 3D-networked CuO@carbon nanowalls/diamond (C/D) architecture is rationally designed, and it demonstrates wide linear range (0.5 × 10 −6 –4 × 10 −3 m ), high sensitivity (1650 µA cm −2 m m −1 ), and low detection limit (0.5 × 10 −6 m ), together with high selectivity, great long-term stability, and good reproducibility in glucose determination. The outstanding performance of the CuO@C/D electrode can be ascribed to the synergistic effect coming from high-electrocatalytic-activity CuO nanoparticles and 3D-networked conductive C/D film. The C/D film is composed of carbon nanowalls and diamond nanoplatelets; and owing to the large surface area, accessible open surfaces, and high electrical conduction, it works as an excellent transducer, greatly accelerating the mass- and charge-transport kinetics of electrocatalytic reaction on the CuO biorecognition element. Besides, the vertical aligned diamond nanoplatelet scaffolds could improve structural and mechanical stability of the designed electrode in long-term performance. The excellent CuO@C/D electrode promises potential application in practical glucose detection, and the strategy proposed here can also be extended to construct other biorecognition elements on the 3D-networked conductive C/D transducer for various high-performance nonenzymatic electrochemical biosensors.
研究领域:
生物医学工程
·
纳米医学
·
电化学传感
·
生物传感器
·
材料科学
·
分子诊断
·
转化医学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 5
·期 8
·5604-5610
·
IF 3.708
Mei Yu,Jindan Zhang,Songmei Li,Yanbing Meng,Jianhua Liu
The performances of photovoltaic devices can be improved by increasing light-harvesting and charge collection respectively. The design and synthesis of nanocomposites with the ability of enhancing the generation and collection of the photo-generated electrons provide a significant way to improve the power conversion efficiency (PCE). Herein, SWNTs@(TiO2/Ag/Au) nanocomposites were synthesized and successfully integrated into photoanode films of dye-sensitized solar cells (DSSCs) to improve the power conversion efficiency. The synthesis processes were based on multi-functional DNA. DNA not only works as a dispersing agent preventing SWNTs bundling but also as a sacrificial mold assembling TiO2, Ag and Au nanoparticles on the surface of the SWNTs. The synthesized SWNTs@(TiO2/Ag/Au) nanocomposites enhance the charge collection and light-harvesting of DSSCs simultaneously. With 2.45 wt% SWNTs@(TiO2/Ag/Au) nanocomposites incorporating into the photoanode films, the PCE of the DSSCs increases from 6.8% to 8.3%.
研究领域:
材料科学
·
纳米科技
·
能源化学
·
光伏器件
·
表面科学
·
胶体与界面化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Cheng Li,Guangyu Li,Yongtao Zhan,Chenzhao Liu,Yujie Tang,Dong Yan,Jian Li,Lichao Jia
A strategy of in-stack dry reforming of methane (DRM) is proposed by using La 0.6 Sr 0.2 Cr 0.85 Ni 0.15 O 3-δ -loaded Ni foam (LSCrN@NF) as a CH 4 –CO 2 reformer, fuel gas distributor, and anode current collector in a SOFC stack. The prepared LSCrN exists as a single phase in a perovskite structure ; its reduced form contains exsolved Ni nanoparticles embedded on the surface of the LSCrN substrate. Introduced into an NF, the reduced LSCrN@NF demonstrates high DRM activity that increases with the increase of LSCrN amount to an optimum of about 42%. With the LSCrN@NF in-stack DRM, the conversions of CH 4 and CO 2 into CO and H 2 increase. Thus, the electrode polarization resistance, including the cathode and anode , decreases to 0.62, 1.07, and 3.93 Ω cm 2 at 800 °C, 750 °C, and 700 °C, respectively. Consequently, the peak power density (PPD) of the cell using 45% CH 4 -45% CO 2 –10% N 2 as fuel is 1.17, 0.94, and 0.47 W cm −2 , significantly higher than that of the cell without LSCrN@NF in-stack DRM. In addition, the voltage of the cell with LSCrN@NF in-stack DRM is stable on a level between 0.81 and 0.82 V at 400 mA cm −2 and 750 °C for 270 h without detected carbon deposition in the Ni–Y 2 O 3 stabilized ZrO 2 anode. This LSCrN@NF in-stack DRM strategy is also adopted with a large-scale (13 × 13 cm 2 ) single cell, which shows an extrapolated PPD of 428.3 mW cm −2 at 750 °C and is operated for 40 h at 400 mA cm −2 without noticeable performance degradation .
研究领域:
能源材料
·
电化学工程
·
催化化学
·
燃料电池技术
·
高温材料科学
·
化学反应工程
·
清洁能源转化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）