Materials
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2023
·Vol. 16
·期 8
·2968
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IF 3.4
Sanchuan Liu,Yujun Tang,Chengyu Guo,Yonggang Liu,Zhenghua Tang
Developing cost-effective, efficient, and durable catalysts for oxygen evolution reactions (OER) is the key for promoting large-scale H2production through electrochemical water splitting. Herein, we report a facile method for fabricating an NiFe@NiCr-LDH catalyst toward alkaline OER. The electronic microscopy technique revealed that it has a well-defined heterostructure at the interface between the NiFe and NiCr phases. In 1.0 M KOH, the as-prepared NiFe@NiCr-LDH catalyst shows excellent catalytic performance, evidenced by an overpotential of 266 mV at the current density of 10 mA cm−2and a small Tafel slope of 63 mV dec−1; both are comparable with the RuO2benchmark catalyst. It also exhibits robust durability in long-term operation, manifested by a 10% current decay in 20 h, which is superior to that of the RuO2catalyst. Such excellent performance is attributed to the interfacial electron transfer that occurs at the interfaces of the heterostructure, and the Fe(III) species facilitate the formation of Ni(III) species as active sites in NiFe@NiCr-LDH. This study offers a feasible strategy for preparing a transition metal-based LDH catalyst for OER toward H2production and other electrochemical energy technologies.Keywords:heterostructure;NiFe@NiCr-LDH;oxygen evolution reaction;synergistic effect;long-term stability
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2023
·
IF 5
Song Liu,Li Wan,Feifan Hu,Zhiwei Wen,Ming Cao,Fanrong Ai
Conductive hydrogels, a type of intrinsically flexible and conductive materials, are frequently employed in soft electronics. However, because water-based hydrogels can easily freeze and dry, their long-term stability is considerably limited. Herein, a glycerol (Gly)–water binary antifreezing and antidrying hydrogel was prepared by using glycine with water as a solvent, followed by the introduction of cationic polysaccharide chitosan quaternary ammonium salts into the covalently cross-linked polyacrylamide network and addition of NaCl ions to adjust the ionic conductivity of the hydrogel. In a broad temperature range, the produced hydrogel was used for tensile and sensitive strain sensing. Because strong hydrogen bonds between Gly and water molecules are easily established, the resultant organohydrogels have good freezing and drying endurance, retaining long-term deformation even at negative temperatures. Moreover, the hydrogel exhibits good adhesion and tensile properties because of the addition of chitosan quaternary ammonium salts. At the same time, strain sensors fabricated using the hydrogel exhibit a wide operating strain range (≈1000%) and good sensitivity, stability, and repeatability, making them promising candidates for building gel-based strain sensor platforms.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2019
·
IF 4.916
Lin Yu,Jingyuan Liu,Wenyan Yin,Jing Yu,Rongrong Chen,Dalei Song,Qi Liu,Rumin Li,Jun Wang
Ionic liquids are promising electrolytes for electrochemical gas sensors that have unique physicochemical properties such as negligible vapor pressure and high thermal stability. The modification of ionic liquid (IL) by combining metal oxide with reduced graphene oxide (rGO) is an effective method to improve its gas-sensing properties. In this study, the mesoporous structure of NiCo 2 O 4 /rGO is synthesized by simple one-step method, and the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF 6 ]) is mixed with it to form the composite material NiCo 2 O 4 /rGO/[BMIM][PF 6 ]. Electrochemical test results indicate that the three electrolytes exhibit response current and long-term stability in the oxygen environment. The oxygen sensor based on NiCo 2 O 4 /rGO/[BMIM][PF 6 ] significantly improves the response current and working stability of pure ionic liquid. The sensitivity of the sensor is 0.1087 μA/[%O 2 ], and the linear regression coefficient of the reduction peak current calibration curve is 0.9995. After continuous cyclic voltammetry , the reduction peak current remains at 90% of the initial current value. The interaction of IL and NiCo 2 O 4 /rGO significantly enhances electrochemical oxygen sensing performance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
RARE METALS
·
2024
·
IF 9.6
Li Jia-Hong,Chen Hao,You Si-Hang,Yang Gan-Xin,Liu Peng,Gao Meng-Qi,Chen Shu-Guang,Zhang Fei-Fei
Owing to the significant potential of alkaline seawater electrolysis for converting surplus power into eco-friendly hydrogen fuel, we developed bifunctional electrodes that integrate low-crystalline NiFe LDHs and amorphous NiFe alloy on a Ni foam (NF) substrate to enhance this process. Driven by the battery-like characteristics of NiFe LDHs, an anti-corrosive and active outer layer of NiFe vac OOH continuously forms over time in the hybrid on the anode for the oxygen evolution reaction (OER), effectively mitigating powder shedding caused by corrosion induced by multiple anions in seawater. Meanwhile, the strong bond between the hybrid and the NF substrate maintains intact hybrid coatings to ensure a relatively high overall conductivity of the electrodes, significantly reducing the negative effects of structural degradation during the OER and hydrogen evolution reaction (HER), as well as the accumulation of contaminants on the electrode surfaces. In long-term tests, these bifunctional hybrid electrodes maintained stable performance, even at a high current density of 500 mA·cm −2 . The cell voltage increased by only 88 mV over 1000 h to 1.970 V during saline electrolysis and by 103 mV over 500 h to 2.062 V during seawater electrolysis. Hence, this study provides valuable insights into efficient and stable seawater electrolysis using NiFe LDHs–NiFe alloy hybrids. Graphical abstract
研究领域:
材料科学
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电化学
·
可再生能源
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
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2024
·
IF 14
Haixuan Yu,Zhiguo Zhang,Huaxia Ban,Xiongjie Li,Zhirong Liu,Junyi Huang,Wanpeng Yang,Yan Shen,Mingkui Wang
The lead-free inorganic perovskite CsSnI 3 is considered as one of the best candidates for emerging photovoltaics. Nevertheless, CsSnI 3 -based perovskite solar cells experience a significant drop in performance due to the nonradiative recombination facilitated by trapping. Here, we show an electron donor passivation method to regulate deep-level defects for CsSnI 3 perovskite with electron donor pyrrole. Experimental observations combined with theoretical simulations verify that the saturation of Tin dangling bonds with pyrrole on the CsSnI 3 surface via a Lewis acid-base addition reaction can significantly reduce the density of deep-level defects. Consequently, the printable mesoporous perovskite solar cells with an FTO/compact-TiO 2 /mesoporous-TiO 2 /Al 2 O 3 /NiO/carbon framework device structure penetrated with CsSnI 3 achieve a power conversion efficiency of up to 10.11%. To our knowledge, this represents the highest efficiency reported to date for lead-free perovskite-based printable mesoporous solar cells. Furthermore, the unencapsulated devices demonstrated remarkable long-term stability, retaining 92% of their initial efficiency even after 2400 h of aging in a nitrogen atmosphere.
研究领域:
材料科学
·
太阳能电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Ke Chen,Xin Guo,Linhan Ni,Junwen Qi,Jiansheng Li
Rational design and construction of fillers and polymers are crucial for the development of high-performance mixed matrix membranes (MMMs). In this work, amino-functionalized metal-organic frameworks KAUST-7 (KAUST-7-NH 2 ) with square-shaped sheet morphology were utilized as fillers to fabricate MMMs by physical blending with the polymer of intrinsic microporosity (PIM-1). The square-shaped KAUST-7-NH 2 sheets, prepared via in situ replacement of 2-aminopyrazine into the KAUST-7 framework, exhibited superior separation performance compared to the mono-ligand KAUST-7. Benefiting from the strong CO 2 affinity, high porosity and optimal pore sizes of KAUST-7-NH 2 , the outstanding CO 2 /CH 4 separation performance of the composite membrane was observed. The integration of square-shaped KAUST-7-NH 2 sheets provides a 2.5-fold improvement in CO 2 /CH 4 selectivity together with acceptable gas permeability as compared to the original PIM-1 membrane. Furthermore, a 100-h continuous permeation test validated the stability of the fabricated MMMs. Remarkably, the resulting MMM retained 92% of their initial CO 2 permeability after 150 days (drop of only 249 Barrer), indicating that the reduction in CO 2 permeability was approximately 10-fold lower than that of the pristine PIM-1 membrane. The prepared MMMs exhibit enhanced CO 2 /CH 4 selectivity and long-term stability, making it a highly promising candidate for practical application.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Minmin Wang,Li Zhou,Zukun Li,Hao Xu,Yanfeng Tang
Developing highly active, highly stable, and cheap electrocatalysts for water splitting is of great significance for hydrogen production. Herein, we report an amorphous Ni(OH)2-clothed transition Ni8P3 catalyst, in which the amorphous Ni(OH)2 shell provides catalytic active sites and serves as a proton conductive encapsulation layer to ensure efficient proton supply to the active Ni8P3 sites. As expected, the Ni8P3@Ni(OH)2 catalyst exhibits significant water decomposition performance at low and high current densities of 10, 100, and 1000 mA cm–2 at 1.45, 1.71, and 2.21 V, respectively, which is comparable to those of commercial electrocatalysts. In particular, the prepared Ni8P3@Ni(OH)2 electrodes possess exceptional long-term durability (200 h) at high current (over 1 A). The significantly improved water-splitting activity and durability in alkaline medium are expected to make them attractive catalyst materials to produce renewable chemical fuels.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Kaihua Li,Yuchao Ma,Wei Zhao,Leixin Yang,Jinwei Zhang,Qian Zhang,Xiaohua Ma,Long Jiao,Zhen Yin,Bowen Cheng
The challenges of trade-off effect and long-term stability pose huge obstacles in the application of polymer-based gas separation membranes. In this study, we proposed a novel strategy to overcome these problems by in-situ thermally treating ZIF-8/polyimide mixed-matrix membranes (MMMs) at 300 °C. After thermally treatment, the T-ZIF-8 produced some unsaturated Zn site as defects that decreased BET surface area and the shrunk of micropore size as compared with ZIF-8. The MMMs with T-ZIF-8 significantly affects their gas separation performance and long-term stability, in which, the H 2 /CH 4 and CO 2 /CH 4 separation performance of T-ZIF-8/PI(3:10) and T-ZIF-8/PI(6:10) increased from far below the 2008 trade off lines for their PI matrix to approach or even above that. Additionally, both higher permeability and selectivity were observed for T-ZIF-8/PI(6:10) as compared with its precursor for H 2 /CH 4 separation, which was contributed by its higher H 2 diffusion coefficient (3834 vs 580 × 10 -8 cm 2 s −1 ) and H 2 /CH 4 diffusion selectivity (240 vs 154). Furthermore, the T-ZIF-8/PI (1:10) and T-ZIF-8/PI(3:10) MMMs demonstrate less than 15 % H 2 decreasing after 150 days, which is much better than that of the pristine PI membrane (26.7 %). These results probably contributed by the defected ZIF-8 loading induced extra ultra-micropore that caused size sieving effect and strong interaction with polyimide matrix that formed more rigid polymer chains. These findings propose a strategy to effectively enhance the gas separation performance and long-term stability by in-situ introducing the defect MOF in the polymer matrix.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yifeng Chen,Yiduo Chen,Wenzhong Cao,Jing Wang,Peng Zhang,Jian Ji
Implantable cardiovascular devices have revolutionized the treatment of cardiovascular diseases, yet their long-term functionality without causing thrombosis is a persistent challenge. Although the surface modification of anticoagulant coating has greatly improved the biocompatibility of the devices, its long-term stability in complex physiological environments still remains questionable. Herein, the stability of three anticoagulant hydrogel coatings, poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC), poly(sodium 2-acryloyl-2-methylpropanesulfonate) (PAMPS), and poly(4-styrenesulfonate sodium) (PSS), is studied. The fabrication of these coatings onto device surfaces is validated by using X-ray photoelectron spectroscopy (XPS) and attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy. In vitro anticoagulation assays confirm the coatings’ significant anticoagulant effects. Among all three coatings, the PSS coating demonstrated superior chemical and mechanical stability in the comprehensive tests, showing great potential for improving the long-term anticoagulant performance of implantable cardiovascular devices.
研究领域:
生物医学工程
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材料科学
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心血管医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2024
·Vol. 17
·期 11
·2683
·
IF 3.1
Stephan Handschuh-Wang,Tao Wang,Zongyan Zhang,Fucheng Liu,Peigang Han,Xiaorui Liu
Thermal transport is of grave importance in many high-value applications. Heat dissipation can be improved by utilizing liquid metals as thermal interface materials. Yet, liquid metals exhibit corrosivity towards many metals used for heat sinks, such as aluminum, and other electrical devices (i.e., copper). The compatibility of the liquid metal with the heat sink or device material as well as its long-term stability are important performance variables for thermal management systems. Herein, the compatibility of the liquid metal Galinstan, a eutectic alloy of gallium, indium, and tin, with diamond coatings and the stability of the liquid metal in this environment are scrutinized. The liquid metal did not penetrate the diamond coating nor corrode it. However, the liquid metal solidified with the progression of time, starting from the second year. After 4 years of aging, the liquid metal on all samples solidified, which cannot be explained by the dissolution of aluminum from the titanium alloy. In contrast, the solidification arose from oxidation by oxygen, followed by hydrolysis to GaOOH due to the humidity in the air. The hydrolysis led to dealloying, where In and Sn remained an alloy while Ga separated as GaOOH. This hydrolysis has implications for many devices based on gallium alloys and should be considered during the design phase of liquid metal-enabled products.
研究领域:
材料科学
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热管理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Zhenguo Zhang,Jiahui Ren,Jingmei Xu,Zhe Wang,Wenwen He,Shuang Wang,Xudong Yang,Xinming Du,Lingxin Meng,Pengyun Zhao
Metal-organic frameworks-based hybrid proton exchange membranes could combine the advantages of organic and inorganic materials with excellent chemical and physical stability and good proton conductivity. In this work, two kinds of functionalized MOFs were synthesized based on MOF-801. Imidazole@MOF-801 was prepared by the impregnation method, which mainly incorporated free imidazole molecules into the pores of the MOF-801. Imidazole-MOF-801 was obtained by in-situ method, which imidazole further acted as non-structural ligands to coordinate to the zirconium metal sites. Furthermore, the hybrid membranes were fabricated with synthesized MOFs as fillers and sulfonated poly (arylene ether ketone sulfone) containing carboxyl groups (C-SPAEKS) as organic matrix. The structures and morphologies of the prepared MOFs and hybrid membranes were characterized by 1 H NMR, XRD , FT-IR and SEM. The PXRD results showed that Im@MOF-801 and Im-MOF-801 exhibited excellent stabilities in both water and acid. The proton conductivities of these hybrid membranes were much higher (0.023–0.066 S cm −1 at 30 °C, 0.050–0.128 S cm −1 at 90 °C) than that of pure C-SPAEKS (0.010S cm −1 at 30 °C, 0.024 S cm −1 at 90 °C). Moreover, C-SPAEKS/Im-MOF-801-4% could maintain a stable proton conductivity for more than 100 h. These results indicate that these hybrid membranes have potential as proton exchange membranes.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Kun Wang,Hongliang Zhang,Guoxin Chen,Tian Tian,Kai Tao,Lingyan Liang,Junhua Gao,Hongtao Cao
The complementary electrochromic devices based on WO 3 and Prussian blue electrodes (PB) have shown a limited chemical stability and durability because WO 3 is degraded in electrochromic performance and PB is gradually dissolved in the Li + -based electrolyte under neutral pH conditions. Herein, the utilization of acetic acid as super-additive solution was proposed to improve WO 3 cathodes and stabilize PB anodes, in which the highly nanoporous nanocrystal-in-glass WO 3 and hierarchical PB was made by electron beam evaporation and electrochemical deposition method, respectively. Our findings suggest that synergistic effects of Li + and H + on WO 3 and Prussian blue electrodes contribute to the improvement on electrochemical, electrochromic, and cycling stability performance of the whole device. Impressively, the WO 3 -PB complementary electrochromic device could experience a superior long-term cycling stability of over 10,000 cycles, with a high coloration efficiency of 137.80 cm 2 C −1 and a maximum transmittance modulation of 66.22%@ 633 nm. All these results open a new way to the construction of high-performance electrochromic devices.
研究领域:
材料科学
·
电化学
✓ 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）