Journal of Materials Research and Technology-JMR&T
·
2025
·
IF 6.6
Shenye Chen,Zhengjian Su,Bingyu Xue,Benxi Xu,Yafei Cheng,Kun Wang,Yidi Li,Zhengyi Fu
Rodent enamel is primarily composed of hydroxyapatite (HAP) nanowires and Fe 3+ -rich amorphous intergranular phases (AIP). Inspired by rodent tooth enamel, this study successfully formed a layer of Fe 3+ -rich AIP on the outer layer of HAP nanowires by ion exchange between Fe 3+ and Ca 2+ within the HAP lattice. The thermal stability of Fe-HAP nanowires with Fe 3+ -rich AIP was enhanced. By bi-directional freezing of Fe-HAP nanowires with polyvinyl alcohol (PVA), rodent enamel-like nanocomposites (Fe-HEN) were obtained. Owing to the reinforcing and toughening effect of Fe 3+ -rich AIP, Fe-HEN exhibited a hardness of 1.66 ± 0.23 GPa, a Young's modulus of 48.8 ± 6.7 GPa in the longitudinal direction, as well as a hardness of 1.38 ± 0.16 GPa and a Young's modulus of 40.2 ± 3.0 GPa in the transversal direction. The flexural strength of the sample reached 153.5 ± 5.0 MPa, which is 2.9 times higher than that of samples without AIP, surpassing the performance of natural rodent enamel. The compressive strength reached 205 ± 4.3 MPa, representing a 1.5-fold increase over the sample without AIP and comparable to that of natural enamel. Compared to samples without AIP, Fe-HEN exhibits superior fracture toughness and crack deflection, better corrosion resistance, owing to the reinforcing effect of Fe 3+ -rich AIP at nanowire interfaces. This study demonstrates the incorporation of amorphous reinforced structures into the tooth enamel-like materials via ion exchange, offering a promising strategy for the development of high-performance multiscale composites.
研究领域:
材料科学
·
牙科医学
·
仿生学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Nan Zhang,Shanshan Huang,Lu Chen,Yue Li,Min Tang,Qunyue Pei,Jian Liu
It is important to develop electrocatalysts that are cheap and have high activity for hydrogen evolution reaction (HER). In this work, Ni 3 S 2 /NiMoS with amorphous phase and unique candied-haws shaped nanoarray structure was successfully grown on nickel foam (Ni 3 S 2 /NiMoS/NF) as efficient HER catalyst. Combining Ni 3 S 2 with NiMoS resulted in the extension of the heterointerfaces between the materials, which facilitated the HER process in alkaline medium. The amorphous Ni 3 S 2 /NiMoS with disordered atom arrangement provided abundant active sites. Also, the unique morphology of the catalytic electrode simultaneously enabled it exhibit superhydrophilicity and underwater superaerophobicity. It is beneficial for the sufficient diffusion of the electrolyte onto the catalyst surface and the fast departure of hydrogen bubbles from the surface. As a result, the activity of Ni 3 S 2 /NiMoS/NF was higher than that of Pt/C even at high current densities. It is very valuable for industrial applications that require high current density. The superior stability of Ni 3 S 2 /NiMoS/NF compared to Pt/C further demonstrated that this catalytic electrode has potential for industrial applications.
研究领域:
材料科学
·
电化学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Haijuan Zhang,Daqin Guan,Zhiwei Hu,Yu-Cheng Huang,Xinhao Wu,Jie Dai,Chung-Li Dong,Xiaomin Xu,Hong-Ji Lin,Chien-Te Chen,Wei Zhou,Zongping Shao
The development of crystalline-amorphous phase for oxygen-evolving reaction (OER) in water splitting is lagging, and the underlying catalysis mechanism is still unknown. Here, we can facilely construct electrochemistry-induced crystalline-amorphous phase in hybrid La 0.33 SrCo 0.5 Fe 0.5 O x (H-LSCF) nanofibers based on the behavior of high-valence cubic perovskites and Ruddlesden-Popper perovskites after the OER, where such unique combination can be artificially modulated. This nano-sized combination surpasses its pure-phase counterparts and exhibits ultra-low overpotentials of 260 mV and 240 mV at 10 mA cm −2 in 0.1 M and 1 M KOH, respectively, which can be ascribed to their favorable solid-liquid contact, higher Co valence and stronger Co-O covalency to accelerate OER electron transport. The beneficial changes in various surface properties of H-LSCF ensure its stability for 80 h and 60 h in 0.1 M and 1 M KOH, respectively. In -situ 18 O isotope-labelled experiments directly reveal that such combination can trigger exceptional lattice-oxygen activation mechanism.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Shuwen Zhao,Yifan Zhao,Ji Chen,Ruijie Dai,Weijie Zhou,Jinpeng Yang,Xuan Zhao,Zhengang Chen,Yao Zhou,Hua Zhang,Anran Chen
To solve the problem of low hydrogen production efficiency from water electrolysis, increasing research is focusing on improving the efficiency of the complex oxygen evolution reaction (OER) that occurs at the anode. The preparation of high-efficiency OER electrocatalysts is key to improving the OER efficiency and the only way forward. In this work, a NiFeCo ternary OER high-efficiency electrocatalyst, NiFeCoP@CAP/NF, comprising coexisting crystalline and amorphous phases (CAP), was prepared on nickel foam (NF) by a simple one-step hydrothermal reaction and high-temperature gas-phase phosphating. The as-synthesized catalyst exhibits an ultralow overpotential of 202 mV (10 mA cm −2 ) in 1 M KOH solution with a Tafel slope (η10 = 202 mV) of 28.9 mV dec −1 . Further, it is understood that owing to the combination of the crystalline and amorphous phases, the catalyst can rapidly transform the amorphous phase into the true active (NiOOH) phase of the OER process while retaining the fast charge transport properties of the crystalline phase, as observed by in situ Raman analysis.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yu Jin,Xiang Han,Jiafei Su,Ruojing Li,Zhen Gao,Hanyue Guo,Jiaxin Zheng,Xiaodong Zhang,Shiping Cheng,Yanling Li,Lingwei Xue,Xiaoqiang Luo,Juan Wang,Wei Ma,Yongjun Han
Ultrafine platinum (Pt)-based nanowires (NWs) have emerged as a highly promising type of materials for multifunctional electrocatalysts. However, to achieve their synthesis presents significant challenges via relatively facile strategies, especially for multicomponent Pt-based NWs, due to the substantial variation in reduction potentials among different precursors and the tough coordination required for nanocrystal nucleation and growth. Herein, ultrathin NWs composed by Pt, Se, and Cd were realized via a facile one-pot synthesis where only involving precursors, reducing agent and solvent. Moreover, the prepared NWs embed the joint advantages of multicomponent, partial amorphous, ultrafine size, abundant grain boundaries and surface-defect-sites meanwhile. Thus, the ultrahigh methanol oxidation reaction (MOR) activity of 2.94 A mg Pt −1 and superior catalytic stability were achieved for Pt-Se-Cd NWs, transcending the most of Pt-based catalysts. Density functional theory calculation suggests that the outstanding MOR activity was attributed to the weakened CO poisoning and optimized adsorption of *CH 3 OH. Apart from MOR, Pt-Se-Cd NWs are also with remarkable activities for ethanol oxidation reaction (EOR) and hydrogen evolution reaction (HER). Se precursor plays a key role on NWs formation and amorphous regulation, based on which more Pt-Se-M NWs (M = Zn, In, CdZn, ZnIn, CdInZn) were fabricated successfully, revealing a superior generalization in NW synthesis. The work may not only highlight a facile synthesis for ultrafine Pt-based NWs with abundant catalytic advantages, but also explore their potential applications in electrocatalysis and beyond.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Zhaoyang Wang,Fangyu Xiong,Haizheng Tao,Yuanzheng Yue
To optimize the Na 0·74 CoO 2 -based cathode materials for sodium-ion batteries, we fabricated a series of Na 0·74 CoO 2 /C/N-based composites by sintering the mixtures of ZIF-4(Co) (Co [H 2 C 3 N 2 ] 2 ) and Na 2 CO 3 , which possess various molar Na/Co ratios (X = 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2 and 2.0), at 800 °C for 6 h. By performing the electrochemical characterizations, we found that the composite with X = 0.7 (NC-0.7) exhibits the optimum sodium storage performance, i.e., excellent Na + storage capacity (107.9 mA h g −1 at 0.1 C), and high cycling stability (74% of the discharge capacity retention after 500 cycles at 10 C). In addition, for this NC-0.7 composite, we discovered a large difference (48.1 mA h g −1 ) between the charging (59.8 mA h g −1 ) and discharging (107.9 mA h g −1 ) capacities for the first cycle. Using the X-ray photoelectron spectroscopy, high-resolution transmission electron microscopy, and scanning transmission electron microscope, we clarified the atomic-scale origin of the large capacity difference, and revealed the role of the amorphous phase in the as-prepared Na 0·74 CoO 2 /C/N composite cathode.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 28
·期 51
·e202200683
·
IF 5.02
Yanling Qiu,Zhiqiang Liu,Qian Yang,Xinyue Zhang,Jingquan Liu,Mengyao Liu,Tianyi Bi,Xuqiang Ji
Graphical A multistep chain reaction at atmospheric temperature restructures the surface of high-crystallinity cobalt carbonate hydroxides (CCHs). An ultrathin (∼5 nm) lattice-disorder layer of Fe(OH) 3 on the CCH appeared to form CCH−FeOH hetero-interfaces, which are of great benefit for nano-interface exposure. The microscopic surface morphology of the material (CCH−FeOH-D x ) can be controlled by adjusting the degree of chain reaction. The as-obtained CCH−FeOH with an ultrathin shell structure is conducive to mass transfer and ion migration, giving excellent HER/OER performance. Combining the self-sacrifice of a highly crystalline substance to design a multistep chain reaction towards ultrathin active-layer construction for high-performance water splitting with atmospheric-temperature conditions and an environmentally benign aqueous environment is extremely intriguing and full of challenges. Here, taking cobalt carbonate hydroxides (CCHs) as the initial crystalline material, we choose the Lewis acid metal salt of Fe(NO 3 ) 3 to induce an aqueous-phase chain reaction generating free CO 3 2− ions with subsequent instant FeCO 3 hydrolysis. The resultant ultrathin (∼5 nm) amorphous Fe-based hydroxide layer on CCH results in considerable activity in catalyzing the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), yielding 10/50 mA ⋅ cm −2 at overpotentials of 230/266.5 mV for OER and 72.5/197.5 mV for HER. The catalysts can operate constantly in 1.0 M KOH over 48 and 45 h for the OER and HER, respectively. For bifunctional catalysis for alkaline electrolyzer assembly, a cell voltage as low as 1.53 V was necessary to yield 10 mA cm −2 (1.7 V at 50 mA cm −2 ). This work rationally builds high-efficiency electrochemical bifunctional water-splitting catalysts and offers a trial in establishing a controllable nanolevel ultrathin lattice disorder layer through an atmospheric-temperature chemical route.
研究领域:
材料科学
·
化学工程
·
纳米技术
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2014
·Vol. 39
·期 7
·3313-3319
·
IF 2.93
Jing Lin,Fei Liang,Yaoming Wu,Wanqiang Liu,Limin Wang
We prepared Ti 1.4 V 0.6 Ni ribbons by arc-melting and subsequent melt-spinning techniques. Ti 1.4 V 0.6 Ni + x Mg ( x = 1, 1.5, 2, 2.5 and 3, wt.%) composite alloys were obtained by the mechanical ball-milling method. The structures and hydrogen storage properties of alloys were investigated. Ti 1.4 V 0.6 Ni + x Mg composite alloys contained icosahedral quasicrystalline phase, Ti 2 Ni-type phase, β-Ti solid-solution phase and metallic Mg. The electrochemical and gaseous hydrogen storage properties of alloys were improved with Mg addition. Ti 1.4 V 0.6 Ni + 2 Mg alloy showed maximum electrochemical discharge capacity of 282.5 mAh g −1 as well as copacetic high-rate discharge ability of 82.3% at the discharge current density of 240 mA g −1 compared with that of 30 mA g −1 , and the cycling life achieved above 200 mAh g −1 after 50 consecutive cycles of charging and discharging. The hydrogen absorption/desorption properties of Ti 1.4 V 0.6 Ni + x Mg ( x = 1, 2 and 3, wt.%) alloys were better than Ti 1.4 V 0.6 Ni. Ti 1.4 V 0.6 Ni + 3 Mg alloy also exhibited a favorable hydrogen absorption capacity of 1.53 wt.%. The improvement in the hydrogen storage characteristics caused by adding Mg may be ascribed to better hydrogen diffusion and anti-corrosion ability.
研究领域:
材料科学
·
金属功能材料
·
储能材料
·
物理化学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Jianian Hu,Guoqiang Luo,Jian Zhang,Yi Sun,Qiang Shen,Lianmeng Zhang
TaC/SiC composites with 5 wt% SiC addition were densified by plasma-activated sintering (PAS) at 1500–1800 °C for 5 min under 30 MPa. The effects of plasma-activated sintering on microstructures, densification and mechanical properties of the composites were investigated. The results showed that TaC/SiC composites achieved a relative density more than 99% of the theoretical density at 1600 °C. A low eutectic liquid phase generated by the oxide on the particle surface was observed in the composite to realize a relatively low temperature sintering densification. While the TaC particle size decreased insignificantly with increasing sintering temperature, the transformation of morphology of SiC particles changing from equiaxed to elongated grain was activated, accompanying with a slight particle size decreasing of the SiC phase, thus promoting a relatively high flexural strength of 550 MPa under 1800 °C. Besides, some ultra-fine 2 nm Ta 2 Si was observed in the glassy pockets, strengthening the amorphous phase and thus increasing the flexural strength.
研究领域:
材料科学
·
机械工程
✓ 已验证
DOI
高影响因子
ANNALS OF NUCLEAR ENERGY
·
2020
·
IF 1.378
Guilin Wei,Fen Luo,Bingsheng Li,Yi Liu,Jingjun Yang,Zhentao Zhang,Yi Liu,Xiaoyan Shu,Yi Xie,Xirui Lu
This study mainly investigated the Bi 2 O 3 -B 2 O 3 -ZnO ternary glass to immobilize the iodine waste forms under low sintering temperatures (≤600 °C). Based on the results of Molecular Dynamic (MD) code GULP and amorphous fraction, the Bi 2 O 3 -B 2 O 3 -ZnO ternary glass with 20 mol% Bi 2 O 3 to be chosen to immobilize the sliver-coated silica gel with 10 wt%, 20 wt% and 30 wt% iodine loadings (total content of iodine is 8 wt%). The results show that the amorphous fraction are increased with temperature rising and the composition has dominant effect on determining the density results. The specimen with 20 wt% sintered at 600 °C has the highest amorphous fraction as 0.71. The SEM-EDS results reveal that part of iodine had been physically solidified in the form of white spots and the rest chemically solidified in the glassy phase. Our findings demonstrate the potential of Bi 2 O 3 -B 2 O 3 -ZnO ternary glass to immobilize iodine waste forms.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2019
·
IF 0
Hongjie Xu,Minjie Xuan,Weidong Xiao,Yonglong Shen,Zhenzhen Li,Zhuo Wang,Junhua Hu,Guosheng Shao
Solid electrolytes based on theoretically identified double antiperovskite phases Li6OSI2 were successfully synthesized. Experimental characterization supported the theoretical prediction that S substitution of O leads to stabilization of the double antiperovskite structure and lattice softening to significantly enhance ionic conductivity, so that the total Li+ conductivity in Li6.5OS1.5I1.5 was two to three orders better than that of the best stoichiometric antiperovskite phase Li3OCl. However, both antiperovskite and double antiperovskite materials are fundamentally susceptible to surface reconstruction, which is behind significant boundary resistances typically known for materials based on antiperovskite hali-chalcogenides. Such a surface related problem was then effectively reduced through amorphous phase formation, thus offering a feasible route to exploit the full potential of this class of new materials as competitive candidates for solid Li-ion batteries.
研究领域:
材料科学
·
固态电池研究
✓ 已验证
产品关联
DOI
CRYSTENGCOMM
·
2022
·Vol. 24
·期 23
·4312-4319
·
IF 3.756
Shiwen Cui,Yuan Su,Ting Cai
Although calcium pyrophosphates are commonly involved in crystal arthropathies, their formation mechanisms remain largely underexplored. Here, we investigated the crystallization pathway of calcium pyrophosphate tetrahydrate in the absence and presence of two biologically essential metal ions, Mg2+ and Sr2+, and another alkaline earth metal ion, Ba2+. The crystallization of calcium pyrophosphate tetrahydrate (CPPT) was found to proceed via a multistage process by first forming amorphous calcium pyrophosphate (ACPP), which then transformed into a crystalline phase. Alkaline earth metal ions can affect the process of CPPT crystallization by influencing the stability of the amorphous precursor and the subsequent crystal growth. Mg2+ exhibited the strongest effect on stabilizing ACPP, while Ba2+ showed a negligible effect on prolonging the lifetime of ACPP in solution. The surface adsorption of metal ions had a larger effect on the stability of ACPP than the bulk incorporation of metal ions. Interestingly, the ability of the metal-ion additives to inhibit ACPP crystallization was independent of their affinities to ACPP but correlated with their hydration abilities. These results suggest that the hydration characteristics of metal ions play more important roles in stabilizing ACPP than the content of adsorbed ions. These findings are relevant to understanding the pathogenesis of calcium pyrophosphate crystal deposition disease and the role of the metal ions involved in the process. This study also highlights the importance of the hydration characteristics of metal ions in regulating the stability of amorphous intermediate phases, providing a promising strategy for the precise control of biomineralization.
研究领域:
医学
·
生物化学
✓ 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）