JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 2
·D65
·
IF 3.12
Min Li,Ying Li,Zhaowen Wang
The electrochemical reduction of zirconium oxide in a molten salt of 2.4NaF·AlF3 (molar ratio = 2.4) was studied at 1273 K. Cyclic voltammetry results show that Zr(IV) ions are first reduced to an intermediate valence and, then, are co-deposited with aluminum to form an Al-Zr alloy. Potentiostatic electrolysis experiments were carried out at different potentials (−0.95 and −1.25 V) and at 1273 K, and the electrolysis products were characterized using SEM-EDS and XRD. The XRD analysis confirms that a mixture of cryolite molten salt and ZrO2 was electrodeposited at −0.95 V, while aluminum and Al3Zr were electrodeposited at −1.25 V. The SEM analysis shows that the aluminum and Al3Zr were in two different phases.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
Acta Biomaterialia
·
2023
·
IF 9.7
Chen Zhong,Haoran Zhu,Yinying Sheng,Jin Wo,Deqiang You,Guodong Sun,Zhentao Yu,Wei Li,Xiaojian Wang
Zinc alloys have demonstrated considerable potentials as implant materials for biodegradable vascular and orthopedic applications. However, the high initial release of Zn 2+ can trigger intense immune responses that impede tissue healing. To address this challenge and enhance the osteogenic capacity of zinc alloys, the surface of Zn1Mg was subjected to CO 2 plasma modification (Zn1Mg-PP) followed by grafting with choline phosphate chitosan (Zn1Mg-PP-PCCs). This study aims to investigate the in vitro and in vivo biocompatibility of the surface-modified Zn1Mg. The effect of the surface modification on the inflammatory response and osteogenic repair process was investigated. Compared with unmodified Zn1Mg, the degradation rate of Zn1Mg-PP-PCCs was significantly decreased, avoiding the cytotoxicity triggered by the release of large amounts of Zn 2+ . Moreover, PCCs significantly enhanced the cell-material adhesion, promoted the proliferation of osteoblasts (MC3T3-E1) and upregulated the expression of key osteogenic factors in vitro . Notably, the in vivo experiments revealed that the surface modification of Zn1Mg suppressed inhibited the expression of inflammatory cytokines, promoting the secretion of anti-inflammatory factors, thereby reducing inflammation and promoting bone tissue repair. Furthermore, histological analysis of tissue sections exhibited strong integration between the material and the bone, along with well-defined new bone formation and reduced osteoclast aggregation on the surface. This was attributed to the improved immune microenvironment by PCCs, which promoted osteogenic differentiation of osteoblasts. These findings highlight that the preparation of PCCs coatings on zinc alloy surfaces effectively inhibited ion release and modulated the immune environment to promote bone tissue repair. Statement of significance Surface modification of biodegradable Zn alloys facilitates the suppression of intense immune responses caused by excessive ion release concentrations from implants. We modified the surface of Zn1Mg with choline phosphate chitosan (PCCs) and investigated the effects of surface modification on the inflammatory response and osteogenic repair process. In vitro results showed that the PCCs coating effectively reduced the degradation rate of Zn1Mg to avoid cytotoxicity caused by high Zn 2+ concentration, favoring the proliferation of osteoblasts. In addition, in vivo results indicated that Zn1Mg-PP-PCCs attenuated inflammation to promote bone repair by modulating the release of inflammation-related factors. The surface-modified Zn1Mg implants demonstrated strong osseointegration, indicating that the PCCs coating effectively modulated the immune microenvironment and promoted bone healing.
研究领域:
材料科学
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生物医学工程
·
组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Yadong Li,Yaxuan Wang,Chen Yang,Lijuan Cao,Lirong Zheng,Lin Gu,Qinghua Zhang,Xilong Wang,Han-Pu Liang
Coupling the structure advantages of platinum (Pt)-based active composites, transition-metal single sites, and porous carbon is highly desirable to reduce the Pt usage in proton-exchange membrane fuel cells (PEMFCs) but remains a great challenge. Herein, we report the in situ construction of synergistic oxygen reduction reaction (ORR) catalysts with intermetallic PtZn alloy nanoparticles confined in mesoporous carbon doped with atomic Co–N4 and Zn–N4 moieties. Mesoporous carbon doped with Co–N4 and Zn–N4 moieties could be fabricated by carbonization of CoSO4-doped ZIF-8 precursors and SO42– has been verified to be responsible for the formation of mesopores and defects with narrow pore size distribution. More importantly, systematical characterizations revealed that Pt could in situ alloy with Zn–N4 sites, which could effectively prevent the agglomeration of Pt during high-temperature treatment, leading to the formation of uniform and well-dispersed PtZn nanoparticles with a mean diameter of ∼3.06 nm. The as-synthesized PtZn@Meso/Zn1Co1/NC shows an excellent mass activity of 490 mA mgPt–1 @ 0.9 V as well as excellent durability with an activity retention of 79% after 20,000 potential cycles in 0.1 M HClO4, showing that the nanoarchitecture of the mesopore-encased PtZn alloy has a high resistance to migration due to the pore confinement effect and anchoring effect of the support. In addition to developing robust Pt-based catalysts, this study also lays out a straightforward strategy for designing synergistic catalysts, which might have far-reaching implications for fuel cells and beyond.
研究领域:
材料科学
·
燃料电池催化
✓ 已验证
DOI
高影响因子
Nano Energy
·
2025
·
IF 17.1
Shuaitong Wang,Yang Liu,Jinrui Huang,Shizhe Liu,Shilong Li,Mengran Liu,Zhichao Ma,Tianfang Yang,Yingjie Yang,Shuyan Gao
Electrochemical reduction of nitrate to ammonia (NO 3 RR) is an emerging and environmentally sustainable approach for synthesizing ammonia (NH 3 ). However, the electrocatalytic NO 3 RR faces significant challenges of the slow kinetics of active hydrogen (*H) transfer and extreme dependence on conventional energy sources. Herein, we innovatively propose a novel strategy of layered spraying coupled with a Joule heating strategy to prepare a CuZn 5 alloy for enhancing the adsorption energy of *H and reducing the desorption energy of NH 3 , which is guided by density functional theory (DFT) calculations. The synthesized CuZn 5 alloy exhibits exceptional performance, with a remarkable NH 3 Faradaic efficiency reaching 98.4 % and an impressive yield rate of 420 μmol h −1 cm −2 . Furthermore, the CuZn 5 catalyst is integrated into a self-powered NO 3 RR system, which is powered by a high-performance triboelectric nanogenerator ( I max = 100 μA, V max = 600 V), achieving an NH 3 yield rate of 54.70 μmol h −1 cm −2 without the external power source. This study presents a novel method for the efficient preparation of NO 3 RR catalysts and offers a clean energy solution for the production of high-value chemicals.
研究领域:
材料科学
·
电化学
·
清洁能源
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wenjun Kang,Jiabao Chen,Yuanjie Zhang,Yajie Guo,Fanpeng Meng,Konggang Qu,Rui Li,Lei Wang,Zongge Li,Haibo Li
The fabrication of ordered noble metal alloys on carbon supports can effectively alter the electronic structure of the catalyst interface and the valence states of the elements, presenting a viable alternative to platinum (Pt) for the electrocatalysis of the oxygen reduction reaction (ORR) in metal–air battery cathodes. Herein, we developed a straightforward in situ reduction synthesis method that facilitates the formation of ordered PdZn alloy catalysts on hollow carbon under specific conditions, optimizing ORR efficiency. In an oxygen-saturated 0.1 M KOH solution, the ORR performance of the synthesized Pd 0.02 Zn-NC-900 catalyst exhibits an initial potential of ∼0.996 V and a half-wave potential of ∼0.887 V at 1600 rpm. When integrated into a zinc–air battery, it achieves a remarkable specific power of 213.7 mW cm −2 and a specific capacity of 813.8 mAh g Zn − 1 , outperforming commercial Pt/C. Our research focuses on the efficient synthesis of carbon-supported ordered PdZn alloys to address the needs of electrochemical energy conversion applications.
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 THE ELECTROCHEMICAL SOCIETY
·
2023
·Vol. 170
·期 10
·106501
·
IF 3.9
Fengming Zhao,Lili Zhao,Xinhang Wang,Huadong Hu,Yinghong Zhu,Youqun Chu,Wanli Chen
The content of chloroacetic acid in water is mandatory, so rapid and accurate detection is of great significance for environmental health. Silver has a strong specific interaction with chloridion and its three-dimensional interconnected ligaments are proved to have higher activity. Herein, a self-supported nanoporous skeleton was constructed on the surface of silver wire by directly electrochemical alloying in ZnCl2–glycol solution at 140 °C and subsequently dealloying in sulfuric acid solution. AgZn and AgZn3 alloys are formed by electrodeposition process, and the nanoporous skeleton of elemental silver is formed after dealloying. The interconnected ligaments are uniform and the pore size is about 10–200 nm. The cyclic voltammetry showed that the self-supported nanoporous skeleton of the silver wire electrode exhibited high electrocatalytic activity for trichloroacetic acid. Detected by chronoamperometry, the results show that the detection limit is 70 nM (S/N = 3) in the concentration range of 0.14–549 μM, and the sensor has high sensitivity, good reproducibility and anti-interference. And by detecting the recovery rate of trichloroacetic acid in the tap water, river water and industrial wastewater, the sensor proves the practicality of the prepared electrode.
研究领域:
环境科学
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材料科学
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分析化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jianxiong Xing,Luo Yan,Tao Chen,Zhicui Song,Zihao Wang,Yuchi Liu,Liujiang Zhou,Jingze Li
Lithium (Li)-rich ternary alloy, comprising a multi-alloy phase as the built-in three-dimensional (3D) framework and a Li metal phase as a reversible Li reservoir, is a promising high-energy–density anode for rechargeable Li metal batteries. The introduction of metal/metalloid components to the alloy can effectively regulate Li deposition and maintain the dimensional integrity of the Li anode. Herein, the lithium–copper–zinc (Li–Cu–Zn) ternary alloy, as a new type of alloy anode, is synthesized via a facile thermal melting method. The fully delithiated 3D scaffold comprised two Cu–Zn alloy phases named CuZn and CuZn 5 . These alloy phases exhibit higher lithiophilicity and structural stability than Li–Zn and Li–Cu alloys. Moreover, the CuZn phase is electrochemically inert, ensuring the geometric stability of the anode, while the CuZn 5 phase can readily undergo alloying reaction with Li to form the LiZn phase, thereby facilitating uniform Li nucleation and deposition. The hybridized multiphase alloy structure and specific energy storage mechanism of the Cu–Zn based alloy scaffold in the ternary alloy anode facilitate dendrite-free Li deposition and prolonged cycle lifetime. The Li metal full battery based on lithium iron phosphate (LiFePO 4 ) cathode exhibits high cycling stability with high-capacity retention of 95.4% after 1000 cycles at 1C.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Duo Zhang,Alvin Dai,Binfeng Fan,Yingen Li,Kang Shen,Teng Xiao,Guangya Hou,Huazhen Cao,XinYong Tao,Yiping Tang
Li dendrites are considered as the primary cause for degradation and inevitable short circuit in lithium-metal batteries (LMBs). Although contemporary strategies have shown potential for addressing dendrite growth, none have achieved complete elimination. In this paper, a dendrite-free, three-dimensional, ordered, macro/mesoporous Cu/Zn current collector was prepared using a combination of simple colloidal crystal template and electrochemical method (electrodeposition and pulse plating). When paired with a hierarchically structured mesoporous (20–50 nm) and macroporous (450 nm) anode, this novel current collector achieved stable charge/discharge cycles of over 2000 h and a small plating/stripping potential (≈8 mV) at a current density of 0.2 mA cm–2. Coulombic efficiencies (CE) also reached 94.7% after 400 cycles. This three-dimensional, ordered, macro/mesoporous structure provides a greater specific surface area, reduces local current density, and contains a lithiophilic Zn coating that serves as preferred Li nucleation sites. By combining these factors, dendrite-free Li deposition and superior electrochemical performance improvements in LMBs have been realized.
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
Acta Biomaterialia
·
2022
·
IF 10.633
Xian Tong,Yue Han,Runqi Zhou,Wanying Jiang,Li Zhu,Yuncang Li,Shengbin Huang,Jianfeng Ma,Cuie Wen,Jixing Lin
The unique combination of biodegradability , biocompatibility, and functionality of zinc (Zn)-based alloys makes them highly desirable for a wide range of medical applications. However, a long-standing problem associated with this family of biodegradable alloys in the as-cast state is their limited mechanical strength and slow degradation rate. Here we report the development of Zn-xDy (x = 1, 3, and 5 wt.%) alloys with high strength, ductility, cytocompatibility, antibacterial ability, and appropriate degradation rate for biodegradable bone-implant applications. Our results indicate that the mechanical properties of Zn–xDy alloys were effectively improved with increasing Dy addition and hot-rolling due to the second-phase strengthening. The hot-rolled (HR) Zn–3Dy alloy showed the best combined mechanical performance with an ultimate tensile strength of 270.5 MPa, a yield strength of 214.8 MPa, an elongation of 55.1%, and Brinell hardness of 75.9 HB. The corrosion and degradation rates of HR Zn–xDy alloys in Hanks’ solution gradually increased with increasing Dy addition due to the intensification of galvanic corrosion . The HR Zn–3Dy alloy showed high antibacterial ability against S. aureus and cytocompatibility toward MC3T3-E1 cells among all the HR alloys. Overall, the HR Zn–3Dy alloy can be considered a promising biodegradable material for bone implants. Statement of significance This work reports on Zn–xDy (x = 1, 3, and 5%) alloys fabricated by Dy alloying followed by hot-rolling for biodegradable bone-implant applications. Our findings demonstrate that the hot-rolled (HR) Zn–3Dy alloy showed the best combined mechanical performance with an ultimate tensile strength of 270.5 MPa, a yield strength of 214.8 MPa, an elongation of 55.1%, and Brinell hardness of 75.9 HB. The corrosion and degradation rates of HR Zn–xDy alloys in Hanks’ solution gradually increased with increasing Dy addition due to the intensification of galvanic corrosion. Furthermore, the HR Zn–3Dy alloy showed greater antibacterial ability against S. aureus and the best cytocompatibility toward MC3T3-E1 cells among all the HR alloys.
研究领域:
材料科学
·
生物医学工程
·
组织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Hongwei He,Zhoulin Ma,Shuya Zhang,An Cai,Huan Ye,Xiaobin Fan,Wenchao Peng,Yang Li
A palladium–zinc alloy nanoparticles decorated nitrogen-doped porous carbon catalyst (PdZn 30 –NC) was synthesized and utilized for Suzuki coupling reaction. The alloying palladium (Pd) with zinc (Zn) and pore expanding are realized simultaneously. Density functional theory (DFT) calculations and experimental studies reveal that the alloying Pd with Zn can lower the energy barrier in Suzuki coupling reaction. Nitrogen adsorption–desorption measurements uncover that pore expansion caused by the zinc nitrate hexahydrate assisted calcination gives rise to the multiplication of mesopore with a pore diameter of 6 nm, which facilitates mass transfer during the reaction. As a result, the alloying Pd with Zn and pore expanding together endow PdZn 30 –NC with excellent catalytic activity. PdZn 30 –NC demonstrates exceptional catalytic activity and stability in Suzuki coupling reaction. A high biphenyl yield of 97.7 % within 40 min and stable reusability of 93.3 % yield after five reuse cycles can be achieved. This work not only offers a viable method for Suzuki coupling reaction, but also provides insights for designing new catalysts toward Suzuki coupling reaction.
研究领域:
材料化学
·
催化反应
·
理论计算
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2025
·Vol. 18
·期 9
·2149
·
IF 3.2
Qingmeng Wang,Xiuli Wang,Xiaomin Cheng,Qianju Cheng,Yi Yang
In the fields of nuclear engineering and solar thermal utilization, low melting point alloys with excellent thermal conductivity and heat transfer performance have attracted extensive research as a new generation of heat transfer fluids, leading to many fundamental and important application issues. This study investigates the high-temperature corrosion behavior of Sn-50Bi-2Zn (wt.%) heat transfer alloy against 304 stainless steel (304), 310S heat-resistant steel (310S), and 20 carbon steel (20C) at 600 °C. Theoretical analysis, based on Fick’s diffusion law, and experimental measurements reveal significant differences in corrosion severity. After 473 h, 20 carbon steel exhibited the lowest corrosion layer thickness (0.07 mm), while 310S suffered the most severe corrosion (1.50 mm), exceeding 304SS (0.83 mm) by 81%. Diffusion coefficients derived from Sn penetration depths further quantified these trends: D310S = 2.51 × 10−7mm2/s (6.8 × higher than 304: 3.7 × 10−8mm2/s) and D20C = 2.87 × 10−10mm2/s (128 × lower than 304SS). XRF analysis confirmed the dissolution of steel components into the molten alloy, with Fe, Cr, and Ni content increasing to 0.382 wt.%, 0.417 wt.%, and 0.694 wt.%, respectively, after 480 h. These results underscore the critical role of Ni content in accelerating Sn/Zn diffusion and pore formation, providing actionable insights for material selection in high-temperature heat transfer systems.
研究领域:
材料科学
·
核工程
·
热能工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Research
·
2019
·Vol. 12
·期 5
·1173-1179
·
IF 8.515
Xu Yanchao,Cui Xiaoqiang,Wei Shuting,Zhang Qinghua,Gu Lin,Meng Fanqi,Fan Jinchang,Zheng Weitao
The development of highly efficient Pt-based alloy nanocatalysts is important but remains challenging for fuel cells commercialization. Here, a new class of zigzag-like platinum-zinc (Pt-Zn) alloy nanowires (NWs) with rough surface and controllable composition is reported. The merits of anisotropic one-dimensional nanostructure, stable high-index facets and coordinatively unsaturated Pt sites endow the composition-optimal Pt 94 Zn 6 NWs with a mass activity of 7.2 and 6.2 times higher than that of commercial Pt black catalysts toward methanol/ethanol oxidation, respectively. Alloying-induced d -band electron modulation and lattice strain effects weaken the adsorption strength of poisoning species, which originally enhances the catalytic activity of Pt-Zn NWs. This study provides a new perspective of Pt-Zn electrocatalysts with intrinsic mechanism for enhanced catalytic performance.
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）