CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Bo Yang,Jiaxing Zhang,Yunfei Zhang,Shubo Deng,Gang Yu,Jinhua Wu,Hong Zhang,Jianhong Liu
The low-cost Al–Ni alloy particles could achieve high dechlorination activity for 2-chlorophenol (2-CP) with the addition of tetrasodium EDTA (EDTA-4Na) in this study. The species of chelating agent, pH values, and the dosages of chelating agent were investigated for their effects on dechlorination efficiency of 2-CP in solution. EDTA-4Na presented the highest promoting effect for Al–Ni alloy in dechlorination process compared with other chelating agents, which is closely correlated with the conditional stability constant ( K f ′ ) of chelates formed. The optimized result showed that 0.389 mM of 2-CP was completely dechlorinated into phenol using 10 g L −1 of Al–Ni alloy and 10 mM of EDTA-4Na at initial pH 11.0 within 45-min reaction. Recycling tests of the alloy particles showed that Al–Ni alloy coupling with EDTA in aqueous solution exhibited high dechlorination activity and stability before being exhausted. The maintenance of Al–Ni alloy activity for dechlorination was mainly attributed to the promoting effect of EDTA-4Na on Al corrosion, the inherent structure of alloy with Ni crystal homogeneously dispersing into Al substrate, and the change of its surface morphology with more active sites formed by EDTA corrosion.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xinyue Teng,Zhenwei Wang,Feng Wen,Chaonan Liu,Zelei Zhang
Coarse intermetallic compounds present in aluminum (Al) alloys significantly increase their susceptibility to localized corrosion, creating a trade-off between strength and corrosion resistance. In this study, Al−Ni alloys with a homogeneous microstructure were obtained through electrodeposition using imidazolium ionic liquids (ILs). Theoretical calculations and spectral analyses revealed that Ni(II) existed as an octahedral coordination complex, [Ni(Al 2 Cl 7 ) 4 ] 2 − , in Lewis-acidic ILs. This complex interacted with the Al 2 Cl 7 − species, facilitating the co-deposition of Al and Ni into supersaturated solid solutions Al(Ni). These deposits exhibited superior hardness compared to as-cast counterparts, reaching 3.9 GPa for Al(Ni) with 4.1 at% Ni, while also demonstrating enhanced corrosion resistance over pure Al. This simultaneous improvement in hardness and corrosion resistance is attributed to the homogeneous structure and extended Ni solubility. Consequently, the electrodeposition of Al(Ni) supersaturated solid solutions presents a promising approach to optimizing strength and corrosion resistance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jiaming Wang,Guilong Liu,Huixian Zhong,Pengfei Song,Kang An,Ziyang Zhang,Ang Cao,Yuan Liu
In this work, Co δ+ -Co 2 C decorated-Co-Ni alloy nanoparticles (NPs) loaded on Mg-Al-O complex oxides were fabricated via an in-situ reduction and topochemical carbonization strategy by using hydrotalcite as the precursor. The Co δ+ -Co 2 C decorated-Co-Ni alloys were obtained via the following process: (I) after reduction, Co-Ni alloy was obtained and Co could donate electrons to Ni in the Co-Ni alloy NPs; (II) in syngas atmosphere, some of cobalt atoms on the surface of Co-Ni NPs reacted with CO and were converted to Co 2 C. Resultantly, in the reaction process, Co-Ni alloy NPs were transformed into Ni-Co alloy@Co-Co 2 C, a core-shell structure with Ni-Co alloy core and Co-Co 2 C shell. When used as the catalysts for direct ethanol synthesis (DES) from syngas, the bimetallic Co-Ni alloy@Co-Co 2 C catalyst performed excellent selectivity to ethanol, owing to the regulation of dissociatively and associatively adsorbed CO by Co δ+ -Co 2 C active sites formed on the surface of Co-Ni alloy NPs. Moreover, the mutual dilution between Co and Ni in the Co-Ni alloy NPs inhibited the generation of heavy hydrocarbons, further improving the selectivity to alcohols. The total alcohol selectivity of 43.0% and ethanol occupied 45.2 wt% could be reached over the optimal catalyst.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Dong Xiang,Xiangjie Bo,Xiaohui Gao,Chunmei Zhang,Cheng Du,Fuqin Zheng,Zhihua Zhuang,Ping Li,Liande Zhu,Wei Chen
As a crucial reaction of electrochemical water splitting, oxygen evolution reaction receives intensive and significant attention in recent years. Here, we develop a type of electrocatalyst with core@shell structure in the form of binary FeNi alloy nanoparticles coated by highly defective nitrogen-doped carbon shell with mesoporous architecture. The composite annealed at 800 °C with Fe/Ni ratio of 1:2 presents extremely high catalytic activity and durability for oxygen evolution in 1.0 M KOH electrolyte, which delivers a low overpotential of 273 mV to achieve a current density of 10 mA cm −2 and a small Tafel slope of 37.82 mV dec −1 . We find that appropriate Fe-doping to regulate the surface electronic structure around the active sites is responsible for boosting the electrocatalytic performance. Remarkably, hydroxyl groups introduced along with the Fe doping, acting as an active O radical to facilitate the adsorption of intermediates, are identified as another decisive factor to promote the intrinsic activity for the oxygen evolution reaction. Moreover, such an N-doped carbon shell endows the composite with enriched defects, high conductivity and satisfactory stability, favoring fast electron transfer kinetics. The substantially high catalytic performance of the fabricated binary metallic electrocatalyst makes it potential application in energy storage and conversion 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
Small
·
2024
·
IF 13
Quanshuo Wu,Junli Wang,Xuanbing Wang,Jinlong Wei,Jing Wang,Can Zhang,Ruidong Xu,Linjing Yang
The rational design of highly active and durable non-noble electrocatalysts for hydrogen evolution reaction (HER) is significantly important but technically challenging. Herein, a phosphor and cobalt dual doped copper–nickel alloy (P, Co–CuNi) electrocatalyst with high–efficient HER performance is prepared by one-step electrodeposition method and reported for the first time. As a result, P, Co–CuNi only requires an ultralow overpotential of 56 mV to drive the current density of 10 mA cm −2 , with remarkable stability for over 360 h, surpassing most previously reported transition metal-based materials. It is discovered that the P doping can simultaneously increase the electrical conductivity and enhance the corrosion resistance, while the introduction of Co can precisely modulate the sub-nanosheets morphology to expose more accessible active sites. Moreover, XPS, UPS, and DFT calculations reveal that the synergistic effect of different dopants can achieve the most optimal electronic structure around Cu and Ni, causing a down-shifted d-band center, which reduces the hydrogen desorption free energy of the rate-determining step (H 2 O + e − + H* → H 2 + OH − ) and consequently enhances the intrinsic activity. This work provides a new cognition toward the development of excellent activity and stability HER electrocatalysts and spurs future study for other NiCu-based alloy materials.
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
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Uddin Sk Raihan,Jingqi Zhang,Jingbo Chao,Qing Hu,Frederic Coulon,Xiao Jin Yang
Chlorinated phenols are highly toxic to human and ecosystem and their biological degradation is difficult. In this work, a novel MgAlNi alloy catalyst was developed for rapid chemical degradation of p-chlorophenol (4-CP) in water under mild conditions via in situ hydrodechlorination ( i HDC) without external hydrogen gas supply. A complete conversion of 0.195 mM 4-CP to phenol was achieved within 15 min with a reaction rate constant of 7.65 h −1 , 19.4 times higher than that of the traditional Raney Nickel (AlNi alloy) catalyst. The excellent performance of MgAlNi alloy catalyst is attributed to enhanced H 2 generation by Mg etching, surface self-reconstruction by growth of in situ layered double hydroxide ( i LDH) nanosheets of 0.08–1 nm, exposed active sites of AlNi intermetallic compounds Al 3 Ni 2 and Al 3 Ni. The findings of this study provide new insights into broader applications of nanoconfinement catalysis to environmental remediation and open a new domain of in situ nanoconfinement catalysis ( i NCC).
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2024
·Vol. 12
·期 17
·4184-4196
·
IF 6.1
Linsen Li,Yue Yu,Xiaoqing Sun,Xingyou Wang,Xiayan Yang,Qifeng Yu,Ke Kang,Yao Wu,Qiangying Yi
Stent implantation is one of the most effective methods for the treatment of atherosclerosis. Nitinol stent is a type of stent with good biocompatibility and relatively mature development; however, it cannot effectively achieve long-term anticoagulation and early endothelialization. In this study, nitinol surfaces with the programmed assembly of heparin, exosomes from endothelial cells, and endothelial affinity peptide (REDV) were fabricated through layer-by-layer assembly technology and click-chemistry, and then exosomes/REDV-modified nitinol interface (ACC-Exo-REDV) was prepared. ACC-Exo-REDV could promote the rapid proliferation and adhesion of endothelial cells and achieve anticoagulant function in the blood. Besides, ACC-Exo-REDV had excellent anti-inflammatory properties and played a positive role in the transformation of macrophage from the pro-inflammatory to anti-inflammatory phenotype. Ex vivo and in vivo experiments demonstrated the effectiveness of ACC-Exo-REDV in preventing thrombosis and hyperplasia formation. Hence, the programmed assembly of exosome interface could contribute to endothelialization and have potential application on the cardiovascular surface modification to prevent stent thrombosis and restenosis.
研究领域:
生物医学工程
·
心血管疾病
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Yu Fu,Lijie Qi,Wanli Kang,Saule B. Aidarova,Hongbin Yang,Shujun Liu
The construction of electrocatalytic cathodic nitrate reduction and anodic polyacrylamide (HPAM) oxidation reactions is a promising new electrocatalytic reaction system, which promises simultaneous ammonia synthesis and HPAM degradation. Here, we synthesised an N-doped C nanotube-encapsulated CoNi nano-alloy and used it for electrocatalytic NO 3 − reduction and HPAM oxidation reactions. Therein, CoNi-0.5 could achieve the maximum ammonia yield and Faraday efficiency of 5516.73 ± 66.07 μg h −1 mg cat −1 and 94.71 ± 1.21 %, respectively. Meanwhile, the maximum degradation rate of HPAM was 73.02 ± 1.16 % at 2 h. By In-situ ATR-SEIRAS, in-situ DEMS demonstrated that *NOH is an important reaction intermediate in the ammonia synthesis process, and the bimetallic CoNi alloy can effectively reduce the reaction energy barrier for NO 3 − reduction. This work presents a new strategy for constructing a coupled system for electrocatalytic NO 3 − reduction.
研究领域:
材料科学
·
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2025
·Vol. 15
·期 6
·635
·
IF 2.8
Fan Cao,Shumei Yao,Xiaowen Meng,Jianpeng Wang,Sujie Chang,Yi Wang,Aiqing Song,Dayong Li,Lei Shi
The novel pyridine oxime-based complexing agents 2-pyridinecarboxaldehyde oxime, 2-acetylpyridine ketoxime and 2-pyridine amidoxime were synthesized for alkaline Zn-Ni alloy electrodeposition, outperforming conventional citrate/TEPA systems in corrosion resistance and microstructural control. The N,O-bidentate chelation mechanism governs metal ion reduction kinetics via diffusion-limited pathways, enabling γ-phase Ni5Zn21intermetallic formation and nanocrystalline refinement. Electrochemical and microstructural analyses demonstrate suppressed random nucleation and hydrogen evolution side reactions, leading to enhanced charge transfer resistance and reduced corrosion current density. Notably, 2-pyridine amidoxime achieves ultrasmooth surfaces through defect-free nanocluster growth, while 2-pyridinecarboxaldehyde oxime maximizes γ-phase crystallinity. The synergy between grain boundary density and surface integrity establishes a dual protection mechanism combining barrier layer formation and active dissolution suppression. This work advances microstructure engineering via coordination chemistry, offering a breakthrough over traditional zincate electroplating for high-performance anti-corrosion coatings.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Xufeng Tang,Sibin Zhu,Zilan Jiang,Haibo Tang,Xiaoming Zhu,Lun Yu,Shuodan Li,Letian Li,Yadong Wang,Haolin Tang,Xiaoling Liu
The sluggish kinetic processes of the anode and the poisoning characteristics of *NH 3 intermediates in the direct ammonia fuel cell paradigm necessitate bespoke electrocatalyst engineering. Given the fundamental traits of surface reactions in electrochemical ammonia oxidation reaction (AOR) and the high efficiency of alloy catalysts, PtNi nanowires, nanorods, and nanoparticles with a Pt shell structure were developed as surface-engineered model catalysts to clarify how the microarchitecture of nanocatalysts affects the adsorption of NH 3 and intermediates, along with AOR activity. PtNi nanowires exhibit significantly improved activity compared to PtNi nanorods, nanoparticles, and commercial Pt/C, due to the higher proportion of the Pt(100) facet and their unique thin Pt shell layer structure. The peak current density of PtNi nanowires reaches 0.63 mA cm −2 , 2.52 times higher than that of commercial Pt/C. Furthermore, the incorporation of Ni into Pt can effectively bolster the electrochemical durability via electronic effects on the Pt surfaces. Upon conversion from ambient temperature to 60 °C, PtNi nanowires still demonstrate superior AOR activity and durability compared to commercial Pt/C. Density functional theory calculations have elucidated that the thin Pt shell structure can effectively augment the adsorption of NH 3 and diminish the activation energy of the AOR process. This seminal work provides a conceptual framework for the design of efficacious AOR catalysts.
研究领域:
化学
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2019
·
IF 12.221
Mingxing Gong,Zhiping Deng,Dongdong Xiao,Lili Han,Tonghui Zhao,Yun Lu,Tao Shen,Xupo Liu,Ruoqian Lin,Ting Huang,Guangwen Zhou,Huolin Xin,Deli Wang
Developing highly active as well as durable oxygen reduction reaction (ORR) electrocatalysts are still imperative for clean and efficient energy conversion device, such as fuel cells and metal-air battery. For this purpose and maximize the utilization of noble Pt, we present here a facile, yet scalable strategy for the high-precise synthesis of 1-nm-thick Pt3Ni bimetallic alloy nanowires (Pt3Ni BANWs). The seed-mediated growth mechanism of Pt3Ni BANWs was identified subsequently. As expected, the Pt3Ni BANWs delivered enhanced mass activity (0.546 A mgPt–1, exceeding the 2020 target of DOE) in comparison to Pt nanowires assembly (Pt NWA, 0.098 A mgPt–1) and Pt/C (Pt, 0.135 A mgPt–1), because of the rational integration of multiple compositional and structural advantages. Moreover, the Pt3Ni BANWs displayed enhanced durability (37% MA retention) than Pt NWA and Pt after 50 000 potential cycles. All these results indicate that the ultrathin Pt3Ni BANWs are potential candidates for catalyzing ORR with acceptable activity and durability. The present work could not only provide a facile strategy but also a general guidance for the design of superb performance Pt-based nanowire catalysts for ORR.
研究领域:
材料科学
·
电化学
·
能源转换技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 60
·37823-37829
·
IF 3.108
Jinglei Liu,Yiqun Zheng,Shifeng Hou
We report a facile synthesis of copper/nickel (Cu/Ni) alloy nanospheres in high purity and with tunable, well-controlled sizes and elemental ratios. The success of this synthesis relies on the use of one-pot, direct thermal reduction of a Cu and Ni precursor mixture in the presence of trioctylphosphine (TOP) and oleylamine (OAm) at an elevated temperature to form Cu/Ni alloy nanoparticles with a spherical shape and uniform size. Their sizes could be readily tuned in the range of 6.9–27.3 nm by simply varying the volume of TOP added to the reaction solution. The elemental ratio of Cu to Ni in resultant products was found to remain the same as that in the precursor, which offers a simple way to manipulate the composition of Cu/Ni alloy nanospheres. We also tested the catalytic performance of as-prepared Cu/Ni alloy nanospheres and evaluate the effect of size and elemental ratio using the reduction of 4-nitrophenol as the model reaction. The current strategy enables the size and composition controlled synthesis of Cu/Ni alloy nanomaterials and could find important use in the fabrication of other types of bimetallic alloy nanomaterials with desired sizes and compositions for catalytic purposes.
研究领域:
材料科学
·
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）