JOURNAL OF MOLECULAR STRUCTURE
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2024
·
IF 4
Yuxuan Ke,Shuzhen Chen,Suisui Su,Jiao Zhang,Shenghua Hu,Cuiqing Zhang,Changyuan Hu,Shizheng Zheng
Bi 2 O 3 has been recognized as a promising anode of aqueous secondary battery because of the high capacity, but the application is greatly hindered by the poor conductivity and limited actual capacity. Herein, for the first time, one dimensional (1D) α-Bi 2 O 3 nanobelt is fabricated via alkali etching strategy using rod-shaped Bi-MOF (CAU-17) as the self-sacrificial template. Specifically, high-crystalline and oxygen-deficient α-Bi 2 O 3 nanobelt with length and width of 6 μm and 300 nm are identified. The electrochemical results demonstrate the high specific capacity (247 mAh g −1 @1 A g −1 ) and acceptable stability of α-Bi 2 O 3 nanobelt. Such superior capacity is derived from the exposed electrochemical active sites, fast charge transfer and efficient ion diffusion in 1D high-crystalline and oxygen-vacancies enriched structure. The assembled Ni-Bi battery displays high capacity (78.3 mAh g −1 ) and high energy density of 100.2 Wh kg −1 (at power density of 2829.8 W kg −1 ). Our work provides rational guidance for architecting 1D high-capacitive electrodes for aqueous rechargeable alkaline battery.
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高影响因子
Small
·
2025
·
IF 12.1
Shaojian Jiang,Yuhang Liu,Ruidong Yang,Lijun Zhang,Wenke Liu,Kai Deng,Hongjie Yu,Hongjing Wang,Liang Wang
Since formaldehyde oxidation reaction (FOR) can release H 2 , it is attractive to construct a bipolar hydrogen production system consisting of FOR and hydrogen evolution reaction (HER). Although copper-based catalysts have attracted much attention due to their low cost and high FOR activity, the performance enhancement mechanism lacks in-depth investigation. Here, an amorphous-crystalline catalyst of amorphous nickel hydroxide-coated copper dendrites on copper foam (Cu@Ni(OH) 2 /CF) is prepared. The modification of Ni(OH) 2 resulted in hydrophilic and aerophobic states on the Cu@Ni(OH) 2 /CF surface, facilitating the transport of liquid-phase species on the electrode surface and accelerating the release of H 2 . The Open circuit potential (OCP) and density functional theory (DFT) calculations indicate that this core–shell structure facilitates the adsorption of HCHO and OH − . In addition, the catalytic mechanism and reaction pathway of FOR are investigated through in situ FTIR and DFT calculations, and the results showed that the modification of Ni(OH) 2 lowered the energy barrier for C─H bond breaking and H─H bond formation. In the HER//FOR system, Pt/C//Cu@Ni(OH) 2 /CF can provide a current density of 0.5 A cm −2 at 0.36 V and achieve efficient and stable H 2 production. This work offers new ideas for designing electrocatalysts for bipolar hydrogen production system assisted with formaldehyde oxidation.
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PubMed
高影响因子
TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Xingtao Cheng,Kaijun Wei,Hongjie Li,Na Teng,Shijun Xu,Quangang Chen,Xianmin Gong,Yi He,Siming Yan
At the present time, the subject of seawater scouring and corrosion phenomena is attracting considerable attention. Accordingly, the present study involved the synthesis of CuPP materials and the preparation of Ni-Cu/CuPP coatings for deployment in marine environments characterised by elevated stress and corrosion. The results show that CuPP can effectively enhance the wear resistance and long-term corrosion resistance of Ni-Cu coatings, which is attributed to ‘fine grain strengthening’ and ‘diffusion strengthening’. Furthermore, the formation of a friction transfer film and the transformation of the wear mechanism are the primary factors contributing to the exceptional wear resistance of the Ni-Cu/CuPP composite coatings.
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高影响因子
SmartMat
·
2024
·
IF 15.3
Zongkai Yan,Qi Cheng,Mengxuan Sun,Baoshan Wu,Yanlin Zhu,Zuwen Tong,Ming Li,Chunyang Jia,Panfeng Zhao
For aqueous zinc ion batteries (AZIBs), Zn dendritic growth and hydrogen evolution reaction (HER) usually result in the severe degradation of bare Zn anodes. Although the alloy-modified anodes can improve the reversibility of the Zn plating/stripping process, the regulation of alloy components is too complex to meet the requirements for large-scale fabrication. Herein, a Ni-Ag bimetallic coating on Zn foils (Ni-Ag@Zn) is prepared by magnetron co-sputtering. Owing to this bimetallic coating with the ultrathin thickness of 200 nm, the cycling life of Ni-Ag@Zn-based symmetric cells attains more than 5000 h at current density of 1 mA/cm 2 and areal capacity of 1 mA h/cm 2 , exceeding most of the reported binary/ternary-alloy-based symmetric cells. To the suppression of dendrite growth and HER, the regulation mechanism of the bimetallic coating on Zn deposition is assigned to the synergistic effect, the suppressed HER by the strong adsorption of Ag with H ions and the flatted Zn deposition via the strong adsorption of Ni/Ag with Zn ions. To our knowledge, both the bimetallic and ultrathin features have not been reported to optimize the anodes for AZIBs. The present bimetallic coating strategy renders the diversification of anode modification for the commercialization of high-performance AZIBs.
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JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2024
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IF 5.8
Yingna Li,Muhammad Sajjad Ahmad,Mudassir Hussain Tahir,Maryam Bashir,Arif Muhammad Khan,Rana Muhammad Irfan,Imran Riaz Malik,Boxiong Shen
This study investigates the selective production of aromatics through the co-pyrolysis of cabbage waste and plastics followed by catalytic reforming with Ni-modified ZSM-5. Co-pyrolysis significantly improves the inflection point (a parameter for determining thermal stability) to 251.3 °C from 232.7 °C. This process also enhances the relative yield of olefins and phenols , which are precursors for aromatic production to 25.46 and 17.23 respectively, up from 13.87 to 12.05. Furthermore, catalytic pyrolysis elevates the relative yield of aromatics to 53.4, as confirmed by Thermogravimetric Analysis (TGA) and Thermogravimetric-Fourier Transform Infrared Spectroscopy (TG-FTIR) analyses. GC-MS confirms the enhanced formation of valuable chemical precursors via co-pyrolysis such as phenols and olefines to 18.67 % and 22.13 % leading to a 63.81 % selective yield of aromatics in the final oil with 10Ni/ZSM-5. Ni modification of ZSM-5 is influential in decreasing PAH formation (7.26 % from 20.37 %), indicating that this two-step process is an effective method for transforming waste into high-quality bio-oil with enriched aromatic content.
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Nanomaterials
·
2024
·Vol. 14
·期 17
·1445
·
IF 4.4
Jingchao Zhang,Yingping Bu,Zhuoyan Li,Ting Yang,Naihui Zhao,Guanghui Wu,Fujing Zhao,Renchun Zhang,Daojun Zhang
Oxygen evolution reaction (OER) is a critical half-reaction in electrochemical overall water splitting and metal–air battery fields; however, the exploitation of the high activity of non-noble metal electrocatalysts to promote the intrinsic slow kinetics of OER is a vital and urgent research topic. Herein, Fe-doped Ni3S2arrays were derived from MOF precursors and directly grown on nickel foam via the traditional solvothermal way. The arrays integrated into nickel foam can be used as self-supported electrodes directly without any adhesive. Due to the synergistic effect of Fe and Ni elements in the Ni3S2structure, the optimized Fe2.3%-Ni3S2/NF electrode delivers excellent OER activity in an alkaline medium. The optimized electrode only requires a small overpotential of 233 mV to reach the current density of 10 mA cm−2, and the catalytic activity of the electrode can surpass several related electrodes reported in the literature. In addition, the long-term stability of the Fe2.3%-Ni3S2/NF electrode showed no significant attenuation after 12 h of testing at a current density of 50 mA cm−2. The introduction of Fe ions could modulate the electrical conductivity and morphology of the Ni3S2structure and thus provide a high electrochemically active area, fast reaction sites, and charge transfer rate for OER activity.
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高影响因子
FUEL
·
2024
·
IF 6.7
Yangshuo Liu,Keke Huang,Yao Meng,Chubo Wang,Liang Qiao,Wei Cai,Yaotian Yan,Xiaohang Zheng
Searching for highly efficient electrocatalysts for the hydrogen evolution reaction (HER) is principal to the development electrolytic water production industry. Experimental screening of highly active electrocatalysts is time-consuming and complicated. In this work, an Artificial Neural Network model is proposed to accelerate the screening for Ag(M) catalysts (M = Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Mo, Ru, Rh, Pd, In, Sn, Sb, W, Re, Os, Ir, Pt, Au and Hg), which is used to predict the Gibbs free energy of hydrogen. The Ag(Ni) catalyst is identified as a potential electrocatalyst with the nearly ideal (ΔG H ), which affords the relatively low overpotentials of 159 mV for HER at 10 mA cm −2 . According to the prediction of our ANN model, we synthesized Ag(Mn), Ag(Co), and Ag(Cu) catalysts. The Ag(Ni) catalyst exhibits the best HER activity, which is 120 mV smaller than Ag(Mn), Ag(Co), and Ag(Cu) catalysts. The incorporation of Ni effectively optimizes the electronic environment of the materials, which drives the upshift of d-band center and drastically reduces the Gibbs free energy of hydrogen (ΔG H ). Our method is significantly more efficient, running 1184 times faster than the traditional DFT method. Our work paves an efficient way to design and develop potential HER catalysts.
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MICROCHEMICAL JOURNAL
·
2025
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IF 5.1
Atiq Ur Rehman,Muhammad Anwar,Adil Khan,Kashif Ali Kalhoro,Chi Zhang,Yanke Zhang,Mohammadreza Shokouhimehr,Zhengchun Liu
Uric acid (UA) and dopamine (DA) are clinical biomolecules associated with various physiological and pathological processes. This study investigates the electrochemical sensing performance of UA and DA based on a dual-modified electrode with holey molybdenum disulfide (h-MoS 2 ) and electrodeposited nickel nanoparticles (NiNPs) GCE/ENi-hMoS 2 . To fabricate an electrochemical sensor, h-MoS 2 nanosheets were synthesized using a simple ultrasonic process from bulk MoS 2 for UA and DA detection. The electrochemical sensing performance of h-MoS 2 and NiNPs modified electrodes were characterized using techniques, such as cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy. Due to the synergetic contribution of h-MoS 2 and NiNPs, the sensor achieved remarkable sensitivity and also exhibited strong anti-inference ability. The sensor exhibited linear ranges between 100–9000 μM and 50–3600 μM, with low detection limits of 7.3 μM and 2.1 μM for UA and DA simultaneously. Additionally, the developed GCE/ENi-hMoS 2 -based electrochemical sensor exhibited high selectivity in the existence of interfering substances, including glucose and ascorbic acid with good stability. This study offers a reference for the fabrication of stable electrochemical sensors consolidated by two-dimensional materials for small-molecule detection.
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Surfaces and Interfaces
·
2024
·
IF 5.7
Jun Zhang,Yimeng Cao,Fang Chen,Mengdie Cai,Jia-qi Bai,Jiawei Xue,Jingshuai Chen,Chang-Jie Mao,Song Sun
Cocatalysts play a pivotal role in enhancing the efficiency of photocatalytic water splitting. In this study, we introduced a novel and straightforward pre-impregnation strategy to anchor a CuNi dual cocatalyst onto the surface of Al-doped SrTiO 3 (Al-STO), coupled with photodeposition. This approach led to a remarkable 11.07-fold (77.5 µmol/h) increase in hydrogen evolution performance compared to the conventional photodeposition method for decorating with CuNi dual cocatalysts. Not only that, after the 18 h cycle experiment, the catalyst still maintains high activity and high stability similar to that of precious metals, which overcomes the defects of poor stability and short life of non-precious metals. This strategy capitalizes on the pre-adsorption of cocatalyst precursor ions on the Al-STO support via impregnation, enhancing both the adsorption energy and capacity between the precursor ions and the active sites. Detailed characterizations have revealed a strong electronic interaction within the Cu-Ni structure and improved interfacial coupling between CuNi and Al-STO. This not only significantly promotes charge separation and transfer but also provides a plethora of active sites for the photocatalytic generation of H 2 . Moreover, extensive theoretical calculations have provided deep insights into the reaction mechanism of the CuNi system and elucidated the reasons behind the varying degrees of activity enhancement across different cocatalyst architectural systems.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Wenjing Yang,Xujie Zhang,Chenhang Ding,Wurikaixi Aiyiti,Cijun Shuai
Bacterial infections especially bacterial biofilm infections have always been a major obstacle to the reconstruction of deep skin defects. Herein, a photothermal activated multifunctional nanocatalyst (Ni@ZIF-C) is synthesized by doping Ni into zeolitic imidazolate framework-67 (ZIF-67) and carbonizing, following by introducing into polycaprolactone (PCL) to prepare porous scaffolds by selective laser sintering. Especially, the Ni@ZIF-C nanocatalyst endows scaffold favorable chemo/photodynamic/photothermal triple-mode antibacterial activity under near-infrared light irradiation. On the one hand, the highly conductive Ni@ZIF-C improves the separation efficiency of photogenerated electron-hole pairs to trigger reactive oxygen species (ROS) generation, achieving photodynamic sterilization. On the other hand, the superior photothermal conversion efficiency of Ni@ZIF-C in scaffold not only directly destruct bacterial biofilms by hyperthermia but also enhance its own peroxidase-like activity to induce more ROS production, and the latter is bactericidal by chemical mode. Importantly, the destruction of the biofilms enables the pre-generated ROS to kill deep bacteria, achieving a triple-mode combined or even synergistic antibacterial efficacy. Results demonstrated that the PCL/Ni@ZIF-C scaffold with triple bactericidal modalities presents stronger bactericidal ability than PCL/ZIF-67 and PCL scaffolds. Encouragingly, it remarkably destroyed S. aureus and E. coli biofilms and inhibited biofilm formation, effectively triggered massive ROS generation and ultimately eradicated the bacteria deep within the biofilms. Taken together, the scaffold exhibited tremendous potential in utilizing photothermal activated multimodal combined antibiofilm and antibacterial therapy.
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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
·
2025
·
IF 16.9
Wuyi Zhang,Asad Mehmood,Ghulam Ali,Hui Liu,Liyuan Chai,Jun Wu,Min Liu
Unsaturated Ni single atom catalysts (SACs), Ni-Nx (x=1,2,3), have been investigated to break the conventional Ni-N4 structural limitation and provide more unoccupied 3d orbitals for CO2RR intermediates adsorption, but their intrinsically low structural stability has seriously hindered their applications. Here, we developed a strategy by integrating Ni nanoclusters to stabilize unsaturated Ni-N3 atomic sites for efficient CO2 electroreduction to CO at industrial-level current. DFT calculations revealed that the incorporation of Ni nanocluster effectively stabilizes the unsaturated Ni-N3 atomic sites and modulates their electronic structure to enhance the adsorption of the key intermediate *COOH during CO2RR. Guided by these insights, we prepared an optimal composite catalyst, Ni6@Ni-N3, which features a Ni6N6 nanocluster surrounded by six Ni-N3 single atoms sites, through low-temperature pyrolysis. As a result, Ni6@Ni-N3 demonstrated a remarkably high CO Faradaic efficiency (FECO) of 99.7% and a turnover frequency (TOF) of 83984.2 h-1 at 500 mA cm-2 under -1.15 VRHE, much better than the conventional Ni-N4 . XAS analyses of Ni6@Ni-N3 before and after long-term CO2RR testing confirmed the excellent stability of its coordinative environment. This work highlights a generalizable approach for stabilizing unsaturated single-atom catalysts, paving the way for their application in high-performance CO2RR.
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高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2024
·
IF 5.8
Wenpeng Hong,Yuhang Li,Haifeng Jiang,Yu Zhang,Wei Jia,Meng Song
Catalytic steam gasification is a promising route for converting plastic waste into valuable gaseous products. This work explores the heterogeneous catalytic gasification behavior of polystyrene (PS) in a two-stage fixed bed system, as well as the promotion mechanism for the generation of gaseous hydrocarbons. The obtained results indicate that adding MnCo 2 O 4 catalyst can effectively promote the formation of gaseous hydrocarbons. Further, the incorporation of Cu strengthens the above reaction process, resulting in a yield of 85.08 mmol/g for the C 1 -C 3 gaseous hydrocarbons. However, the doping of Ni has a negative effect on the generation of gaseous hydrocarbons. Moreover, an increase in the flow rate of steam within the system results in an initial rise followed by a decline in the yield of gaseous hydrocarbons. The optimal steam inflow is determined at 0.14 mL/min. The cycling test results of the catalyst show that the yield of the gaseous components of C 1 -C 3 can still be maintained at about 80 % of the initial state after five cycles. Finally, the synergistic pathway of steam and catalyst in PS gasification is elucidated. These works provide important and valuable guidance for the preparation of high-value gas-phase hydrocarbon products from waste plastics.
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