ChemNanoMat
·
2022
·Vol. 8
·期 6
·e202200085
·
IF 3.82
Yang Gu,Chuqian Meng,Shuyue Dong,Hexin Zhu,Qian Liu,Yonglan Luo,Qingquan Kong,Tingshuai Li
High-performance earth-abundant electrocatalysts for oxygen evolution reaction (OER) are highly desirable. In this report, we successfully synthesized amorphous Fe−P shell electrodeposited on Co(OH)F nanowire arrays supported on titanium mesh (Fe−P@Co(OH)F/TM) as an efficient catalyst for OER. Such catalyst exhibits excellent OER activity with a low overpotential of 267 mV to reach the geometrical current density of 10 mA cm −2 in 1.0 M KOH. In addition, it has good electrochemical durability to maintain its activity for at least 20 h.
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高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Cong Gao,Wei Sun,Weitong Zhang,Qiao Zhang,Shanyi Guang,Qianjin Chen
Open-framework crystal structured vanadates have been extensively investigated as cathode materials for aqueous zinc-ion batteries (ZIBs). However, the inherent challenges of poor electronic conductivity and structural instability compromise the rate capability and overall cycle life. Herein, we first successfully synthesized octahedral MIL-101(V) and prepared the Zn 3 (OH) 2 V 2 O 7 ·2H 2 O@C (ZVOH@C) composite by in-situ electrochemical conversion of MIL-101(V)-derived crystalline V 2 O 3 and carbon composite (V 2 O 3 @C). The ZVOH@C composite of open-framework crystal structured Zn 3 (OH) 2 V 2 O 7 ·2H 2 O and conductive carbon skeleton not only possesses more active sites, more stable crystal structure and higher electrical conductivity , but also provides faster Zn 2+ diffusion kinetics. As expected, the ZVOH@C composite electrode exhibits excellent capacity of 506.3 mAh/g at a current density of 1.0 A/g, exceptional rate performance (375.7 mAh/g at 20.0 A/g), and impressive long-term cycling stability, maintaining 314.5 mAh/g over 5000 cycles at 20.0 A/g. This study demonstrates a promising method for designing new cathode materials through in-situ electrochemical synthesis for ZIBs .
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Xiaomin Peng,Jinming Zhang,Tianlun Cen,Zhifeng Ye,Yiyi Liu,Dingsheng Yuan
2-dimensional Co(OH) 2 -NiCo 2 O 4 hybrid nanosheets coupled with N-doping reduced graphene oxide (N-RGO) have been prepared by a facile two-step hydrothermal method for exploring the cost-effective and durable bifunctional oxygen electrocatalysts of Zn-air batteries. Co(OH) 2 -NiCo 2 O 4 /N-RGO exhibits the excellent catalytic activity for ORR with a positive half-wave potential of 0.80 V vs. RHE in 0.1 M KOH. And the assembled rechargeable Zn-air battery achieves a high open-circuit voltage of 1.485 V, a large peak power density of 99 mW cm −2 , and a remarkable cycle life of over 180 h. This work offers an inspiration to obtain efficient electrocatalysts for sustainable energy devices.
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高影响因子
Energy Technology
·
2019
·Vol. 8
·期 3
·1901105
·
IF 3.163
Honglin Yan,Qiang Ru,Ping Gao,Shikun Cheng,Fuming Chen,Francis Chi-Chung Ling,Li Wei
Lamellar V 5 O 12 ·6H 2 O nanobelts coupled with inert Zn(OH) 2 ·0.5H 2 O are in situ fabricated via a facile hydrothermal strategy. Herein, the inert Zn(OH) 2 ·0.5H 2 O phase acts as a buffer matrix to strengthen the structural stability of V 5 O 12 ·6H 2 O host material, relieving the severe volume variation. Therefore, benefiting from the large interplanar spacing of active V 5 O 12 ·6H 2 O and volume buffering effect of inert Zn(OH) 2 ·0.5H 2 O, V 5 O 12 ·6H 2 O/Zn(OH) 2 ·0.5H 2 O hybrid (denoted as Z-V 5 O 12 ·6H 2 O) sustainably endures the repetitive Zn 2+ /Na + insertion/extraction and boosts the electrochemical properties. As cathodes for aqueous zinc-ion batteries, the Z-V 5 O 12 ·6H 2 O hybrid shows a high discharge capacity of 328 mAh g −1 at 50 mA g −1 and keeps 146 mAh g −1 at 1 A g −1 after 1000 cycles. For nonaqueous sodium-ion batteries, the hybrid also furnishes a high initial discharge capacity of 241 mAh g −1 at a current density of 50 mA g −1 and maintains 97 mAh g −1 at 100 mA g −1 after 100 cycles.
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高影响因子
Water Supply
·
2022
·Vol. 22
·期 8
·6603-6614
·
IF 1.768
Zhang Fengrong,Zhang Binghan,Han Dandan,Fang Shaokang,Wu Lishun,Hou Wanguo
Using Al(OH) 3 and Mg(OH) 2 as raw materials, MgAl layered double hydroxides (LDHs) modified from birch leaves were prepared by the ball-milling–hydrothermal method, denoted as LDHs/BL, and used for the treatment of wastewater containing Cu(II). The morphology, crystal shape, and specific surface area of the samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and BET-specific surface area analyzer. The results showed that the prepared LDHs/BL composites had good crystal shape, large specific surface area, and suitable pore structure. Langmuir and Freundlich adsorption isotherm models were used to analyze the adsorption. The results showed that the adsorption conforms to the Freundlich adsorption isotherm model. Under the same adsorption conditions, the adsorption capacity of the LDHs/BL complex was higher than that of LDH, the removal efficiency of the former was 92%, and that of the latter was 68%. The adsorption mechanism includes metal precipitation and isomorphic replacement. More importantly, this study provides a green method to prepare LDHs. LDHs/BL composites are expected to be used as a new kind of environmental adsorbent for wastewater treatment. This work provides a new idea for the utilization of agricultural and forestry wastes. Nanocomposites of LDHs/BL were fabricated. The LDHs/BL nanocomposites exhibit enhanced sorption capacities for Cu(II). The nanocomposites are potential sorbents for wastewater treatment. The synthesis of LDHs/BL nanocomposites provides a win–win strategy.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2016
·
IF 2.435
Hai Wu,Youjin Zhang,Maozhong Zhou,Chengpeng Yao,Xianjin Ge
Large single crystals of gadolinium hydroxide [Gd(OH) 3 ] in the length of several millimeters were successfully prepared by using solid KOH assisted hydrothermal method. Gd(OH) 3 samples were characterized by X-ray diffraction (XRD), 4-circle single-crystal diffraction, Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). FESEM image shows hexagonal prism morphology for the Gd(OH) 3 large crystals. The possible growth mechanism of Gd(OH) 3 large single crystals was proposed. The photoluminescence and magnetic properties of Gd(OH) 3 species were investigated.
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yaxin Wang,Xuelong Liao,Wei Wang,Shan Chen,Jialei Chen,Huan Wang
The loose and randomly oriented byproduct (i.e., Zn4(OH)6SO4·xH2O, ZHS) in situ formed on the zinc (Zn) surface is recognized to be the primary cause for dendritic Zn growth and side reactions. Switching the detrimental passivation film into a dense and kinetically favorable solid electrolyte interphase (SEI) is a straightforward strategy to tackle these issues faced by Zn metal anodes but remains largely unexplored. Herein, a new polymer film directly grown on Zn metal through room-temperature plasma-enhanced chemical vapor deposition is proposed to induce the lateral growth of ZHS nanosheets and decrease the Zn2+ desolvation barrier, thereby forming a beneficial composite SEI for suppressing Zn dendrite growth and surface corrosion. As a result of the joint effect, we realize an impressively stable cycling behavior in symmetric cell over 3400 h at 2 mA cm–2. Moreover, full cells also demonstrate prolonged lifespans. This work opens a new avenue for stabilizing Zn metal batteries by turning detrimental ZHS into a favorable interlayer.
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高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 50
·505406
·
IF 3.874
Chenyuan Zhao,Yuxiang Zhou,Tianyu Shi,Desong Guo,Haihong Yin,Changqing Song,Lin Qin,Zhiliang Wang,Haibao Shao,Ke Yu
The low sulfur utilization, cycling instability, and sluggish kinetics are the critical obstructions to practical applications of lithium–sulfur batteries (LSBs). Constructing sulfur hosts with high conductivity, suppressed shuttle effect, and rapid kinetics is essential for their practical application in LSBs. Here, we synthetically utilized the merits of ZnSe quantum dots (QDs) and layered Ni(OH)2 to boost the performance of LSBs. A novel core–shell ZnSe-CNTs/S@Ni(OH)2 was constructed using the ZnSe-CNTs network as framework to load sulfur and following with Ni(OH)2 encapsulation. The CNT network decorated with ZnSe QDs not only serves as a conductive framework providing fast electron/ion transfer channels, but also limits polysulfide diffusion physically and chemically. Layered Ni(OH)2, the wrinkled encapsulation, not only permits fast electron/ion transfer, but also buffers the expansion, confines active materials, and limits the polysulfide dissolution chemically. When used as a cathode, ZnSe-CNTs/S@Ni(OH)2 presents enhanced electrochemistry performance compared with ZnSe-CNTs/S and CNTs/S. The average specific capacity decreases from 1021.9 mAh g−1 at 0.2 C to 665.0 mAh g−1 at 2 C, showing rate capacity much higher than ZnSe-CNTs/S and CNTs/S. After 150 cycles, the capacity at 0.5 C slowly reduces from 926.7 to 789.0 mAh g−1, showing high retention of 85.1%. Therefore, our investigation provides a new strategy to construct a promising sulfur cathode for LSBs.
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高影响因子
Nano Energy
·
2017
·
IF 12.343
Shao-Qing Liu,Hao-Ran Wen,Ying-Guo,Yan-Wu Zhu,Xian-Zhu Fu,Rong Sun,Ching-Ping Wong
Highly active, durable and cost-effective eletrocatalysts are crucial for hydrogen evolution reaction (HER). Herein, we report novel hollow hybrid spheres comprising of amorphous Ni(OH) 2 and crystalline CuS mesoporous nano-shelled heterostructures as efficient HER electrocatalysts . Spherical Cu 2 O particles are used as templates for fabrication of Ni(OH) 2 @CuS hollow spheres with nano-shelled heterostructures . The as-obtained catalysts exhibit much higher performance than the single Ni(OH) 2 , CuS, their physical mixture and crystalline Ni(OH) 2 @CuS toward water electrochemical reduction in alkaline medium . The superior HER electrocatalytic performance might be attributed to the unique hollow mesoporous nanoshelled architecture and the heterostructured synergetic effects between amorphous Ni(OH) 2 and crystalline CuS, in which the short-range order of the inner amorphous Ni(OH) 2 mesoporous shell creates abundant active sites on the surface, and the conductive CuS out layer promotes electron transportation. This work might open a door for designing and synthesizing of hollow nanomaterials with mesoporous nano-shelled heterostructures consist of amorphous and crystalline phase for applications in electrochemical catalysis and energy conversion.
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高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Weiwei Mao,Haiping He,Pengcheng Sun,Zhizhen Ye,Jingyun Huang
A facile and scalable in situ microelectrolysis nanofabrication technique is developed for preparing cross-linked Ni(OH)2 nanosheets on a novel three-dimensional porous nickel template (Ni(OH)2@3DPN). For the constructed template, the porogen of NaCl particles not only induces a self-limiting surficial hot corrosion to claim the “start engine stop” mechanism but also serves as the primary battery electrolyte to greatly accelerate the growth of Ni(OH)2. As far as we know, the microelectrolysis nanofabrication is superior to the other reported Ni(OH)2 synthesis methods due to the mild condition (60 °C, 6 h, NaCl solution, ambient environment) and without any post-treatment. The integrated Ni(OH)2@3DPN electrode with a highly suitable microstructure and a porous architecture implies a potential application in electrochemistry. As a proof-of-concept demonstration, the electrode was employed for nonenzymatic glucose sensing, which exhibits an outstanding sensitivity of 2761.6 μA mM–1 cm–2 ranging from 0.46 to 2100 μM, a fast response, and a low detection limit. The microelectrolysis nanofabrication is a one-step, binder-free, entirely green, and therefore it has a distinct advantage to improve clean production and reduce energy consumption.
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高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 27
·275401
·
IF 3.5
Zhongyao Duan,Mei Zhang,Qiqi Mao,Kai Deng,Hongjie Yu,Ziqiang Wang,You Xu,Liang Wang,Hongjing Wang
The design of electrocatalysts with excellent activity and stability for overall water splitting is highly desirable, and remains a challenge. Constructing heterojunctions onto the same substrate is beneficial for the integration of a water-splitting reaction. Herein, self-supported IrNi/Ni(OH)2@PPy and IrNi/Ni(OH)2@FeOOH are fabricated by coupling polypyrrole (PPy) and iron oxyhydroxide (FeOOH) on IrNi/Ni(OH)2 nanosheets array, respectively. Benefiting from the nanosheet structure, composition, and heterogeneous interface, the as-constructed IrNi/Ni(OH)2@PPy and IrNi/Ni(OH)2@FeOOH catalysts can efficiently drive the hydrogen evolution reaction and oxygen evolution reaction, respectively. Moreover, the electrolyzer consisting of IrNi/Ni(OH)2@PPy and IrNi/Ni(OH)2@FeOOH for water splitting requires only a low cell voltage of 1.49 V to deliver 10 mA cm−2. This study provides a useful strategy for constructing efficient electrocatalysts by synergistic composition modulation and interface engineering.
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高影响因子
Journal of Environmental Sciences
·
2021
·
IF 5.565
Jiaqi Shi,Rui Han,Shuangchun Lu,Qingling Liu
A series of highly-hydrophobic MIL-53-Al (MIL = Materials of Institut Lavoisier) frameworks synthesized via decoration of the Al-OH groups by alkyl phosphonic acid were developed as adsorbents for removing acetone from humid gas streams. The newly prepared materials were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), N 2 adsorption-desorption and thermogravimetric analysis (TGA). Their adsorption behaviors toward acetone vapor under dry and wet conditions were studied subsequently. Results showed that alkyl phosphonic acid was successfully grafted into MIL-53-Al skeleton through coordinating interaction with Al 3+ generating MIL-53-Al@C x ( x = 12, 14, 18). The MIL-53-Al@C x exhibited similar crystal structure and thermal stability to parent MIL-53-Al. Furthermore, the modified materials showed significantly enhanced hydrophobicity . The water vapor uptake of MIL-53-Al@C 14 decreased by 72.55% at 75% relative humidity (RH). Dynamic adsorption experiments demonstrated that water vapor had almost no effect on the acetone adsorption performance of MIL-53-Al@C 14 . Under the condition of 90% RH, the acetone adsorption capacity of MIL-53-Al@C 14 was 102.98% higher than that of MIL-53-Al. Notably, MIL-53-Al@C 14 presented excellent adsorption reversibility and regeneration performance in 10 adsorption-desorption cycles. Taken together, the strategy of metal-OH group modification is an attractive way to improve the acetone adsorption performance over metal-organic frameworks (MOFs) under humid conditions. Besides, MIL-53-Al@C 14 would be deemed as a promising candidate for capturing acetone in high moisture environment.
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高影响因子
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