CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Chen Li,Yaowen Zhang,Min Yuan,Yang Liu,Haikuo Lan,Zhenjiang Li,Kang Liu,Lei Wang
Regulating the atomic coordination ambiance of uniformly distributed single atoms (SAs) via heteroatom doping is an up-and-coming method to facilitate the catalytic activity for oxygen reduction reactions (ORR). With the cooperative interaction of dual heteroatom doping supplied extra degrees of freedom, a greater efficiency of ORR can be realized via a reduction in intermediate energy barrier during catalytic reactions. Here, we explore a fresh approach to generate N, S co-doped Fe-SA in embedded porous carbon nanosheets/carbon nanotubes (Fe-N X @NSCST-ZL) utilizing a 2D leaf-shaped MOF as a template in this work. Taking advantage of the combined effect of carbon matrix and nanotubes as well as the abundance of Fe-N X active sites and thiophene-S, the Fe-N X @NSCST-ZL provides exceptional performance for ORRs with a half-wave potential of 0.94 V at alkaline conditions, 0.77 V at acidic conditions, and 0.74 V at neutral conditions (V vs. RHE). Furthermore, Fe-N X @NSCST-ZL-based Zn-air battery, as well as quasi solid-state flexible battery, maintain steady operation for 765 h and 30 h with a small discharge/charge interval, respectively. This work contributes perspectives on the reasonable design of economical single-atom catalysts (SACs) for applications in energy conversion that have outstanding electrocatalytic potential.
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高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 20
·9517-9527
·
IF 9.931
Bohong Chen,Zhongqing Jiang,Jianlin Huang,Binglu Deng,Lingshan Zhou,Zhong-Jie Jiang,Meilin Liu
Proper control of the size and composition distribution and oxidation state of metal ions is of great importance to develop mixed transition metal oxides with advanced catalytic activities for oxygen reduction (ORR) and evolution reactions (OER), both of which are pivotal processes related to many renewable energy related technologies. Herein, a cation exchange reaction is employed for the synthesis of NixCo(3−x)O4 nanoparticles (NPs) supported on aminated carbon nanotubes (NixCo(3−x)O4/NH2-CNTs). The obtained NixCo(3−x)O4/NH2-CNTs shows an enhanced catalytic bifunctionality for the ORR and OER. Specifically, the NixCo(3−x)O4/NH2-CNTs can deliver ORR onset (Eonset) and half-wave potentials (E1/2) of 0.954 and 0.863 V vs. RHE, respectively, and only needs an overpotential of 386 mV to deliver a current density of 10 mA cm−2. The ORR catalytic activity of the NixCo(3−x)O4/NH2-CNTs is comparable to that of the Pt/C (with an Eonset and E1/2 of 0.964 and 0.858 V vs. RHE, respectively), while its OER activity is higher than that of RuO2/C. Additionally, the NixCo(3−x)O4/NH2-CNTs exhibits a potential difference of 0.764 V in the OER current density at 10 mA cm−2 and the ORR current density at 3 mA cm−2, which is lower than those of most state-of-the-art catalysts. Most interestingly, the Zn–air battery with the NixCo(3−x)O4/NH2-CNTs shows higher durability and performance than the batteries with Pt–RuO2/C (an integrated catalyst consisting of Pt/C and RuO2/C). These results clearly demonstrate that the NixCo(3−x)O4/NH2-CNTs is a durable and efficient bifunctional catalyst with great potential for practical applications.
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 10
·5305-5316
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IF 14.511
Yibo Tang,Ying Lei,Guijun Li,Tiantian Fu,Yang Xiang,Jingqi Sha,Hai Yang,Peng Yu,Yujun Si,Chaozhong Guo
In this work, a bifunctional oxygen catalyst containing both spinel structure sites and nitrogen doping sites was prepared based on a directional regulation strategy by adding Ni(OH)2 into a Fe3+–melamine precursor and then pyrolyzing the mixture. Melamine was pyrolyzed into N-doped carbon nanotubes, which afford oxygen reduction reaction (ORR) active sites, and meanwhile, the generated NiFe2O4 particles can act as active components for oxygen evolution reactions (OERs). The as-prepared catalyst named Fe–Me–Ni exhibits excellent bifunctional activities for ORRs with a half-wave potential of 0.841 V, and for OERs with an overpotential of 313 mV at 10 mA cm−2. The Zn–air battery fabricated from Fe–Me–Ni can work at a discharge voltage of 1.23–1.28 V with a specific capacity of 798 mA h gZn−1 at 10 mA cm−2, outperforming those of the Pt/C + RuO2 catalyst (1.17–1.24 V, 787 mA h gZn−1). The battery evaluation results also indicate the remarkable rechargeability and long-term cycling stability of the catalyst Fe–Me–Ni in practical applications.
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Advanced Composites and Hybrid Materials
·
2023
·Vol. 6
·期 3
·1-12
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IF 20.1
Cui Zhixiang,Zhou Jixiang,Wang Xiaolong,Wang Qianting,Si Junhui,Liu Xiaolong
Recently, aqueous nickel-zinc (Ni-Zn) batteries have abundant application potential due to its large-scale energy storage systems. However, traditional cathode materials still have the disadvantage of having much lower specific capacity than their theoretical capacity and poor cycle performance. The development of bond-free flexible cathode electrodes for high-performance aqueous Zn batteries remains a tremendous challenge. Herein, a simple method was reported to in situ grow NiCo 2 S 4 acicular nanowire arrays encapsulated by nitrogen-doped carbon on carbon cloth (denoted as CC@NC-NiCo 2 S 4 ) as binder-free and flexible electrode for high-performance aqueous Zn batteries. When CC@NC-NiCo 2 S 4 was used as a stand-alone cathode material, the prepared aqueous CC@NC-NiCo 2 S 4 //Zn battery exhibits excellent rate capability (0.58 mAh cm −2 at 2 mA cm −2 and 0.46 mAh cm −2 at 20 mA cm −2 ) and superior cycling performance (80% capacity retention at 4.65 A g −1 after 1000 cycles, based on the NiCo 2 S 4 active material). More importantly, a quasi-solid-state CC@NC-NiCo 2 S 4 /Zn cell has also been fabricated and exhibits an outstanding energy density of 238 Wh kg −1 at a power density of 1.27 kW kg −1 and 89% capacitance retention for 500 cycles with 5 mA cm −2 . Those results showed that it is much higher than that of other reported (Ni-Zn) batteries, indicating its excellent potential practical applications for high-performance aqueous Zn batteries. Graphical Abstract Novel electrode functionalized with NiCo 2 S 4 nanowire arrays encapsulated by carbon was synthesized and exhibits excellent performance for aqueous Zn batteries.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haoran Pan,Chen Zhang,Zhenjie Lu,Jinxiao Dou,Xinning Huang,Jianglong Yu,Jiabin Wu,Huaiguang Li,Xingxing Chen
Zinc-air batteries (ZABs) as promising energy storage technologies have shown immense advantages of high energy density, abundant zinc reserves, low cost, and high safety. However, the sluggish oxygen reduction reaction (ORR) kinetics at the cathode still limits their overall performances. Herein, we fabricated a self-supported N-doped Co/Zn-carbon nanofiber membrane (Co/Zn@NCF) with superior activity and durability for the ORR. The liquid ZABs based on Co/Zn@NCF catalysts exhibited a cycling life of over 666 h with a charge/discharge voltage difference of 0.64 V and a voltage efficiency of 66 %. The fabricated flexible solid-state ZAB enables it to be stably charged and discharged under different bending angles. Strikingly the temperature-controlled scanning electrochemical microscopy (SECM) was developed to probe the local activity and selectivity of membrane-like Co/Zn@NCF at a submicrometer scale. This study provides an effective way for the development of self-supported catalysts for energy conversion devices and offers the in-operando technique for the analysis of catalysts in various operating temperatures.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 42
·19569-19577
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IF 3.3
Xiaoqi Zhao,Xue Zhang,Yingxiao Li,Ling Liu,Yanfang Gao
Developing non-precious metal catalysts for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) is critical for Zn–air batteries. Herein, using NaCl and ammonium oxalate as templates to prepare a hierarchical porous Fe–N–C catalyst using an inorganic salt melting strategy is proposed. The prepared Fe–N–C-x catalysts have a hierarchical porous structure that increases the specific surface area, improves the exposure of a number of active sites and enhances the chance of contacting active sites. The structure change of a leaf-shaped zeolitic imidazolate framework (ZIF-L) during high-temperature pyrolysis was used to self-catalyze the growth of carbon nanotube structures, forming a structure of carbon nanotubes including Fe nanoparticles to provide additional active sites and reduce the aggregation of metal particles. From the perspective of economy and electrochemical performance, it is found that when the addition amount of NaCl and ammonium oxalate respectively is 2 g, the electrochemical performance of the ORR, OER and Zn–air batteries is better, and the preparation cost of the catalyst is more affordable. This strategy of forming hierarchical porous Fe–N–C catalysts by self-catalytic growth of Fe, N co-doped CNTs using inorganic salts provides a new design idea for the preparation of new hierarchical porous electrocatalysts.
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Ziqiang Zhang,Shu Huang,Yuanming Wang,Fengquan She,Yulong Jiao,Xue Wang,Guohui Yuan
Inhibiting dendrite formation, hydrogen evolution, and anode corrosion is essential for durable aqueous Zn-ion batteries (AZIBs). Herein, we fabricated multifunctional hollow carbon nanofibers (HCNFs), which are employed as a shielding layer for the Zn anode (Zn@HCNF). The synergistic effect of N, O co-doping, which introduces zincophilic sites, and the unique 3D hierarchical porous architecture of the HCNFs coating, which provides hollow channels for low-tortuosity diffusion, results in facilitated ion transport, reduced interfacial impedance, and thus, remarkably improved reaction kinetics. Concurrently, the coating provides a uniform deposition space for Zn 2+ , inducing its crystallographic orientation toward the (002) crystal plane (with the texture coefficient increasing from 0.95 to 2.23 after 50 h of cycling). Its prominent hydrophobicity (with the electrode contact angle increasing from 76° to 135°) further suppresses hydrogen evolution and corrosion by blocking direct exposure of metallic zinc to reactive water molecules. Consequently, the Zn@HCNF symmetric cells exhibit a prolonged cycling lifespan of over 1500 h under an areal capacity of 2.5 mAh cm −2 , and over 1200 h at an ultrahigh current density of 20 mA cm −2 , outperforming most existing analogous 3D porous coated zinc anodes. The HCNF coating effectively tackles the key anode challenges, offering a promising strategy for advanced AZIBs.
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COMPUTERS AND ELECTRONICS IN AGRICULTURE
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2026
·
IF 10.3
Liru Yan,Bianxiang Zhang,Wei Zhou,Chao Feng,Caihong Zhang,Yan Zhang,Shaomin Shuang,Lihong Shi
Highly-intelligent user-friendly sensing strategies are becoming desperately demanded and indispensable in under-developed nations and resources-insufficient areas. Herein, an intelligent sensing platform has been successfully established incorporating smartphone with machine vision and deep learning function, 3D-printed handheld device, and paper microfluidic chip stained with tri-emission ratiometric-fluorescence (FL) carbon dots (TCDs). The intelligent system can quantify zinc ion (Zn 2+ ) and ethylenediaminetetraacetic acid (EDTA) only through a single-step operation on smartphone. TCDs, engendering bright blue and cyan FL as well as weak red one at 370 nm excitation, were prepared hydrothermally using tartaric acid and alizarin carmine. As-prepared TCDs exhibit continuous FL color transformation from blue to purple to blue with the addition of Zn 2+ and EDTA. Subsequently, TCDs-based paper chip is explored to enable field-portable sequential discrimination of Zn 2+ and EDTA. Intriguingly, the proposed sensor is utilized for fast and intelligent quantification of Zn 2+ and EDTA in soil filtrate, plant sap and tap water with a low detection limit of 3.8 μM and 7.9 μM, as well as wide linear correlations of 0–280 µM and 0–560 µM, respectively. It is eagerly anticipated that our methodologies will become the strong impetus for new round of technological transformation for analyte assay.
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ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Bingnan Wang,Di Chen,Hongzhou Dong,Yan Huang,Lina Sui,Beili Pang,Shuai Ma,Lifeng Dong,Liyan Yu
Metal-free and metal-based electrocatalysts are designed according to different principles, but there should be an intimate connection between them. In this work, a simple yet cost-effective strategy is proposed to etch and disperse graphene oxide (GO) and porous hollow carbon shell loaded with CoS 2 (PHCS-CoS 2 ) into a porous skeleton similar to "highway" to effectively "trap" graphene oxide quantum dots (GOQDs) via a one-step process. Due to interconnected networks and size effects, N-S codoped porous graphene carbon sheets along with GOQDs (N,S-PGCS(QDs)) have eminent properties for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Furthermore, the metal-free system can be transformed to a metal-based electrocatalyst (N,S-PGCS(QDs)-Co 1-x S/Co 9 S 8 ) loaded with Co 1-x S/Co 9 S 8 nanohybrids , which demonstrates superior electrocatalytic characteristics than Pt/C+RuO 2 in terms of half-wave potential (0.85 V), current density, methanol tolerance, the potential difference between E ORR1/2 and E OER10 (0.68 V), and long-term stability. The Zn-air battery assembled with N,S-PGCS(QDs)-Co 1-x S/Co 9 S 8 shows a large peak power density of 168.2 mW cm −2 , a capacity performance up to 817.9 mAh g −1 , an ultra-high specific energy density of 973.3 Wh kg Zn −1 and considerable durability. The findings above may provide a scalable synthetic guidance and a novel direction for the design of metal-free and metal-based electrocatalysts.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2025
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IF 3.3
Vu Thi Huong Mai,Thi Lan Huong Phung,Nguyen Ngoc Huyen,Dinh Ngo Xuan,Anh-Tuan Le
The adjustment of active metal ion centers and electronic structures for boosting the electrocatalytic activity of spinel oxide nanostructures is considered an efficient strategy for developing the advanced high-performance electrochemical sensors. Here, ZnCo2O4 (ZCO-NPs) and Co3O4 nanoparticles with a tendency to self-assembly into 1D nanostructure were prepared by a one-pot microwave-assisted hydrothermal method, and evaluated the electrochemical sensing performance towards small dopamine (DA) molecule in biofluid samples. The physicochemical properties were studied by combining experiments and density functional theory (DFT) calculation. The DFT calculation results indicate the ZnCo2O4 possesses the strongest affinity for dopamine amongst three tested biomolecules (ascorbic acid, dopamine, uric acid), while Co3O4 shows a higher affinity for ascorbic acid. Benefiting from the adjustment of surface catalyst centers and electronic structures induced by Zn substitution, the ZCO-NPs/SPE exhibited an approximate 36.6-fold increased electrochemical sensitivity towards DA than that of Co3O4-NPs. The ZCO-NPs-based electrochemical sensors also displayed outstanding performance in detection of DA with a detection limit as low as 56 nM, and reaching an electrochemical sensitivity of 5.2 µAµM-1cm-2. This work provides an innovative strategy based on reliable theoretical and experimental basis for the electronic structural regulation of spinel oxide nanostructures for ultrasensitive electrochemical sensing of small molecules
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Small
·
2021
·Vol. 17
·期 46
·2101887
·
IF 13.281
Jian Feng,Shao-hua Luo,Sheng-xue Yan,Yang Zhan,Qing Wang,Ya-hui Zhang,Xin Liu,Long-jiao Chang
Transition-metal selenides (TMSs) have emerged as prospective anode materials for sodium ion batteries (SIBs), owing to their considerable theoretical capacity and intrinsic high electronic conductivity. Whereas, TMSs still suffer from poor rate capability and inferior cycling stability induced by sluggish kinetics and severe volume changes during de/sodiation processes. Herein, a hierarchical composite consisting of a zinc-cobalt bimetallic selenide yolk and nitrogen-doped double carbon shell (denoted as Zn Co Se@NDC) is engineered and fabricated successfully. The architecture of the as-fabricated material improves the Na-ion storage performance via increasing the electron transfer kinetics, accommodating volume expansion, and mitigating the generation of by-products. As expected, the Zn Co Se@NDC electrode delivers superior sodium storage performance with long cycling stability (344.5 mAh g −1 at 5.0 A g −1 over 2000 long-term cycles) and high-rate performance (319.2 mAh g −1 at 10.0 A g −1 ). Meanwhile, the NVP@C//Zn Co Se@NDC full SIB cells are constructed successfully, retaining 96.3% of its initial capacity at 0.5A g −1 after 200 loops. The outstanding electrochemical performance and the construction of hybrid SIBs will have far-reaching influences on the development of the various rechargeable batteries.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Wenming Zhang,Xinyan Zhao,Youwei Zhao,Jiaqing Zhang,Xiaoting Li,Lide Fang,Ling Li
Herein, we first propose a facile strategy to synthesize Co9S8 and MoS2 nanocrystals embedded in porous carbon nanoflake arrays supported on carbon nanofibers (Co9S8-MoS2/N-CNAs@CNFs) by the pyrolysis of Mo-doped Zn, Co zeolitic imidazolate framework grown on carbon nanofibers and subsequent sulfuration. The electrocatalyst shows high and stable electrocatalytic performance, with a half-wave potential of 0.82 V for oxygen reduction reaction and an overpotential at 10 mA cm–2 for oxygen evolution reaction (0.34 V) and hydrogen evolution reaction (0.163 V), which outperform the metal–organic framework-derived transition metal sulfide catalysts reported so far. Furthermore, the Co9S8-MoS2@N-CNAs@CNFs are employed as an air cathode in a liquid-state and all-solid-state zinc-air battery, presenting high power densities of 222 and 96 mW cm–2, respectively. Such excellent catalytic activities are mainly owing to the unique three-dimensional structure and chemical compositions, optimal electronic conductivity, adequate surface area, and the abundance of active sites. Thus, this work provides an important method for designing other metal–organic framework-derived three-dimensional structural sulfide quantum dot multifunctional electrocatalysts for wider application in highly efficient catalysis and energy storage.
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高影响因子
危险品化学品经营许可证（带存储）