CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yue Shi,Jiejie Bai,Aixin Ma,Zhitao Zou,Yanru Liu,Haifeng Lin,Dehong Chen,Ruiyong Zhang,Jianping Lai,Lei Wang
The superior electrocatalysts for seawater oxygen evolution reaction (OER) require fast kinetic to promote reactant (OH − ) transport and adsorption, and to optimize oxygenated intermediates (O* and OOH*) adsorption, but also high corrosion resistance by impeding Cl − adsorption under harsh seawater conditions, while the incomprehensive design greatly hinder the system advancement at high current densities. Herein, we propose orderly incorporating amorphous FeSe nanosheets as the dynamic anti-corrosion layer to reinforce charge redistribution of CoNi layered double hydroxide (LDH) nanosheets array and create favorable microenvironments. The ordered two-dimensional/three-dimensional structure prepared by novel non-equilibrium electrodeposition strategy allows amorphous FeSe component not only to activate CoNi-LDH for promoting OH − adsorption, optimizing oxygenated intermediates adsorption and increasing Cl − adsorption energy, but also repel Cl − by dynamic polyanion layer without blocking active sites, thus affording effective seawater OER with low overpotential, excellent stability and high selectivity at high current densities. The integrated CoNi-LDH/FeSe electrode delivers a small overpotential (338 mV at 500 mA cm −2 ) and possesses outstanding stability and selectivity during a 500-hour durability test at 500 mA cm −2 in alkaline seawater.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Chemistry-An Asian Journal
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2025
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IF 3.3
Pengkun Wei,Wenhui Zhang,Liuting Wang,Huayu Yao,Ruijuan Duan,Jianbiao Peng
Coupling of anodic oxygen evolution reaction (OER) and cathodic molecular oxygen activation (MOA) addresses the issues of conventional electrochemical advanced oxidation process (EAOP), such as parasitic anodic oxygen evolution and potential formation of halogenated byproducts in the presence of halogens, while the key to this process is an anodic O 2 supply generated from the hysteretic OER. Herein, we have constructed crystalline-amorphous cobalt–nickel-layered double hydroxide (CoNi-LDH) nanosheets by simple one-step ultrasound treatment as OER catalysts. Benefiting from the partially amorphous and porous structure, the CoNi-LDH heterojunction shows an overpotential of 260 mV to achieve a current density of 10 mA cm −2 . Besides, it also exhibits excellent electrochemical stability in basic media, which is significantly superior to the corresponding layered monometallic hydroxides. This work provides inspiration for optimizing the catalytic activity of OER electrocatalysts through combining crystalline and amorphous heterojunction, expecting the potential application in OER/MOA process.
研究领域:
电化学
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材料科学
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催化
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纳米技术
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环境工程
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产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2025
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IF 3.7
Xiao Wei,Xuan Fang,Shuming Ma,Huaqiang He,Zhixin Wu,Silin Li,Shihao Zhang,Pei Nian,Wenlan Ji,Yibin Wei
Addressing the contamination of antibiotics has attracted ever-increasing and imperative attention due to their widespread existence, easy-to-cause drug-resistant bacteria infection, coupled with their intrinsic toxicity and hazard to environments and human health. Herein, a novel CC/CoNi-LDH-10%Ce anode material was directly constructed through a simple and rapid electrodeposition strategy, serving as an efficacious electrocatalyst for removing ciprofloxacin (CIP) from aqueous solution. Such novel CC/CoNi-LDH-10%Ce anode delivered a higher charge transfer, relatively abundant oxygen vacancies, and a higher electrochemical active area. The as-fabricated CC/CoNi-LDH-10%Ce electrode achieved a substantially boosted CIP removal efficiency of 52.5% relative to that of pure CC at about 23.9%. Notably, doping an appropriate amount of Ce 3+ can endow the pristine CC/CoNi-LDH with richer oxygen vacancies and excellent electrocatalytic performance. Additionally, the electrocatalytic oxidation of CIP was attributed to both direct oxidation on the electrode surface and indirect oxidation induced by the generated active species (superoxide radicals and hydroxyl radicals). This study provides a simple, universal and flexible tactic for other researchers in designing and manufacturing avenues of electrodes.
研究领域:
环境科学
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材料科学
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电化学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2025
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IF 5.6
Amir Said,Binbin Qian,Ruiqian Zhang,Chunlei Yang,Ke Xu,Kunfeng Chen,Dongfeng Xue
The development of electrocatalysts with bifunctionality in acidic media is crucial for advancing proton exchange membrane water electrolyzers to produce clean hydrogen fuel. Herein, an efficient bifunctional RuO 2 /MoO x /CoNi-LDH nanocomposite was synthesized for the first time via a coprecipitation and two-step hydrothermal method and used as an electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), thereby contributing to efficient overall water splitting (OWS). When used as an electrocatalyst in 0.5 M H 2 SO 4 , the RuO 2 /MoO x /CoNi-LDH requires an overpotential of 185, 221, and 262 mV for OER and 33, 65, and 101 mV for HER to reach the current density of 20, 50, and 100 mA/cm 2 , respectively. The improved electrochemical performances of RuO 2 /MoO x /CoNi-LDH are well supported by a low charge transfer resistance, high electrochemical surface area, optimized nanocomposite structure, and the synergistic interaction among the RuO 2 NPs, MoO x nanosheet (NSs), and CoNi-LDH. Importantly, in acidic OWS, bifunctional RuO 2 /MoO x /CoNi-LDH exhibits excellent activities and merely requires a low voltage of 1.53 V to reach the current density of 20 mA/cm 2 , lower than most of the mixed-metal-based bifunctional electrocatalysts reported in acidic media. This study provides an efficient and cost-effective method for preparing high-performance mixed-metal nanocomposites for electrochemical water splitting in acidic environments and beyond.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2022
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IF 10.53
Wenji Zheng,Jingbang Yu,Zhongyue Hu,Xuehua Ruan,Xiangcun Li,Yan Dai,Gaohong He
Layered double hydroxide (LDH) bearing numerous hydroxyl groups shows high affinity with CO 2 and is promising in mixed matrix membranes (MMMs) based CO 2 capture. However, its non-porous structure limits the further improvement of CO 2 permeability. In this work, 3D hollow CoNi-LDH nanocages were developed to construct low-resistance and CO 2 -philic transport channel in MMM by in-situ etching of ZIF-67 template. The resultant material exhibits hollow structure with cavity size of about 500 nm, mesopores and micropores from LDH stacking and ZIF-67 template. The outer layered CoNi-LDH nanosheets can attract more CO 2 molecules by their abundant hydroxyl groups, resulting in an improvement in dissolution selectivity of CO 2 over N 2 . Meanwhile, the tortuous gas diffusion paths originated from 2D nanosheet stacking can further enhance the CO 2 selectivity over N 2 . Moreover, the hollow nanocages provide CO 2 molecules with fast transport path, resulting in high CO 2 permeability. As a result, compared with pure Pebax membrane and 2D LDH/Pebax MMM, all the 3D hollow CoNi-LDH/Pebax MMMs present enhanced CO 2 permeability. The 3D hollow CoNi-LDH-2h/Pebax MMM performs the highest CO 2 permeability of 135.49 Barrer, which are increased by 141.95% and 71.50% than those of the above two membranes, respectively. The selectivity of 3D hollow CoNi-LDH-2h/Pebax MMM is about 26.30% higher than that of the pure Pebax membrane. The present membrane presents comparable CO 2 capture capacity in contrast with most reported Pebax based MMMs and surpasses the Robeson upper bond. Together with the good long-term stability, the 3D hollow CoNi-LDH nanocages are believed to be a promising candidate for MMMs to improve CO 2 capture.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2022
·Vol. 10
·期 31
·16439-16447
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IF 14.511
Bin Fang,Zipeng Xing,Fan Du,Weifeng Kong,Zhenzi Li,Wei Zhou
Sono-photocatalysis is considered a promising strategy for water decontamination and hydrolysis, and it is crucial to improve the sensitivity of the catalyst to mechanical forces to obtain more energy. In a single photocatalyst, the hollow structure refracts sunlight many times to improve light utilization, but with a sono-photocatalyst, can the hollow structure refract sound waves to enhance the sound field energy? This paper reports formation of CdS with different structures by controlling the etching rate and wrapping with hollow defective CoNi-LDH (HD-CoNi-LDH) to form a bilayer porous hollow framework structure. Characterization confirmed that evolution of CdS from the solid gave the bilayer a hollow framework state and improved the degree of sound field energy absorption. It was further shown that the honeycomb-like porous structure of HD-CoNi-LDH enhanced sound field energy absorption, which then acted on CdS to enable piezoelectric photocatalysis. Specifically, strong sound field absorption by hollow CdS@HD-CoNi-LDH increased the hydrogen precipitation rate by 3.5 times and the degree of bisphenol A degradation by approximately 30% compared to solid CdS. This work provides a new perspective for sono-photocatalysis.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Yu Zhang,Wangfeng Cai,Yajie Guo,Yan Wang
In this work, a nanosheet-assembled core-shell structure composite of Co-Ni-S@CoNi-LDH was prepared on Ni foam via hydrothermal synthesis , in which Co-Ni-S nanowires as cores were assembled with the shell of CoNi-LDH nanosheets. The combination of the high conductivity of Co-Ni-S, the high specific surface area of CoNi-LDH and the multivalent state of Ni and Co provided more active sites, short and effective ion transport paths, and great synergy, which played significant roles in the excellent performance of Co-Ni-S@CoNi-LDH. Meanwhile, the nanosheet-assembled core-shell structure improved the overall stability. Based on the characterisation and the performance measurements, the Co-Ni-S@CoNi-LDH electrode showed an excellent electrochemical performance. The Co-Ni-S@CoNi-LDH electrode acquired a specific capacitance of 2414 F/g at a 1 A/g current density and a high cycle stability with an 89.7% retention after 3000 cycles. The assembled hybrid supercapacitor Co-Ni-S@CoNi-LDH//AC delivered a high energy density of 59.11 Wh kg −1 at an 855.43 W kg −1 power density, as well as an excellent rate performance of 81% after 5000 cycles at a 5 A/g current density, showing good potential for practical applications.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Shikun Hou,Ying Wang,Feng Gao,Hua Yang,Fei Jin,Li Ren,Qiong Wu,Hongliang Ge,Yahui Wang
This paper proposes a new and unprecedented strategy for designing efficient and ultra-light electromagnetic wave (EMW) absorbing materials. The strategy utilizes a nano-antenna arrays structure to capture EMW. Specifically, CoNi-layered double hydroxide (CoNi-LDH) nanoneedles are designed on the surface of carbon fiber cloth (CFC) using a solvothermal method, whereafter an in situ chemical oxidative polymerization process is employed to construct polyaniline (PANI) coating on these CoNi-LDH nanoneedles. The resultant composite, named PANI@CoNi-LDH@CFC, possesses the unique shell-core PANI@CoNi-LDH nano-antenna arrays and thus exhibits enhanced EMW absorption performance. The PANI@CoNi-LDH@CFC composite obtains an effective absorption bandwidth of 14.8 GHz (1.0–5.0 mm) and a minimum reflection loss of −57.6 dB. In particular, computer simulation technology confirms that the radar cross section values of PANI@CoNi-LDH@CFC are lower than −16.4 dBm 2 in the range of −60°<θ < 60°, indicating a high radar wave attenuation ability. This work pioneers the research on design of nano-antenna arrays structure to strengthen EMW capture and opens up a unique path for constructing high-performance EMW absorbing materials.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
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2024
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IF 4.3
Lu-Nan Zhang,Guang-An Jia,Cheng Ma,Meng-Qi Jia,Tang-Suo Li,Lu-Bin Ni,Guo-Wang Diao
The electrocatalytic reduction of NO2– (NO2RR) holds promise as a sustainable pathway to both promoting the development of emerging NH3 economies and allowing the closing of the NOx loop. Highly efficient electrocatalysts that could facilitate this complex six-electron transfer process are urgently desired. Herein, tremella-like CoNi-LDH intercalated by cyclic polyoxometalate (POM) anion P8W48 (P8W48/CoNi-LDH) prepared by a simple two-step hydrothermal–exfoliation assembly method is proposed as an effective electrocatalyst for NO2– to NH3 conversion. The introduction of POM with excellent redox ability tremendously increased the electrocatalytic performance of CoNi-LDH in the NO2RR process, causing P8W48/CoNi-LDH to exhibit large NH3 yield of 0.369 mmol h–1 mgcat–1 and exceptionally high Faradic efficiency of 97.0% at −1.3 V vs the Ag/AgCl reference electrode in 0.1 M phosphate buffer saline (PBS, pH = 7) containing 0.1 M NO2–. Furthermore, P8W48/CoNi-LDH demonstrated excellent durability during cyclic electrolysis. This work provides a new reference for the application of POM-based nanocomposites in the electrochemical reduction of NO2– to obtain value-added NH3.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
·
IF 2.8
Minghang Yang,Qiongxia Liu,Mingguang Zhang,Yu Deng,Cheng Liu,Fangyuan Hu,Xigao Jian,Yousi Chen
The rapid development of flexible electronic devices has placed higher demands on the development of high-performance flexible supercapacitors. In this work, a safe and simple method was developed to prepare cobalt–nickel layered double hydroxide (CoNi-LDH) flexible electrodes. Metal–organic framework (MOF)-derived CoNi-LDH was successfully grown on the surface of polypropylene nonwoven flexible carbon fiber membranes through plasma oxidation treatment, grafting of cobalt-based MOFs, and room-temperature etching in Ni 2+ solution. The prepared flexible modified carbon fiber membrane (CPO-CoNi-40-0.5) has good mechanical properties with a tensile strength of 159.26 ± 63.03 kPa. In addition, the CPO-CoNi-40-0.5 electrode has a high specific capacitance of 580 F g −1 at 1 A g −1 . The assembled supercapacitor maintains 99% of the initial specific capacity after 7000 cycles and 98% of the initial specific capacity when it is folded at 90°, showing excellent long cycle stability and bending resistance. This paper provides a new way to promote the development of high-performance and low-cost flexible electrodes.
研究领域:
材料科学
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能源存储
·
柔性电子
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2023
·
IF 4.5
Zhihao Song,Qingkun Meng,Fuxiang Wei,Qing Yin,Yanwei Sui,Jiqiu Qi
Cobalt-based metal–organic framework (MOF) is commonly used as templates to prepare layered double hydroxides (LDHs) with specific morphology to improve the pseudocapacitance capacity. A multi-step synthesis method was employed in the reported work to introduce a second metal during the preparation process of bimetallic LDH materials. Herein, we disclosed a facile and efficient one-step in-situ hydrolysis strategy to prepare CoNi-LDH under mild condition using CoNi-MOF precursor, which introduces Ni element in the Co-MOF nucleation process. The method for synthesizing CoNi-LDH with nanoflower structure can omit the past time-consuming synthesis process and the complex modification process. The obtained CoNi-LDH at 60 °C achieves specific capacitance as high as 1634.1F g −1 at a current density of 1 A g −1 . The assembled CoNi-LDH-24//RGO ASC deliver high energy density of 48.97 Wh kg −1 at the power density of 787.16 W kg −1 , and the capacitance retention after 10,000 cycles can reach 81.7%. This work provides a mild and simple method to synthesize 3D structure LDH materials with excellent supercapacitor performance, and further confirms that the in-situ hydrolysis method is feasible and promising in the preparation of 3D CoNi-LDH nanoflowers.
研究领域:
材料科学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Qinshan Xie,Zhongxin Song,Lei Zhang,Qianling Zhang,Xiangzhong Ren,Yongliang Li
Manipulating internal charge migration pathways by regulating the electron distribution is an effective strategy to enhance photogenerated carriers separation and migration, which is critical for advancing photocatalytic water reduction technology. Using zeolitic imidazolate framework-67 (ZIF-67) as the precursor, chemical etching facilitates the growth of uniform and dense CoNi-layered double hydroxide (CoNi-LDH) nanosheets along the cubic shell, ultimately forming CoNi-LDH hollow nanocages. Additionally, A type-II heterojunction with precisely controlled TiO x thickness, denoted as CoNi-LDH/TiO x , was engineered using atomic layer deposition (ALD). This technique takes the advantage of the unique self-limiting reactions of ALD to achieve atomic-level thickness control, which is crucial for the spatial separation of photogenerated carriers. Consequently, this promotes the migration efficiency of these carriers. The optimized CoNi-LDH/TiO x photocatalyst achieved a hydrogen production rate of 5.239 mmol g −1 h −1 , showing a fourfold increase in efficiency. These results provide valuable insights for future research and development in the field of photocatalytic hydrogen production, particularly when utilizing LDH-based catalysts.
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DOI
高影响因子
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