keyword
https://read.qxmd.com/read/38494450/stabilizing-lattice-oxygen-through-mn-doping-in-nico2o4-d-spinel-electrocatalysts-for-efficient-and-durable-acid-oxygen-evolution
#1
JOURNAL ARTICLE
Hongyu Zhao, Liu Zhu, Jie Yin, Jing Jin, Xin Du, Lei Tan, Yong Peng, Pinxian Xi, Chun-Hua Yan
Design the electrocatalysts without noble metal is still a challenge for oxygen evolution reaction (OER) in acid media. Herein, we reported the manganese doping method to decrease the concentration of oxygen vacancy (Vo) and form the Mn-O structure adjacent octahedral sites in spinel NiCo2O4-δ (NiMn1.5Co3O4-δ), which highly enhanced the activity and stability of spinel NiCo2O4-δ with a low overpotential (η) of 280 mV at j = 10 mA cm-2 and long-term stability of 80 h in acid media. The isotopic labelling experiment based on differential electrochemical mass spectrometry (DEMS) clearly demonstrated the lattice oxygen in NiMn1...
March 17, 2024: Angewandte Chemie
https://read.qxmd.com/read/38467066/an-interpretation-for-the-components-of-2p3-2-core-level-x-ray-photoelectron-spectra-of-the-cations-in-some-inverse-spinel-oxides
#2
JOURNAL ARTICLE
Arjun Subedi, Detian Yang, Wai Kiat Chin, Binny Tamang, Sushrisangita Sahoo, Paul Yancey, Rifat Mahbub, Jeffrey Shield, Rebecca Y Lai, Xiaoshan Xu, Peter A Dowben, Vijaya Rangari
In an effort to reconcile the various interpretations for the cation components of the 2p3/2 observed in X-ray photoelectron spectroscopy (XPS) of several spinel oxide materials, the XPS spectra of both spinel alloy nanoparticles and crystalline thin films are compared. We observed that different components of the 2p3/2 core level XPS spectra of these inverse spinel thin films are distinctly surface and bulk weighted, indicating surface-to-bulk core level shifts in the binding energies. Surface-to-bulk core level shifts in binding energies of Ni and Fe 2p3/2 core levels of NiFe2O4 thin film are observed in angle-resolved XPS...
March 11, 2024: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://read.qxmd.com/read/38461552/nico2o4-sns2-nanosheets-on-carbon-cloth-as-efficient-bi-functional-material-for-high-performance-supercapacitor-and-sensor-applications
#3
JOURNAL ARTICLE
Maria Bibi, Yanlong Yu, Amjad Nisar, Amina Zafar, Yanguo Liu, Shafqat Karim, Sheeraz Mehboob, Yasir Faiz, Hongyu Sun, Tahir Ali, Atia Khalid, Amna Safdar, Faisal Faiz, Mashkoor Ahmad
Bi-functional materials provide an opportunity for the development of high-performance devices. Up till now, bi-functional performance of NiCo2O4@SnS2 nanosheets is rarely investigated. In this work, NiCo2O4@SnS2 nanosheets were synthesized on carbon cloth by utilizing a simple hydrothermal technique. The developed electrode (NiCo2O4@SnS2/CC) was investigated for the detection of L-Cysteine and supercapacitors applications. As a non-enzymatic sensor, the electrode proved to be highly sensitive for the detection of L-cysteine...
March 10, 2024: Nanotechnology
https://read.qxmd.com/read/38404154/fe-n-inducing-interfacial-electron-redistribution-in-nico-spinel-on-biomass-derived-carbon-for-bi-functional-oxygen-conversion
#4
JOURNAL ARTICLE
Yanyan Liu, Limin Zhou, Shuling Liu, Shuqi Li, Jingjing Zhou, Xin Li, Xiangmeng Chen, Kang Sun, Baojun Li, Jianchun Jiang, Huan Pang
Herein, an interfacial electron redistribution is proposed to boost the activity of carbon-supported spinel NiCo2O4 catalyst toward oxygen conversion via Fe, N-doping strategy. Fe-doping into octahedron induces a redistribution of electrons between Co and Ni atoms on NiCo1.8Fe0.2O4@N-carbon. The increased electron density of Co promotes the coordination of water to Co sites and further dissociation. The generation of proton from water improves the overall activity for the oxygen reduction reaction (ORR)...
February 25, 2024: Angewandte Chemie
https://read.qxmd.com/read/38300878/ultralow-electric-current-assisted-magnetization-switching-due-to-thermally-engineered-magnetic-anisotropy
#5
JOURNAL ARTICLE
Qin Du, Wenli Wang, Fan Tang, Wei Su, Jingen Wu, Zhongqiang Hu, Zhiguang Wang, Ming Liu
Control of magnetic anisotropy in thin films with perpendicular magnetic anisotropy is of paramount importance for the development of spintronics with ultralow-energy consumption and high density. Traditional magnetoelectric heterostructures utilized the synergistic effect of piezoelectricity and magnetostriction to realize the electric field control of magnetic anisotropy, resulting in additional fabrication and modulation processes and a complicated device architecture. Here, we have systematically investigated the electric current tuning of the magnetic properties of the metallic NiCo2 O4 film with intrinsic perpendicular magnetic anisotropy...
February 1, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38202785/h-2-s-butane-dual-gas-sensing-based-on-a-hydrothermally-synthesized-mxene-ti-3-c-2-t-x-nico-2-o-4-nanocomposite
#6
JOURNAL ARTICLE
Shama Sadaf, Hongpeng Zhang, Ali Akhtar
Real-time sensing of hydrogen sulfide (H2 S) at room temperature is important to ensure the safety of humans and the environment. Four kinds of different nanocomposites, such as MXene Ti3 C2 Tx , Ti3 AlC2 , WS2 , and MoSe2 /NiCo2 O4 , were synthesized using the hydrothermal method in this paper. Initially, the intrinsic properties of the synthesized nanocomposites were studied using different techniques. P-type butane and H2 S-sensing behaviors of nanocomposites were performed and analyzed deeply. Four sensor sheets were fabricated using a spin-coating method...
December 29, 2023: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/38202736/sea-urchin-like-nico-2-o-4-catalyst-activated-peroxymonosulfate-for-degradation-of-phenol-performance-and-mechanism
#7
JOURNAL ARTICLE
Chunguang Chen, Junkai Zhang, Jia Liu, Jiani Li, Shuo Ma, Aishui Yu
How to efficiently activate peroxymonosulfate (PMS) in a complex water matrix to degrade organic pollutants still needs greater efforts, and cobalt-based bimetallic nanomaterials are desirable catalysts. In this paper, sea urchin-like NiCo2 O4 nanomaterials were successfully prepared and comprehensively characterized for their structural, morphological and chemical properties via techniques, such as X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), among others...
December 26, 2023: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://read.qxmd.com/read/38164883/plasma-engineering-of-oxygen-vacancies-on-nico-2-o-4-nanowires-with-enhanced-bifunctional-electrocatalytic-performance-for-rechargeable-zinc-air-battery
#8
JOURNAL ARTICLE
He Li, Jihao Wang, Tim Tjardts, Igor Barg, Haoyi Qiu, Martin Müller, Jan Krahmer, Sadegh Askari, Salih Veziroglu, Cenk Aktas, Lorenz Kienle, Jan Benedikt
Designing an efficient, durable, and inexpensive bifunctional electrocatalyst toward oxygen evolution reactions (OER) and oxygen reduction reactions (ORR) remains a significant challenge for the development of rechargeable zinc-air batteries (ZABs). The generation of oxygen vacancies plays a vital role in modifying the surface properties of transition-metal-oxides (TMOs) and thus optimizing their electrocatalytic performances. Herein, a H2 /Ar plasma is employed to generate abundant oxygen vacancies at the surfaces of NiCo2 O4 nanowires...
January 2, 2024: Small
https://read.qxmd.com/read/38161269/nis-nico-2-o-4-cooperative-interfaces-enable-fast-sulfur-redox-kinetics-for-lithium-sulfur-battery
#9
JOURNAL ARTICLE
Yirui Deng, Jin-Lin Yang, Zixuan Qiu, Wenhao Tang, Yanan Li, Qi Wang, Ruiping Liu
Due to their high energy density and cost-effectiveness, lithium-sulfur batteries (LSBs) are considered highly promising for the next generation of energy storage technologies. However, the soluble lithium-polysulfides (LiPSs) notorious for causing the shuttle effect and the sluggish redox kinetics have hindered their practical commercialization. To tackle these challenges, a heterostructural catalyst featuring NiS-NiCo2 O4 interfaces is developed, which serves as an interlayer for LSBs. These interfacial sites leverage the advantages of polar NiCo2 O4 and conductive NiS, enabling smooth Li+ diffusion, rapid electron transport, and effective immobilization of LiPSs...
December 31, 2023: Small Methods
https://read.qxmd.com/read/37958532/design-of-hollow-porous-p-nico-2-o-4-co-3-o-4-nanoarray-and-its-alkaline-aqueous-zinc-ion-battery-performance
#10
JOURNAL ARTICLE
Zhe Liang, Chenmeng Lv, Luyao Wang, Xiran Li, Shiwen Cheng, Yuqiu Huo
Alkaline aqueous zinc-ion batteries possess a wider potential window than those in mildly acidic systems; they can achieve high energy density and are expected to become the next generation of energy storage devices. In this paper, a hollow porous P-NiCo2 O4 @Co3 O4 nanoarray is obtained by ion etching and the calcination and phosphating of ZiF-67, which is directly grown on foam nickel substrate, as a precursor. It exhibits excellent performance as a cathode material for alkaline aqueous zinc-ion batteries...
October 25, 2023: International Journal of Molecular Sciences
https://read.qxmd.com/read/37890477/controlled-synthesis-of-transition-metal-oxide-multi-shell-structures-and-in-situ-study-of-the-energy-storage-mechanism
#11
JOURNAL ARTICLE
Ke Wang, Yan Zhou, Zhihao Hu, Yilin Tai, Lixun Cheng, Binghui Ge, Chuanqiang Wu
Multi-shell transition metal oxide hollow spheres show great potential for applications in energy storage because of their unique multilayered hollow structure with large specific surface area, short electron and charge transport paths, and structural stability. In this paper, the controlled synthesis of NiCo2O4, MnCo2O4, NiMn2O4 multi-shell layer structures was achieved by using the solvothermal method. As the anode materials for Li-ion batteries, the three multi-shell structures maintained good stability after 650 long cycles in the cyclic charge/discharge test...
October 27, 2023: Nanotechnology
https://read.qxmd.com/read/37815495/dense-nico2o4-nanoneedles-grown-on-carbon-foam-showing-excellent-electrochemical-and-microwave-absorption-properties
#12
JOURNAL ARTICLE
Sutang Wu, Yihan Zhu, Xuehua Yan, Wenjing Zhang, Mengyang Zhang, Xinpeng Huang, Jianmei Pan, Zohreh Shahnavaz, Jamile Mohammadi Moradian
Electromagnetic pollution could harm sensitive electronic equipment due to the rising use of electronic devices and communication infrastructure. The supercapacitor's electrochemical performance should be enhanced, and electromagnetic damage should be prevented. This study proposes NiCo2O4/CF composites for supercapacitors and microwave absorption. They are made by combining hydrothermal and annealing processes. Dense NiCo2O4 nanoneedles were uniformly grown on the outer layer of carbon foam (CF) as a growth skeleton, preventing the agglomeration of NiCo2O4...
October 10, 2023: Chemistry: a European Journal
https://read.qxmd.com/read/37812363/initiating-binary-metal-oxides-microcubes-electrsomagnetic-wave-absorber-toward-ultrabroad-absorption-bandwidth-through-interfacial-and-defects-modulation
#13
JOURNAL ARTICLE
Fushan Li, Nannan Wu, Hideo Kimura, Yuan Wang, Ben Bin Xu, Ding Wang, Yifan Li, Hassan Algadi, Zhanhu Guo, Wei Du, Chuanxin Hou
Cobalt nickel bimetallic oxides (NiCo2 O4 ) have received numerous attentions in terms of their controllable morphology, high temperature, corrosion resistance and strong electromagnetic wave (EMW) absorption capability. However, broadening the absorption bandwidth is still a huge challenge for NiCo2 O4 -based absorbers. Herein, the unique NiCo2 O4 @C core-shell microcubes with hollow structures were fabricated via a facile sacrificial template strategy. The concentration of oxygen vacancies and morphologies of the three-dimensional (3D) cubic hollow core-shell NiCo2 O4 @C framework were effectively optimized by adjusting the calcination temperature...
October 9, 2023: Nano-Micro Letters
https://read.qxmd.com/read/37673042/rich-grain-boundary-ni-co-se-nanowire-arrays-for-fast-charge-storage-in-alkaline-electrolyte
#14
JOURNAL ARTICLE
Li Wang, Mengqi Cui, Jianwei Ren, Hui Wang, Qianqian Fu
In this work, the one-dimensional (1D) Ni-Co-Se nanowire arrays with rich grain-boundaries were prepared through the solvothermal method and gas-phase selenizaiton. The results showed that the structure and crystallization of the Ni-Co-Se nanowire arrays could be modulated through the optimization of selenizaiton time. The optimal Ni-Co-Se electrode sample displayed an area specific capacitance of 242.6 μAh cm-2 at 30 mA cm-2 with a current retention rate of 68.34%. The assembled Ni-Co-Se/Active carbon (AC) electrode-based asymmetric supercapacitor (ASC) showed the area specific capacitances of 329...
September 6, 2023: Nanotechnology
https://read.qxmd.com/read/37622900/an-efficient-electrochemical-sensor-based-on-nico-2-o-4-nanoplates-and-ionic-liquid-for-determination-of-favipiravir-in-the-presence-of-acetaminophen
#15
JOURNAL ARTICLE
Somayeh Tajik, Fatemeh Sharifi, Behnaz Aflatoonian, Sayed Zia Mohammadi
Based on the modification of carbon paste electrode with NiCo2 O4 nanoplates and 1-hexyl-3-methylimidazolium tetrafluoroborate, a new electrochemical sensing platform for the sensing of favipiravir (a drug with potential therapeutic efficacy in treating COVID-19 patients) in the presence of acetaminophen was prepared. For determining the electrochemical behavior of favipiravir, cyclic voltammetry, differential pulse voltammetry, and chronoamperometry have been utilized. When compared to the unmodified carbon paste electrode, the results of the cyclic voltammetry showed that the proposed NiCo2 O4 nanoplates/1-hexyl-3-methylimidazolium tetrafluoroborate/carbon paste electrode had excellent catalytic activity for the oxidation of the favipiravir in phosphate buffer solution (pH = 7...
August 14, 2023: Biosensors
https://read.qxmd.com/read/37606896/nico-2-o-4-hollow-mesoporous-carbon-nanosphere-hybrids-enabling-super-hydrophobicity-thermal-insulation-and-highly-efficient-microwave-absorption
#16
JOURNAL ARTICLE
Wenjun Ma, Peng He, Yukang Zhou, Chao Xie, Yi Chen, Xiaoyun Liu, Shaoliang Lin, Peiyuan Zuo, Qixin Zhuang
The combination of 2D magnetic nanosheets and mesoporous carbon with unique interfaces shows considerable prospects for microwave absorption (MA). However, traditional assembly procedures make it impossible to accurately manage the assembly of magnetic nanosheets in carbon matrices. Herein, a reverse strategy for preparing complex magnetic nanosheet cores inside carbon-based yolk-shell structures is developed. This innovative approach focuses on controlling the initial crystallite formation sites in a hydrothermal reaction as well as the inflow and in situ growth behavior of 2D NiCo-layered double hydroxide precursors based on the capillary force induced by hollow mesoporous carbon nanospheres...
August 22, 2023: Small
https://read.qxmd.com/read/37446497/a-facile-two-step-hydrothermal-synthesis-of-co-oh-2-nico-2-o-4-nanosheet-nanocomposites-for-supercapacitor-electrodes
#17
JOURNAL ARTICLE
Hammad Mueen Arbi, L Vijayalakshmi, Yedluri Anil Kumar, Salem Alzahmi, Chandu V V Muralee Gopi, Andrivo Rusydi, Ihab M Obaidat
The composites of NiCo2 O4 with unique structures were substantially investigated as promising electrodes. In this study, the unique structured nanosheets anchored on nickel foam (Ni foam) were prepared under the hydrothermal technique of NiCo2 O4 and subsequent preparation of Co(OH)2 . The Co(OH)2 @NiCo2 O4 nanosheet composite has demonstrated higher specific capacitances owing to its excellent specific surface region, enhanced rate properties, and outstanding electrical conductivities. Moreover, the electrochemical properties were analyzed in a three-electrode configuration to study the sample material...
June 30, 2023: Nanomaterials
https://read.qxmd.com/read/37374386/microplotter-printing-of-a-miniature-flexible-supercapacitor-electrode-based-on-hierarchically-organized-nico-2-o-4-nanostructures
#18
JOURNAL ARTICLE
Tatiana L Simonenko, Nikolay P Simonenko, Philipp Yu Gorobtsov, Elizaveta P Simonenko, Nikolay T Kuznetsov
The hydrothermal synthesis of a nanosized NiCo2 O4 oxide with several levels of hierarchical self-organization was studied. Using X-ray diffraction analysis (XRD) and Fourier-transform infrared (FTIR) spectroscopy, it was determined that under the selected synthesis conditions, a nickel-cobalt carbonate hydroxide hydrate of the composition M(CO3 )0.5 (OH)·0.11H2 O (where M-Ni2+ and Co2+ ) is formed as a semi-product. The conditions of semi-product transformation into the target oxide were determined by simultaneous thermal analysis...
June 6, 2023: Materials
https://read.qxmd.com/read/37360103/rgo-decorated-n-doped-nico-2-o-4-hollow-microspheres-onto-activated-carbon-cloth-for-high-performance-non-enzymatic-electrochemical-glucose-detection
#19
JOURNAL ARTICLE
Prashant Shivaji Shewale, Kwang-Seok Yun
This paper reports the first effective fabrication of a high-performance non-enzymatic glucose sensor based on activated carbon cloth (ACC) coated with reduced graphene oxide (RGO) decorated N-doped urchin-like nickel cobaltite (NiCo2 O4 ) hollow microspheres. Hierarchically mesoporous N-doped NiCo2 O4 hollow microspheres were synthesized using a facile solvothermal method, followed by thermal treatment in a nitrogen (N2 ) atmosphere. Subsequently, they were hydrothermally decorated with RGO nanoflakes. The resulting composite was dip-coated onto ACC, and its electrochemical and glucose sensing performances were investigated using electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and chronoamperometric measurements in a three-electrode system...
June 2023: Heliyon
https://read.qxmd.com/read/37253189/impact-of-nico-2-o-4-srtio-3-p-n-heterojunctions-on-the-interface-of-photoelectrochemical-water-oxidation
#20
JOURNAL ARTICLE
Hongxia Wang, Yan Wang, Yumei Lin, Xiaochun Huang, Miguel García-Tecedor, Víctor A de la Peña O'Shea, Connor Murrill, Vlado K Lazarov, Freddy E Oropeza, Kelvin H L Zhang
Forming semiconductor heterojunctions is a promising strategy to boost the efficiency of solar-driven photoelectrochemical (PEC) water splitting by accelerating the separation and transport of photogenerated charge carriers via an interfacial electric field. However, there is limited research considering the influence of electrolytes on the band alignment of the heterojunction under PEC conditions. In this work, we use a single crystal NiCo2 O4 /SrTiO3 (NCO/STO) heterojunction with atomic-precision controlled thickness as a model photoelectrode to study the band structure modulations upon getting in contact with the electrolyte and the correlation with the PEC activity...
May 30, 2023: ACS Applied Materials & Interfaces
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