Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jingwen Ma,Ruiting Wang,Jinhao Liu,Ying Tian,Junbin Li
Electrocatalytic nitrate-to-ammonia reduction (NO 3 RR) offers a sustainable alternative to fossil-fuel-dependent Haber-Bosch processes. However, limited NH 3 yield and unsatisfactory faradaic efficiency hindered the development of NO 3 RR. Herein, a unique Ru/V o -NiCo 2 O 4 heterostructure is reported as an effective NO 3 RR catalyst, in which the NiCo 2 O 4 site preferentially adsorbs nitrate, while the Ru site provides active H species for the subsequent reduction process. Structural characterization reveals that enrichment of ruthenium on the surface of nickel-cobalt oxide catalysts by electrochemical deposition not only promotes the generation of abundant oxygen vacancies, but also promotes the charge redistribution and the formation of built-in electric field inside the catalysts, which improves the electrical conductivity as well as promotes the generation of a large number of active sites in the NO 3 RR and EGOR processes. Ru/V o -NiCo 2 O 4 exhibits excellent bifunctional catalytic activity for NO 3 RR and ethylene glycol oxidation reaction (EGOR). Specifically, in the electrocatalytic nitrate reduction for ammonia production, the Faraday efficiency reached up to 95.14 % with an ammonia yield of 17.20 mg h −1 cm −2 at - 0.3 V. The catalyst also performed well for the oxidation of ethylene glycol, with a voltage of only 0.469 V required to achieve a current density of 50 mA cm −2 . After continuous electrolysis for 12 h at a current density of 100 mA cm −2 , the formate Faraday efficiency reaches as high as 88 %. Moreover, utilization EGOR instead of OER to form NO 3 RR||EGOR full cell not only realize energy-saving NH 3 production, meanwhile achieving value-added formate product. For the constructed NO₃RR||EGOR full cell, its formate Faraday efficiency reaches up to 94 % after continuous electrolysis for 12 h at a current density of 100 mA cm −2 . This work provides a strategy to achieve highly efficient, energy-saving ammonia synthesis via rational design of bifunctional electrocatalysts and construction of a co-electrolysis system, which carries substantial significance for both energy and environmental sectors.
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2021
·
IF 5.742
Xiaobo Chen,Yang Zhang,Jianghao Cai,Jiangyue Zhu
Carbon cloth (CC) supported core–shell NiCo 2 O 4 @MnMoO 4 nanoarrays composite is successfully synthesized by two-step hydrothermal method, and used as binder-free counter electrode (CE) for dye-sensitized solar cells (DSSCs). In comparison with the NiCo 2 O 4 /CC, MnMoO 4 /CC, CC and Pt CEs, the NiCo 2 O 4 @MnMoO 4 /CC CE exhibits the significantly improved electrochemical performance. And the improved electrochemical performance can be attributed to the contribution from CC combination outer-sphere MnMoO 4 nanosheet and inner-sphere NiCo 2 O 4 nanowires array, which offer a large electrochemical surface area, good electrochemical activity to iodide/triiodide couple, and lower charge-transfer and series resistances. The DSSCs device assembled with core–shell composite NiCo 2 O 4 @MnMoO 4 /CC CE achieved excellent power conversion efficiency of 11.87%, which is higher than that of counter parts of NiCo 2 O 4 /CC (10.97%), MnMoO 4 /CC (11.08%), CC (4.84%) and Pt (8.55%) CEs. Also, the NiCo 2 O 4 @MnMoO 4 /CC based device remains 90.9% efficiency up to 10 days under ambient conditions. Therefore, the NiCo 2 O 4 @MnMoO 4 /CC composite with unique structure can be further developed as an efficient and cost-effective metal oxides electrocatalysts in DSSCs and other related fields.
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Li Li,Yun Feng,Yaru Qiu,Yusheng Li,Keyan Wu,Liande Zhu
Selective detection of toxic Hg 2+ is of great significance in the control of the environmental and industrial pollution because it poses serious threat to human health. Herein, we present a differential pulse anodic stripping voltammetric (DPASV) method for Hg 2+ detection by using hollow and porous three-dimensional nano-structured NiCo 2 O 4 with cage-like morphology as an electrode modifier. The NiCo 2 O 4 nanocages (NiCo 2 O 4 NCs) derived from ZIF-67 (a cobaltic zeolite imidazole framework) possess large specific surface areas that can provide a large number of adsorption sites for Hg 2+ . The NiCo 2 O 4 NCs modified glassy carbon electrode (NiCo 2 O 4 NCs/GCE) was demonstrated to be an advantageous and high-performance platform for the electrochemical detection of Hg 2+ with a wide linear range (0.1 nmol/L–3.5 µmol/L) and low detection limit (0.09 nmol/L). Additionally, the NiCo 2 O 4 NCs/GCE was proved to be highly stable, representing it was benign to environment and could be well applied to detect Hg 2+ in real water samples.
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Yan Ren,Jie Yang,Qi Liu,Ping Bai,Hengrui Qiu,Jinglong Cui,Yongqiang Zhang,Wenxiu He
Conversion-type anode materials based on transition-metal oxides have garnered considerable attention for high-energy-density lithium-ion batteries (LIBs) due to their high theoretical capacity and multiple reversible redox reactions; however, their practical application is impeded by severe volume expansion and structural pulverization during cycling. In this work, a polyvinylpyrrolidone (PVP)-assisted modulation strategy was developed to synthesize vine-like NiCo 2 O 4 @C composites, aiming to construct a highly conductive network and optimize the dispersion of metal oxide nanoparticles. The resulting anode features an ordered architecture in which MOF-derived components are firmly anchored onto carbon nanofibers under PVP guidance. The incorporation of carbon nanofibers significantly enhances electrical conductivity, while ZIF-67-derived nanostructures effectively suppress volume expansion, provide a high specific surface area, and create abundant porous channels. Benefiting from these structural merits, NiCo 2 O 4 @C delivers outstanding electrochemical performance, retaining 1528.5 mAh g −1 at 0.1 A g −1 after 100 cycles and 1400.2 mAh g −1 at 1 A g −1 after 500 cycles. This study offers an effective modification strategy for developing next-generation conversion-type anode materials with superior rate capability and long-term cycling stability. Download: Download high-res image (198KB) Download: Download full-size image Fig. 1. Schematic illustration of the synthesis process of the NiCo@C composite, showing the in situ growth of ZIF-67 on the surface of carbon nanofibers and its coordination structure
✓ 已验证
DOI
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 13
·7180-7187
·
IF 6.895
Lei Wang,Jianzhi Wang,Miao Wang,Pan Li,Jing Tong,Faquan Yu
AgO nanoparticles were successfully integrated into NiCo2O4 nanosheets for enhanced electrochemical catalysis ability and stability in the oxygen evolution reaction (OER). The chrysanthemum-like NiCo2O4/AgO composites mounted on nickel foam (NF) were synthesized by a hydrothermal–calcination method. AgO upgraded the ratio of Co3+/Co2+ and thus regulated the intrinsic activity of the species. The highly hierarchical structure of NiCo2O4/AgO composed of 0D AgO nanoparticles, 1D NiCo2O4 needles, 2D NiCo2O4 nanosheets, and 3D chrysanthemum-like bundles grown on NF bestowed the high surface area and mesoporous structure for the easy evolution of O2. The Ni atoms in NiCo2O4 originating in situ from NF in the process of AgO formation produced an integrated electrode of the active component of NiCo2O4 bound on NF with a superb highway for charge transfer. AgO significantly tuned the structure and physicochemical properties of NiCo2O4. As a result, NiCo2O4/AgO/NF exhibited excellent OER performance with an overpotential of 232 mV to obtain a current density of 10 mAcm−2 in an alkaline electrolyte, and the catalyst showed a small loss of the initial catalyst activity for 50 h and over 5000 cycles. This study provides a pathway for developing high-performance OER electrocatalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Dandan Song,Xiaoyue Xu,Xingge Huang,Guoqiang Li,Xiaotong Wang,Yisong Zhao,Faming Gao
Heteroatom doped graphdiyne (GDY) has been demonstrated to be an effective strategy for achieving outstanding electrochemical properties, including improved electrocatalytic activity , tunable electronic properties and high electronic conductivity, by producing numerous heteroatomic defects as well as active sites. Extensive efforts have been devoted to the issue of single element doping of GDY. Introducing two or more kinds of heteroatoms into GDY materials may create a synergic effect between the co-dopants, thus generating superior electrochemical performance. Nevertheless, little research on multiple elements co-doped GDY, especially in the application of constructing electrochemical biosensor . Herein, nitrogen and fluoride co-doped GDY (N–F-GDY) has been synthesized and employed to combine with NiCo 2 O 4 –Co 3 O 4 hollow multishelled nanocages to establish an ultrasensitive electrochemical biosensor for the assay of pesticide residue . The as-prepared electrochemical biosensor possesses a wide linear range of 0.448 pM–44.8 nM for monocrotophos detection and a low detection limit of 0.0166 fM (S/N = 3).
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2019
·
IF 4.959
Zhiwei Lu,Lan Wu,Junjun Zhang,Wanlin Dai,Guangquan Mo,Jianshan Ye
In this work, a simple strategy for fabricating a 3D nitrogen doped holey graphene hydrogel decorated with NiCo 2 O 4 nanoflowers (NHGH/NiCo 2 O 4 ) via a one-pot hydrothermal method with subsequent calcination is reported for the first time. The novel NHGH/NiCo 2 O 4 nanocomposites featured high electrical conductivity, large and accessible surface areas, abundant active sites, and excellent electrocatalytic performance. Considering the excellent catalytic activity of NiCo 2 O 4 , a sensitive and bifunctional electrochemical non-enzymatic biosensor was established for the determination of glucose and hydrogen peroxide (H 2 O 2 ). The obtained biosensor exhibited wide linear ranges (glucose: 0.005–10.95 mM; H 2 O 2 : 1–510 μM) and a low detection limits (glucose: 0.39 μM; H 2 O 2 : 0.136 μM) in alkaline solution (S/N = 3). Excellent electrocatalytic activity of this sensor was ascribed to the synergistic effects of the hybrid structure between the NiCo 2 O 4 nanoflowers and NHGH. Furthermore, the sensitive biosensor also exhibited high selectivity and could be applied to determine glucose in real blood samples. Taken together, the results reveal that the proposed hybrid nanocomposite could be a promising electrochemical biosensor.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Peng Liu,Qiang Ru,Zhen Wang,Bei Wang,Qing Guo,Peng Zhang,Xianhua Hou,Shichen Su,Francis Chi-Chung Ling
The 1D bundle-like NiCo 2 O 4 @TiO 2 hybrid was synthesized by a general and effective microemulsion strategy. It is found that after cycles the primitive 1D shape has been translated into broccoli-like fashion accompanied with abundant pores, enough active sites and convenient diffusion path, which endows the hybrid with high lithium storage capability and excellent cyclability. As anodes for LIBs, a reversible discharge capacity of 749.74 mA h g −1 is achieved after 800 long-term cycles at a current density of 2000 mA g −1 compared to 447.35 mAh g −1 of pure NiCo 2 O 4 . The hybrid also delivers superior rate performance such as 561.09 mAh g −1 even at a large current density of 5000 mA g −1 . Specifically, when the current density gradually returns to 2000 mA g −1 , the capacity still recovers to 696.69 mAh g −1 .
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2026
·Vol. 16
·期 12
·752
·
IF 4.8
Shusen Wang,Xiaomei Du,Yingqing Fu,Liu Yang,Naibao Huang,Tianxiang Peng
Binder-free NiMn2O4@NiCo2O4nanocomposites with NiMn2O4nanoparticle (NP) surface coverage on NiCo2O4nanosheets (NSs) are fabricated on nickel foam (NF) via a two-step microwave-assisted hydrothermal (MAH) method combined with annealing treatment, which can be used as a high-performance electrode material for supercapacitors. Specifically, a tulle-like NiCo2O4nanosheet framework is first in situ grown on NF, followed by the growth of NiMn2O4NPs on the surface of NiCo2O4NSs via a secondary MAH process. To investigate the effect of the second-step holding time (HT) of MAH on material performance, a series of experiments were carried out with an HT of 15, 30, 45, and 60 min, and the microstructures and electrochemical properties of the products were analyzed. Structural characterization results confirm the successful synthesis of well-defined NiMn2O4-NPs@NiCo2O4-NSs composites. Electrochemical tests demonstrate that the product at an HT of 30 min has the best electrochemical performance with a higher specific capacitance of 441.56 F·cm−2at 1 A·cm−2and cycling stability (75% capacitance retention after 5000 cycles at 15 A·cm−2). The superior electrochemical properties are mainly attributed to the unique porous tulle-like NS structure with the largest specific surface area of the 30 min product. This distinctive structure affords abundant electrochemical active sites, effectively prevents structural collapse during long-term cycling, and shortens the transmission and diffusion pathways of electrons and electrolyte ions. The optimized NiMn2O4@NiCo2O4electrode material presents extensive application prospects for high-performance supercapacitors.
✓ 已验证
DOI
PubMed
高影响因子
ChemElectroChem
·
2021
·Vol. 8
·期 20
·3894-3903
·
IF 4.59
Shanshan Chai,Kangze Dong,Tong Wu,Qingsheng Wu
Graphical A super-flexible carbon fiber network material is prepared by electrospinning followed by in situ carbonization. NiCo 2 O 4 nanosheets with a three-dimensional network membrane structure are then electrodeposited on it, exhibiting excellent flexibility and electrochemical performance both in supercapacitors and sodium-ion batteries. The rapid development of wearable electronics requests a higher energy-storage-device flexibility. Nevertheless, the fabrication of high-performance electrodes for achieving the goal of super-flexibility remains challenging. In this work, novel super-flexible PAN/PVP carbon nanofiber networks (PAN/PVP CNFs, PCF) are prepared by electrospinning followed by in situ carbonisation, whose micro-mesoporous structure could disperse stress during folding and super-flexible PCF/NCONS self-supporting electrodes are fabricated through the electrodeposition of NiCo 2 O 4 nanosheets (NCONS) with three-dimensional membrane structure on the PCF firmly. The obtained PCF/NCONS cannot only achieve 8000 times folding, but also show high electrochemical performance for both supercapacitors and sodium-ion batteries (SIBs). For supercapacitor, the specific capacitance of the PCF/NCONS reaches 1403.5 F/g at 1 A/g and it could maintain at 95.7 % after 2000 cycles. The PCF/NCONS electrodes are also used to fabricate an asymmetric supercapacitor device. The device exhibit high energy density (26.96 Wh/kg), high power density (3870.69 W/kg at 14.52 Wh/kg) and outstanding cycling stability (96.8 % retention after 3000 cycles). For SIBs, the PCF/NCONS electrodes show a high reversible capacity of 227.68 mAh/g after 100 cycles at a current density of 0.1 A/g. The super-flexible PCF/NCONS electrodes have a wide application prospect for flexible electronics.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xingzhao Wang,Jiabing Luo,Yongxiao Tuo,Yufeng Gu,Wanli Liu,Shutao Wang,Yan Zhou,Jun Zhang
In this work, a heterostructure oxygen evolution reaction (OER) electrocatalyst consisting of NiFe 2 O 4 nanoflakes grown on the tip of NiCo 2 O 4 nanoneedles arrays supported on nickel foam (NCO-NNs@NFO-NFs/NF) was obtained via simultaneous cation (Co 3+ by Fe 3+ ) and ligand exchange (-OH by 1,4-benzenedicarboxylic acid) and further annealing of the hydroxide/MOF precursor in air. HRTEM and Raman characterizations confirm the formation of NCO/NFO heterostructure. XPS characterization and charge density difference calculations clarify the electron transfer from Fe to Ni and Co at the NCO/NFO heterointerface. Electrochemical tests show that NCO-NNs@NFO-NFs/NF possesses excellent OER electrocatalytic activity (overpotential of 265 mV@50 mA cm −2 ) and durability (stable for 100 h@1 A cm −2 ). NCO-NNs@NFO-NFs/NF‖20 % Pt/C two-electrode system can achieve 10 mA cm −2 at 1.398 V for anion exchange membrane (AEM) water splitting in 1.0 M KOH at 85 °C, which exceeds the activity of using commercial RuO 2 as an anode at 25 °C, combined with the stability of 100 h at 10 mA cm −2 at 25 °C, demonstrating the practical application in industrial AEM process. XPS and HRTEM characterizations of NCO-NNs@NFO-NFs/NF after the OER V - t test, along with ex-situ Raman characterization, confirm that Co and Fe sites undergo surface reconstruction to form specific CoOOH/FeOOH interfaces, as to exert the synergistic effect of Co and Fe dual active sites during OER process. DOS calculations reveal that the density of state at Fermi energy level increases after the introduction of Fe, thereby improving conductivity and facilitating the activation of adsorbed oxygen species. This study shows a significant methodology for simultaneous improvement of the electrocatalytic stability and activity of spinel oxides-based heterostructures, which is critical for practical application.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 25
·11213-11221
·
IF 3.591
Yan Zhong,Ru-Quan Ren,Lei Qin,Jian-Bo Wang,Yi-Yi Peng,Qiang Li,Yong-Ming Fan
Electrochemical oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) has received increasing attention as it is an eco-friendly strategy for synthesizing a key monomer for the production of bio-based plastics. Developing efficient, low-cost and stable electrocatalysts is crucial for this electrochemical reaction. In this work, we have reported a facile process for the synthesis of hybrid nanosheet-structured NiCo2O4 on carbon fiber paper (NiCo2O4-CFP) for the efficient electrochemical conversion of HMF into FDCA. As a non-noble binary metal-based catalyst, NiCo2O4-CFP featured a nanosheet network and 3D nanosheet flower-like microspheres, showing 94.3% selectivity and 89.6% faradaic efficiency (FE) for FDCA, which outperformed its single component metal oxides NiO-CFP and Co3O4-CFP. And it also exhibited relatively high stability by maintaining over 80% FE after four successive cycles. The proposed mechanism suggested that the synergistic effect of Ni and Co elements in NiCo2O4 could facilitate HMF oxidation.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）