SENSORS AND ACTUATORS B-CHEMICAL
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2017
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IF 5.401
Shuang Wang,Shupeng Zhang,Maoxiang Liu,Haiou Song,Juanjuan Gao,Yueyue Qian
A novel MoS 2 -NiCo 2 O 4 architecture with highly sensitive determination toward glucose is constructed successfully in this work. MoS 2 nanosheets are regarded as clever connectors to connect NiCo 2 O 4 nanoplates together, which would inspire the electrocatlytic performance of NiCo 2 O 4 nanoplates acted as active sites greatly. The interesting nanostructure and composition were confirmed by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy, etc. Rational incorporation of MoS 2 as an electron collector can promote the formation of conductive chains among the NiCo 2 O 4 nanoplates, accompanying with inhibiting of NiCo 2 O 4 aggregation. The conductive path can accelerate the charge transfer significantly. The MoS 2 -NiCo 2 O 4 modified GCE exhibits enhanced electrocatalytic activity toward the oxidation of glucose, compared with NiCo 2 O 4 nanoplates. At a potential of +0.418 V, the fabricated biosensor demonstrates a wide detection range with high sensitivity (1748.58 μAmM −1 cm −2 ) and a low detection limit of 0.152 μM. It also shows anti-interference for ascorbic acid, uric acid, dopamine and chloride ion. Besides, it owns good reproducibility, repeatability and long-term stability. Excellent catalytic oxidation performance for glucose supports that MoS 2 -NiCo 2 O 4 hybrid is an outstanding and promising electrode material toward glucose biosensor.
研究领域:
材料科学
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生物传感器
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2023
·Vol. 7
·期 4
·977-985
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IF 5.6
Tingting Wen,Limin Wang,Yaqiong Gong
Design and synthesis of a highly efficient OER catalyst is the key to improve the efficiency of hydroelectrolysis for hydrogen production. In this paper, a rational approach to improve the catalytic performance of CoMoO4 nanomaterial was reported. A nanoflower structured CoMoO4 precursor was synthesized on nickel foam using a typical hydrothermal method. Then, CoMoO4/NF was etched through brief immersion in iron nitrate solution at room temperature to produce FeOOH–CoMoO4/NF. The unique 3D structure of FeOOH–CoMoO4/NF could availably promote interfacial electron transfer as well as effectively provide abundant active sites, and it exhibited excellent electrocatalytic activity. FeOOH–CoMoO4/NF requires an overpotential of 209 mV to achieve a current density of 10 mA cm−2. Meanwhile, the material FeOOH–CoMoO4/NF exhibits excellent catalytic durability of up to 24 h, which is promising for practical applications in energy conversion. Thus, this work may offer a viable strategy to assemble remarkable OER electrocatalysts.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Xiaolong Deng,Maolin Tian,Jian Cui,Hongtao Liu,Wenjie Zhang,Zhen Shang,Jiawei Wen,Guoyong Huang,Shengming Xu
The sustainable recovery and value-added utilisation of active metals, Pt and Re, from spent reforming catalysts represents a significant challenge in the context of industrial catalyst recycling.This study proposes an enhanced method for the selective separation and high-value utilisation of Pt and Re through the implementation of sodium roasting and weak base leaching processes.The integration of these two processes resulted in phase separation, whereby Re and Al were preferentially dissolved, while Pt was concentrated in the slag phase. Subsequent adsorption on an ion exchange resin exhibited excellent selectivity for Re/Al separation, with adsorption and desorption efficiencies of 99.67 % and 99.82 % for Re, respectively.The residual Pt was effectively recovered by oxidative acid leaching, with a combined recovery of 98.89 %.In view of the presence of trace Fe in the leach solution, the potential synergistic effect of Pt utilisation was further explored in this study. The prepared Pt/Fe@C-M intermetallic catalysts exhibited excellent electrocatalytic performance for HER, with an overpotential of 28 mV at 10 mA⋅cm −2 , which exceeded that of commercially available Pt/C catalysts.The improved performance is attributed to the beneficial electronic effect of iron in the catalyst structure. A cost-benefit analysis of the integrated recovery and value-added process was conducted, demonstrating significant commercial viability, with a net profit of $549.89 per kilogram of spent catalyst.
研究领域:
化学工程
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2024
·
IF 2.3
Yan Xiaoxu,Zhao Xianfeng,Shao Xinxin,Li Kangpeng,Sun Minghong,Ji Xinpeng,Lu Huidan,Liu Yongping
Platinum-group metal ruthenium (Ru) is considered an ideal substitute for platinum (Pt) in the hydrogen evolution reaction (HER) due to its excellent electrocatalytic performance and cost that is 20 times lower than Pt. Herein, we prepared Ru-doped WO 3 nanosheets array on carbon cloth (CC) using the hydrothermal method, followed by successful high-temperature nitridation to obtain Ru-WN/CC nanoarray electrocatalysts. As prepared Ru-doped WN nanosheets exhibit a highly porous structure, providing abundant active sites for HER. Electrochemical performance tests demonstrate that compared to pristine WN/CC, 7% Ru-WN/CC exhibits a reduced overpotential of 94 mV at a current density of 10 mA cm -2 , with a Tafel slope of only 51.4 mV dec -1 and an Rct of 6.08 Ω. Moreover, it maintains high catalytic activity for at least 24 hours under acidic conditions. The superior electrocatalytic activity of Ru-WN/CC is attributed to the significant acceleration of the kinetic rate of WN electrocatalysts by Ru doping, the reduction of electronic transfer resistance in WN, and the enlargement of the electrochemically active surface area of WN. This study provides an important reference for the development of novel low noble metal-doped electrocatalytic materials and has guiding significance for the application of metal nitrides in water splitting for hydrogen production. Graphical Abstract
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 Materials Chemistry A
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2020
·Vol. 8
·期 18
·8927-8933
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IF 11.301
Kai Deng,Tianlun Ren,You Xu,Songliang Liu,Zechuan Dai,Ziqiang Wang,Xiaonian Li,Liang Wang,Hongjing Wang
Engineering the composition and structure of hybrid electrocatalysts based on precious Pt and non-precious metals is of paramount importance for increasing the utilization efficiency of Pt and enhancing their electrocatalytic performance. Here we report the construction of novel crystalline PtPd @ amorphous NiB core–shell heterostructures (c-PtPd@a-NiB CSHs) with crystalline PtPd mesoporous truncated octahedral nanocages (c-PtPd MTONs) as the cores and amorphous NiB (a-NiB) nanosheets as the shells via a three-step strategy. This hybridization, between c-PtPd MTONs and a-NiB nanosheets, leads to increased catalytically active sites, a modulated surface electronic structure, and enhanced hydrophilic properties. With these properties, the as-obtained c-PtPd@a-NiB CSHs exhibit enhanced electrocatalytic activity toward the hydrogen evolution reaction (HER) in an alkaline medium, with a small required overpotential of 31 mV (@-10 mA cm−2), a low Tafel slope of 40.9 mV dec−1, and excellent long-term catalytic durability.
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
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
P. Velusamy,M. Sathiya,Yunpeng Liu,Shanhu Liu,R. Ramesh Babu,Mohamed Aly Saad Aly,E. Elangovan,Haibo Chang,Liqun Mao,Ruimin Xing
A two-step thermal poly-condensation and hydrothermal method is used to prepare noble metal-free nano-heterostructure of neodymium (Nd)-doped graphitic carbon nitride (g-C 3 N 4 ) and bismuth oxyiodide (BiOI). The synthesised Nd- doped g-C 3 N 4 /BiOI heterostructure shows high electron-hole separation. Moreover, a fast charge transport at the heterojunction is noted and further leads to low charge recombination rate. Consequently, the synthesised heterostructure overcomes the high charge recombination rate of g-C 3 N 4 . This work reports the effect of Nd- doping and the formed heterojunction on the structural, optical, electrical conductivity and photoelectrochemical (PEC) properties of the heterostructure. Moreover, introducing Nd dopant into g-C 3 N 4 enhances visible light absorption of g-C 3 N 4 . The optimal hetero-nanostructure (5.0 wt% Nd doped g-C 3 N 4 /BiOI) shows high photocurrent density (15.50 mA/cm 2 ) and hydrogen evolution rate (288 μmol h −1 cm −2 ) under visible light (λ ≥ 420 nm) illumination when compared to other wt.% of Nd doped g-C 3 N 4 and heterostructure. Additionally, the low emission features obtained from the photoluminescence studies and the heterojunction visually observed by HRTEM strongly emphasise that the formation of heterostructure leads to low recombination of charge carriers. Doping and forming heterostructure is shown to be an effective, controllable and an optimal approach to improve the PEC water splitting performance of g-C 3 N 4 .
研究领域:
材料科学
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光催化
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
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IF 13.3
Yuxin Long,Qiang Li,Zidong Zhang,Qingxi Zeng,Dong Liu,Lanling Zhao,Yao Liu,Yebing Li,Yiming Zhang,Kunqian Ji,Zhaorui Zhou,Xue Han,Jun Wang
Li-O 2 batteries could deliver ultra-high theoretical energy density compared to current Li-ion batteries counterpart. The slow cathode reaction kinetics in Li-O 2 batteries, however, limits their electrocatalytic performance. To this end, MoSe 2 and Ni 0.85 Se nanoflakes were decorated in carbon hollow nanoflowers, which were served as the cathode catalysts for Li-O 2 batteries. The hexagonal Ni 0.85 Se and MoSe 2 show good structural compatibility with the same space group, resulting in a stable heterogeneous structure. The synergistic interaction of the unsaturated atoms and the built-in electric fields on the heterogeneous structure exposes abundant catalytically active sites, accelerating ion and charge transport and imparting superior electrochemical activity, including high specific capacities and stable cycling performance. More importantly, the lattice distances of the Ni 0.85 Se (101) plane and MoSe 2 (100) plane at the heterogeneous interfaces are highly matched to that of Li 2 O 2 (100) plane, facilitating epitaxial growth of Li 2 O 2 , as well as the formation and decomposition of discharge products during the cycles. This strategy of employing nonstoichiometric compounds to build heterojunctions and improve Li-O 2 battery performance is expected to be applied to other energy storage or conversion systems.
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
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yongjin Chen,Yuanmin Zhu,Abbas Nasir,Renhong Liang,Ping Liao,Liwen Zhu,Songbai Hu,Shusheng Pan,Shanming Ke,Ren-Kui Zheng,Mao Ye
Piezocatalysis has emerged as a green and efficient technology to address widespread environmental challenges and public health concerns. However, scalable fabrication of high-performance, cost-effective piezocatalysts remains challenging. Herein, we propose a facile strategy utilizing rare-earth element doping to significantly enhance the piezocatalytic performance of BaTiO 3 ceramic powder synthesized via solid-state sintering. The Er-doped BaTiO 3 demonstrates exceptional RhB dye degradation with a rate constant of 257 × 10 −3 min −1 , representing a 4.9-fold improvement over pristine BaTiO 3 and surpassing reported lead-free perovskite piezocatalysts. Remarkably, even at ultralow piezocatalyst loading (2.5 mg 1 mol% Er-BaTiO 3 in 5 mg/L RhB), the system maintains a high reaction rate constant of 241 × 10 −3 min −1 . This performance enhancement originates from Er 3+ -induced polarization intensification, oxygen vacancy proliferation, and charge carrier density elevation. Our work establishes an effective strategy for developing high-efficiency piezocatalytic materials with promising applications in wastewater remediation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2024
·
IF 4.4
Menghui Han,Fangyuan Cheng,Kui Xie
Porous single crystals (PSCs) are a novel class of solid-phase materials with tailored porosity. The long-range ordered lattice and interconnected pore structure in three dimensions enable them to minimize energy losses and maintain heightened catalytic activity and stability in electrochemical systems. In the process of electrocatalytic water splitting, transition metal oxides Fe2O3 and Co3O4 are regarded as highly promising catalytic materials for the oxygen evolution reaction (OER). Here, we employed a lattice reconstruction strategy to grow porous single crystals of Fe2O3 and Co3O4 through solid–solid phase transformation, utilizing FeS2 and CoS2 nano-octahedron single crystals as the parent crystals. PSC Fe2O3 and Co3O4 have large specific surface areas to provide enough electrocatalytic active sites while retaining the intrinsic properties of porous single crystals. Meanwhile, we quantitatively engineered Pt clusters/metal oxide interfaces on the surfaces of PSC Fe2O3 and Co3O4 to enhance the electrocatalytic performance. The PSC Pt/Co3O4 catalyst with lower overpotential (269 mV at 10 mA cm−2) exhibits optimal electrochemical performance in the OER, with no degradation observed within 25 hours. The structural consistency of these porous single crystal oxide catalysts, coupled with the construction of active interfaces, offers advantages in enhancing electrocatalytic activity and durability.
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 ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Qiulin Li,Ke Zhang,Xiang Li,Jiaqi He,Yongbing Lou,Jinxi Chen
The creation of considerably effective electrocatalysts to reduce overpotentials is essential for speeding up the sluggish oxygen evolution reaction (OER) processes, which is imperatively required for the practical exploitation of electrochemical water-splitting. Herein, we prepared a unique composite structure, uniformly spherical Ni-MOF decorated with NiMoO 4 nanorods on Ni foam (NF), and assessed its performance toward oxygen evolution reaction. The synergistic effect between NiMoO 4 and Ni-MOF remarkably promoted the OER intrinsic activity. Moreover, introducing NiMoO 4 endowed the composite structure with enhanced electrical conductivity and exposed more active sites. The NiMoO 4 /Ni-MOF/NF electrode exhibited exceptional electrocatalytic activity in 1.0 M KOH aqueous solution, with a low overpotential of 218 mV to drive the current density of 10 mA cm −2 and a low Tafel slope (67.75 mV dec −1 ), surpassing the benchmark RuO 2 . The presented strategy opens a promising candidate for preparing novel non-precious metal OER electrocatalysts derived from MOF materials for sustainable energy applications.
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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Qing Qu,Guo-Liang Pan,Yan-Ting Lin,Chang-Wei Xu
High efficient and low-cost electrocatalysts for the oxygen evolution reaction (OER) are essential components of renewable energy technologies . However, the high onset potential and limited active sites restrict the catalytic activity of current electrocatalysts. Therefore, we are motivated by the development of cheap and efficient catalytic electrodes to promote the sluggish water-splitting systems associated with the large-scale application of clean and renewable energy technologies. Herein, a novel, simple, and efficient routine is presented by noble metal particles embedded within mesoporous metal oxide materials as high-efficiency anode catalysts for OER. Highly ordered mesoporous Co 3 O 4 was prepared by a nanocasting method using the silica KIT-6 as hard template, showing an enhanced electrochemical performance. Then, M - Co 3 O 4 (M = Pt, Pd, Au) nanomaterials were prepared by a simple but novel chemical reduction method. They show the high surface area of 112.3, 81.0 and 73.6 m 2 g −1 , which can provide more active surface area exposure leads to shorter paths of charges from electrolyte to electrode surface . Moreover, a three-dimensional highly ordered mesoporous structure can facilitate diffusion and penetration of electrolyte and oxygen, and can also keep catalyst nanoparticles in a well-dispersed condition with more active sites. Electrochemical measurements revealed that 20, 50, 25 wt% are the best weight contents for M (M = Pt, Pd, Au) in the Co 3 O 4 with highest electrochemical activity (0.410, 0.415 and 0.422 V vs. SCE) and j 0.7V reaching a maximum value. M-Co 3 O 4 (M = Pt, Pd, Au) materials exhibit superior activities and excellent long-duration stability in alkaline attributed to accelerating the formation of Co(IV) cations after being introduced M(M = Pt, Pd, Au) nanoparticles within mesoporous Co 3 O 4 . This kind of noble metal embedded within mesoporous oxide catalysts will hold a large potential as a highly promising electrocatalyst in the future.
研究领域:
材料科学
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能源技术
·
电化学
✓ 已验证
DOI
高影响因子
Materials Today Energy
·
2021
·
IF 7.311
J. Wu,N. Qin,E.Z. Lin,Z.H. Kang,D.H. Bao
Nanocrystalline Ba 1- x Sr x TiO 3 ( x = 0–0.3) powders were investigated with special interest in their piezocatalytic performance for degradation of organic pollutants. A great improvement of piezocatalytic activity was obtained for the compositions x = 0.2, in which the polarization shows a large change under external stress. Furthermore, with the increase of working environment temperature, the piezocatalytic performance of Ba 0.8 Sr 0.2 TiO 3 increases firstly and then decreases, giving the best piezocatalytic performance near its Curie temperature . For a better understanding of the piezocatalytic mechanism, the dynamics of charge carriers transfer on solid/liquid interface was discussed with respect to activation energy and overpotential of catalyst. It was suggested that the enhanced piezocatalytic activity of Ba 1- x Sr x TiO 3 comes from two aspects: (1) the overpotential provided by the piezoelectric effect decreases with the increasing Sr content, (2) the activation energy for the piezocatalytic reaction is greatly reduced at ferro-paraelectric phase transition. Combination of these two aspects gives rise to the nonlinear dependence of piezocatalytic activity on Sr content.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）