JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2019
·Vol. 166
·期 8
·H351
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IF 3.12
Lihui Zhang,Jessie Khungwa,Yue Liu,Ling Li,Xiaohong Wang,Shengtian Wang
A novel electrochemical active electrode based on isopolyacid ion IMo6O245- (IMo6), Pt and graphene oxide (GO) had been fabricated, which was used as a biosensor in double signal amplification platform for simultaneous detection of ascorbic acid (AA), dopamine (DA) and uric acid (UA). Cyclic voltammetry, amperometry and differential pulse voltammetry indicated that a glass carbon electrode modified with Pt/IMo6/GO (Pt/IMo6/GO-GCE) presented higher electrochemical activity toward the oxidation of AA, DA and UA and faster response than those of a bare GCE, GO-GCE, Pt/GO-GCE and IMo6/GO-GCE. As an electrochemical sensor, the Pt/IMo6/GO-GCE showed a wide linear range of 50–4000 μM, 4–750 μM, and 75–300 μM with the limits of detection (S/N = 3) as 6.4 μM, 0.22 μM and 0.72 μM, corresponding to AA, DA and UA, respectively. In addition, the Pt/IMo6/GO-GCE provided a new option in the simultaneous determination of AA, DA and UA in human blood serum with reliable recovery.
研究领域:
分析化学
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生物传感
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Hanxiao Liao,Xiaodong Zhang,Shuwen Niu,Pengfei Tan,Kejun Chen,Yong Liu,Gongming Wang,Min Liu,Jun Pan
Transition metal-based pre-catalysts undergo drastic reconstruction to form the active catalysts during the alkaline oxygen evolution reaction (OER). However, the effect of escaped inactive ion from pre-catalysts themselves is usually ignored during reconstruction processes. Here, we investigate the effect of inactive MoO 4 2- escaped from a pre-catalyst of Fe incorporated nickel-molybdenum oxyhydroxide (NiMo-Fe) on OER performance. The results of in-situ Raman and X-ray photoelectron spectroscopy reveal that MoO 4 2- can be easily dissolved into KOH electrolyte and re-adsorbed on surface of catalyst during OER processes, which delivers a promoting effect on OER performance. The dissolution of MoO 4 2- is beneficial for increasing the reconstruction degree of NiMo-Fe to form the active phase of NiFeOOH. Theoretical calculations demonstrate that the re-adsorbed MoO 4 2- is favorable for the adsorption of the OOH* intermediate, thus boosts the OER activity. As expected, the NiMo-Fe shows a superior electrocatalytic performance for OER, outperforming the pre-catalyst without Mo species. This finding enriches the knowledge of inactive-ion effect on alkaline OER performance and offers a path for developing efficient electrocatalysts.
研究领域:
电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Xinyu Wang,Xu Yu,Xiaohai Cui,Pinyi He,Guohui Yang,Fu Qin,Jiawen Shang,Mingxing Zhang,Xiaoyue Wang,Lili Ren
The electrolysis of seawater represents a promising route for sustainable hydrogen production, yet it remains severely hindered by chloride-induced corrosion and competing side reactions at the anode. In this study, we develop a robust NiFe layered double hydroxide (LDH) anode modified with molybdate (MoO 4 2− ) via a simple ion intercalation strategy, which significantly enhances both the activity and durability of the oxygen evolution reaction (OER) in alkaline seawater. Systematic experimental and in-situ spectroscopic analyses reveal that intercalated MoO 4 2− induces electron delocalization around Ni/Fe sites, elevating their oxidation states and facilitating a lattice oxygen-mediated reaction pathway. This electronic modulation not only accelerates OER kinetics but also effectively shields active sites from chloride attack. The optimized NiFe LDH-MoO 4 2- electrode achieves outstanding performance with low overpotentials of 252, 284 and 312 mV at current densities of 100, 500 and 1000 mA cm −2 , respectively, and exhibits remarkable long-term stability for 220 h with 93 % retention. When integrated into a two-electrode seawater electrolyzer, the system requires only 1.65, 1.74 and 1.87 V to deliver 0.5, 1.0 and 2.0 A cm −2 , and operates stably over 180 h. This work offers an effective anti-corrosion engineering strategy, paving the way for industrial-scale seawater electrolysis.
研究领域:
电化学
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材料科学
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能源化学
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催化化学
·
腐蚀科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
·
2020
·
IF 1.41
Kun Lu,Zihan Zhu,Lin Peng,Hai Fu,Xinlong Wang,Enbo Wang
An unusual metal-organic framework, {H[Ag(I)L][Mo(VI)4O13]}n (1) (L=(4-((1H-1,2,4-triazol-1-yl)methyl)phenyl)methanol)), has been obtained under ionothermal conditions. According to the single-crystal X-ray diffraction analysis, 1 is a new 3-D framework based on β-[Mo8O26]4− type polymolybdate anions with two kinds of channels (A and B) along the b-axes and c-axes in the framework. The neighboring inorganic Mo8-Ag chains are linked by the organic ligands through the Ag centers resulting in 2-D layers. These adjacent 2-D layers extend into a 3-D framework through Ag1 nodes and β-[Mo8O26]4− anions, respectively, resulting in a topological symbol (64 · 82)2(64 · 82). In addition, the gas adsorption, proton conduction and luminescent properties of 1 are also discussed in detail. Moreover, the electrochemical impedance spectroscopy (EIS) measurements show a conductivity (1.9 × 10−4 S cm−1 at 65 °C and 95% relative humidity (RH)), with an activation energy of 0.41 eV for 1. The mechanism of proton conduction for 1 is proved to be the vehicular mechanism.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2025
·
IF 6.4
Boyang Wang,Yuankun Ren,Xiaohan Wei,Wei Yang,Haoming Su,Yu Liu,Jiaqi Liang,Xiyu Li
Lanthanide-doped fluorapatite (FAp:Ln3+) upconversion luminescence (UCL) probes exhibit good biocompatibility but suffer from low quantum yields under near-infrared (NIR) excitation. Here, we propose a universal MoO42− doping strategy that achieves 74-fold green UCL enhancement in FAp:Yb/Er/Mo (FYEM) under 980 nm excitation (quantum yield: 0.004% at 50 W cm−2). Remarkably, stable Ln3+/MoO42− dimers induce 4d–4f orbital hybridization, as validated by density functional theory (DFT) and X-ray photoelectron spectroscopy (XPS). This mechanism extends to self-sensitized systems: FAp:Er/Mo (FEM) achieves 156-fold UCL enhancement under 980 nm excitation, while FAp:Nd/Mo (FNM) integrates 84-fold UCL amplification with photothermal synergy (ΔT = 53.5 °C). Critically, the optimized FYEM material enables dual-mode imaging, with 808/980 nm excitation UCL and NIR-II downconversion luminescence for deep-tissue imaging, besides outstanding thermal sensitivity (SA = 1.04% K−1@323 K). This work establishes a biocompatible, multi-wavelength platform for deep-tissue diagnostics, photothermal therapy, and multimodal sensing and imaging.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2017
·
IF 6.065
Jianxian Zeng,Zhihui Dong,Zhe Zhang,Yuan Liu
A surface-grafted imprinted ceramic membrane (IIP-PVI/CM) for recognizing molybdate (Mo(VI)) anion was prepared by surface-initiated graft-polymerization. Firstly, raw alumina ceramic membrane (CM) was deposited with SiO 2 active layer by situ hydrolysis deposition method. Subsequently, γ-methacryloxy propyl trimethoxyl silane (MPS) was used as a coupling agent to introduce double bonds onto the SiO 2 layer (MPS-CM). Then, 1-vinylimidazole (VI) was employed as a functional monomer to graft-polymerization onto the MPS-CM (PVI-CM). During the graft-polymerization, the influence factors of grafting degree of PVI were investigated in detail. Under optimum conditions (monomer concentration 20 wt%, temperature 70 °C, initiator amount 1.1 wt% and reaction time 8 h), the grafting degree of 20.39 g/100 g was obtained. Further, Mo(VI) anion was used as a template to imprint in the PVI-CM by employing 1,6-dibromohexane as a cross-linking agent, and then Mo(VI) was removed, obtaining the IIP-PVI/CM with many imprinted cavities for Mo(VI). Thereafter, static adsorption and dynamic separation properties of IIP-PVI/CM for Mo(VI) were studied. Results indicate that IIP-PVI/CM shows a specific selectivity for Mo(VI) with the adsorption capacity of 0.69 mmol/100 g, and the selectivity coefficient of IIP-PVI/CM is 7.48 for molybdate to tungstate anions. During the dynamic separation, IIP-PVI/CM has also good selectivity for separation of Mo(VI) and W(VI) anions.
研究领域:
环境化学
·
材料科学
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分离科学
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高分子化学
·
无机分析化学
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Muyang Shi,Lu Wang,Dong Zhang
The suboptimal multifunctionality exhibited by structural supercapacitors (SSC) can be ascribed to a range of factors, encompassing the trade-off between electrical and mechanical performance of electrolyte, an inadequate interface contact between the electrode and electrolyte, as well as sluggish ion transport in the electrode and electrolyte. Herein, a new SSC architecture is introduced. First, the molybdate-ion-intercalated NiCo-LDH electrode is prepared by a convenient hydrothermal process. Benefiting from the unique 3D flower-like structure and MoO 4 2− doping effect, the as-prepared NiCo-LDH-MoO 4 2- -1 possesses high capacitance (1937.7 F g −1 ) and reversible charge-discharge stability. Subsequently, the PVA/PAA-cement composite is prepared by constructing a dual polymer-cement interwoven network. The rich intertwined network structure endows the composite with excellent mechanical and electrical properties, manifesting in a 189 % improvement in compressive strength and a 427 % augmentation in ionic conductivity compared to the pure cement. Meanwhile, an all-in-one SSC is assembled by an integrated polymerization-hydration synchronization strategy to improve interface contact. The resulting device presents superb energy density of 37.1 Wh kg −1 and long-life cycles. On the basis of these unique features, the device can be integrated into houses or road substrates for energy autarkic shelters and self-charging roads, which will significantly contribute to the development of new energy technologies and carbon neutrality fields.
研究领域:
材料科学
·
能源技术
·
建筑工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Zhan Zhao,Tao Shi,Jia Liang,Kelei Huang,Xiangchao Meng
Acceleration of hydrogen spillover on electrocatalysts is effective for improving the hydrogen evolution reaction. However, it is still challenging to design rational proton migration pathway. Herein, we propose an in-situ reconstruction strategy to provide MoO 4 2− -modified micro-environment, which prominently promotes the hydrogen spillover effect. The Mo species is introduced to be in situ oxidized and transformed to MoO 4 2− . Experimental and theoretical studies indicate that the generation and re-adsorption of MoO 4 2− not only suppress the interfacial electron accumulation, but also optimize the electronic structure to facilitate thermo-neutral adsorption of H*, thus forming the effective hydrogen spillover channel. Finally, the reconstructed catalyst exhibits excellent HER performance (overpotential of 183 mV at 1000 mA cm −2 in alkaline solution) and sustained high stability for 1000 h at 1000 mA cm −2 , which also shows great promising prospects for practical applications ( E W : 4.09 kW h m −3 ; η ETH : 86%@60 ℃) in anion exchange membrane alkaline water electrolyzer.
研究领域:
电化学
·
催化
·
能量转换
·
材料科学
·
纳米技术
·
可再生能源
✓ 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）