MATERIALS RESEARCH BULLETIN
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2025
·
IF 5.7
You Li,Yunshu Zhang,Zhichao Gan,Lulu Zhan,Yanan Ji,Mengxue Zhou,Yi Lin
Aqueous zinc-ion batteries (AZIBs) promise safe, green and cheap grid storage.Among the cathode candidates, α-MnO₂ is regarded as one of the most promising materials yet they are throttled by poor conductivity.In this work, a microwave-hydrothermal route is adopted to rapidly tailor the crystal orientation and micro-morphology of α-MnO₂, and the correlation between microstructure and ion-diffusion kinetics is systematically investigated. Graphene (Gr) is subsequently introduced to construct a three-dimensional conductive network, which markedly lowers charge-transfer resistance. Quantitative pseudocapacitive analysis further elucidates the underlying energy-storage mechanism. It is revealed that a properly prolonged hydrothermal duration alleviates nanorod aggregation, enlarges the specific surface area, and thus accelerates ion diffusion. Concurrently, the Gr-incorporated architecture enables rapid Zn²⁺/H⁺ transport and endows the composite with superior reaction kinetics. Consequently, a synergistic enhancement in both specific capacity and cycling stability is achieved. This work offers a feasible strategy for the rational design of high-performance Mn-based cathodes.
研究领域:
材料科学
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电化学
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储能技术
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纳米材料
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Fengping Hu,Lin Wei,Jinchang Xu,Zhenyou Wang,Fangming Jiang
Developing robust, multifunctional electrocatalysts is critical for advancing unitized regenerative fuel cells (URFCs) that couple water electrolysis and fuel-cell operation within a single device. We report a nanostructured palladium–manganese dioxide/carbon nanotube (Pd/MnO₂–CNTs) composite in which hollow MnO₂ nanoflowers are uniformly anchored to CNTs, forming a conductive, high–surface area framework that promotes homogeneous Pd dispersion. Comprehensive structural and surface analyses (SEM, TEM, XRD, XPS, and Raman) indicate strong interfacial interactions among Pd, MnO₂, and CNTs, generating abundant defect sites and mixed-oxide bonding that correlate with enhanced catalytic activity and stability. The composite exhibits multifunctional electrocatalysis toward the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR). When integrated into membrane–electrode assemblies, an optimized Pd/MnO₂–CNTs: IrO₂ (1: 9) electrode delivers a roundtrip efficiency of 51.4 ± 0.7 % at 50 mA cm −2 under ambient conditions, together with durable cycling performance. Beyond materials design, we propose a practical protocol for evaluating URFCs under realistic operating constraints, linking electrode composition, interfacial structure, and device-level metrics. This study establishes a scalable route to multifunctional Pd/MnO₂–CNTs catalysts and provides an experimentally grounded framework for benchmarking URFC performance.
研究领域:
材料科学
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电化学
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能量存储与转换
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纳米技术
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催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2018
·
IF 1.686
Bo Long,Xiangyang Zhou,Jingjing Tang,Juan Yang
Graphene encapsulated MnO nanorods , with a diameter of 60–120 nm and length of 1–1.5 μm (MnO@rGO) was synthesized. When evaluated as an anode material for LIBs, the MnO nanorods could not only better accommodate the huge volume change compared with bulk MnO during cycling, but also provide one dimensional charge transportation pathways. Meanwhile, graphene could efficiently alleviate the stress caused by volume change of MnO and improve the electrical conductivity . As a consequence, the as-obtained MnO@rGO hybrid delivers a high reversible capacity of 545 mA h g −1 at 0.5 A g −1 after 150 cycles, demonstrating its promising application in LIBs.
研究领域:
材料科学
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储能
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纳米技术
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电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Xintong Li,Zhichuan Yang,Shenglong Li,Min Gao,Yu Liu
Although remarkable progress has been achieved in electrocatalytic water splitting, the design of highly efficient bifunctional catalysts remains a significant challenge, mainly because of the slow kinetics of the oxygen evolution reaction (OER) and the limited stability of non-precious metal catalysts. This work presents a novel heterojunction catalyst consisting of Co–MnO nanocubes anchored on nitrogen-doped graphitic carbon derived from carbonized Ganoderma lucidum mycelium (CGLM), synthesized via an ion-exchange-coupled pyrolysis strategy. The unique fibrous entanglement morphology of CGLM offers ideal anchoring sites for catalytic centers, while preserving its intrinsic three-dimensional porous architecture to establish a continuous conductive network. This structural enhances electron transport efficiency and promotes stable immobilization of Co–MnO nanocubes (Co–MnO -2 /CGLM). Extensive experimental and theoretical investigations demonstrate that the Co–MnO -2 heterogeneous interface induces charge redistribution, synergistically optimizes the hydrogen adsorption free energy (Δ G H = −0.15 eV), and reduces the OER energy barrier, with a rate-determining step of Δ G 4 = 1.69 eV. The catalyst demonstrates remarkable bifunctional activity in alkaline media, exhibiting overpotentials of 105 mV for hydrogen evolution reaction (HER) at 10 mA cm −2 and 250 mV for OER at 50 mA cm −2 . Notably, the assembled electrolytic cell (Co–MnO -2 /CGLM||Co–MnO -2 /CGLM) achieves a voltage of only 1.61 V (50 mA cm −2 ) in overall water-splitting tests and maintains excellent durability, with negligible change in current density during prolonged operation. This study highlights the synergistic effect of heterogeneous structure engineering combined with biomass-derived carbon substrates in reducing reaction barriers and facilitating charge transfer, offering novel perspectives on the design of cost-effective electrocatalysts for sustainable energy conversion.
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产品关联
DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2020
·Vol. 51
·期 4
·1339-1343
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IF 2.035
Ren Guoxing,Xiao Songwen,Liao Caibin,Xia Longgong,Liu Zhihong
The activity coefficient of CoO in SiO 2 -saturated MnO-SiO 2 slag was measured using metal-slag-gas equilibrium experiments under controlled oxygen potentials (10 −12 to 10 −10 atm) at 1623 K. The solubility of CoO in the slag increased with increasing oxygen potential and cobalt content in the alloy. The activity coefficient of cobalt oxide, γ CoO , referred to solid CoO, can be described as: γ CoO = 1.65 − 0.14 (wt pct CoO), where (wt pct CoO) represents the mass percent of CoO in the slag.
研究领域:
冶金学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
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2022
·
IF 11.322
Yue Liu,Zhihui Zeng,Sinan Zheng,Jing Qiao,Wei Liu,Lili Wu,Jiurong Liu
A type of nickel/manganese oxide (Ni/MnO)/carbon nanocomposite fibers were prepared via a facile and scalable electrospinning and carbonization approach. In comparison to the pure carbon showing a severe agglomeration, the uniformly embedded MnO and Ni nanoparticles promoted the formation of the fibrous carbon-based nanocomposites with an average diameter of 250 nm and a rough surface. The synergistic coactions of the MnO nanoparticles acting as impedance modulating mediator, the magnetic Ni nanoparticles, and the conductive, fibrous carbon with large aspect ratio and rough surface contributed to the excellent electromagnetic wave (EMW) absorbing performance of the nanocomposites. The nanocomposites with a MnO/Ni ratio of 1:1 exhibited an effective absorption bandwidth of 6.5 GHz at a thickness of 2.9 mm and a minimum reflection loss of −53.23 dB at a thickness of 2.3 mm. The EMW absorption mechanisms of the nanocomposite fibers were discussed at length, which showed the importance of the multi-component building units and microstructure for achieving high EMW absorbing performance. This work thus suggested a convenient, facile, and scalable manufacturing approach for constructing high-performance multi-component nanocomposite fiber based 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
Journal of Water Process Engineering
·
2025
·
IF 6.7
Yongzhi Tu,Ziming Zhang,Peien Huang,Jiale Zou,Zhi Xiong,Meiting Zheng,Zhifei Ma,Jianxin Chen
Unlike conventional Fe₃O₄-MnO₂ composites, an architecture-engineered Fe₃O₄-MnO₂ (FM-21) heterostructure was constructed by anchoring Fe₃O₄ nanoparticles onto α-MnO₂ nanorods. Under visible light irradiation, the FM-21/PDS system achieves 96.5 % Orange II degradation within 60 min with a kinetic rate constant of 0.0596 min −1 , significantly outperforming its individual components and dark condition controls. Multiple characterization techniques confirm that the unique interfacial configuration establishes a direct Z-scheme charge transfer pathway, substantially enhancing charge carrier separation efficiency. XPS analysis provides direct evidence that visible light accelerates the co-cycling of Fe 3+ /Fe 2+ and Mn 4+ /Mn 3+ redox pairs, thereby maintaining highly efficient PDS activation. Quenching experiments and EPR analysis further reveal that the synergistic effect between radical and non-radical pathways, which is dominated by singlet oxygen ( 1 O₂) and holes (h + ), drives the degradation process. This mechanism enables the degradation of various pollutants with minimal dependence on their charge characteristics, demonstrating the catalyst's broad applicability. The catalyst also exhibits practical advantages including magnetic separability and stable performance over five consecutive cycles. This study demonstrates that the synthesized FM-21 exhibits significant potential for visible light-enhanced PDS activation in eliminating recalcitrant organic pollutants.
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Shurui Xu,Jiaer Li,Bingyu Zhu,Xin Tang,Yujian Li,Linjia Wang,Wenbo Liao,Xiaobo Fu,Hang Chen,Junling Tu,Kailai Zhang,Baizeng Fang,Guoyu Zhong
Investigating renewable, eco-friendly, carbon-based materials with superior electrochemical performance is pivotal for advancing the practical implementation of supercapacitors, yet it presents challenges. In this study, a novel MnO@C-HMT-T composite, consisting of porous carbon-encapsulated MnO, was synthesized from a Mn-hexamine coordinated precursor via an in-situ pyrolysis approach. Among the different materials prepared, the MnO@C-HMT-800 stood out. It displayed a mesoporous architecture with a high specific surface area of 1353.1 m 2 g −1 , which facilitates ion transport and energy storage. Additionally, the MnO encapsulated in the carbon layer enables the generation of pesudocapacitance via the redox reaction of Mn 2+ and Mn 3+ . The interaction between the double-layer capacitance of the porous carbon and the pseudocapacitance of the manganese oxides endows the MnO@C-HMT-T composite with superior electrochemical performance. Consequently, the MnO@C-HMT-800 electrode exhibits an impressive specific capacitance of 575.2 F/g at a current density of 1 A/g, demonstrating exceptional stability at 95.6 % after 10,000 cycles. This surpasses the performance of most reported Mn-based materials in the literature. This work presents an innovative and straightforward process for fabricating carbon-encapsulated transition oxides that could be highly valuable in energy storage systems.
研究领域:
材料科学
·
电化学
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能源存储
·
纳米材料
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功能材料
·
电化学能量储存
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 6
·期 4
·491-502
·
IF 6.482
Maiyong Zhu,Chengyu Tu,Xuan Li,Qiao Luo,Songjun Li
Searching electrodes with high specific capacitance, rate capability, long cycling life and economic efficiency is central for next-generation supercapacitors. In this work, a hybrid electrode consisting of MnO and N-doped carbon (MnO–NC) was constructed using KMnO4 and carboxymethyl chitosan as manganese sources and carbon sources respectively. The effect of the ratio of KMnO4 to carboxymethyl chitosan on the structure and electrochemical performance of MnO–NC was investigated in detail. At the optimized condition, a high specific capacitance of 326.36 F g−1 was obtained with satisfied cyclic stability. Moreover, an asymmetric supercapacitor (ASC) device (MnO–NC//AC), consisting of MnO–NC as the positive electrode and activated carbon (AC) as the negative electrode was assemble, which exhibited a specific energy density was 9.35 W h kg−1 at a power density of 374.83 W kg−1. Owing to the long activation process, the capacitance of the ASC device remains 172% after 10 000 cycles. These results indicate that the prepared MnO–NC has great prospects for the application of high-performance supercapacitors.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2015
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IF 4.152
Haitao Huang,Tao Yue,Ke Xu,Jafar Golzarian,Jiahui Yu,Jin Huang
Gd(III) chelate is currently used as positive magnetic resonance imaging (MRI) contrast agent in clinical diagnosis, but generally induces the risk of nephrogenic systemic fibrosis (NSF) due to the dissociated Gd 3+ from Gd(III) chelates. To develop a novel positive MRI contrast agent with low toxicity and high sensitivity, ultrasmall MnO nanoparticles were PEGylated via catechol-Mn chelation and conjugated with cRGD as active targeting function to tumor. Particularly, the MnO nanoparticles with a size of ca. 5 nm were modified by α,β-poly(aspartic acid)-based graft polymer containing PEG and DOPA moieties and, meanwhile, conjugated with cRGD to produce the contrast agent with a size of ca. 100 nm and a longitudinal relaxivity ( r 1 ) of 10.2 mM −1 S −1 . Such nanoscaled contrast agent integrated passive- and active-targeting function to tumor, and its efficient accumulation behavior in tumor was verified by in vivo distribution study. At the same time, the PEG moiety played a role of hydrophilic coating to improve the biocompatibility and stability under storing and physiological conditions, and especially might guarantee enough circulation time in blood. Moreover, in vivo MRI revealed a good and long-term effect of enhancing MRI signal for as-fabricated contrast agent while cell viability assay proved its acceptable cytotoxicity for MRI application. On the whole, the as-fabricated PEGylated and cRGD-functionalized contrast agent based on ultrasmall MnO nanoparticles showed a great potential to the T 1 -weighted MRI diagnosis of tumor.
研究领域:
生物医学工程
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影像医学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Qianxu Ye,Juanjian Ru,Jinhui Peng,Guo Chen,Ding Wang
Herein, the multiporous MnO/N-doped carbon (MnO/NC) composite based on the abundant and inexpensive electrolytic manganese dioxide were fabricated through a facile microwave-assisted carbonthermal reduction, combined with a subsequent in-situ polymerization of polydopamine onto MnO along with thermal treatment. As an anode material, it retains a reversible capacity of 770.5 mAh g −1 at 300 mA g −1 and high Coulombic efficiency of 99% over 500 cycles, superior than those values of the pure multiporous MnO alone. The impressive performance is attributed to the splendid structure stability contributed by well-connected three-dimensional porous configuration and the enhanced reaction kinetics as well as electrical conductivity incurred by N-doped carbon layer with multiple type nitrogen.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Peilin Zhang,Jinzhe Liu,Chencheng Zhou,Shouzhi Guo,Shuo Li,Yun Yang,Jing Wu,Di Yu,Hanfei Chen,Ming Zhao,Luyang Chen
Manganese monoxide (MnO) has emerged as a promising anode material in lithium-ion batteries (LIBs) due to its large lithiation capacity, low voltage hysteresis and environmental friendliness. In this work, we have developed the nitrogen-doped carbon coated MnO porous microspheres (MnO@NC), which consist of small nanocrystals with interparticle mesopores via a self-templated solvothermal synthesis and subsequent in-situ pyrolysis of polypyrrole precursors. By virtue of the conductive outer layer of nitrogen-doped carbon (NC) and the abundant inner mesopores, the hierarchical MnO@NC porous microspheres manifest the superior lithium storage properties as anode for LIBs. In detail, the optimized MnO@NC electrode delivers a high initial discharge capacity of 1037 mAh g − 1 at 0.2 A g − 1 , remains the discharge capacity of 890 mAh g −1 at 1A g − 1 after 500 cycles, indicates the outstanding rate capability with a specific capacity of 450 mAh g − 1 at 5A g − 1 .
研究领域:
材料科学
·
储能
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）