CRYSTENGCOMM
·
2025
·
IF 2.6
Guixin Zhao,Jinzhao Huang,Feng Jiao,Ke Zhang,Yu Zhang,Jiabei Xue,Xiaolong Deng
NiCoFe-based multicomponent alloy catalysts have been extensively studied as non-precious metal high-entropy alloy catalysts. They exhibit outstanding electrochemical performance in the electrolytic hydrogen production process. Here, we employ one-dimensional carbon nanotubes as a substrate to prepare a series of carbon-based high-entropy heterostructure catalysts. The NiCoFeMnLa/CNTs@Cr2O3 composite structure is obtained by forming oxides on the surface via vapour deposition, effectively increasing the number of active sites. The carbon-based transition metal nanomaterial catalyst NiCoFeMnLa/CNTs@Cr2O3 exhibited outstanding performance in the alkaline electrolytic catalysis of the oxygen evolution reaction, achieving an overpotential of merely 235 mV at a current density of 10 mA cm-2 in alkaline simulated seawater solution. Notably, the catalyst maintained relatively stable current density during 24 h electrochemical testing, indicating that the NiCoFe multicomponent alloy catalyst combined with Cr2O3 combination holds promise for enhanced stability during seawater electrolysis. Driven by these findings, this work may offer novel insights into the rational design of highly efficient electrocatalysts for green hydrogen production processes, particularly concerning carbon-based high-entropy alloy nanoparticle catalysts.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Longlong Li,Pengfei Cheng,Yinglin Wang,Bowen Fang,Chen Wang,Chao Liu,Xiaochuan He,Qinghua Liu,Bo Yan,Qi Liao,Ying Jiao,Shanfu Sun
Methamphetamine (MET) is highly addictive and poses serious social hazards, with its abuse presenting severe challenges to global health and safety. This study employed a simple solution combustion method to synthesize high specific surface area (SSA) Cr 2 O 3 nanoparticles, enabling highly selective detection of trace MET vapors in complex alcohol backgrounds. Structural analysis confirms the surface is enriched with Cr 3 + Lewis acid sites and surface-adsorbed oxygen species. This Cr 2 O 3 sensor exhibits optimal sensing performance to MET at 200 °C, demonstrating fast response/recovery, excellent repeatability, moisture resistance, and long-term stability. Pyridine-infrared spectroscopy and electron paramagnetic resonance (EPR) spectroscopy confirm the presence and Lewis acidity of Cr 3+ centers. Density functional theory (DFT) calculations further show that MET preferentially coordinates with surface Cr 3+ sites through its secondary amine group. By integrating principal component analysis (PCA) with a one-dimensional residual convolutional neural network (1D-ResNet), the Cr 2 O 3 sensor exhibited good MET discrimination capability against multiple drugs, volatile organic compounds (VOCs), and environmental interfering gases (such as NO 2 , H 2 , and CO). This study demonstrates the selective detection and identification of MET in complex backgrounds using a Cr 2 O 3 sensor, providing a novel strategy for developing portable smart drug screening sensors suitable for complex field environments.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Dongya Liu,Jinyue Wang,Yue Dong,Shaohan Xing,Xianchuang Liu,Xiuping Chen
Heterostructure engineering via the construction of Mott–Schottky (M–S) interfaces is a powerful strategy for designing advanced electrocatalysts. This study designs and synthesizes a NiO-Cr 2 O 3 M–S heterojunction for the efficient benzyl alcohol oxidation reaction (BAOR), which achieves a current density of 100 mA cm −2 at a low potential of 1.46 V (vs. RHE). Spectroscopic characterizations and theoretical calculations confirm the formation of an M–S junction, where a significant work function difference drives spontaneous electron transfer from NiO to Cr 2 O 3 , establishing a strong built-in electric field at the interface. This interfacial charge rearrangement fundamentally reshapes the electronic environment of the Ni active sites, enhancing the initial adsorption of reactants and upshifting the Ni d-band center. Such electronic modulation optimizes the binding strength of key intermediates and ultimately lowers the energy barrier for the rate-determining step (*Ph-CH 2 O→*Ph-CHO). The practical utility of the NiO-Cr 2 O 3 is demonstrated in a hybrid water electrolyzer, where it enabled substantial energy savings for H 2 production and the generation of benzoic acid. This work provides a clear validation of M–S heterojunction engineering as a powerful design principle for creating next-generation catalysts that synergize energy-efficient processes with value-added chemical synthesis.
研究领域:
电化学
·
催化
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材料科学
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纳米技术
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表面科学
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Meng Zhang,Zhengwei Xiong,Jinzhi Jia,Zhangyang Zhou,Botao Wu,Yuanyuan Ni,Xiuwen Zhou,Linhong Cao
A hollow Cr 2 O 3 /CrN nanoshell was synthesized directly in the ammonia atmosphere. X-ray diffraction analysis indicated that the crystalline phase was gradually transformed from the hexagonal Cr 2 O 3 to cubic CrN, in company with the shrinking of the lattice cells with the increase of ammonification time. Based on its more stable crystalline structure and well conductivity of the CrN relative to the Cr 2 O 3 , the electrochemical performance of Cr 2 O 3 /CrN composites was modified, including increased specific capacitance, enhanced cycle stability and improved electrical conductivity. While the ratio of oxygen to nitrogen is 81.89%, the Cr 2 O 3 /CrN composites own the highest specific capacitance of 333.2 F/g at 10 mV/s and maintain an initial capacitance of 84.7% after 5000 charge-discharge cycles, attributing to the maximum specific surface area. The variation of electrochemical properties of Cr 2 O 3 /CrN composites was systematically studied. These results provided a new route for designing transition metal oxides/transition metal nitrides composites as electrode materials for supercapacitors .
研究领域:
材料科学
·
电化学
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高影响因子
Frontiers of Environmental Science & Engineering
·
2021
·Vol. 15
·期 6
·1-12
·
IF 4.357
Meng Fanling,Xia Yunxue,Zhang Jianshuai,Qiu Dong,Chu Yaozhu,Tang Yuanyuan
Chromium slag usually contains various heavy metals, making its safe treatment difficult. Glass-ceramic sintering has been applied to resolve this issue and emerged as an effective method for metal immobilization by incorporating heavy metals into stable crystal structures. Currently, there is limited knowledge about the reaction pathways adopted by multiple heavy metals and the co-stabilization functions of the crystal structure. To study the Cu/Cr co-stabilization mechanisms during thermal treatment, a simulated system was prepared using a mixture with a molar ratio of Al 2 O 3 :Fe 2 O 3 :Cr 2 O 3 : CuO = 1:1:1:3. The samples were sintered at temperatures 600–1300°C followed by intensive analysis of phase constitutions and microstructure development. A spinel phase (CuFe x Al y Cr 2− x − y O 4 ) started to generate at 700°C and the incorporation of Cu/Cr into the spinel largely complete at 900°C, although the spinel peak intensity continued increasing slightly at temperatures above 900°C. Fe 2 O 3 /Cr 2 O 3 was more easily incorporated into the spinel at lower temperatures, while more Al 2 O 3 was gradually incorporated into the spinel at higher temperatures. Additionally, sintered sample microstructures became more condensed and smoother with increased sintering temperature. Cu / Cr leachability substantially decreased after Cu/Cr incorporation into the spinel phase at elevated temperatures. At 600°C, the leached ratios for Cu and Cr were 6.28% and 0.65%, respectively. When sintering temperature was increased to 1300°C, the leached ratios for all metal components in the system were below 0.2%. This study proposes a sustainable method for managing Cu/Cr co-exist slag at reasonable temperatures.
研究领域:
环境科学
·
材料科学
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高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
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2025
·
IF 2
Zhang Ling,Zhao Ronglin,Dong Yaqiang,Jia Xingjie,Zhang Bowei,He Aina,Li Jiawei,Shen Baogen
In the present work, the thermal stability, insulation performance, and magnetic properties of nanocrystalline soft magnetic powder cores (NSMCs) have been greatly improved, thanks to the successful creation of composite materials that combine inorganic nano-Cr 2 O 3 with organic epoxy resins. By coating the nano-Cr 2 O 3 /epoxy insulating layer on the FeSiBNbCu nanocrystalline powders, the core loss ( P cv ) of the FeSiBNbCu NSMCs is successfully decreased and the DC-bias performance is significantly enhanced. When the content of nano-Cr 2 O 3 is 0.3 wt.%, the FeSiBNbCu NSMCs demonstrate optimal comprehensive soft magnetic properties, including low P cv of 106.2 mW/cm 3 at 100 kHz/50 mT, high effective permeability ( μ e ) of 53.6 at the frequency of 1 MHz and DC-bias characteristics of 62% at a bias field of 100 Oe. As the coating layer of the NSMCs, the nano-Cr 2 O 3 /epoxy composite material has a straightforward, practical, and affordable production process. It is also more suited for industrialization and has a wide range of potential industrial applications.
研究领域:
材料科学
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磁性材料
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软磁复合材料
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纳米材料
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电气工程
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高影响因子
TRIBOLOGY INTERNATIONAL
·
2022
·
IF 5.62
Shuna Chen,Yunfeng Su,Qiuan Sun,Hengzhong Fan,Junjie Song,Litian Hu,Yongsheng Zhang
A fibrous monolithic ceramic was constructed with Al 2 O 3 fiber cells surrounded by Cr 2 O 3 phase-two kinds of brittle ceramics, to achieve an excellent combination of high strength and toughness, which is usually mutually exclusive in engineering materials . The material was demonstrated to fail in a non-brittle fracture manner and showed a typical rising R-curve behavior with the maximum crack growth toughness of 9.05 MPa m 1/2 . Meanwhile, the composite ceramic exhibited excellent tribological performance at high temperatures, with the lowest friction coefficient of 0.29 and wear rate of 1.07 × 10 −5 mm 3 /Nm at 600 °C. It was also demonstrated that the thermal stability of Cr 2 O 3 has a great influence on the wear mechanism when the temperature was above 800 °C.
研究领域:
材料科学
·
工程学
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DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-10
·
IF 16.6
Huang Jie,Kang Yuyang,Liu Jianan,Yao Tingting,Qiu Jianhang,Du Peipei,Huang Biaohong,Hu Weijin,Liang Yan,Xie Tengfeng,Chen Chunlin,Yin Li-Chang,Wang Lianzhou,Cheng Hui-Ming,Liu Gang
Bi 3 TiNbO 9 , a layered ferroelectric photocatalyst, exhibits great potential for overall water splitting through efficient intralayer separation of photogenerated carriers motivated by a depolarization field along the in-plane a -axis. However, the poor interlayer transport of carriers along the out-of-plane c -axis, caused by the significant potential barrier between layers, leads to a high probability of carrier recombination and consequently results in low photocatalytic activity. Here, we have developed an efficient photocatalyst consisting of Bi 3 TiNbO 9 nanosheets with a gradient tungsten (W) doping along the c -axis. This results in the generation of an additional electric field along the c -axis and simultaneously enhances the magnitude of depolarization field within the layers along the a -axis due to strengthened structural distortion. The combination of the built-in field along the c -axis and polarization along the a -axis can effectively facilitate the anisotropic migration of photogenerated electrons and holes to the basal {001} surface and lateral {110} surface of the nanosheets, respectively, enabling desirable spatial separation of carriers. Hence, the W-doped Bi 3 TiNbO 9 ferroelectric photocatalyst with Rh/Cr 2 O 3 cocatalyst achieves an efficient and durable overall water splitting feature, thereby providing an effective pathway for designing excellent layered ferroelectric photocatalysts.
研究领域:
材料科学
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光催化
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能源转换
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DOI
PubMed
高影响因子
RARE METALS
·
2026
·Vol. 45
·期 9
·e70551
·
IF 12.1
Long Huang,Hanhui Lei,Xiaolei Ren,Junda Tao,Terence Xiaoteng Liu,Xinyu Li,Juan Cao,Yalin Tan,Xingxing Gu,Hanyu Xu
en This link goes to a English section zh This link goes to a Chinese section Aqueous zinc batteries hold great promise for large-scale energy storage, yet their practical application is hindered by dendrite growth and interfacial side reactions on the zinc anode. Inspired by the industrially mature chromate passivation technology, this work reports an in situ construction of a chromium-rich passivation layer (Zn@Cr) on zinc metal via a liquid-solid interface reaction between zinc foil and sodium chromate solution. Systematic characterization reveals that the passivation layer is composed of crystalline Cr 2 O 3 with a dense and uniform structure. Electrochemical tests demonstrate that the optimized Zn@Cr-2 anode enables over 1400 h of stable cycling in symmetric cells (1 mA cm −2 , 1 mAh cm −2 ) and achieves an average Coulombic efficiency of 99.37% in Zn‖Cu half-cells. When coupled with a MnO 2 cathode, the Zn@Cr-2||MnO 2 full cell delivers an initial capacity of 218.8 mAh g −1 at 1 A g −1 and retains 179.1 mAh g −1 after 950 cycles, exhibiting excellent rate capability and long-term cycling stability. Further mechanistic analysis reveals that the chromium-rich layer functions both as an “interfacial shield” and a “deposition guide”: it suppresses hydrogen evolution and corrosion side reactions while inducing preferential Zn deposition along the (002) plane, thereby enabling uniform and dense zinc nucleation and growth. This study extends conventional metal surface treatment technology to the protection of battery anodes, offering a new strategy for interfacial design in high-performance aqueous zinc batteries that combines industrial feasibility with academic significance. 摘要 en This link goes to a English section zh This link goes to a Chinese section 水系锌电池在大规模储能领域具有广阔前景 , 但其实际应用受到锌负极枝晶生长和界面副反应的制约。受工业上成熟的铬酸盐钝化技术启发 , 本研究通过锌箔与铬酸钠溶液的液-固界面反应 , 在金属锌上原位构建了富铬钝化层 ( Zn@Cr ) 。系统表征结果表明 , 该钝化层由结晶态 Cr 2 O 3 组成 , 结构致密均匀。电化学测试显示 , 优化后的Zn@Cr-2负极在对称电池中 (1 mA cm −2 , 1 mAh cm −2 ) 可实现超过1400小时的稳定循环 , 在Zn‖Cu半电池中平均库仑效率达99.37%。与MnO₂正极匹配时 , Zn@Cr-2||MnO₂全电池在1 A g −1 电流密度下的初始容量为218.8 mAh g −1 , 经过950次循环后仍保持179.1 mAh g −1 , 展现出优异的倍率性能和长期循环稳定性。进一步机理分析表明 , 该富铬层既起到“界面防护盾”的作用 , 又具有“沉积导向”功能 : 一方面抑制析氢和腐蚀等副反应 , 另一方面诱导锌沿(002)晶面优先沉积 , 从而实现均匀致密的锌成核与生长。本研究将传统金属表面处理技术拓展至电池负极保护领域 , 为兼具工业可行性与学术意义的高性能水系锌电池界面设计提供了新策略。
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Jiawei Wei,Bingqiang Han,Yaowu Wei,Nan Li,Yilong Wang,Junlong Duan,Jiali Fu
In this paper, the influence of the CaO, MnO and Cr 2 O 3 on the decomposition mechanism, sintering process and properties of zircon ceramics were studied. The X-ray diffraction (XRD), microstructure, pore characteristics and densification behaviour were used to evaluate the decomposition mechanism and the properties of the zircon ceramics. The results indicated that the addition of CaO could accelerate the decomposition rate of zircon by the formation of the solid solution, which caused the appearance of the large pores to weaken the properties. Cr 2 O 3 could limit the sintering process, decomposition reaction and grain growth of zircon to degrade the performance of the zircon ceramics. The addition of MnO promoted the grains growth and had no effect on the decomposition of zircon by the formation of solid solution. Thus, the zircon ceramics with MnO rendered an optimal bulk density and an apparent porosity of 3.53 g/cm 3 and 22.5%, a high compressive strength of 212.6 MPa sintered at 1550 °C.
研究领域:
材料科学
·
陶瓷工程
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高影响因子
Matter
·
2024
·
IF 17.3
Junyang Tan,Jingwei Wang,Shengnan Li,Huiyu Nong,Shengfeng Zeng,Xiaolong Zou,Bilu Liu,Hui-Ming Cheng
Two-dimensional (2D) transition metal oxides (TMOs) have attracted much interest because of their unusual properties and high-temperature stability. However, due to isotropic bonding in all three dimensions and surface energy constraints, the direct synthesis of 2D TMOs with high crystal quality is challenging. Here, we develop a metal-lattice-heredity (MLH) strategy for synthesizing ultrathin TMO single crystals (e.g., Fe 2 O 3 ) with tunable properties on SiO 2 /Si substrates. The MLH starts with chemical vapor deposition-grown 2D transition metal dichalcogenides (TMDs), followed by unique sequential sulfur-to-oxygen substitution reactions to obtain TMOs, where metal atoms retain their original lattice arrangement and symmetry. Such a process results in growing single-crystalline TMOs coinciding with the morphology and thickness of TMD templates, as supported by in situ optical studies and atomic-resolved imaging. The method can be used to grow many 2D TMOs, including Fe 2 O 3 , V 2 O 5 , Cr 2 O 3 , Co 3 O 4 , and NiO, with band gaps ranging from the near-infrared to the near-UV.
研究领域:
材料科学
·
纳米技术
·
化学
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DOI
高影响因子
Small
·
2026
·
IF 11.8
Jianhong Zhang,Junjie Yan,Nan He,Huihua Zhang,Yang Du,Yuhao Kong,Xiangdong Yang,Shan Li,Yan Gu,Yu Liu,Tong Tong,Hongfei Wang,Huifang Ma,Yufeng Guo
Two-dimensional materials show great potential as candidates for next-generation memristors. However, research on reconfigurable memristors essential to complex in-memory computing frameworks remains underexplored. Here, to tackle this challenge, a reliable vapor-phase growth method is developed to grow ultrathin nonlayered Cr 2 O 3 nanosheets and enable their use in memristors with reconfigurable dual-mode memristive switching. The Cr 2 O 3 nanosheets were inclined-grown on a SiO 2 /Si substrate with tailored thickness from 5.9 to 40 nm and tunable lateral size from 3 to 36 µm by a molecular sieve-assisted strategy. Benefiting from the inclined growth characteristics, the nanosheets can be transferred to arbitrary substrates by simple and quick mechanical pressing without any chemical etching contamination. The constructed Ag/Cr 2 O 3 /Au memristor shows reversible modulation between volatile threshold switching and nonvolatile bipolar operation through compliance-current control. The resulting memristor also demonstrates a low threshold voltage of ∼0.35 V with good cycle-to-cycle and cross-device reproducibility in the volatile regime, together with low set/reset voltages around 1.0 V/−0.55 V and a representative ON/OFF ratio exceeding 10 6 in the nonvolatile regime. This dual-mode functionality originates from an Ag-filament-dominated mechanism assisted by intrinsic defects in Cr 2 O 3 , where limited filament growth yields volatile relaxation behavior, while robust filament bridging stabilizes nonvolatile states. These results reveal the potential of Cr 2 O 3 nanosheets as a promising platform for multifunctional memristive applications.
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高影响因子
危险品化学品经营许可证（带存储）