INORGANIC CHEMISTRY
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2026
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IF 4.6
Guirong Duan,Jie Jiang,Yanqing Jiao,Jiaqi Wang,Xi Zhao,Ganceng Yang,Haijing Yan,Honggang Fu
Developing low-cost, corrosion-resistant catalytic electrodes for the oxygen evolution reaction (OER) is essential for efficient and durable hydrogen production via anion exchange membrane water electrolysis (AEMWE). Herein, we report a polydopamine (PDA)-coated Fe,Cr codoped NiS2 self-supporting electrode (PDA-Fe,Cr-NiS2@NF). The nitrogen-rich functional groups of PDA establish robust M-N coordination bonds with active metal centers, thereby suppressing metal dissolution during anodic reconstruction. In parallel, the conductive PDA layer regulates interfacial electron redistribution and optimizes the hydrogen-bond network of interfacial water, lowering the OER activation energy. Its conformal protective layer further enhances catalyst stability. The optimized electrode delivers an OER overpotential of only 247 mV at 1 A cm–2. When integrated as the anode with a PtNiC cathode in an AEMWE cell, the system reaches a current density of 1 A cm–2 at only 1.737 V at 70 °C and operates stably for 1000 h, with a voltage decay rate of only 0.1 mV h–1, an electrolysis efficiency of 71.96%, and an energy consumption of 4.157 kWh Nm3– H2. This work establishes a viable coordination-protection strategy for constructing durable, high-performance OER electrodes for industrial-scale water electrolysis.
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高影响因子
ACS Sustainable Chemistry & Engineering
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2026
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IF 7.3
Ying Liang,Xianping Liao,Yingshuai Jia,Shiming Guan,Wanling Zhang,Wenbiao Zhang,Yuying Meng,Yi Tang,Qingsheng Gao
Electrooxidation offers a sustainable alternative by utilizing renewable energy to convert biomass-derived cyclohexanol (CHA) to adipic acid (AA), a key industrial chemical for nylon-66 and polyurethane production. While bimetallic Ni-based catalysts enhance the conversion, the role of secondary metals in modulating Ni active-site reconstruction during operation remains unclear, limiting performance optimization. Here, we demonstrate that Cr-doping promoted the dynamic reconstruction of Ni(OH)2 nanosheets to form NiOOH with abundant Ni3+ and oxygen vacancies (OVs), significantly boosting AA electrosynthesis. In situ characterizations reveal that Cr-doping accelerates OH– adsorption and promotes NiOOH formation, while subsequent Cr3+ leaching generates OVs, thus, resolving the long-standing dilemma between stabilizing high-valence Ni and maintaining abundant defects. The optimized catalyst achieves 78.1% AA yield and 85.4% Faradaic efficiency at 1.45 V vs RHE, outperforming undoped Ni(OH)2 and prior systems. Mechanistic studies identify surface Ni3+ and OVs-stabilized *OOH species as the keys for CHA dehydrogenation and cyclohexanone oxidation, respectively. Moreover, a membrane electrode assembly electrolyzer was designed for the efficient coproduction of AA (0.078 mmol h–1 cm–2) and H2 (42.9 mL h–1 cm–2) at a current density of 100 mA cm–2, demonstrating the scalability. This work clarifies the in situ reconstruction of bimetallic sites and provides a design strategy for the efficient electrosynthesis.
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Journal of the Australian Ceramic Society
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2026
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IF 2.6
Chen Yuan,Wang Shu,Li Xin
Heavy metal pollution is a globally environmental crisis as the demand for electronic products being steadily on the increase. In our work, a novel transition metal Sn-doping strategy has been proposed to reconstruct the valence band of CdS by s-p orbit hybridization. An easy and mild solvothermal method was employed to synthesize the Sn-doped CdS nanoparticles, in which Sn 2+ ions substitute Cd 2+ ions to occupy CdS lattice. This Sn-doping modification effectively narrows the bandgap and regulates the energy band structure of CdS. In this case, it has caused an extension of the visible light absorption range, an enhancement of photogenerated carrier separation efficiency, and an improvement of thermodynamic potential, as well as a photostability from photocorrosion. For the optimization effect of Sn doping, the 4 at% Sn-doped CdS sample has performed the highest efficiency of photocatalytic reduction Cr (VI) degradation, achieving 84.8% Cr (VI) removal within 10 min, as 1.3 times higher than that of bare CdS. This research establishes an experimental framework for the advancement of efficient and stable nano-photocatalysts, with implications for band engineering in metal dichalcogenide semiconductors.
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ANALYTICAL SCIENCES
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2026
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IF 2
Liang Jinhua,Ye Hongying,Yuan Zuhuan,Wu Zhaodi,Li Guizhen,Hao Ruizheng,Wu Xiaoqian,Cheng Shipei,Hu Yilin,Zhu Wenyuan
Hexavalent chromium (Cr(VI)), a highly toxic and carcinogenic environmental pollutant, poses severe threats to ecological balance and human health. Traditional colorimetric detection methods relying on peroxidase-like nanozymes often suffer from interference caused by reactive oxygen species (ROS) and coexisting redox-active substances, compromising their accuracy in complex water matrices. Herein, we report a novel H 2 O 2 -free colorimetric strategy for the ultrasensitive detection of Cr(VI) using atomically dispersed CuCo-NC catalysts. Unlike conventional mechanisms, the synergistic interplay between Cu and Co atoms modulates the electronic structure (d-band center), enabling Cr(VI) to act as a direct electron acceptor. This unique pathway facilitates the oxidation of TMB without generating ROS intermediates, thereby conferring exceptional resistance to common interferents such as Fe 2+ /Fe 3+ . The sensor exhibits a wide linear range (50–1000 nM) and an ultralow detection limit of 1.12 nM, surpassing many existing methods. Furthermore, the practical applicability of this probe is validated through the successful monitoring of Cr(VI) in real water samples (e.g., Guilin Lijiang River), demonstrating its robustness for on-site environmental surveillance. This work not only provides a reliable tool for early-warning monitoring of chromium pollution but also offers mechanistic insights into H 2 O 2 -free catalytic pathways. Graphical abstract Schematic illustration of the H 2 O 2 -free colorimetric sensing strategy using atomically dispersed CuCo-NC nanozymes. The synergistic Cu/Co dual sites enable Cr(VI) to act as a direct electron acceptor, bypassing the generation of reactive oxygen species (ROS) and thus eliminating interference from coexisting redox-active substances. This mechanism allows for the ultrasensitive and selective visual detection of Cr(VI) in real water environments
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高影响因子
ENVIRONMENTAL RESEARCH
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2026
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IF 8.2
Hong Wu,Zhuoqi Liu,Tianrong Xiong,Xingyan Liu,Ying Chen,Min Fu,Yue Deng,Yongcheng Feng,Yuyu Fang,Bowen Lei,Youzhou He
Traditional methods for treating Cr(VI)-containing wastewater often encounter issues such as high energy consumption, susceptibility to secondary pollution and limited treatment efficiency. In contrast, photocatalytic technology harnesses solar energy to efficiently reduce Cr(VI) to less toxic Cr(III) under mild conditions, offering advantages including operational simplicity and environmental friendliness, thereby providing a superior alternative. This study proposes a dual MOF precursor strategy to synthesise Cd-ZIF@NH 2 -MIL-68 composite materials, which undergo further sulphurisation to successfully construct a CdS/In 2 S 3 type-II heterojunction photocatalyst with a hollow structure. This material exhibits a larger specific surface area, increased exposure of active sites and abundant heterojunction interfaces. This heterojunction achieves an ultrafast, 99.26% removal of Cr(VI) within only 18 minutes under LED illumination, exhibiting outstanding stability with 88.10% activity retention after five cycles. Systematic characterization, photoelectrochemical tests and density functional theory (DFT) calculations collectively confirm that the successful band engineering in CdS/In 2 S 3 induces the formation of a type-II heterojunction, thereby significantly facilitating the efficient separation and migration of photogenerated charges. The combination of radical trapping experiments and electron paramagnetic resonance (EPR) spectroscopy identifies photogenerated electrons (e - ) and superoxide radicals (·O 2 - ) as the predominant reactive species. This work provides new insights for designing highly efficient MOFs-derived heterojunction photocatalysts for the rapid remediation of Cr(VI) pollution.
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PubMed
高影响因子
JOURNAL OF FLUORESCENCE
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2026
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IF 3.1
Zhao Tingting,Wang Yuanyuan,Chen Dechao,Zhang Ping,Hu Xue
Copper nanoclusters (Cu NCs) have promising applications in fluorescence sensors due to their excellent optical properties. However, their efficient application in point-of-care testing (POCT) remains a challenge due to the limited development of solid-state fluorescence platforms. In this study, a POCT platform for Cr(Ⅵ) was fabricated based on a Cu NCs hydrogel by assisting of a smartphone. The Cu NCs hydrogel was facilely synthesized by integrating cysteine (Cys)-Cu NCs into agarose- hydrogel via a self-assembly process. The prepared Cu NCs hydrogels display more stronger emission at 600 nm and stability. Moreover, the fluorescence of the Cu NCs hydrogel could be selectively quenched by Cr(Ⅵ) with the fluorescence color change from red to blue. With the assistance of a smartphone, a solid-state fluorescence platform could be developed based on the Cu NCs hydrogel directly for POCT of Cr(Ⅵ). The fluorescence color change was transduced into the RGB that displayed two linear relationships to Cr(VI) concentration between 1-10 and 10-1000 µM, with a detection limit of 1 µM. This platform also displayed great anti-interference ability and reproducibility, and was successfully used for quantifying Cr(Ⅵ) in real water samples. This study demonstrates the application potential of Cu NCs hydrogel in POCT.
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PubMed
高影响因子
CHEMOSPHERE
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2022
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IF 8.943
Jun Cai,Yuanhang Ren,Yi Xia,Lei Tao,Xueqian Wang,Langlang Wang,Ping Ning,Yixing Ma
A cubic SrTiO 3 (STO) composite material co-doped with Ce and Cr ions was synthesized by solvothermal method . The fully characterized samples were employed as photocatalysts for the oxidation of Hg 0 . The co-doped samples afforded excellent catalytic removal efficiency of 98.99% using UV irradiation and 89.9% using visible light irradiation for Hg 0 compared with the single-doped samples. It was found that co-doped samples had a lower electron-hole recombination rate, largest Brunauer-Emmett-Teller specific surface area , and reduced band gap. The electron spin resonance results revealed that ·O 2 − and ·OH were the main active species in the catalytic process. Moreover, the co-doped samples exhibited the best electron transfer rate and the highest photocurrent response intensity. The electron transfer between the elements in the co-doped sample enables it to achieve stable and efficient catalytic performance. In addition, even after five consecutive catalytic runs, the co-doped sample maintained high catalytic activity . This work highlights the potential of the perovskite-type STO materials in the photocatalytic oxidation of gaseous mercury.
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高影响因子
SOLID STATE SCIENCES
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2016
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IF 2.041
Long Shi,Dajiang Mei,Jingli Xu,Yuandong Wu
Three new bismuth-based compounds, Bi 2 O(XO 4 )(IO 3 ) 2 (X = S, Se, Cr) have been synthesized by hydrothermal method and characterized by single-crystal X-ray diffraction. Title compounds crystallize in the monoclinic space group P 2 1 /n (No.14) with lattice parameters: a = 7.2391(5), b = 17.9074(12), c = 7.7964(5) Å, β = 109.6521(15) °, Z = 4 for Bi 2 O(SO 4 )(IO 3 ) 2 ; a = 7.2665(4), b = 18.0115(10), c = 7.9310(5) Å, β = 109.7480(10) °, Z = 4 for Bi 2 O(SeO 4 )(IO 3 ) 2 ; and a = 7.2708(6), b = 17.9967(14), c = 7.8998(6) Å, β = 109.799(2) °, Z = 4 for Bi 2 O(CrO 4 )(IO 3 ) 2 , respectively. All compounds exhibit three-dimensional frameworks that are composed of [Bi 4 O 2 ] 8+ clusters, [IO 3 ] − and [XO 4 ] 2− (X = S, Se, Cr) groups. Bi atoms occur in two different coordination types, showing the stereochemical influence of the Bi 3+ lone electron pair. Title compounds were characterized by infrared spectra, solid state UV–vis–NIR diffuse reflectance spectroscopy and thermogravimetric analysis.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2017
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IF 9.446
Lu Jiang,Shuang Ni,Gang Liu,Xiaoxiang Xu
In this work, we have applied Cr/Nb co-doping strategy to the wide band gap semiconductor Bi 3 TiNbO 9 and have performed a detailed investigation on the structure, optical and photocatalytic properties of these modified Aurivillius compounds Bi 3 Ti 1-2x Cr x Nb 1+x O 9 (x = 0, 0.1, 0.2, 0.3). Our results suggest that Cr/Nb doping slightly expand the unit cell of Bi 3 TiNbO 9 with a doping limit around 20%. The involvement of Cr/Nb dopants in the crystal structure significantly reduces the band gap of Bi 3 TiNbO 9 by nearly 1 eV. Photocatalytic experiments and photoelectrochemical measurements confirms the critical role of Cr/Nb dopants in improving photocatalytic hydrogen production and anodic photocurrent. More than two-fold enhancement in hydrogen production has been noticed for merely 10% Cr/Nb co-doping. The highest photocatalytic activity belongs to Bi 3 Ti 0.8 Cr 0.1 Nb 1.1 O 9 (x = 0.1) for full range illumination and to Bi 3 Ti 0.6 Cr 0.2 Nb 1.2 O 9 (x = 0.2) for visible light illumination, with apparent quantum efficiency (AQE) approaching 0.52% and 0.27%, respectively. DFT calculation discloses the role of Cr in forming a new valence band inside the band gap of Bi 3 TiNbO 9 . In addition, strong anisotropic phenomenon in charge transportation of Bi 3 TiNbO 9 is also verified by DFT, as both conduction band minimum (CBM) and valence band maximum (VBM) are buried in the [BiTiNbO 7 ] 2− perovskite slabs and charges are only allowed to migrate within the slabs.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
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IF 4.175
L. Xi,Y. Wang,L. Yin,P.D. Townsend
Germanium substitution in the original ZnAl 2 O 4 :Cr 3+ infrared long persistent phosphors Zn 1+x Al 2-2x Ge x O 4 : Cr (x = 0.1, … 1) were synthesized via a high temperature solid state reaction . X-ray diffraction (XRD), afterglow decay curves, photoluminescence , and isometric thermoluminescence spectra were collected to characterize these samples. With the increase of substitution of germanium, the diffraction peaks shift to the shorter angles and the phase of Zn 2 GeO 4 appears (x ≥ 0.5) as indicated by the X-ray diffraction results. Photoluminescence shows the infrared emissions of Cr 3+ response, and consistently confirms that Cr 3+ is very sensitive to the host crystal field in this material. A spinel structure is indicated for the Cr 3+ infrared emission. However, the substitution of germanium can not only modify the host structure, but also provide defects which improve the afterglow of the materials as indicated by the thermoluminescence (TL) results. With a suitable substitution of germanium, TL peaks move to lower temperatures and become broader, which are both good factors for the room temperature afterglow phosphors. All the results indicate that non-gallate material ZnAl 2 O 4 Cr 3+ , with a suitable concentration of germanium substitution, could be an excellent infrared long afterglow phosphor.
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高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2026
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IF 7.8
Yongning Chen,Yin Wang,Xiaoxuan Guo,Jianan Li,Yijie Jiang,Wenbo Sun,Wenlong Sun,Chong Peng
The electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) is an effective method to produce high-value-added chemicals with low energy consumption. In this work, we prepared a highly efficient electrocatalyst by incorporating Cr-doped NiFe layered double hydroxide nanosheets supported on nickel foam (NiFeCr-LDH/NF). For the HMF oxidation reaction (HMFOR) in 1 M KOH electrolyte, the NiFeCr-LDH/NF catalyst achieves an exceptional current density of 100 mA cm -2 at a low potential of 1.47 V vs . reversible hydrogen electrode (RHE). Critically, it exhibits a high 2,5-furandicarboxylic acid (FDCA) yield of 93.8% and a Faradaic efficiency of 91.5%. Furthermore, in situ Fourier transform infrared spectroscopy (FTIR) studies and transient electrochemical measurements were carried out to investigate the mechanism in the HMFOR. Precisely controlled Cr doping can effectively modulate the synergistic adsorption equilibrium between HMF and hydroxyl intermediates, thereby enhancing electrocatalytic reaction efficiency via optimized interfacial charge transfer dynamics. This work illustrates heteroatom engineering as a powerful strategy for designing efficient electrocatalysts, enabling efficient biomass valorization.
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高影响因子
Journal of Materials Chemistry A
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2026
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IF 9.5
Yongshu Wang,Yujia Han,Zuwei Luo,Xiaohui Hu,Wendian Shi,Minghao Ma,Yuxiang Shen,Houfu Lv,Guoxiong Wang,Xinhe Bao
Metal exsolution in perovskite oxide has emerged as an effective way to boost CO2 electrolysis activity in solid oxide electrolysis cells (SOECs). It is crucial to precisely tailor the exsolution characteristics to optimize the catalytic functionality and boost the catalytic activity. Herein, we reveal that the Cr cations doping effectively modify the crystal defects and regulate the metal exsolution of Sr2Fe1.1Ni0.2Cr0.2Mo0.5O6-δ (SFNCM). FeNi alloy nanoparticles with an average particle size of ~10 nm and a particle density of exceeding 1500 μm-2 were exsolved on the surface of SFNCM perovskite, which increases the active sites and enhances CO2 electrolytic activity. The SFNCM based SOEC decorated with abundant FeNi alloy nanoparticles achieves a high current density of 2.57 A cm-2 at 1.6 V, superior to other Sr2Fe1.3Ni0.2Mo0.5O6-δ counterparts.The experimental and theoretical calculation results demonstrate the controllability of the exsolution via engineering of the perovskite structural feature. This work offers a new perspective on lattice doping strategy for the regulation of metal exsolution.
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