JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Xiaoming Huang,Di Ma,Minghao Zhai,Kun Song,Haijun Niu
Transition metal selenides (TMSes) are promising electrode materials for supercapacitors but suffer from poor conductivity and structural stability, restricting their electrochemical performance. Herein, we report a synergistic complex modification and interface engineering strategy to construct porous Ni(OH)₂-Ni₀.₈₅Se heterogeneous nanosheets anchored on elastic rGO-PEDOT:PSS (RPP) foam (RPP@Ni(OH)₂-Ni₀.₈₅Se) for high-performance electrochemical electrodes. The heterogeneous interface between Ni(OH)₂ and Ni₀.₈₅Se optimizes electronic structure, accelerates charge transfer, and relieves volume expansion. Meanwhile, the hierarchically porous RPP substrate provides rapid ion diffusion pathways and robust structural support for the composite electrode. Electrochemical tests demonstrate that the assembled device delivers a high specific capacitance of 143 F g −1 at 1 A g −1 , with a retains 58.2% capacitance after 5000 cycles. It also has a relatively high power density (375.1 W kg −1 ) and energy density (44.7 Wh kg −1 ). Theoretical calculations reveal that the built-in interfacial electric field effectively reduces the redox reaction energy barrier and improves electrochemical activity of the electrode. This work clarifies the structure-activity relationship between heterogeneous interface engineering and electrochemical performance, and provides a universal strategy for designing high-stability, high-activity transition metal selenide composite electrodes.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Xiao Zhang,XuChen Guo,Xueying Zhang,Yunyi Ge,Feng Shen,Boxiong Shen
Integrating phase-change absorption with catalytic desorption offers a promising strategy for low-energy amine-based CO 2 capture; however, catalytic desorption of the CO 2 -rich phase in phase-change absorbents remains challenging because the highly enriched ionic products hinder product activation, proton transfer, and interfacial mass transport. Herein, a Ni(OH) 2 /NiOOH catalyst with an open layered nanosheet structure, abundant surface hydroxyl groups, and interlayer water was developed and applied to both our previously reported phase-change absorbent and a 30 wt% aqueous MEA system. The catalyst increased the maximum CO 2 desorption rate by 40% in the phase-change system and by 43% in the aqueous MEA system, while reducing the relative heat duty by 32.9% in the phase-change system, demonstrating efficient catalytic desorption performance and good cross-system applicability. Structural and mechanistic analyses reveal that the open nanosheet architecture shortens diffusion pathways and improves active-site accessibility, while surface hydroxyl groups and interlayer water construct a hydrogen-bond network for proton migration. Meanwhile, the Ni 2+ /Ni 3+ interface promotes interfacial electron transfer, enhances carbamate polarization, and weakens the C N bond. These effects synergistically facilitate carbamate decomposition and protonated amine deprotonation, providing new insights into catalyst design for low-energy CO 2 capture.
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ACS Sustainable Chemistry & Engineering
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2026
·Vol. 14
·期 29
·13326-13338
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IF 7.6
Xu Weixin,Wang Songze,Yang Bingcan,Wang Shuomei,Sang Wenqi,Fan Chen,Yan Feng,Tian Sicong,Wen Zongguo,Han Lujia
Converting lignocellulosic biomass to syngas represents a promising way to integrate renewable hydrogen and carbon resources into sustainable carbon-neutral energy systems. However, the conventional biomass gasification process typically relies on excessive steam input, resulting in significant energy penalties and CO 2 emissions. This study proposed a novel integrated gasification process for syngas production from straw, featuring the self-reforming of straw volatiles and utilization of process CO 2 , enabled by the cooperation of Ca(OH) 2 and Fe 2 O 3 . The contents of Ca(OH) 2 and Fe 2 O 3 were optimized to direct straw hydrogen into the volatiles and straw carbon into the solid phase during pyrolysis, thereby facilitating subsequent H 2 and CO production. The cooperation of Ca(OH) 2 and Fe 2 O 3 was manifested in two aspects: generating in situ steam for the self-reforming of volatiles into H 2 and promoting the secondary conversion of biochar and process CO 2 into CO. The optimized C0.3F0.2 reached a syngas yield of 19.3 mmol/g straw with a H 2 selectivity of 35.8% and a CO selectivity of 28.0%. 34.8% of process CO 2 was captured and utilized as CO rather than emitted. This work provides a sustainable and eco-friendly way for converting the hydrogen and carbon resources into efficient syngas production and falls in the domain of carbon-neutral energy system development.
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JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2025
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IF 8.4
Yu Qiao,Huajing Zhou,Lingxiang Zhao,Liang He,Rongrong Miao,Zilian Liu,Qingqing Guan
Chlorophenol pollutants are listed as global priority control substances due to their strong carcinogenicity and difficult biodegradability. The advanced oxidation technology based on •OH has strong oxidizability superior to other oxygen-active substances, and has become a favorable candidate for the treatment of organic pollutants in the environmental field. Among them, electrocatalytic two-electron ORR is widely used in water environment treatment as a typical electrochemical advanced oxidation (EAOP) technology. Under normal conditions, molecular oxygen (O 2 ) can be selectively reduced to hydrogen peroxide (H 2 O 2 ) by ORR two-electron reaction, and then further forms efficient hydroxyl radicals (•OH), which is used to target various refractory micropollutants.However, the electro-Fenton (EF) process faces challenges such as slow O 2 adsorption and activation, slow O−O bond cleavage, and slow ORR kinetics on the cathode due to the dissolution of metal ions. In the ORR reaction, the terminal adsorption of ∗OOH intermediates on the active site is difficult to achieve independent regulation, resulting in a slow kinetic process of directional conversion from hydrogen peroxide to hydroxyl radicals.Therefore, the removal efficiency of organic pollutants in EF process is seriously restricted by the above factors.This thesis proposes a kinetic optimization strategy based on the synergistic effect of heteronuclear bimetallic catalysts and the polarization of surface hydroxyl groups (−OH). By constructing a cobalt-iron layered double hydroxide (CoFe-LDHs) catalyst, we significantly enhance the selective generation of hydroxyl radicals along the oxygen reduction reaction (ORR) pathway, achieving efficient degradation of refractory organic pollutants such as 4-chlorophenol (4-CP). Our research reveals that CoFe-LDHs form a Fe−O−Co bridging structure through electron transfer between Fe 3+ and Co 2+ , which induces asymmetric adsorption of the O−O bond and lowers the kinetic energy barrier for O−O coupling (forming MxO−HOOH intermediates). This enables the directed conversion of •OH at low overpotentials. Therefore, the kinetic optimization strategy for catalysts based on modulating the adsorption of intermediates at active sites is not only of significant importance in current research but also provides new ideas and directions for future catalyst design and development.In particular, it shows broad application prospects in the fields of energy conversion and storage, environmental pollution control and so on.
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高影响因子
ELECTROCHIMICA ACTA
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2026
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IF 5.8
Shaojie Lei,Dezhang Ren,Jian Yang,Fan Lin,Zichen Li,Tengfei Li,Yan Jin,Zhibao Huo
RuO 2 electrodes are widely used in electrocatalytic oxidation due to their excellent conductivity. However, their excessively high catalytic activity toward the oxygen evolution reaction (OER) results in low selectivity for hydroxyl radicals (·OH), which limits their application in the treatment of recalcitrant organic pollutants. This study proposes a strategy to simultaneously enhance electrode conductivity and the oxygen evolution potential (OEP) by modulating the RuO 2 -TiO 2 solid solution structure. Through precise control of Ti doping levels and calcination temperature via a sol-gel method, the structure-performance relationships among coating microstructure, crystal structure, and electrochemical behavior were systematically analyzed. Results show that when the Ti doping ratio is Ru: Ti= 1:2.5 and calcination is performed at 600 °C, a well-crystallized RuO 2 -TiO 2 solid solution is formed. This structure significantly reducing the charge transfer resistance and increasing the OEP by approximately 100 mV. Fluorescence and quenching experiments further confirmed that under this solid solution structure, with the ·OH fluorescence intensity increased by approximately ninefold compared to the undoped electrode. The electrode demonstrated significant advantages in MB degradation, achieving >95% decolorization within 30 min, with energy consumption as low as 5.65 kWh·t -1 , and exhibited stability more than ten times greater than that of conventional RuO 2 electrodes. This study provides a new perspective for enhancing the electrocatalytic performance of RuO 2 electrodes from the standpoint of solid solution structural regulation, offering a theoretical basis and a feasible pathway for developing efficient and low-cost anode materials for electrochemical advanced oxidation processes.
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Journal of Physical Chemistry C
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2013
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IF 4.814
X. Ge,C. D. Gu,X. L. Wang,J. P. Tu
An ionothermal strategy is developed to synthesize hydrotalcite-like α-Co(OH)2 sheets. The structure and interlayer chemistry of α-Co(OH)2 are facilely manipulated, thus determining its pseudocapacitive performance. Significantly, a very large space of 11.2 Å in (003) plane induced by various intercalated species is found in the ionothermal synthesized α-Co(OH)2 obtained at 210 °C (210-α-Co(OH)2), which delivers a better pseudocapacitive performance. Annealing the synthesized α-Co(OH)2 generates mesoporous Co3O4 sheets or nanoparticles, which depends on the structure of the precursors. More defects in the α-Co(OH)2 precursor provide larger driving force during the nucleation of Co3O4 nanocrystals, thus reducing the grain size. The architecture of the 210-Co3O4 derived from 210-α-Co(OH)2 is featured as self-supporting mesoporous nanosheets composed of ∼5 nm sized grains. The fine grains and ultralarge specific surface area of ∼113.5 m2 g–1 in the 210-Co3O4 can trigger the formation of CoO intermediate during lithium ion insertion into the Co3O4. The 210-Co3O4 exhibits superior cycling performance as electrode for lithium ion battery and supercapacitor over the other Co3O4 samples due to its nanocrystallite constructed mesoporous sheet structure, which has a higher strain accommodation capability. The underlying mechanism discussed in this work provides guidance on structural design of advanced energy storage materials.
研究领域:
材料科学
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电化学
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储能
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纳米材料
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无机合成
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
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IF 8.7
Xinru Liang,Yali Liu,Changde Song,Jinliang Ning,Chuanfang Zhao,Jiawen Li,Baiyi Zu,Xincun Dou
CNF biomacromolecules were developed as green MOF modulators. • Defective nanosized MOF with enhanced fluorescence activity was successfully prepared. • ICT effect modulation enables sensitive organophosphorus pesticide detection. • Food-grade multifunctional fruit coating was constructed via cellulose self-assembly. • The work offers new insight into cellulose high-value use in food & agricultural safety. Biomass-derived polysaccharide macromolecules have emerged as sustainable, biocompatible functional materials for green agricultural and food applications, owing to their tunable surface groups, self-assembly properties and environmental friendliness. MOFs hold great sensing potential for their superior structural properties, while pure MOFs have critical flaws (severe agglomeration, low mass transfer, poor specificity/stability) in practice, limiting their broader deployment. To address this challenge, a general strategy for structural regulation of UiO-66-OH using green and sustainable carboxylated cellulose nanofibrils (CNFs, a typical linear polysaccharide biomacromolecule) as the sole biogenic modulator and nano-template was proposed. Driven by the competitive coordination and nano-templating effects of CNFs, the defective nanosized UiO-66-OH features abundant active sites and amplified fluorescence signals, modulating the intramolecular charge transfer (ICT) effect for sensitive pesticide detection. In the presence of the target analyte, a distinct fluorescence enhancement was achieved, with an LOD of 1.40 μg/kg (far below the international glyphosate MRL of 0.1 mg/kg in grains) and robust anti-interference against 17 common interferents. Additionally, leveraging the self-assembly properties of CNFs polysaccharide, a food-grade multifunctional fruit coating was fabricated via spray coating, enabling in-situ visual monitoring of pesticide residues and fruit freshness, pesticide degradation, and long-acting fruit preservation. This work offers a rational material design insight and technical support for high-value utilization of cellulose-based biomacromolecules, as well as the green governance of agricultural pesticide residues and high-efficiency fruit preservation. Download: Download high-res image (179KB) Download: Download full-size image
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Journal of Nanostructure in Chemistry
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2023
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IF 10.1
Yu Dexin,Zhang Feng,Yu Kai,Qu Fengyu
Cobalt-based Layered double hydroxides (Co-LDHs) through designing composite nanostructures and heterogenous junctions, has absorbed an increased concern for dual-function applications including electrochemical sensing and energy devices. Herein, the g-C 3 N 4 and GO are applied as two-dimensional (2D) scaffolds for one-pot synthesis of 2D α/β-Co(OH) 2 phase junction (α/β-Co(OH) 2 /g–C 3 N 4 /rGO, denoted as CCG) in dopamine sensing and oxygen evolution reaction (OER). The coexist of hetero-phase structure (α and β-Co(OH) 2 ) toward crystalline phase has been confirmed by various techniques. Dependent on hetero-phase structural and compositional characteristics of CCG, CCG has revealed excellent electrochemical performance: a ranking sensing response to dopamine with ppb-level sensitivity and wide detection range; and high electrocatalytic ability (38.02 mV dec −1 ) with more stable catalytic capacity toward oxygen evolution reaction (OER). The above considerable potentials for CCG ascribes to the synergistic effect of heterostructure, phase structure along with defect of α/β-Co(OH) 2 .
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Ruxia Song,Shihong Zhang,Yi He,Bo Liu,Hongjie Li,Zhifei Zhang,Yahui He
In this study, a novel Ni-Cu/OH-BN(h)-PA-Zn-DCD composite coatings with excellent wear resistance and corrosion resistance was developed, which may be used in the field of seawater corrosion. By the self-assembling of phytic acid, Zn 2+ and dicyandiamide to grow PA-Zn-DCD structure onto the surface of hydroxylated BN(h) nanosheets, obtained a hybrid denoted as OH-BN(h)-PA-Zn-DCD, which was doped into Ni-Cu coating by pulse electrodeposition. The results show that OH-BN(h) and OH-BN(h)-PA-Zn-DCD hybrids affect the surface morphology, roughness, microcrystals size and thickness of the composite coatings. Simultaneously, compared with NC coating and NC/HB-1.5 coating, NC/BP-1.5 coating has the highest microhardness (559.26 Hv), the lowest friction coefficient (0.172), and the best corrosion resistance (i corr is 3.551 × 10 −8 A·cm −2 , R ct is 1.098 × 10 6 Ω·cm 2 ). In addition, the EIS results of the immersed specimens showed that the NC/BP-1.5 composite coating still has good protective ability after soaking for 15 days in simulated seawater medium (R ct is 7.434 × 10 6 Ω·cm 2 ).
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CHEMOSPHERE
·
2022
·
IF 8.943
Pengfei Gan,Yichun Sun,Yunyi Li,Wen Liu,Jiangyu Ye,Meiping Tong,Jialiang Liang
In this work, the different selectivity of SO 4 •- and • OH towards municipal solid waste incineration leachates (MSWILs) was studied by a comparative study of UV/persulfate (PS) and UV/H 2 O 2 . Results showed SO 4 •- preferentially mineralized carbon atoms of higher average oxidation state, while • OH showed a two-stage mechanism of partial oxidation and mineralization successively. Electron spin resonance (ESR) analysis showed SO 4 •- had superior selectivity towards MSWILs than • OH, and Fe(II) would significantly affect the selectivity via forming Fe-MSWILs complex. As the consequence, Fe(II) showed slightly negative effect on UV/PS, but greatly enhanced the performance of UV/H 2 O 2 /Fe(II). High concentration of Cl - affected the degradation of non-fluorescent substances by UV/PS, while SO 4 2 - and NO 3 - showed no effect. In contrast, anions showed no effect on UV/H 2 O 2 . In addition, • OH preferentially attacked large molecules, but SO 4 •- showed no selectivity. This study further revealed the selectivity of SO 4 •- and • OH in the treatment of hypersaline wastewater, and provided theoretical support for the development of targeted technology .
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Wen-Juan Yan,Sheng Xu,Xian-Yao Tian,Jun-Jie Min,Shu-Cen Liu,Chi-Jie Ding,Nai-Liang Wang,Yan Hu,Qi-Xun Fan,Jiang-Shuo Li,Hong-Yan Zeng
In this paper, a functionalized layered double hydroxide (LDH-LS@Ni(OH) 2 ) flame retardant was designed and fabricated based on a multi-modifier system consisting of lignosulfonate (LS) and Ni(OH) 2 and used as a novel flame retardant for polypropylene (PP). In this multi-modifier system, LS as a compatibilizer and charring agent to improve compatibility and char yield, and Ni(OH) 2 was utilized to improve the graphitization of char residual, resulting in a PP/LDH-LS@Ni(OH) 2 composite with higher thermal stability. With the addition of LDH-LS@Ni(OH) 2 was only 15 wt%, the PP/LDH-LS@Ni(OH) 2 composite achieved a limiting oxygen index (LOI) of 30.8% and passed the UL-94 V-0 rating. At the same time, the peak heat release rate (PHRR), total heat release (THR), and total smoke production (TSP) were significantly reduced by 62.7%, 29.5%, and 46.2%, respectively. The flame retardant properties of LDH-LS@Ni(OH) 2 were mainly due to the catalytic charring effect of the transition metal elements and the physical barrier effect of the hydrotalcite. More specifically, as a highly efficient flame retardant, LDH-LS@Ni(OH) 2 has promising potential in reducing the fire hazards of PP composites.
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Advanced Energy Materials
·
2022
·Vol. 12
·期 32
·2201600
·
IF 29.698
Zhenyu Chen,Chao Hao,Bowen Yan,Qiuyan Chen,Huiyan Feng,Xiaoqing Mao,Jianmei Cen,Zhi Qun Tian,Panagiotis Tsiakaras,Pei Kang Shen
Traditional calcination usually causes sintering of Pt, which diminishes Pt exposure in proton exchange membrane fuel cell (PEMFC) electrodes. In the present work, a facile self-confined method for synthesizing highly dispersed PtCo-alloy on Co, N co-doped mesoporous carbon (PCN-MC) is developed via a dual-template strategy. Owing to the co-confined effect of Zn in the bimetallic zeolite-based imidazolate framework (ZIF) and Mg(OH) 2 template, ultra-fine 2.7 nm PtCo-alloy with 2–3 atomic-layer Pt-skin nanoparticles are obtained. By adjusting the Co/Zn feeding-ratio in the bimetallic ZIF at 8/7, the alloying degree and nanoparticle size are optimized to achieve an outstanding oxygen reduction reaction activity with a high mass activity (MA) of 0.956 A mg Pt −1 in 0.1 m HClO 4 , about 7.5-fold of that of commercial Pt/C. Furthermore, notable durability is also achieved with 81% retention of the initial MA after 30k cycles conducted between 0.6–1.0 V (versus reversible hydrogen electrode). These features are also verified by a H 2 –Air fuel cell test with an excellent combination of mass activity, power density, and durability. This strategy provides a feasible route for the large-scale synthesis of highly-dispersed PtCo-alloy catalysts.
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