NANO
·
2026
·
IF 1.3
Keqiang Zhu,Jincheng Wang,Xinxin Tan,Zhiyong Jia,Yun Wang,Chuang Zhang
Developing efficient and cost-effective oxygen reduction reaction (ORR) catalysts is crucial for advancing clean energy technologies. In this study, the 3D polypyrrole aerogel was synthesized using methyl orange as a soft template. The subsequent in-situ spatially confined pyrolysis ensures the atomic dispersion of Co-N x active sites while effectively suppressing metal agglomeration. The optimized CoNC-150 catalyst exhibited a high surface area (298.53 m 2 /g) and well-distributed cobalt-coordinated active sites (Co-N 4 ), significantly enhancing ORR performance. Electrochemical evaluations demonstrated an exceptional half-wave potential of 0.886 V, closely approaching that of commercial 20 wt% Pt/C (0.892 V). The catalyst followed a fourelectron transfer pathway, ensuring efficient ORR kinetics. Remarkably, this robust 3D monolithic architecture endows the catalyst with exceptional stability in alkaline media. Long-term durability tests over 40,000 cycles confirmed their remarkable stability, with only a 0.008 V loss in half-wave potential, significantly lower than the 0.022 V loss in Pt/C under similar conditions. The degraded CoNC-150 exhibited a half-wave potential of 0.878 V, significantly outperforming Pt/C (0.870 V). Kinetically, CoNC-150 exhibits a Tafel slope of 146.16 mV/dec, indicating favorable ORR dynamics. These results highlight the potential of CoNC-150 as a highly active and durable non-precious metal catalyst (NPMC) for ORR applications. This study provides valuable insights into the rational design of transition metal-based electrocatalysts, offering a promising route toward scalable and sustainable energy conversion technologies.
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POLYMER ENGINEERING AND SCIENCE
·
2026
·
IF 3.6
Qianqian Qi,Fuhao Zhu,Mingyu Zhang,Qingguo Wang
Poly(lactic-co-glycolic acid) (PLGA) is a widely used biodegradable polyester; however, its inherently glassy nature limits its applicability in systems requiring large and reversible deformation. In this work, segmented PLGA-based biodegradable thermoplastic elastomers (BTPE PLGA ) were developed by incorporating highly flexible, amorphous aliphatic polyester soft segments with a low glass transition temperature (≈−55°C) through chain extension with hexamethylene diisocyanate (HDI). The resulting materials exhibit microphase-separated morphologies characterized by distinct glass transitions associated with soft- and PLGA-rich domains. By varying the PLGA/soft-segment ratio, mechanical properties can be systematically tuned, with tensile strengths ranging from approximately 5 to 15 MPa and elongations at break exceeding 900% at intermediate compositions. Cyclic tensile tests demonstrate elastic recovery above 90% under repeated loading. Dynamic mechanical analysis reveals composition-dependent modulus and a stable rubbery plateau region. Enzymatic degradation studies further show that the mass-loss behavior can be regulated through segmental composition while maintaining the thermoplastic elastomer characteristics. These results demonstrate that segmented structural design provides an effective strategy for balancing elasticity and degradation behavior in PLGA-based thermoplastic elastomers. Highlights Segmented PLGA-based thermoplastic elastomers developed. Hard/soft segment ratio governs mechanical performance. Tensile strength tunable from 5 to 15 MPa. Elongation exceeded 900% with stable elastic recovery. Degradation behavior regulated by segment composition.
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ACS Omega
·
2026
·
IF 5.2
Zai Dong,Xichang Wu,Tianhua Yu,Chaochan Li,Heng Zhang,Jie Wang,Armin Rezayan,Anping Wang
This study aims to improve the removal efficiency of heavy metal ions from wastewater. We utilized agricultural residues derived from Camellia oleifera shell and combined them with zeolitic imidazolate frameworks (ZIFs) precursors for synergistic modification. By introducing active components such as Zn and Co in situ using chemical reagents, followed by pyrolysis, co-carbonization, and KOH activation treatments, we prepared nine types of functionalized biochar (BCX-T). Their structural characteristics and adsorption performance toward Cu(II) and Cd(II) were systematically characterized. The results showed that BC8-500 exhibited an adsorption capacity of 31.61 mg/g for Cu(II), a 2.1-fold increase compared to unmodified biochar; BC9-500 exhibited an adsorption capacity of 111.43 mg/g for Cd(II), a 6.4-fold increase. The adsorption process was primarily driven by chemical adsorption and multilayer adsorption. The removal of Cu(II) by BC8-500 was mainly achieved through complexation, whereas the removal of Cd(II) by BC9-500 was primarily achieved through CdCO3 precipitation. This study provides a theoretical basis for the effective utilization of agricultural and forestry residues, as well as for the mitigation and management of environmental pollution.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Shengyuan Wang,Zhenheng Sun,Jiuzhou Wang,Xiaosha Cui,Sida Deng,Yupeng Liu,Yanji Chen,Guihua Zeng,Yanrong Wang,Zhenxing Zhang,Wei Lan,Erqing Xie,Yaxiong Zhang
Solid state conversion electrodes are promising for aqueous energy storage but are frequently constrained by sluggish interfacial kinetics, leading to a persistent energy-power trade-off and underutilized capacity at high rates. Here we propose a chemical mediation strategy in which dissolved [Fe(CN) 6 ] 4− /[Fe(CN) 6 ] 3− couples continuously regenerate an interfacial oxidant to chemically drive the α-Co(OH) 2 to CoOOH conversion, thereby rewriting the rate limiting solid state electrochemical step into an electrochemical-chemical cascade at the electrode/electrolyte interface. Electrochemical analyses and spectroscopy corroborate the spontaneous oxidative phase transformation and the mediator enabled pathway reconstruction beyond simple solid–liquid capacity superposition. To make this capacity boosting strategy practically efficient, we further tune the initial redox composition of the mediator couple to suppress shuttle driven self-discharge while maintaining fast interfacial conversion kinetics, as quantified by multi-potential-step measurement (MPSM) and visualized by in situ Raman mapping. Consequently, the redox-enhanced alkaline Zn-Co battery exhibits a remarkable areal capacity of 0.98 mAh cm −2 (a 96% enhancement), while simultaneously retaining a high energy density of 0.92 mWh cm −2 and an ultrahigh-power density of 75 mW cm −2 . This work highlights a functional electrolyte design route to unlock deep solid state conversion capacity under high-power operation in aqueous batteries.
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LANGMUIR
·
2026
·Vol. 42
·期 30
·22007-22020
·
IF 4.4
Yuan Guokai,Li Qi,Xue Yuyang,Chen Qixiang,Yu Aijia,Xie Aijuan,Luo Shiping
Metal–organic
frameworks (MOFs) have attracted
considerable
research interest as versatile templating agents for synthesizing
transition metal compounds, particularly in electrocatalytic water
splitting applications due to their tunable spatial architectures
and compositional flexibility. This study investigated the in situ
growth of sulfur–phosphorus codoped NiFe-based MOF catalysts
on nickel foam (NF) substrates (FeNi 3 –CPS/NF) and
their bifunctional activities toward hydrogen evolution reaction (HER)
and oxygen evolution reaction (OER) in 1.0 M KOH. Electrochemical
measurements demonstrate that the FeNi 3 –CPS/NF catalyst
exhibits remarkable catalytic performance with low overpotentials
of 136 mV for HER and 75 mV for OER, and low Tafel slopes of 30.97
(HER) and 8.49 mV dec –1 (OER), respectively. The
charge transfer resistance ( R ct ) values
reach 2.328 Ω during HER and 2.149 Ω during OER, highlighting
efficient electron transfer. The electrochemical active surface areas
(ECSA) were determined as 1200 cm 2 for HER and 1425 cm 2 for OER. Stability assessments reveal excellent durability
under both HER and OER conditions, with current retention rates of
86.32% and 80.71% respectively after prolonged electrolysis. These
findings collectively establish FeNi 3 –CPS/NF as
a promising bifunctional electrocatalyst combining high catalytic
activity with exceptional stability for overall water splitting applications.
The innovative integration of heteroatom doping within the MOF architecture
offers new design strategies for advanced energy conversion materials.
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Journal of CO2 Utilization
·
2025
·
IF 8.4
Yong Liu,Junhui Bai,Yubo Lan,Jiang Zhang,Sen Liu,Jian Wang,Fajun Zhao
CO₂ foam flooding is a promising enhanced oil recovery (EOR) technique for improving sweep efficiency and mitigating gas channeling in heterogeneous reservoirs and the solubility behavior of surfactants plays a critical role in determining foam formation and stability. In this study, a representative CO₂-soluble surfactant was investigated under high-pressure conditions. Solubility tests, foam performance evaluation, and interfacial tension measurements were conducted to systematically examine the effects of surfactant solubility and dissolution rate on foam volume and stability. The results showed that at 60 °C and 22 MPa, the surfactant exhibited a CO₂-phase solubility of up to 2.4 %, which decreased to approximately 1.1 % at 90 °C under the same pressure. As the pressure increased from 8 MPa to 22 MPa, the foam half-life extended from 70 min to nearly 500 min, and the foam comprehensive index increased from 1000 mL·min to over 4000 mL·min, indicating significant performance enhancement. Additionally, as the surfactant concentration increased from 0 % to 1.2 %, interfacial tension decreased substantially, and the minimum miscibility pressure (MMP) dropped from 31.4 MPa to 27.6 MPa. Further analysis revealed that the surfactant improves foam film formation and stability through a synergistic mechanism involving “dissolution–transport–precipitation–interfacial activity regulation.” These findings provide both theoretical insights and practical guidance for the design and screening of efficient surfactants in CO₂ foam flooding applications.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Yurong Ren,Xiaofang Lai,Minhao Guo,Ruiqi Wang,Jun Deng,Jikang Jian
Three layered quaternary sulfides, NaLi M S 2 ( M = Mn, Fe, Co) were synthesized by solid-state reactions. They adopt a trigonal CaAl 2 Si 2 -type structure (S.G. P -3 m 1) with Li and M randomly distributed at the tetrahedral metal site. Magnetic measurements reveal spin-glass ground states for these compounds, in contrast to the long-range antiferromagnetic order in the ternary counterpart NaFe 1.6 S 2 . As evidenced by electrical resistivity and optical measurements , all these three compounds show semiconducting nature, consistent with the results of first-principles calculations. The measured band gaps are 3.4 eV and 1.25 eV for NaLiMnS 2 and NaLiCoS 2 , respectively. Photoelectric measurements on NaLiCoS 2 demonstrate its potential application in photovoltaic devices .
研究领域:
材料科学
·
固体化学
·
凝聚态物理
·
无机化学
·
功能材料
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Journal of Materials Chemistry A
·
2026
·
IF 9.2
Haixiang Shi,Jianming Xu,Liuyun Chen,Tongming Su,Xinling Xie,Xuan Luo,Zu-Zeng Qin,Hongbing Ji
The efficiently selective hydrogenation of carbonyls in unsaturated aldehydes by nonnoble metal catalysts is still a severe challenge. Herein, an Co nanocluster catalyst anchored on vacancy-rich Ti3C2Ox (TCOs) was designed and prepared by a simple chemical reduction method for selective hydrogenation of cinnamaldehyde to cinnamyl alcohol. The Co/TCOs-H2 catalyst showed a superior catalytic activity with a TOF of 23.6 h-1, and reached a cinnamaldehyde conversion of 96.7% and a cinnamyl alcohol selectivity of 65.5% at low cobalt loading. Further, the characterizations demonstrated that Co nanoclusters were successfully anchored on TCOs, where the exist of surface oxygen vacancies (VOs) promote their vertical adsorption properties for cinnamaldehyde. Importantly, density functional theory calculation revealed that VOs enhanced selective adsorption of C=O on Co nanocluster by modifying the outside charge density of Co atoms, resulting an increase of the adsorption energy difference for conjugated double bonds and a lower energy barrier for H2 dissociation on Co nanocluster sites. This work develops a feasible strategy for constructing highly active metal nanocluster sites on two-dimensional MXenes and provides insight into the role of VOs on MXene in metal nanocluster during hydrogenation reactions.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yuyan Deng,Yulong Hao,Shuo Feng,Xiahong Lin,Zhenglin Sun,Haiqin Sun,Qiwei Zhang
Photochromic materials have attracted considerable attention owing to their promising applications in smart displays and optical information storage. However, most photochromic materials still face challenges, such as limited coloration and low photochromic efficiency, which restrict their potential applications in multicolor displays and high-quality optical storage. In this study, Co ions were selected as a coloring agent, and introduced into YNbO 4 matrix, showing high efficient photochromism and chemical coloration properties. Under 265 nm irradiation, the photochromic efficiency increases from 45.6% (x = 0) to 71.5% (x = 0.003), while the luminescence modulation ratio rises from 33.6% to 72.2%, thereby substantially improving optical storage capability. Most importantly, Co doping expands the surface color range from pale yellow (x = 0) to green (x = 0.001) or blue (x ≥ 0.003), and the photochromic coloration changes from brown (x = 0) to dark grey (x ≥ 0.001) after 265 nm irradiation, realizing multicolor chromism. Such multicolor features rely on synergistic coupling of photochromic and chemical coloration. These results highlight the great potential of the YNbO 4 :xCo system for multicolor display and optical storage, and provide valuable insights for future design of multicolor photochromic materials.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2026
·
IF 19.7
Jinbin Lin,Bo He,Xue Li,Xiaohui Wang,Baoxue Zhou,Pedro J.J. Alvarez,Mingce Long
Selective bond activation in heterogeneous oxidation catalysis remains challenging when multiple competitive pathways coexist. In aminophosphonates, oxidative transformation is typically dominated by kinetically favored C-N cleavage, generating refractory intermediates such as aminomethylphosphonic acid (AMPA). Herein, we demonstrated that selective C-P bond activation could be achieved via active-site coordination engineering. A cobalt single-atom catalyst featuring oxygen-vacancy-linked Zr sites (Co-Ov-Zr ensemble) created a dual-anchoring microenvironment that enforces bidentate adsorption of aminotris(methylenephosphonate), elongating the C-P bond and lowering its cleavage barrier. The vacancy-modified electronic structure promoted efficient peroxymonosulfate activation and Co(IV)=O generation. Consequently, the reaction coordinate was reprogrammed, reversing intrinsic selectivity from C-N to C-P cleavage. The optimized Co-Ov-ZrO 2 /PMS system achieved a five-fold enhancement in phosphate release kinetics compared to the vacancy-free analogue while suppressing AMPA formation. This work establishes adsorption-configuration control as a strategy for designing selective single-atom oxidation catalysts.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 18
·51876-51886
·
IF 5.8
Yu Weiting,Zhu Jieyun,Chen Sizhuo,Tang Juntao,Ye Jiexu,Song Shuang
The electrocatalytic reduction of CO 2 towards CO is one of the most desirable routines to reduce atmospheric CO 2 concentration and maintain a global carbon balance. In this work, a novel porous NiCu-embedded ZIF-derived N-doped carbon nanoparticle (NiCu@NCNPs) catalyst has been identified as an active, highly selective, stable, and cost-effective catalyst in CO 2 reduction. A CO selectivity as high as 100% has been achieved on NiCu@NCNPs which is the highest reported to date. The particle current density of CO on NiCu@NCNPs is around 15 mA cm –2 under the optimized potential at −0.9 V vs. RHE. The NiCu@NCNPs electrode also exhibits excellent stability during the five sequential CO 2 electroreduction experiments. The superior catalytic performance of NiCu@NCNPs in CO 2 RR can be related to its microstructure with high electrochemical surface area and low electron transfer resistance. Furthermore, a kinetic analysis has shown the formation of intermediate *COOH is the rate-determining step in CO 2 RR towards CO. According to the results of density functional theory (DFT) calculations, a low Gibbs-free energy change (∆ G ) for the rate-determining step leads to the enhanced catalytic performance of CO 2 RR on NiCu@NCNPs.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 5
·1261-1268
·
IF 2.5
Deng Hao-chen (Preston),Hao Qingzhu,Wang Yuhang
The COVID-19 pandemic that is still prevalent around the globe each day consumes massive disposable face masks and consequently lays a heavy burden on waste management. Meanwhile, the incineration of these medical wastes further escalates the already overwhelming carbon emission that leads to global warming and climate change. To offer a potential solution addressing medical waste and CO 2 emission challenges, we herein develop a synthetic protocol to upgrade face masks into Ni, N-doped graphene (Ni–N-C) sheet catalysts for selectively reducing CO 2 into CO electrochemically. The high specific surface area and the uniform dispersion of Ni active sites of the catalyst derived from a regular disposable face mask enable a near-unity CO Faradaic efficiency (FE) at the current density of 200 mA cm −2 . This study offers outside-of-the-box thinking to address environmental issues by turning medical wastes into CO 2 reduction catalysts.
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