Journal of Cleaner Production
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2024
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IF 9.7
Yunlong Zhu,Hongyuan Xi,Song Zhou,Majed Shreka,Yifeng Wu,Jinquan Lin,Wenming Yang
High desorption energy consumption and low cyclic loading are critical issues limiting the application of onboard carbon capture (OCC) systems. In this study, a tetraethylenepentamine (TEPA) and 2–amino–2–methyl–1–propanol (AMP) mixed amine solvent with low desorption energy consumption and high CO 2 cyclic loading, suitable for the operational environment of OCC systems, has been proposed. Detailed research was conducted on the capture performance and mechanism of the TEPA + AMP mixed amine solvent. The 0.25M TEPA+0.75M AMP mixed amine solvent exhibited the best performance, with an 86.5% increase in CO 2 loading, a 214% increase in single–cycle CO 2 loading, a 236% increase in CO 2 loading after four cycles compared to monoethanolamine (MEA), and a 20.76% reduction in desorption energy consumption. In addition, to address the challenge of applying polyamine mixed solutions in the simulation studies of OCC systems, the capture mechanism was analyzed using density functional theory (DFT) calculations and nuclear magnetic resonance (NMR) characterization. The results indicated that increasing AMP promoted HCO 3 − formation in the TEPA + AMP mixed amine solvent. Since HCO 3 − decomposed more easily than carbamate, it reduced desorption energy consumption. However, an excess of AMP inhibited the absorption rate of TEPA, affecting the absorption capacity. Increasing the concentration of TEPA enhanced the amine concentration in the absorbent and improved the absorption performance. Nevertheless, excessive TEPA caused AMP to participate only in deprotonation reactions, which was not conducive to reducing desorption energy consumption.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2021
·Vol. 33
·期 25
·2007073
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IF 30.849
Qingyuan Wu,Fengrong Zhang,Xueting Pan,Zhijun Huang,Zhijie Zeng,Hongyu Wang,Jun Jiao,Xiaolu Xiong,Lixin Bai,Dongsheng Zhou,Huiyu Liu
Sonodynamic therapy (SDT) is a non-invasive and highly penetrating treatment strategy under ultrasound irradiation. However, uncertainty in the mechanism of SDT has seriously hindered its future clinical application. Here, the mechanism of SDT enhanced by the wettability of nanoparticles is investigated. Nanoparticles can adsorb and stabilize nanobubbles in liquid, thus enhancing SDT efficiency. The stability of the nanobubbles is positively correlated with the desorption energy of the nanoparticles, which is determined by the wettability of the nanoparticles. This conclusion is verified for mesoporous silica and polystyrene nanoparticles and it is found that nanoparticles with a water contact angle of about 90° possess the largest desorption energy. To further apply this conclusion, thrombus models are constructed on rats and the experimental results demonstrate that nanoparticles with the largest desorption energy have the highest thrombolytic efficiency. It is believed that these findings will help to better understand the SDT mechanism and guide new strategies for rational design of nanoparticles adopted in SDT.
研究领域:
生物医学工程
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纳米技术
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超声治疗
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溶栓
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Kai Zong,Dongshun Deng
In this study, we proposed a robust and efficient accelerator-silicic acid (SA) to support metal chlorides (MCl x ) as adsorbents for NH 3 adsorption and separation. Their structures and NH 3 adsorption performance were systematically investigated. Results revealed that SA with abundant hydroxyl group could dissociate and immobilize MCl x to realize synergistic M x + –NH 3 coordination and Cl - –NH 3 hydrogen bonding. Meanwhile, the interactions between the MCl x and SA significantly reduced the desorption energy of the adsorbent. The outstanding LiCl-3@SA composite demonstrated remarkable NH 3 adsorption capacity of 17.20 mmol NH 3 /g-adsorbents at 30 °C and 1.0 bar and adsorption enthalpy of −50.23 kJ/mol. Present work provided valuable information on deep understanding of MCl x −porous support interactions and strategy to design efficient composites for NH 3 capture.
研究领域:
化学工程
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材料科学
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环境科学
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产品关联
DOI
高影响因子
Small Methods
·
2019
·Vol. 3
·期 5
·1900113
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IF 0
Liu Yang,Haoxiang Xu,Huibing Liu,Daojian Cheng,Dapeng Cao
Developing efficient non-precious bifunctional electrocatalysts for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is highly critical for overall water splitting. Herein, vertically aligned CoTe and NiTe nanoarrays are synthesized in situ grown on Ni foams (marked as CoTeNR/NF and NiTeNR/NF) via a facile hydrothermal method, and further explore their catalytic activities for overall water splitting. The CoTeNR/NF catalyst exhibits not only excellent OER performance with a low overpotential of 350 mV to deliver 100 mA cm −2 , but also high HER activity only requiring 202 mV overpotential to yield 10 mA cm −2 in alkaline condition. Moreover, experimental technique and density functional theory are combined together to reveal that the real active sites of CoTeNR/NF for OER are from the in situ generated CoOOHspecies on CoTeNR/NF in the OER process, and also propose a new HER performance evaluation criteria of using H 2 O adsorption energy, H 2 O dissociation barrier, and H 2 /OH − desorption energy as an indicator. The new criteria can satisfactorily evaluate the HER performance of as-synthesized samples, while the traditional one of using H adsorption energy as an indicator fails in the HER performance evaluation of as-synthesized samples. It is expected that the new evaluation criteria can be used as a general criteria to evaluate the HER performance of other electrocatalysts.
研究领域:
材料科学
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电化学
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催化
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能源材料
✓ 已验证
产品关联
DOI
ELECTROCHIMICA ACTA
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2025
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IF 5.6
Yanlei Shen,Boyu Li,Ziyao Zhang,Jiajing Liu,Huanhuan Ren,Yuman Zhou,Weitao Zhou,Jianxin He
Spinel-structured catalysts demonstrate significant potential for sulfur reduction reaction (SRR) catalysis in lithium-sulfur batteries (LSBs) owing to their geometrically tunable active sites, yet precise structural optimization for simultaneous enhancement of lithium polysulfides (LiPSs) adsorption and catalytic conversion remains challenging. This study addresses this gap through strategic cation occupancy regulation in Co x Mn 3-x O 4 spinels, establishing a dual-active-site system comprising tetrahedral Co 3+ (Td) and octahedral Mn 3+ (Oh) centers that drive selective LiPSs electrocatalysis via geometric synergy. Theoretical and experimental analyses confirm Co 1.2 Mn 1.8 O 4 as the optimal configuration, where optimized Td/Oh Site Distribution Enables: (i) stable covalent Co-S bonding for strong LiPSs adsorption at Td sites, and (ii) dynamic Mn³⁺ (Oh)-S d -p orbital coupling via delocalized d² electrons that critically reduce LiPSs desorption energy barriers (ΔG ≤ 0.82 eV). Leveraging this complementary functionality, a Co 1.2 Mn 1.8 O 4 -embedded carbon nanofiber interlayer delivers exceptional cycling stability—achieving 400 cycles at 1 C with 74.6 % capacity retention. This work extends the application of spinel-type SRR catalysts to high-performance lithium-sulfur batteries.
研究领域:
材料科学
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电化学
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纳米技术
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能量存储
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催化
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2025
·
IF 14.1
Zongge Li,Wenjie Tian,Kunsheng Hu,Yajie Guo,Xiaotan Tian,Wenjun Kang,Rui Li,Konggang Qu,Lei Wang,Fanpeng Meng,Huayang Zhang,Haibo Li
Here, a template-engaged galvanic replacement strategy is developed to construct hollow PdAg alloy nanotubes, where interfacial oxygen drives surface reconstruction and stabilizes quasi-single Pd active sites. The interplay of atomic-scale characterizations and theoretical calculations reveals that the oxygen-induced atomic rearrangement downshifts the Pd d -band center, optimizes the adsorption-desorption energetics of ORR intermediates, and lowers the energy barrier for * OH desorption. The optimized Pd 0.30 @Ag catalyst achieves an onset potential of 0.951 V and a half-wave potential of 0.868 V in alkaline media, surpassing commercial Pt/C even at an ultra-low Pd loading (3 wt.%). Furthermore, Pd 0.30 @Ag-based electrodes deliver outstanding performance in both zinc-air batteries (ZABs) and anion-exchange membrane fuel cells (AEMFCs), demonstrating high power densities, excellent cycling stability, and strong potential for scalable platinum-free energy conversion devices. This work provides a general strategy for engineering interface-confined active sites through surface reconstruction, offering new insights into the rational design of next-generation electrocatalysts.
研究领域:
纳米材料
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电催化
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能量转换
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电池技术
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燃料电池技术
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表面工程
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）