Research
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2018
·
IF 0
Jianchao Sun,Yong Lu,Hao Yang,Mo Han,Lianyi Shao,Jun Chen
Na-CO 2 batteries have attracted significant attentions due to their high energy density and effective utilization of greenhouse gas CO 2 . However, all reported Na-CO 2 batteries employ excessive preloaded metal Na, which will lead to safety issues such as dendrite formation and short circuit. In addition, the charging mechanism of reported Na-CO 2 batteries is not very clear. Here we report the Na-CO 2 batteries, starting from the cathode of cheap Na 2 CO 3 and multiwalled carbon nanotubes (CNTs). Due to the effective electron transfer and high reactivity, the decomposition of Na 2 CO 3 and CNTs could take place under 3.8 V. The charging mechanism of 2Na 2 CO 3 + C → 4Na + 3CO 2 without any side reactions is revealed by in/ex situ techniques such as Raman, gas chromatograph, and optical microscope. Dendrite-free Na can quantitatively deposit on the Super P/Al anode because of large specific surface area and low nucleation barrier of the anode for Na plating. The batteries could deliver an energy density of 183 Wh kg −1 (based on the whole mass of the pouch-type batteries, 4 g) with stable cycling performance. This work reveals that safe rechargeable Na-CO 2 batteries could be constructed by cheap Na 2 CO 3 and multiwalled carbon nanotubes.
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DOI
Journal of Materials Chemistry A
·
2012
·Vol. 1
·期 3
·752-758
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IF 0
Heping Ma,Hao Ren,Xiaoqin Zou,Fuxing Sun,Zhuojun Yan,Kun Cai,Dayang Wang,Guangshan Zhu
Novel porous aromatic frameworks, PAF-18-OH and its lithiated derivative PAF-18-OLi, have been successfully synthesized. In particular, PAF-18-OLi displays significant enhancement of H2 and CO2 adsorption capacity, especially for CO2 uptake (14.4 wt%). More valuably, the stable PAF-18-OLi material exhibits high CO2/N2 selectivity, as high as 129 in the case of CO2 capture from simulated post-combustion flue gas mixtures (85% N2 and 15% CO2). Furthermore, the PAF-18-OLi has shown improved H2 storage capacity after lithiation.
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DOI
LANGMUIR
·
2018
·
IF 3.789
Hui He,Hanying Tang,Xingjuan Chen,Xudong Hou,Xiaochong Zhou,Hong Chen,Shanyan Wu,Shuangfei Wang
A novel low-temperature regenerative hydroxy-functionalized hyperbranched polyamine adsorbent (0.16OH-HBPA) for CO2 capture was readily prepared using glutaraldehyde to cross-link amino-terminated hyperbranched polymers (HBP) and functionalized with glycidol, followed by the reduction of the imino groups of 0.16OH-HBPA to alkyl aminos using NaBH4. Here, the HBP has been prepared through the one-pot reaction between pentaethylenehexamine and methyl acrylate. The as-prepared 0.16OH-HBPA adsorbent showed a high adsorption capacity (4.05 mmol/g) for CO2 (concentration, 10%) in the presence of water at 25 °C, and the alkyl amino utilization efficiency reached 73%. More importantly, the CO2-adsorbed 0.16OH-HBPA showed excellent regenerative performance at low temperatures (85 °C, under pure CO2 gas) due to the introduced hydroxyl that can cooperatively adsorb CO2 via the amino groups to form stable carbamic acid. This process suppressed the formation of open-chain urea and cyclic urea and could overcome the disadvantages of high regeneration temperatures (≥90 °C, under pure inert gas) of CO2-adsorbed traditional solid amine adsorbents.
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高影响因子
Greenhouse Gases-Science and Technology
·
2018
·Vol. 9
·期 1
·10-18
·
IF 1.991
Wei Liu,Ye Wu,Tianyi Cai,Xiaoping Chen,Dong Liu
Global climate change resulting from substantial CO 2 emissions is increasingly attracting attention, and coal-fired power plants are a major source of CO 2 emission, so it is necessary to control and reduce CO 2 emissions from power plants. Using alkali-based solutions for CO 2 capture is thought to be an effective method to achieve this but poor CO 2 sorption/desorption kinetics inhibit its development. The use of nanofluids, prepared by adding nanoparticles to an alkali-based solution, is a promising way to improve CO 2 sorption/desorption reactivity because the addition of nanoparticles not only improves the gas-liquid mass/heat transfer but also enhances the reaction kinetics. In this paper, a nanostructured Cu/TiO(OH) 2 was prepared and used to accelerate the CO 2 sorption/desorption performance of a potassium-based solution. The CO 2 sorption/desorption reaction rates increased with the thermal conductivity of the nanofluid but the inclusion of more nanoparticles resulted in particle sedimentation. The potassium-based solution containing 0.014 vol% of the nanostructured Cu/TiO(OH) 2 was therefore the targeted nanofluid that gave the best CO 2 sorption/desorption performance and cyclic stability. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd.
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高影响因子
International Journal of Greenhouse Gas Control
·
2024
·
IF 4.6
Kang Shunji,Shen Zhi,Liu Baiqiang,Yi Qun,Ma Jun,Song Hao,Shen Xizhou
The petrochemical industry has a significant demand for high-purity hydrogen. It primarily obtained from the H 2 purification unit by using pressure swing adsorption (PSA) technology to recover H 2 from medium-temperature shifting gas (MTSG). The the coupled wet CO 2 separation-PSA process was introduced in this work, aiming to capture CO 2 from MTSG while simultaneously increasing the H 2 recovery rate. To enhance the desorption pressure of CO 2 separation unit in the coupled process to facilitate the storage or utilization of the captured CO 2 , firstly, a rigorous thermodynamic study was carried out to provide a theoretical basis for the development of an improved CO 2 solvent. Subsequently, a pilot-scale test was executed to validate the theoretical findings. Finally, the patented coupled process was implemented at an industrial scale for the first time. The results showed that the capacity of PSA unit for H 2 purification increased from 6800 to 12,000 tons per year and the H 2 recovery rate increased from 84.6 % to 93.6 %; the CO 2 desorption pressure increased from about 0.03 MPa (traditional Benfield process) to 0.15 MPa, which reduced the energy consumption of CO 2 compression, and the total average annual economic benefits increased by US $ 15.55 million.
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高影响因子
Carbon Capture Science & Technology
·
2025
·
IF 10.5
Jia Song,Long Shi,Jing Wei,Min Deng,Zikang Qin,Lin Yang,Junfeng Zheng,Wenju Jiang,Lu Yao,Zhongde Dai
Axial coordination engineering is a promising method to regulate the active sites of single atom catalysts (SACs) in Electrochemical reduction of CO 2 (ECR) and further realize the manipulating of the electrocatalytic activity, selectivity, and stability of catalysts. Here, a facile post-synthetic modification strategy of metal exchange and heteroatom dopant was proposed to develop a single iron atom catalyst coordinated with four planar N atoms and one axial Br atom (denoted as Fe x -NCBr y ) for ECR to CO. By altering the operating conditions including pyrolysis temperature as well as dopant amount of Fe and Br, the optimized Fe 20 -NCBr 0.3 catalyst acquired more surface-active sites and lower impedance, exhibiting an enhanced CO selectivity of 93.78% with a CO reduction current density of -21.16 mA cm −2 at -0.9 V (vs. RHE). This work provides fresh possibilities for tuning the SACs coordination environment with an axial heteroatom for improved ECR performance.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yongxin Guo,Hongda Zhang,Jianxun Ma,Yuhan Zheng,Gang Wang,Yong Yu
CO 2 capture and storage (CCS) is an effective way to solve the problem of high CO 2 emissions caused by large-scale use of fossil energy. Conventional CCS processes usually employ ethanolamine to store and produces toxicants during high-temperature regeneration. Here a functionalized hydrogel (FMI) consisting of Pluronic F127 by crosslinking imidazolidinyl urea (IU) was prepared. The incorporation of IU enhanced the FMI affinity for CO 2 by introducing a considerable number of N H bonds. The formation of hydrogen bonds facilitated the sequestration of CO 2 and improved the stability and plasticization resistance of the FMI. Meanwhile, a production blueprint was presented for converting captured CO 2 to volatile fatty acids (VFAs) by microbial refining. The addition of Pt/Fe 2 O 3 into biorefinery promoted the metabolic process of microorganisms by providing electron donors and acceptors. The carbon utilization was up to 97.27% and the concentration of produced VFAs was 33.98 g/L. Metagenomics further illuminated the microbial mechanism and confirmed feasibility of utilizing CO 2 to produce VFAs. The integration of hydrogel CO 2 capture technique with the biorefinery process improved the utilization of industrial waste gases and efficiency of biomass conversion. This study provides a non-toxic and environmentally friendly process in industrial waste gas separation and high value utilization.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2026
·
IF 4.5
Zhiyu Zhang,Jianfeng Zheng,Yujing Han,Guoyu Wang,Hongqiang Yang,Zhanggen Huang
The excellent CO 2 adsorption capacity of 13X zeolite makes it a promising candidate for carbon capture, and its performance can be further improved by methods like metal incorporation. However, the definitive relationship between extra-framework unsaturated metal sites and CO 2 adsorption mechanisms remains poorly understood. In this work, a convenient strategy was developed to optimize the proportion of Cu 2+ species in CuX zeolites by adjusting the Cu loading and calcination temperature. Through dynamic and static adsorption measurements, the optimized sorbents 3CuX-450 (3 wt% Cu, calcined at 450 o C) exhibited significantly enhanced CO 2 uptake, adsorption rate, and adsorption heat. Comprehensive characterization, including XPS, H 2 -TPR, and DFT calculations, elucidated the evolution and the quantity of Cu 2+ species. The 3CuX-450 sorbent had relatively high CO 2 uptake, adsorption rate and adsorption heat. Meanwhile, it demonstrated excellent recyclability and maintains its performance for 10 successive adsorption-desorption cycles. This study deepens the understanding of mechanistic role of cations in FAU zeolites. The findings of this study can be applied to the rational design of optimized CO 2 active sites in zeolite-based sorbents.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Jingce Bi,Yan Qian,Qingfeng Zhan,Huichun Xue,Ningning Liu,Xia Zhang,Zhuopeng Wang,Lin Zhu,Hongzhu Xing,Yide Han
Nickel Metal-Organic Frameworks (MOFs) Ni-BDC (BDC: 1,4-benzenedicarboxylic acid) with coordination-unsaturated metal sites (CUMs) exhibits remarkable CO 2 reduction activity under visible-light irradiation. However, its photocatalytic mechanism remains a challenging due to complex charge-transfer pathways. Herein, a series of CUMs-tunable MOFs (Ni-BDC-D x ) were synthesized via a pyrazine-assisted aqueous-phase strategy for photocatalytic CO 2 reduction. A positive correlation is found between the CUMs density and photocatalytic activity, and Ni-BDC-D 1.0 with highest CUMs density achieves a remarkable CO production rate of 3503.1 μmol·g −1 ·h −1 , which is 5.2 times higher than conventional bulk Ni-BDC. Experimental and theoretical results reveal that CUMs induce the formation of defect level and enhance CO 2 adsorption. The defect level serves as electron trap to promote localized charge accumulation by the optimizing charge transfer pathway. This pathway is achieved by facilitating non-radiative relaxation pathway to inhibit radiative carrier recombination behavior. These findings provide insights into electron transfer mechanism on CUMs-rich Ni-BDC for photocatalytic CO 2 reduction.
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PubMed
高影响因子
Small
·
2026
·
IF 11.8
Lu Jiang,Yaning Liu,Qinghua Liu,Zhiwei Yang,Miao Ji,Haonan Chen,Xinya Chen,Furong Qiao,Xiao Huang,Gang Lu
Copper (Cu)-based catalysts are widely employed in electroreduction of carbon dioxide (CO 2 ER) because of their cost-effectiveness and versatility in producing multi-carbon products. However, improving the product selectivity, especially toward C 2 species (hydrocarbon containing two carbon atoms), remains a significant challenge. Herein, the microwave-assisted synthesis of copper oxide (CuO) is modulated with ammonium hexafluorophosphate (NH 4 PF 6 ), obtaining thin CuO (ca. 12 nm in thickness) nanosheets with the surface adsorbed with hexafluorophosphate, referred as CuO-PF 6 . This CuO-PF 6 catalyst could help stabilize the key reaction intermediates during CO 2 ER. Therefore, the Faradaic efficiency (FE) of C 2 products (ethylene and ethanol) during CO 2 ER could be improved to 75.8% ± 0.5% in an H-type electrochemical cell. This C 2 FE increases to 82.4% in a flow cell. The improved FE toward C 2 species could be attributed to the PF 6 -modulated electronic structure of Cu surface and stabilization of key reaction intermediates, especially those involving C 2 production. In addition, CuO-PF 6 also demonstrates a high catalytic stability over 10 h. This work provides a deeper understanding of surface modification strategy for CO 2 ER enhancement, promising for designing hybrid electrocatalysts with high efficiency and stability for CO 2 -to-fuel conversion.
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PubMed
高影响因子
ChemSusChem
·
2026
·Vol. 19
·期 1
·e202501680
·
IF 6.6
Jinlong Wu,Haiqiang Mu,Min Zhu,Xueru Zhao,Ting Zhang,Jiaxin Bai,Jin Zhang,Feng Li,Jing Li
Copper-based catalysts offer promise for CO 2 -to-C 2+ conversion but suffer from instability of Cu + species, which are active sites critical for enabling C−C coupling. In this work, we synthesized Lanthanum (La)-doped Cu x O (La-Cu x O) catalysts with varying La/Cu ratios to investigate how the interplay between doping-induced electronic effects and grain boundary (GB)-driven stabilization affects deep CO 2 reduction to C 2+ . Combined density functional theory calculations and in situ spectroscopic characterization reveal that the unique 4f orbital configuration and strong Lewis acidity facilitate charge transfer of La, stabilizing Cu + during CO 2 reduction reaction (CO 2 RR), while simultaneously inducing lattice distortion to increase GB density. This modulation preserves Cu + /Cu 0 interfaces while enhancing *CO dimerization kinetics. Furthermore, La doping boosts *CO coverage at GB-rich regions and lowers the C−C coupling barrier. The optimized La-Cu x O-2 catalyst (La/Cu = 0.224) achieves a 45.2% C 2 H 4 Faradaic efficiency (FE) and 75.4% C 2+ FE at −0.8 V RHE , with partial current densities of 87.5 and 146.7 mA cm −2 , respectively, surpassing undoped Cu x O. Remarkably, it retains more than 90% initial activity after 24 h operation, demonstrating exceptional stability. This work provides a rational strategy for stabilizing Cu + and tailoring pathways via rare-earth doping. Graphical La doping stabilizes Cu + /Cu 0 interfaces via electronic modulation and lattice distortion, enhancing grain boundary density in Cu x O catalysts for efficient CO 2 electroreduction. The optimized La-Cu x O-2 achieves 75.4% C 2+ Faradaic efficiency and 146.7 mA cm −2 partial current density at −0.8 V versus reversible hydrogen electrode, suppressing hydrogen evolution and enabling scalable CO 2 -to-C 2+ conversion.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9
Haiying Xiao,Mingdong Li,Ying Qin,Zhangfa TONG,Lishuo Li
A sustainable and integrated strategy is developed for the synthesis of nitrogen-doped porous carbons (HNPCs) using organically modified CaCO₃ nanofluids as multifunctional precursors, and their CO₂ separation performance is systematically evaluated. Cubic and spherical CaCO 3 nanofluids were prepared using M2070 and KH560 as organic modifiers to form an organic crown-like structure, followed by programmed pyrolysis at 800 °C to obtain HNPCs. The obtained HNPCs exhibit well-developed porous structures with a high BET surface area of 777.3 m 2 ·g −1 , a micropore volume of 0.0928 cm 3 ·g −1 , and a nitrogen content of 2.79 wt% (elemental analysis). XPS analysis reveals that pyrrolic N (48.98%) and pyridinic N (26.47%) are the dominant nitrogen species, contributing to enhanced CO₂ adsorption affinity. The spherical CaCO₃-derived sample (SNPC(II)) shows superior CO₂ uptake capacities of 2.85 mmol·g −1 at 25 °C and 3.98 mmol·g −1 at 0 °C under 1 bar. The isosteric heat of adsorption ranges from 17.3 to 36.5 kJ·mol −1 , indicating a physisorption-dominated and energy-efficient process. Ideal Adsorbed Solution Theory predicts a CO 2 /N 2 selectivity of 34.19 at 298 K and 1 bar. Fixed-bed breakthrough experiments using simulated flue gas (15 vol% CO₂/85 vol% N₂) demonstrate a CO₂ breakthrough time of 4631 s·g −1 , markedly longer than that of N₂ (342 s·g −1 ). Moreover, SNPC(II) retains 98.7% of its initial CO₂ capacity after eight adsorption–desorption cycles, highlighting excellent cyclic stability.
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高影响因子
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