Catalysis Science & Technology
·
2019
·Vol. 10
·期 5
·1431-1443
·
IF 5.726
Zhaohui Teng,Shan Huang,Liang Fu,Heng Xu,Na Li,Qulan Zhou
In our research, rice husk ash (RHA) was employed as a catalyst support and Fe–Cu bimetallic compounds were employed as catalysts in the reduction of NO by CO. Rice husk ash contains abundant amorphous SiO2 and it would be a good catalyst support as indicated by the characterization results. Different combustion conditions were tested to obtain the appropriate rice husk ash. Characterization methods were employed to study its physical properties. The results of the catalytic activity testing experiment were highly in accordance with the characterization results. Fe2Cu1 based on rice husk ash had approximately 100% conversion rates for both NO and CO, which indicated the superiority of the rice husk ash and Fe–Cu oxides. Moreover, the O2 content, CO/NO ratio and SO2 had little influence on this new combination. This remarkable performance was due to the strong interaction between the rice husk ash and metal species. The results of our research will provide some instructions for the improvement of industrial denitrification.
研究领域:
环境科学
·
催化化学
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DOI
高影响因子
GREEN CHEMISTRY
·
2024
·Vol. 26
·期 6
·3202-3210
·
IF 9.3
Wanbin Lin,Yihang Li,Manish Singh,Huibin Zhao,Rui Yang,Pei-Chen Su,Liangdong Fan
Reversible solid oxide cells (RSOCs) hold enormous potential for efficient direct CO2 reduction or CO oxidation in terms of exceptional faradic efficiency and high reaction kinetics. The identification of an active fuel electrode is highly desirable for enhancing the performance of RSOCs. This study explores the use of a alkaline metal dopant (Na) to modify the perovskite oxide of Na2x(La0.6−xSr0.4−x)FeO3−δ (2x = 0, 0.10, 0.20) materials with powerful CO2 chemical adsorption capacity, high oxygen ion conductivity, and low average valence of Fe sites for CO2/CO redox reactions. The experimental results indicate that the cells with the NaLSF0.10 fuel electrode achieve a current density of 1.707 A cm−2 at 1.5 V/800 °C and excellent stability over 120 hours at 750 °C for pure CO2 electrolysis, approximately 33.4% improvement over the pristine sample. When operated under a mixed CO–CO2 atmosphere under RSOC mode, the cell outputs the performance of 1.589 A cm−2 at 1.5 V and 329 mW cm−2 at 800 °C, and demonstrates relatively durable operation over 25 cycles. The addition of low valence sodium ions with high basicity and low electronegativity reduces the oxygen vacancy formation energy, increases the concentration of oxygen vacancies and modifies the electronic structure of LSF, thus enhancing CO2 adsorption, dissociation processes and charge transfer steps as corroborated by the detailed experimental analysis. Combined with the acceptable anti-carbon deposition capability, we prove here a feasible strategy and provide new insights into designing novel electrodes for SOEC/RSOCs to effectively convert CO2 with potential for renewable energy storage.
研究领域:
材料科学
·
电化学
·
能源存储
·
固体氧化物燃料电池
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Kun Gao,Mengxia Shen,Chao Duan,Chuanyin Xiong,Lei Dai,Wei Zhao,Wanli Lu,Shujiang Ding,Yonghao Ni
A reasonable design of the pore structure of carbon nanofiber-based electrocatalysts can effectively accelerate the slow kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). In this study, we report an electrospinning method by adding supramolecular coordination polymers to selected polyacrylonitrile (PAN) and cellulose acetate (CA) spinning systems. Benefiting from the difference in the thermal decomposition temperature of each component during the pyrolysis process, CA was applied as a sacrificial template to prepare a high-efficiency ORR/OER bifunctional electrocatalyst (Co-N@PCNFs-0.2) with directional hollow channels and a hierarchical pore structure. This unique multichannel carbon nanofiber morphology and hierarchical pore structure led to abundant active sites while also boosting the electron transfer rates. Notably, applying Co-N@PCNFs-0.2 as an air electrode to Zn–air batteries results in a large specific discharge capacity of 884 W h kgZn–1 and a maximum power density of 151 mW cm–2.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2020
·
IF 4.794
Heping Wang,Ting Wang,Rongrong Ma,Kai Wu,Honglan Li,Bang Feng,Cong Li,Yehua Shen
The sulfonated covalent organic frameworks (COF@SO 3 H) have been synthesized by a simple one-step solvothermal reaction and used to adsorb Cd 2+ , Co 2+ , and Cr 3+ metal ions from aqueous solution. The structure, composition and stability of as-prepared material were confirmed by FT-IR, PXRD, BET and TGA, and a fiber bundle-like COF@SO 3 H could be observed in the SEM and TEM images. The adsorption behaviors of Cd 2+ , Co 2+ , and Cr 3+ onto COF@SO 3 H were studied through batch adsorption experiments, and the obtained data were analyzed using various models. The adsorption process of the three ions can be better described by the Langmuir isotherm and the pseudo-second-order kinetics than other models tested, and the maximum adsorption capacities for Cd 2+ , Co 2+ and Cr 3+ at 298 K are 81.97, 77.52, and 105.26 mg g −1 , respectively. The thermodynamic parameters indicate that the adsorption of Cd 2+ onto COF@SO 3 H is spontaneous, which is more favorable than Co 2+ and Cr 3+ . Moreover, the adsorbed metal ions can be easily eluted by nitric acid or EDTA solution, and the COF@SO 3 H can be reused for more than 5 adsorption-elution cycles without obvious collapsing in structure and reducing in adsorption capacity. All the results suggested that the COF@SO 3 H could be used to the adsorption and removal of heavy metal ions from wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Nature Communications
·
2020
·Vol. 11
·期 1
·1-10
·
IF 12.121
Zhou Jing,Zhang Linjuan,Huang Yu-Cheng,Dong Chung-Li,Lin Hong-Ji,Chen Chien-Te,Tjeng L. H.,Hu Zhiwei
The ability to determine the electronic structure of catalysts during electrochemical reactions is highly important for identification of the active sites and the reaction mechanism. Here we successfully applied soft X-ray spectroscopy to follow in operando the valence and spin state of the Co ions in Li 2 Co 2 O 4 under oxygen evolution reaction (OER) conditions. We have observed that a substantial fraction of the Co ions undergo a voltage-dependent and time-dependent valence state transition from Co 3+ to Co 4+ accompanied by spontaneous delithiation, whereas the edge-shared Co–O network and spin state of the Co ions remain unchanged. Density functional theory calculations indicate that the highly oxidized Co 4+ site, rather than the Co 3+ site or the oxygen vacancy site, is mainly responsible for the high OER activity.
研究领域:
电化学
·
催化
·
材料科学
·
光谱学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2026
·Vol. 27
·期 15
·6704
·
IF 5.6
Tao Wu,Chaoyang Shi,Chenyang Liu,Chenjie Qin,Jiangshan Wang,Yating Pang,Wenjun Gong,Wenming Wang,Hongfei Wang
Two tri-carbonyl complexes, [Mn(CO)3(5cpa)Br] (1) and [Re(CO)3(5cqn)(OCH3)] (2), were synthesized, where 5cpa is 5-Cl-2-picolinic acid and 5cqn is 5-Cl-8-Hydroxyquinoline. Their structures were determined using X-ray diffraction techniques. The electronic absorption and IR spectra of the complexes were experimentally measured and theoretically assigned through density functional theory (DFT) calculations. The photo-induced CO release was verified using time-resolved infrared spectroscopy, and the transfer of CO to hemoglobin (Hb) was monitored by UV-vis spectroscopy. The rate of CO release and transfer from Mn complex1is significantly faster than that from Re complex2. Complex2exhibits higher cytotoxicity against HeLa cells than complex1, with IC50values of 40.1 μM and 10.6 μM for1and2, respectively, which decrease to 16.2 μM and 4.9 μM after photo irradiation. Moreover,1exhibited a stronger binding constant (Kb) with human serum albumin (HSA) than2, with values of 1.6 × 106and 7.0 × 105M−1, respectively. The structures of HSA complex adducts revealed that both the resulting [Mn(CO)3(5cpa)]−and [Re(CO)3(5cqn)]−group coordinate with the N atom of His146, while four additional dissociated Mn-CO groups were observed to bind to HSA for complex1. This study provides insights into the stability, possible metabolic pathways, and potential applications of these carbonyl complexes.
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 33
·27485-27493
·
IF 3.289
Yunze Wang,Haibo Lin,Zhu Xiong,Ziyang Wu,Xuemin Yu,Yi Wang,Fu Liu
An interesting PVDF membrane with unusual thermoresponsive behavior was prepared by the incorporation of P(OEGMA-co-VTMOS). The P(OEGMA-co-VTMOS) copolymer was first in situ synthesized in a PVDF/triethyl phosphate (TEP) casting solution. A P(OEGMA-co-VTMOS) network was assembled in the PVDF membrane through hydrolysis and condensation during phase inversion. PVDF/P(OEGMA-co-VTMOS) in organic solvent demonstrated a typical LCST around 35 °C, reflecting the reversible transition of the coil-to-globule conformation. Microphase separation was responsible for the appearance of turbidity of the casting solution. FTIR, XPS, TGA and SEM confirmed the surface enrichment of the copolymer, especially in the membrane bottom. The hydrophilicity and protein anti adsorption were improved despite the temperature variation. In particular, AFM in aqueous media was conducted to determine the reversible morphology and water channel variation under heating and cooling. Different from common thermoresponsive membranes, the so-modified PVDF membranes exhibit a reversible abnormal change of pure water flux and BSA rejection with temperature. The intriguing thermoresponsive behavior and mechanism of the modified PVDF membrane was thoroughly investigated from the aspects of PVDF/TEP casting solution, membrane morphology in aqueous media and water/BSA filtration performance.
研究领域:
材料科学
·
膜技术
·
高分子化学
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DOI
高影响因子
BIOCHIMICA ET BIOPHYSICA ACTA-GENERAL SUBJECTS
·
2022
·
IF 4.117
Tan Qin,Yu Wang,Jing Nie,Lushan Yu,Su Zeng
Background Sodium taurocholate co -transportering polypeptide (NTCP, SLC10A1 ) is a vital bile acid transporter and the functional receptor of hepatitis B and D virus. The oligomerization of NTCP is important for the structural study of its interaction with HBV preS1 peptide. Methods Recombinant NTCPs were expressed in Sf9 host cell using baculoviruses. Function of recombinant NTCP was verified by liquid chromatography-mass spectrometry/mass spectrometry (LC-MS/MS) method. A quantitative fluorescence resonance energy transfer (FRET) method was established to analyze the interaction between NTCP wild type (WT) and mutants. Co-immunoprecipitation (Co-IP) was used to test the interaction between NTCP variants. Results Sub-cellular location of recombinant NTCPs varies with the modification of NTCP. Bands of monomer, dimer and oligomers were shown in gel analysis of NTCP. Significant FRET was observed between cyan florescence protein (CFP) tagged NTCP and yellow florescence protein (YFP) tagged NTCP. FRET efficiency between CFP- and YFP-NTCP S267F mutants was lower than WT. Co-IP results showed that S267F interacts with WT NTCP when co-expressed in cell. Conclusion Dimer is the predominant form of NTCP expressed in Sf9 when solubilized with detergent. FRET and Co-IP analysis support that NTCP forms oligomers in Sf9 cell. General significance Our results showed that NTCP formed oligomers in Sf9 cell. Meanwhile the FRET analysis of NTCP variants further elucidated the molecular mechanism of NTCP oligomerization.
研究领域:
病毒学
·
分子生物学
·
细胞生物学
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DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Bin Fu,Yuqiong Zhao,Shipeng Zhang,Ying Wang,Jun Liu,Guojie Zhang
Nickel-based catalysts frequently encounter significant challenges in achieving both high CO 2 conversion and superior CO selectivity during reverse water gas shift (RWGS) reactions. To address this issue, we developed a facile strategy to prepare highly dispersed Ni/CeO 2 catalysts by forming Ce 1−x Ni x O 2−y solid solutions. Under conditions of 300–600 °C, 0.1 MPa, and a gas hourly space velocity (GHSV) of 40,000 mL g cat −1 h −1 , the 5Ni/CeO 2 -A catalyst exhibited outstanding selectivity, approaching 100 %. The RWGS reaction rate reached 1332 μmol CO g Ni −1 s −1 and maintained stable for 50 h almost without deactivation. The formation of Ce 1−x Ni x O 2−y solid solution uniformly disperses numerous Ni species in the CeO 2 lattice, effectively inhibiting Ni aggregation. This highly dispersed Ni weakens CO adsorption and facilitates its direct desorption without excessive hydrogenation. Moreover, the catalyst remains well-dispersed state even after reduction. The formed Ce 1−x Ni x O 2−y solid solution generates abundant oxygen vacancies on the catalyst surface, enhancing H 2 dissociation. The catalyst’s pore size distribution is also modified, creating stacked pores that favor reactant diffusion and expose more active centers. In-situ DRIFTS experiments demonstrate that Ce-OH plays a pivotal role in CO 2 adsorption on the 5Ni/CeO 2 -A catalyst, while the stabilization of bicarbonate and formate intermediates by the highly dispersed Ni further promotes catalytic performance. This study introduces a novel preparation method and provides valuable insights for designing Ni-based catalysts with exceptional CO selectivity.
研究领域:
催化化学
·
材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING & TECHNOLOGY
·
2015
·Vol. 38
·期 2
·291-296
·
IF 2.442
Chen Zhou,Yexin Zhang,Lingjun Hu,Hongfeng Yin,Wei Guo Wang
Mn-doped La 0.8 Sr 0.2 CoO 3 perovskite oxides (La 0.8 Sr 0.2 Co 1– x Mn x O 3 ; x = 0, 0.1, 0.3, 0.5) were synthesized by a modified sol-gel method. The phase-pure oxides were obtained. CoO and carbonates were formed on the surface of La 0.8 Sr 0.2 CoO 3 . With increasing doping content, these impurities were reduced while the stability of the perovskite structure was improved. The valence state of B-site ions and the amount of absorbed oxygen were influenced by Mn doping. The catalytic activity of the perovskite catalysts was investigated for CO oxidation and simultaneous removal of CO, C 3 H 8 , and NO. For CO and NO removal, La 0.8 Sr 0.2 Co 0.9 Mn 0.1 O 3 exhibited the best performance. For C 3 H 8 removal, the reactivity was promoted linearly with the doping content. The structure-activity relationship is also discussed.
研究领域:
材料科学
·
催化化学
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Yang Zhang,Dan Wang,Xintong Zhang,Ying Chen,Lina Kong,Peng Chen,Yinglin Wang,Changhua Wang,Lingling Wang,Yichun Liu
Improving charge transportation and interfacial charge transfer in semiconductor photoelectrodes are two critical issues for achieving high-efficiency photoelectrochemical (PEC) water splitting. Herein, a combined hydrogenation treatment and cobalt-phosphate (Co-Pi) deposition is reported to dramatically enhance the PEC performance of nanoporous BiVO 4 photoanode. Linear sweep voltammograms show that after the combined treatment, photocurrent density of nanoporous BiVO 4 photoanode is increased for ca. 3 times at 1.23 V versus reversible hydrogen electrode (RHE), and the onset potential is negatively shifted from 0.53 V to 0.23 V versus RHE. Combined photoluminescence, Mott-Schottky, open circuit potential, as well as electrochemical impedance spectroscopy analyses reveal the synergistic effect of hydrogenation treatment and Co-Pi deposition on enhancing the PEC performance of nanoporous BiVO 4 photoanode, facilitating both charge transportation and interfacial charge transfer without aggravating charge recombination.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
Nano Energy
·
2017
·
IF 12.343
Xiaolin Lv,Kaiqi Nie,Huiwen Lan,Xin Li,Youyong Li,Xuhui Sun,Jun Zhong,Shuit-Tong Lee
Hematite is a promising photocatalyst for solar water splitting while its performance has been severely limited by various factors. Recently surface Fe 2 TiO 5 layer was widely reported to enhance the performance of hematite with a favorable band position to facilitate hole transport. Here we further show that the Fe 2 TiO 5 -incorporation in bulk hematite can also improve the performance with faster charge separation. Moreover, it can be well coupled with surface P-modification to simultaneously improve charge separation and hole transfer with a synergetic effect. The Ti and P co-modified hematite shows a significantly enhanced photocurrent of 2.37 mA/cm 2 at 1.23 V vs. RHE when compared to the pristine value of 0.85 mA/cm 2 . After coupling with Co-Pi catalysts, the hematite sample can even achieve a stable, high photocurrent of 2.90 mA/cm 2 at 1.23 V vs. RHE. The design of Ti and P co-modified hematite hollow nanostructures can be used as a promising candidate for solar water splitting applications. The discrete Fe 2 TiO 5 -incorporation also provides a good insight on the mechanism to understand other Ti-based treatments of hematite.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）