Advanced Energy Materials
·
2024
·
IF 24.4
Rongrong Deng,Qibo Zhang
The development of advanced electrocatalysts with exceptional performance at high current densities is pivotal for reducing electric energy consumption in industrial water splitting for hydrogen production. Herein, a flexible one-step electrodeposition approach is developed to synthesize superhydrophilic 3D flower-like clusters of Cu–Co–P nanosheets grown in situ on nickel foam (NF). Introducing Cu into Co–P causes strong electron interactions, forming an electronic configuration favorable for the adsorption and desorption of intermediates, which significantly improves the intrinsic catalytic activity. The as-deposited Cu–Co–P/NF display notable bifunctional catalytic activity with low overpotentials of 259 and 65 mV for the oxygen and hydrogen evolution reactions, respectively, at 10 mA cm −2 . Superwetting 3D flower-like nanostructures are conducive to the penetration of electrolytes and the rapid release of bubbles, enabling the efficient utilization of active sites and the timely release of bubble stress under high current densities. An assembled Cu–Co–P/NF(+, −) electrolyzer achieves an impressive voltage of 1.85 V at 500 mA cm −2 for water splitting and appreciable stability for over 220 h under simulated industrial conditions. This work offers an attractive strategy for regulating superaerophobic Co–P electrocatalysts for industrial water splitting, which can contribute to practical applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Hassanien Gomaa,Cuihua An,Penggang Jiao,Wenliu Wu,Hassan A.H. Alzahrani,Mohamed A. Shenashen,Qibo Deng,Ning Hu
Owing to the high cost of precious metal catalysts for the oxygen evolution reaction (OER), the production of highly efficient and affordable electrocatalysts is important for generating pollution-free and renewable energy via electrochemical processes. A facile hydrothermal approach was employed to synthesize hybrid mesoporous iron-nickel bimetallic sulfides @ P, N -doped carbon for the OER. The prepared Fe 0.5 NiS 2 @C exhibited an overpotential (η) of 250 mV at 10 mA/cm 2 . This exceeded the overpotentials recently reported for surface-modified P, N -doped carbon-based catalysts for the OER in a 1 M KOH medium. Moreover, the Fe 0.5 NiS 2 @C catalyst showed a notable Tafel slope of 90.5 mV/dec with long-dated stability even after 24 h at 10 mA/cm 2 . The superior OER performance of the Fe 0.5 NiS 2 @C catalysts may be due to their large surface area , sheet-like morphology with abundant active sites, fast transfer of mass and electrons, control of the electronic structure by co-treatment with heteroatoms (e.g., P and N), and the synergistic effect of bimetallic sulfides, making them favorable catalysts for the oxygen evolution reaction. Density functional theory (DFT) calculations showed that the Fe 0.5 NiS 2 @C catalyst exhibited strong H 2 O-adsorption energy. The enhanced OER activity of Fe 0.5 NiS 2 @C was attributed to its higher surface area, favorable H 2 O adsorption energy , improved electron transfer efficiency, and lower Gibbs free energy compared to those of the other proposed catalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMBUSTION AND FLAME
·
2024
·
IF 5.8
Yuwen Deng,Wenhao Yuan,Sandro Gaïl,Wei Li,Long Zhao,Jiuzhong Yang,Fei Qi,Yuyang Li,Philippe Dagaut
Pyrolysis and oxidation of p -xylene over wide conditions were studied in this work in order to provide a comprehensive insight into the combustion chemistry of p -xylene. Concerning this goal, the pyrolysis of p -xylene was investigated in a flow reactor at pressures from 0.04 to 1 atm over the temperature range of 1000–1600 K. Key radicals, isomers and PAH products including three xylyl isomers, benzyl, xylylene isomers, styrene, benzene, fulvene, indene, naphthalene and phenanthrene, were identified and quantified using synchrotron vacuum ultraviolet photoionization mass spectrometry. The oxidation of p -xylene was studied in a jet-stirred reactor at 10 atm, 800–1300 K and equivalence ratios of 0.5–2.0 with a residence time of 0.5 s. Oxidation products were quantified by using gas chromatography combined with mass spectrometry and Fourier transform infrared spectrometry. A kinetic model for p -xylene combustion over wide conditions was developed based on our previously proposed p -xylene oxidation model and validated against the new experimental measurements in this work and literature reported experimental data, including flow reactor oxidation, laminar premixed flame, ignition delay time and laminar burning velocity. In the flow reactor pyrolysis, p -xylene mainly undergoes unimolecular decomposition to yield p -xylyl, which mainly suffers the H-loss reaction to form p -xylylene and isomerization reaction to form o -xylyl. The resonantly stabilized fulvenallenyl and benzyl radicals play an important role in the formation of bicyclic and tricyclic PAHs including indene, naphthalene, and phenanthrene. In the JSR oxidation, p -xylene is predominantly consumed via H-abstraction by oxygenated radicals such as OH, O, and HO 2 forming p -xylyl, which can be oxidized by HO 2 and eventually converted to p -methylbenzaldehyde. As the most abundantly produced oxygenated aromatics, further consumption of p -methylbenzaldehyde results in the formation of other observed oxygenated aromatics such as cresol, benzofuran, and benzaldehyde. The combustion chemistry of three C 8 H 10 isomers, i.e., p -xylene, o -xylene, and ethylbenzene, were also compared in terms of pyrolysis and oxidation fuel reactivity, and PAHs formation and growth, showing remarkable fuel isomeric effects.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Chang Xi,Wenxiu Xu,Shaobo Zhou,Yucheng Wang,Sheng Han,Jibo Jiang
The construction of non-uniform interfaces with inert metal-free electroactive materials is essential to achieve rapid kinetics and high ion/electron transfer rates for HER. Herein, an efficient synthesis strategy is employed, which is the construction of single-atom phosphorus-doped MoS 2 nano-arrays on nitrogen-doped graphene oxide aerogel (P–MoS 2 /NGA), providing a good guarantee for rapid charge transfer and the long-term stability by preventing the massive accumulation of P–MoS 2 . Benefiting from this strategy, the optimized catalyst (P–MoS 2 /NGA) with more surface active sites exhibited unexpected hydrogen precipitation reaction (HER) activity. A current density of 10 mV cm -2 was achieved in 1.0 M KOH with a voltage of only 79 mV and a Tafel slope dec -1 of 97 mV. Density Functional Theory (DFT) confirms the formation of strong P 2p-S 2p-Mo 3d hybridization at the Fermi energy level, resulting in deeper d-band centers and more optimized hydrogen adsorption sites. Therefore, P–MoS 2 nanosheets/nitrogen-doped graphene 3D hybrid aerogel has great potential to become excellent electrochemical hydrogen precipitation material.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Shuqing Chang,Yan Feng,Yuncai Zhao,Yanghe Fu,Huilin Jia,Yijing Gao,Fumin Zhang,Rui Ma,Xinqing Lu,Maohong Fan,Weidong Zhu
The application of covalent organic frameworks (COFs) for the photocatalytic reduction of CO2 is mostly limited by severe charge recombination and low sunlight utilization. Herein, a triazine-based COF with an electron-rich and large π-conjugated system (TCOF) was employed as a building block and integrated with CuInS2 (CIS) to construct a noble-metal-free and high-efficiency photocatalyst for CO2 reduction. The in situ growth of CIS nanosheets on TCOF creates a p–n heterojunction, named CIS@TCOF. Compared with TCOF, the CIS@TCOF heterostructure exhibits a dramatically boosted photocatalytic performance in the reduction of CO2. The produced HCOOH yield over 10 wt % CIS@TCOF can be up to 171.2 μmol g–1 h–1 under visible light irradiation with good reproducibility, which is about 3 times as high as that over TCOF. Further in-depth studies indicate that the introduction of CIS not only enhances the visible light utilization but also restrains the recombination of photogenerated electron–hole pairs efficiently and facilitates the photoinduced charge transfer via the p–n heterojunction system due to the unique structural and compositional features. This research shows the great potential of COFs as efficient photocatalytic carbon fixation materials and provides a versatile route to construct semiconductor-COF heterostructures for photocatalysis.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Mengdie Yang,Jiabao Zuo,Yanan Pan,Gaifang Lv,Qi Yang,Yang Fan,Fan Qiu,Shupeng Zhang
In this work, a novel flexible electrochemical sensor was successfully developed for the simultaneous determination of p-aminophenol and acetaminophen. The sensor is composed of a methanesulfonic acid-treated poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonic acid) film on a poly(ethylene terephthalate) substrate, which has been modified using a zinc oxide-doped tin oxide heterojunction applied through drop-coating (C-ZnO/SnO 2 -PEDOT/PET). The oxygen vacancies resulting from zinc oxide-doped tin oxide heterojunctions within highly conductive metal oxide nanomaterials enhance mass transfer and synergize seamlessly with methanesulfonic acid-treated electrically conductive dielectric PEDOT/PET films, leading to a substantial improvement in electrochemical activity. Under the optimal conditions, a wider linear range and lower detection limits were shown for p-aminophenol (2–511 μM, LOD=0.437 μM) and acetaminophen (2–591 μM, LOD=0.562 μM). In addition, the sensors demonstrated high accuracy in detecting p-aminophenol and acetaminophen in real samples, with recoveries of 99.36 %-99.60 % and 97.56 %-99.80 %, respectively. Furthermore, the flexible sensors maintained a superior electrochemical response when detecting p-aminophenol and acetaminophen at different bending angles, with relative standard deviations of 0.62 % and 1.68 %, respectively. These findings suggest potential applications for the development of wearable sensors in the future.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Xiaoyue Chen,Guangmin Ren,Yaru Wang,Zizhen Li,Zisheng Zhang,Xiangchao Meng
The synthesis of ammonia through electrocatalytic nitrogen reduction reaction (NRR) under ambient conditions is a presumable strategy. However, it still faces the problems of poor activity and low Faradic efficiency, so the development of efficient, stable and highly selective catalysts is of the importance. Molybdenum disulfide (MoS 2 ) materials are widely used in NRR reactions owing to good electrical conductivity and abundant active sites, but the edge active site is the dual active site of NRR and competitive hydrogen evolution reaction (HER). Encouragingly, the strong interaction between elements in the P-block and N 2p orbitals results in excellent performance in adsorbing and activating nitrogen. Meanwhile, the partial occupation of p-orbitals by elements in the P-block also leads to poor HER activity. Herein, we introduced the P-block element Bi into 1 T-MoS 2 and prepared Bi 2 S 3 /MoS 2 composite. Taking advantage of the high conductivity of 1 T-MoS 2 and the N 2 adsorption and activation advantages of Bi element, an ammonia yield rate of 54.64 µg h −1 mg −1 cat. and a high Faradic efficiency of 58.56 % were obtained. In addition, the active site and the evolution pathway of N 2 reduction were investigated by in-situ infrared spectroscopy measurements and density functional theory (DFT). The in-situ infrared spectroscopy measurement results manifested the presence of the main intermediate transition state during the reduction of N 2 to NH 3 . The calculation results indicated that N 2 had the best adsorption on the introduced P-block element Bi, and the entire NRR reaction process followed an alternating pathway. This study reveals the synergistic effect of P-block elements and transition metal-based electrocatalytic materials on nitrogen reduction to ammonia synthesis .
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Shaowu Yuan,Yihui Wu,Wenjing Chen,Zhanyuan Xu,Yuxin Wang
The development of an efficient yet cost-effective non-precious electrocatalyst for the hydrogen evolution reaction (HER) in alkaline water and seawater systems remains a formidable obstacle to the large-scale production of hydrogen energy, stemming from the sluggish kinetics of electron transfer reactions during the HER process. In this article, an amorphous Co-P-W electrocatalyst on nickel foam is prepared using a brief cyclic voltammetry (CV) electrodeposition method. The optimized Co-P-W electrocatalyst exhibits excellent electrocatalytic performance for HER, which only requires overpotentials of 59 and 143 mV to achieve a current density of 10 mA cm −2 in alkaline water (1.0 M KOH) and alkaline seawater (1.0 M KOH + natural seawater), respectively, and remarkable stability and durability. The improved HER performance of the Co-P-W electrocatalyst is attributed to the introduction of W, which modulates the electronic structure of Co and P, optimizes the adsorption/dissociation of H 2 O, and reduces the charge transfer resistance of the Co-P electrocatalyst, thus improving the kinetics of the HER. Furthermore, the W-doping significantly enhances the hydrophilicity of the Co-P electrocatalyst, which favors rapid and thorough penetration of electrolytes into the electrocatalyst, facilitating the formation of a highly accessible reaction interface, ultimately resulting in excellent HER activity. Our findings demonstrate the feasibility of designing an efficient, durable, and scalable electrocatalyst to significantly boost HER efficiency for practical water electrolysis.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 4
·1-10
·
IF 2.5
Song Wenqiang,Zhao Fengjiao,Xu Changyuan,Wang Qun,Yin Hongming
For photoluminescence (PL) properties of Mn 2+ in glass–ceramics are highly dependent on the concentration of Mn 2+ , we experimentally observed the change of Mn 2+ structures from isolated Mn 2+ ion as a tetrahedron, octahedron to Mn 2+ -Mn 2+ dimer in B-P-Zn-K based glass–ceramics with characteristic PL peaks locating at 504 nm, 600 nm, and 660 nm, respectively. Spectral results reveal that condensed Mn 2+ would lead to redshift of PL emission and reduced Luminous intensity caused by concentration quenching, however, with increasing Mn 2+ content, shift of Mn 2+ structure is the determining factor for PL redshift. Moreover, compared with tetrahedral and octahedral Mn 2+ , Mn 2+ -Mn 2+ dimer exhibits highly enhanced PL emission and shortened life span which reveal that transitions of Mn 2+ -Mn 2+ dimer are far more efficient than those transitions in tetrahedral and octahedral Mn 2+ . This enables tuning of color and efficiency of PL emission for Mn-doped glass–ceramics via a simple method. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
MOLECULAR DIVERSITY
·
2024
·
IF 3.9
Zhou Meng,Duan Xiujie,Jin Tao,Feng Xibing,Liu Ying,Wang Shuo,Feng Jiankang,Zhang Mengtong,Chai Tiantian,Mao Boneng,Shao Shihe,Jin Guofan
Fluorescent drugs and pyrimidine-indole scaffolds have been shown to have advantages in cancer treatment. Fluorescent antitumor drugs BF 3 - o, m, p- phenylenediamine pyrimidine-indole derivatives (PYB1, PYB2, and PYB3) were synthesized by linking pyrimidine and indole groups with aniline through a simple step and introducing BF 3 . The drugs exhibit promising antitumor activity and their fluorescent properties make them useful for imaging purposes. The optical properties of the three compounds have been investigated. All of them have fluorescent properties and compound PYB2 has good fluorescent properties. Additionally, the in vitro cytotoxicity of these compounds was evaluated against the human cancer cell line HeLa and the human normal cell line L02. The inhibition rates of HeLa cells treated with PYB1, PYB2, and PYB3 at a concentration of 19.2 μg/mL were 80.91%, 77.72%, and 65.94%, respectively. These results indicate a strong inhibitory effect on cancer cells. Further through the cell imaging experiment, we can see that PYB2 can enter the cell through the cell membrane through the fluorescence scattering diagram, which has good biocompatibility. In addition, the possible interactions between the compounds and Ras protein active sites were analyzed by molecular docking. The three compounds can bind well to Ras protein through hydrogen bonding. This study provides a basis for the development and modification of pyrimidine-indole fluorescent anticancer drugs. Compound PYB2 shows potential as a fluorescent anticancer drug. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Yujie Liu,Yuting Jiang,Yan Meng,Weini Xiong,Ziling Yuan,Ruihua Liu,Chao Yang
Because the interactions among contaminants may lead to enhanced toxicity, combined pollution caused by the co-presence of multiple contaminants has increasingly gained public concern. p -Nitrophenol (PNP) and 1,2-dichloroethane (1,2-DCA) are frequently co-detected in groundwater. To completely eliminate PNP, 1,2-DCA and intermediates from polluted sites, in this study, a novel degrader KTU-PDG was created by functional assembly of PNP and 1,2-DCA biodegradation pathways in a robust chassis Pseudomonas putida KT2440. Cell growth assay indicated that PNP or 1,2-DCA can be metabolized as a sole carbon source by strain KTU-PDG for cell proliferation. Stable isotope analysis indicated that strain KTU-PDG possesses the capability of co-mineralizing PNP and 1,2-DCA to CO 2 in mineral salt medium. In wastewater bioremediation, the strain KTU-PDG was proven to be capable of co-mineralizing PNP and DCA and maintained high cell viability during bioremediation. Herein, we demonstrate for the first time co-mineralization of PNP and 1,2-DCA by a single strain. Moreover, green fluorescent protein (GFP)-labeling of strain KTU-PDG facilitates estimation of viable cell number and real-time monitoring of cellular activity and transfer by autofluorescence in the environment. These merits of strain KTU-PDG highlight great potential of this degrader for in situ bioremediation of sites co-contaminated with PNP and 1,2-DCA. More importantly, this strategy of multi-pathways assembly in an optimal chassis shows good potential for the clean-up of combined pollution caused by other organic pollutants.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Dengjie Luo,Wei Wang,Wuwei Feng,Shuo Liu,Bin He,Yuqin Liu
To meet the rising demand for energy storage, it is essential to achieve further improvements in the energy storage density and efficiency of composites based on dielectric polymers. Herein, Boron nitride nano sheets (BNNS) with high breakdown strength and high thermal conductivity was introduced into the matrix of polyvinylidene fluoride hexafluoropropylene (P (VDF-HFP)). Via synchronous heating and stirring treatment, BNNS were well dispersed in P(VDF-HFP) with increased fluidity due to the rise of temperature. With the incorporation of 7 wt% BNNS, the composite achieved high energy storage density of 21 J/cm 3 at 492 MV/m and high efficiency of 80.2 % concurrently, outperforms most previous polymer-based composite dielectric energy storage materials. This is attributed to the fact that BNNS can induce the formation of P(VDF-HFP) crystalline phase , and the simultaneous heating process improves filler dispersion to extend the breakdown path and disperse electron heat accumulation.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）