APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Qiong Lin,Yue-Hua Li,Ming-Yu Qi,Jing-Yu Li,Zi-Rong Tang,Masakazu Anpo,Yoichi M.A. Yamada,Yi-Jun Xu
The photocatalytic coupling reaction can be conducted in one pot to realize the simultaneous utilization of electrons and holes, thereby obtaining value-added fine chemicals and fuels. Herein, we report a binary nickel modified ZnIn 2 S 4 (Ni:ZIS) for highly efficient photocatalytic selective oxidation of benzyl alcohol (BA) to benzaldehyde (BAD) integrated with hydrogen (H 2 ) evolution, in which Ni can promote photogenerated charge transfer for enhancing photoactivity. Particularly, the products of converting BA to aromatic compounds over blank ZnIn 2 S 4 (ZIS) and Ni:ZIS show a marked difference under the same reaction conditions. Hydrobenzoin (HB) is the primary product over blank ZIS. After the introduction of Ni, the formation of HB is dramatically suppressed, resulting in higher selectivity of BAD, because the introduction of Ni facilitates the α-H abstraction. In addition, an analogous phenomenon has been observed on Ni-based compounds modified ZIS, such as Ni x P and NiS. It is hoped that this work would provide a feasible paradigm for modifying the surface of photocatalysts to tune the selectivity of product-oriented alcohols oxidation coupled with H 2 evolution in water.
研究领域:
化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2025
·
IF 3.8
Gaofeng Shao,Yu Sun,Gaoyuan Yu,Weiquan Huang,Liqun Guo,Xiaogu Huang
Polymer-derived ceramics (PDCs), known for their exceptional thermal stability and adjustable dielectric characteristics, show great promise in electromagnetic wave absorption applications under extreme temperature conditions. Their multiphase and multi-heterointerface structures also enable effective low-frequency absorption for 5G applications, a crucial yet underexplored capability. In this study, nickel-modified SiCN (SiCN/Ni) ceramics were synthesized through coordination crosslinking of trace amounts of nickel-based metal-organic framework (Ni-MOF) with polysilazane precursor, followed by high-temperature pyrolysis. The investigation reveals that Ni-MOF enables the formation of both dielectric and magnetic loss components, specifically SiC nanocrystals, free carbon, and Ni 2 Si nanocrystals, during the synthesis process at reduced temperature conditions. The coexistence of electromagnetic-transparent and absorbing phases enhances impedance matching. The heterogeneous nanodomains create multiple interfaces, induce significant lattice strain, and produce abundant structural defects, which together enhance interfacial and dipole polarization effects. Notably, the optimized SiCN/Ni ceramic exhibits exceptional microwave absorption performance at low frequency, achieving a minimum reflection loss of –46.1 dB at 5.28 GHz. The low-frequency absorption bandwidths reach 0.76 and 1.0 GHz at thicknesses of 4.0 and 5.0 mm, fully covering both the n 78 band (3.3–3.8 GHz) and n 79 band (4.4–5.0 GHz) used in 5G communications. These findings present new opportunities for developing advanced lower-frequency absorbers based on dielectric PDCs.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2024
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IF 2.7
Shufeng Lin,Zhonghua Sun,Zhenzhen Wang,Qiumin Zhou,Anwei Wang,zhong wu,Junfeng Qian,Ming-Yang He,Qun Chen
Bisphenol A (BPA) is ubiquitous in industrial production and daily life. However, BPA is harmful to the health of fetuses and children due to its potential endocrine-disrupting effects. Hydrogenated bisphenol A (HBPA), an alicyclic diol generated from hydrogenating the double bonds of two benzene rings in the BPA molecule, is supposed to be a perfect substitute for BPA due to its stability and non-toxicity. Nevertheless, the rational design of high-performance catalysts for selectively converting BPA into HBPA remains a significant challenge. In this work, highly dispersed Ru immobilized by Al2O3 modified with Ni promoter (Ru/Ni-Al2O3) have been constructed, enabling BPA selective hydrogenation to produce HBPA under mild conditions. The doping of Ni promoter around Ru active sites effectively regulated the selectivity of target reaction. Both characterization and experimental results validated that the Ni promoter manipulated the electronic state of Ru through strong electron interaction between Ni and Ru, and thus the catalytic performance. In addition, the catalytic performance was also dependent on other reaction parameters such as H2 pressure, reaction temperature, liquid hourly space velocity (LHSV), and hydrogen-oil volume ratio. The optimized Ru/0.1Ni-Al2O3 catalyst achieved a BPA conversion of 100% and an HBPA selectivity of 96.4% under optimal reaction conditions (6 MPa H2, 140 oC, 0.42 h-1 LHSV, and 1500:1 hydrogen-oil volume ratio).
研究领域:
催化化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2018
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IF 3.974
Xiaonuo Zhang,Xiaoyan Lin,Hanlin Ding,Yu He,Hao Yang,Yan Chen,Xiaoyan Chen,Xuegang Luo
The extensive occurrence of antibiotics (such as ciprofloxacin) in aqueous environment had raised severe concerns due to their impacts on humans and the ecosystem. In this study, a novel nickel alginate particles adsorbent had been successfully developed by combining an alginate matrix with nickel ion through immobilization and crosslinking technology and then was applied for the batch adsorption study of ciprofloxacin to evaluate its potential performance. The as-prepared adsorbent exhibited excellent adsorption performance at the condition of the pH 7 and 328.15 K, and the results indicated that the maximum adsorption capacity was 135.18 mg g −1 . The isotherm and kinetic studies were well fitted to the Langmuir and pseudo-second-order models, respectively. A thermodynamics analysis displayed that the ciprofloxacin adsorption process was endothermic, feasible and spontaneous. The as-prepared adsorbent before and after adsorption was characterized through SEM, EDX and XPS analyses, and the particle size of the as-prepared adsorbent was roughly 914 µm. Hydrogen bond , the cation bonding bridge and n-π electron-donor-acceptor interaction might be the driving force of the ciprofloxacin adsorption process. This study demonstrated that this as-prepared adsorbent was a promising and efficient material for the ciprofloxacin adsorption from the aqueous solution.
研究领域:
环境科学
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材料科学
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药物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Xinyu Chen,Jiexi Song,Yifei Xing,Yanqing Qin,Jianbin Lin,Xiao Qu,Bianjing Sun,Shiyu Du,Diwei Shi,Chuntao Chen,Dongping Sun
Designing transition metal-oxide-based bifunctional electrocatalysts with excellent activity and stability for OER/HER to achieve efficient water splitting is of great importance for renewable energy technologies. Herein, a highly efficient bifunctional catalysts with oxygen-rich vacancies of nickel-decorated RuO 2 (NiRuO 2−x ) prepared by a unique one-pot glucose-blowing approach were investigated. Remarkably, the NiRuO 2−x catalysts exhibited excellent HER and OER activity at 10 mA cm −2 in alkaline solution with only a minimum overpotential of 51 mV and 245 mV, respectively. Furthermore, the NiRuO 2−x overall water splitting exhibited an ultra-low voltage of 1.6 V to obtain 10 mA cm −2 and stability for more than 10 h. XPS measurement and theoretical calculations demonstrated that the introduction of Ni-dopant and oxygen vacancies make the d-band center to lie close to the Fermi energy level, the chemical bonds between the active site and the adsorbed oxygen intermediate state are enhanced, thereby lowering the reaction activation barriers of HER and OER. The assembly of solar-driven alkaline electrolyzers facilitate the application of the NiRuO 2−x bifunctional catalysts.
研究领域:
材料科学
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可再生能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2018
·Vol. 165
·期 2
·F75
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IF 3.662
Yunfeng Zhan,Fangyan Xie,Hao Zhang,Zhipeng Lin,Jilin Huang,Weihong Zhang,Xueliang Sun,Hui Meng,Yueli Zhang,Jian Chen
A highly active and stable bifunctional electrocatalyst for oxygen evolution reaction (OER) and hydrogen evolutionreaction (HER) in alkaline media based on Ni-doped Mo2C-MoN particles supported on porous N-doped graphitic carbon is studied in this work. The optimized Mo2C-MoN/Ni@NC catalyst shows small over potential of 296 mV and 183 mV at 10 mA cm−2 on glassy carbon electrode for OER and HER, respectively. The best catalyst is the mixture of hexagonal Mo2C, MoN and metallic Ni. The high catalytic performance is explained by the synergistic effect between metallic Ni and Mo compounds. The promotion effect of Ni to Mo2C-MoN leads to high OER activity and Mo2C is crucial for HER. The good stability and easily scale-up make the Mo2C-MoN/Ni@NC a promising bifunctional catalyst for water splitting in alkaline media.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2017
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IF 5.951
Lin Miao,Yi-Zhou Zhu,He-Fang Wang
We presented the first exploration of the easily prepared nickel-decorated magnetic Fe3O4 nanoparticles as recyclable nanosized magnetic self-stirring catalysts for microdroplet reactions. The cross-linked polymer poly(cyclotriphosphazene-co-4,4′-sulfonyldiphenol) (PZS) was used as the intermediary to link Fe3O4 and anchored nickel nanodots. On the basis of the charming magnetic feathers of Fe3O4 and the fine catalysis activity of Ni, the Fe3O4@PZS-Ni nanoparticles could not only self-stir or make the reactants move along the tiny channels with the help of the external rotating magnetic field but also exhibit high catalysis activity and convenient recyclability. The Fe3O4@PZS-Ni nanoparticles have the merits of small size, good suspension, easy fabrication, and most importantly, superior flexibility and adaptability to any shape of the microreactors or nanoreactors; thus, they may bring new inspiration for self-stirring catalytic reactions in micro/nanochips or micro/nanobiological tubules or tissues.
研究领域:
材料科学
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化学工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
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2017
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IF 10.614
Sai Chen,Liang Zeng,Hao Tian,Xinyu Li,Jinlong Gong
Partially oxidizing methane into syngas via a two-step chemical looping scheme is a promising option for methane transformation. Providing the optimum lattice oxygen to selectively produce syngas represents the major challenge for the development of oxygen carrier materials in chemical looping processes. This paper describes the design of WO3-based oxygen carriers as the primary source of lattice oxygen with high melting points and attractive syngas selectivity. To further enhance the lattice oxygen availability and methane conversion capacity, NiO nanoclusters are introduced, considering the doping effect on chemical bonding disruption in both bulk and surface regions. For Ni0.5WOx/Al2O3, the nickel cations incorporated into the bulk of WO3 can strongly weaken the tungsten–oxygen bond strength and increase the availability of lattice oxygen. The surface-grafted nickel species can effectively activate methane molecules and catalyze the partial oxidation reaction. Total methane conversion and syngas yield can be substantially increased by about 2.7-fold in comparison with unmodified WO3/Al2O3. This work demonstrates that the bulk and surface modifications are feasible to tailor the active lattice oxygen of oxygen-carrying materials in chemical looping processes.
研究领域:
催化化学
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能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2022
·
IF 3.898
Youwei Yang,Jingyu Zhang,Yueqi Gao,Busha Assaba Fayisa,Antai Li,Shouying Huang,Jing Lv,Yue Wang,Xinbin Ma
The efficient hydrogenation of CO 2 -derived ethylene carbonate (EC) to yield methanol (MeOH) and ethylene glycol (EG) is a key process for indirect conversion of CO 2 to MeOH. However, a high H 2 /EC molar ratio during the hydrogenation process (usually as 180–300) is generally required to achieve good catalytic performance, resulting in high cost and energy consumption for H 2 circulation in the promising industrial application. Here, we prepared a series of Ni-modified Cu/SiO 2 catalysts and explored the effects of synthesis methods and Ni contents on catalytic performance under different H 2 /EC molar ratios. The Cu/SiO 2 catalyst with 0.2% (mass) Ni loading prepared by co-ammonia evaporation method exhibited above 99% conversion of EC, 91% and 98% selectivity to MeOH and EG respectively at H 2 /EC ratio of 60. And no significant deactivation was observed within 140 h at a lower H 2 /EC of 40. It is demonstrated that a few of Ni addition could not only promote Cu dispersion and increase surface Cu + species due to the strong interaction between Cu and Ni species, but also form uniformly-dispersed CuNi alloy species and thus enhance the adsorption and dissociation of H 2 . But the excess Ni species would aggregate and segregate to cover partial surface of Cu nanoparticles , leading to a significantly drop of catalytic performance in EC hydrogenation. These insights may provide guidance for further design of catalysts for the ester hydrogenation reactions.
研究领域:
催化化学
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材料科学
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环境科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Rongyu Xu,Tong Zhou,Mengyao Tian,Haoran Li,Shen Xu,Yuchen Yang,Yaru Zhang,Jinming Ma,Tifeng Jiao
Covalent organic framework (COF) materials, with their remarkable conjugated systems and layered structures, have remained a research focus in the field of photocatalysis in recent years. Incorporating co-catalysts into COFs materials is regarded as a simple and effective strategy to address the serious issue of photogenerated carrier recombination faced by COF-based catalysts. In particular, noble metal co-catalysts can significantly enhance photocatalytic efficiency. However, due to the high cost of noble metals, they are not suitable for long-term and widespread applications. As a result, non-noble metal co-catalysts with low cost and excellent catalytic performance have garnered significant attention. In this study, a non-noble metal Ni-modified COF composite catalyst (Ni/COF) was successfully prepared by loading Ni-based metal salts onto the surface of β-ketoenamine COF (TAPB-Tp-COF) through in situ photodeposition method. The addition of the Ni co-catalyst significantly enhanced the catalytic performance to 0.54 mmol/g·h, which is 4.3 times that of pure TAPB-Tp-COF. This work provides a new approach for constructing economical, clean, and efficient photocatalytic systems.
研究领域:
材料科学
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能源化学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Qianqian Song,Junqi Li,Beiyi Zhang,Hu Li,Xiaoxu Liu
Despite the challenges on tuning the d-band structure of transition metals , the d-band is of great importance for promoting the interaction between catalytic and intermediates during the oxygen evolution reaction (OER) process. Herein, ultrafine Co nanoparticles embedded in the surface layer of nitrogen-doped carbon microspheres are prepared through an in-situ co-coordination strategy, and its d-band is modulated by introducing different Ni amounts. The introduction of Ni in the Co crystal lattice can tune the d-band center and unpaired electrons, which collectively result in an enhancement of OER activity and kinetics. By investigating the catalysts with Ni content from 0% to 75%, it is concluded that the catalyst with 25% Ni shows optimal OER activity, lower overpotential (285 mV at 10 mA cm −2 ) and higher current densities (73.75 mA cm −2 at 1.63 V). Moreover, the good stability is also demonstrated with the negligible decrease on current densities after 3000 CV cycles or 100 h of continuous test in alkaline media. This concept of modulating the d-band structure by introducing a transition metal with different contents in another transition metal crystal lattice could present an alternative pathway to the development of highly active catalytic materials for OER and beyond.
研究领域:
材料科学
·
电催化
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2015
·
IF 4.772
Jinsong Shi,Weibin Li,Dan Li
Porous carbons are important adsorbents for hydrogen. In this work mesoporous carbon material with ultrahigh surface area is prepared with hexagonally packed mesoporous silica (HMS) as template. After a systematic optimization of different synthesis parameters, carbon material with a specific surface area of 2644 m2/g is obtained with resol as carbon precursors, the highest value reported so far for silica-templated mesoporous carbons. The material can be loaded with nickel nanoparticles through addition of nickel chloride hexahydrate into the resol solution. Hydrogen uptake of the nickel-decorated carbon at room temperature and 20 bar reaches 2.66 mmol/g, 78% higher than that of the pristine carbon. Due to the sharp decrease of the specific surface area and pore volume after nickel decoration, the improvement is attributed to effects of nickel nanoparticles.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）