ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Jiangzhou Qin,Baojun Liu,Kwok-Ho Lam,Shijie Song,Xinyong Li,Xia Hu
To improve the photocatalytic efficiency of the N2 reduction reaction, MXene quantum dots (Ti3C2-QDs) and two-dimensional (2D) nickel metal–organic framework (Ni-MOF) with different ratios were fabricated by a simple self-assembly strategy to form type II heterojunctions. The resultant composites showed enhanced absorption and excellent interfacial charge-transfer capabilities according to the optical and photoelectron properties. The optimal Ti3C2-QD/Ni-MOF heterostructure exhibited a considerable ammonia yield rate (88.79 μmol gcat–1 h–1). By means of X-ray absorption near-edge fine structure (XANES) technique, it was found that the interaction of Ti3C2-QD and Ni-MOF could accelerate the electron transfer, and Ni site would be the main area to enrich the electron density as well as adsorb and activate N2. Finally, with the aid of density functional theory (DFT) calculations and in situ Fourier transform infrared spectrometry (FTIR), the reaction pathway and intermediate products were studied.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2020
·
IF 5.578
Run-Ping Ye,Lin Liao,Tomas Ramirez Reina,Jiaxu Liu,Durgaiah Chevella,Yonggang Jin,Maohong Fan,Jian Liu
The CO 2 methanation is an important process in coal-to-gas, power-to-gas and CO 2 removal for spacecraft. Recently, metal-organic framework (MOF) derivatives have been demonstrated as high-performance catalysts for CO 2 upgrading processes. However, due to the high costs and low stability of MOF derivatives, it still remains challenge for the development of alternative synthesis methods avoiding MOF precursors. In this work, we present the sol-gel method for loading Ni-MOF to silica support in two-steps. Upon modifying the procedure, a more simplified one-step sol-gel method has been developed. Furthermore, the obtained Ni/SiO 2 catalyst still exhibits great catalytic performance with a CO 2 conversion of 77.2% and considerable CH 4 selectivity of ~100% during a stability test for 52 h under a low temperature of 310 °C and high GHSV of 20,000 mL·g −1 ·h −1 . Therefore, this work provides a ground-breaking direct strategy for loading MOF derived catalysts, and might shed a light on the preparation of highly dispersed Ni/SiO 2 catalyst.
研究领域:
化学工程
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Siyue Zhang,Lin Zhu,Zheng Ai,Baoli Wang,Ahmad Mansoor,Yan Zhang,Wei Sun
By using carbon nanotube (CNT) as the carrier, Ni as the active center and ZrO 2 as the modifier, an efficient electrocatalytic material (ZrO 2 -Ni/CNT) is designed and synthesized in this paper. The structure and properties of the catalyst are characterized by various instrumental analysis methods such as SEM, TEM, XRD and XPS. The electrochemical test results show that the addition of ZrO 2 can significantly improve the catalytic performance of this catalyst in the electrochemical water splitting. In an alkaline solution, ZrO 2 -Ni/CNT catalyst displays an exceedingly low overpotential of 169 mV and 249 mV at the current density of 10 mA cm −2 towards hydrogen evolution reaction and oxygen evolution reaction, respectively. This work shows that the modification of ZrO 2 can improve the electrocatalytic activity of Ni-based materials, and the modification strategy can be applied to improve the electrocatalytic activity of commercial Ni-based electrode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2021
·
IF 5.467
Atian Xie,Jiuyun Cui,Jin Yang,Chunxiang Li,Yi Wang,Jiangdong Dai
The effective treatment of oily wastewater is of great significance for the protection of the ecological environment and human health. Aiming to prepare a membrane with excellent antifouling properties, a new active antifouling carbon cloth@Ni-Co LDH/Ag (CC@LDH/Ag) membrane was reported here via in situ hydrothermal growth and followed photo-deposition methods. The effects of Ag deposition on self-cleaning ability and surface wettability of CC@LDH/Ag membrane were studied. The experimental results showed CC@LDH/Ag membrane is superhydrophilic/underwater superoleophobic, and exhibited high separation efficiency (>98.6%) and high flux (6551–22,050 L m −2 h −1 ) for different kinds of oil/water mixtures. Moreover, CC@LDH/Ag membrane also displayed excellent environmental and mechanical durability. Good self-cleaning ability enabled CC@LDH/Ag membrane to be separated at least 30 times, and still maintained high separation performance. The self-cleaning CC@LDH/Ag membrane may hold great application prospects in oily wastewater remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Shasha Zheng,Huijie Zhou,Huaiguo Xue,Pierre Braunstein,Huan Pang
The poor conductivity, unsatisfactory stability and easy aggregation of metal–organic framework (MOF) nanomaterials have been recognized as the main reasons that prevent their practical application. Here, we report the highly conductive and cyclic-stable Ti 3 C 2 MXene@pillared-layer [Ni(thiophene-2,5-dicarboxylate)(4,4′-bipyridine)] n MOF composites (MXene@Ni-MOF). Based on the hard-soft-acid-base principle, the pillared-layer Ni-MOF porous structure with Ni-N coordination bonds confer better structural stability. The Ni-MOF nanosheets are immobilized by the MXene , leading to fast charge transfer between the Ni-MOF and MXene, solving the problem of poor conductivity of Ni-MOF, while avoiding the agglomeration of Ni-MOF nanosheets. Moreover, the strong interaction between the organic ligands of Ni-MOF and surface functional groups of MXene plays a key role: it reduces the exposure of surface groups of MXene, limits the oxidation of MXene, and increases its layer spacing, thus facilitating the rapid ion transport. The MXene@Ni-MOF exhibits a high specific capacitance (979 F g −1 at 0.5 A g −1 ) and the new aqueous asymmetric supercapacitor device displays an excellent cycling property with only 2% decay after 5000 cycles.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Guo-Cui Mao,Jin-Peng Wang,Hui-Lin Jiang,Bao-Xia Dong,Yun-Lei Teng
We found that the activated LiBH 4 or Ni/LiBH 4 can effectively assist CO 2 hydrogenation into C1 and C2 products at low temperature (100–300 ℃). After CO 2 hydrogenation over the activated LiBH 4 or Ni/LiBH 4 , CH 4 with approximately 100 % selectivity was formed in the gas phase products. CH 3 OH, HCOO − , and high-value CH 3 CH 2 OH were observed in aqueous solution of spent LiBH 4 or Ni/LiBH 4 after CO 2 hydrogenation. CO 2 conversion and CH 4 production are able to be further improved by doping 5–20 wt% Ni into the activated LiBH 4 . The LiBH 4 sample shows a 61.34 % CO 2 conversion at 200 ℃, while the 20 %Ni/LiBH 4 composite displays an 80.14 % CO 2 conversion under the same conditions. The experimental and theoretical results suggest that the synergistic effect from Ni and LiBH 4 results in high CO 2 conversion at low temperature. This new method for CO 2 conversion to C1, C2 products using the activated Ni/LiBH 4 composite may enlighten the materials design for CO 2 utilization.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Jiaxing Hou,Guohao Zou,Xinrui Liu,Mingge Li,Pengyu Yang,Xiaobin Zhang,Yan Chen,Qian Zhang,Xiaoping Wu,Tiejun Wang
The one-step hydrothermal reconstruction of bioethanol into higher alcohols represents a pivotal advancement in green chemistry, addressing both environmental sustainability and energy regeneration. Herein, a rational design of Ni@C-CeO2 catalysts via a sol–gel method for efficient aqueous-phase ethanol C–C coupling was reported. Systematic investigation of Ni loading and precursor carbonization temperature revealed their critical roles in modulating catalyst microstructure and performance. The optimized Ni-2@C-CeO2-500 catalyst demonstrated exceptional activity under 190 °C and 12 h, achieving ethanol conversion of 72.0% and C4+ alcohol yield of 55.6%. Advanced characterization techniques unveiled structure-performance relationships: (1) controlled Ni loading ensured optimal nanoparticle dispersion, while excessive loading induced aggregation; (2) carbonization at 500 °C balanced carbon matrix architecture and CeO2 reducibility. XPS analysis revealed that oxygen vacancy concentration critically modulates strong metal–support interactions through Ce3+-induced charge redistribution, facilitating interfacial electron transfer during reaction. Furthermore, the Ni-2@C-CeO2-500 catalyst demonstrated excellent stability with sustained activity retention over five consecutive cycles. This work establishes a renewable and technologically viable alternative to conventional petroleum-derived chemicals widely utilized in the chemical industry, demonstrating significant potential for applications in green and sustainable chemistry.
研究领域:
绿色化学
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催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2021
·
IF 3.383
Xiao-Hui Yang,Kai-Fei Wang,Kuo-Chih Chou,Guo-Hua Zhang
Fine grained WC-Co-Ni cemented carbides with a low binder content have been successful manufactured via the powder metallurgy method. The WC-Co-Ni composite powder with homogeneous distributions of Co and Ni was synthesized by chemical co-precipitation with the raw materials of WC powder, oxalic acid and chlorides of Co and Ni. In this study, the effects of cobalt and nickel contents on the properties of cemented carbides were investigated systematically. The experimental results demonstrated that the alloy prepared by vacuum sintering had uniform grain size distribution and no abnormal growth of WC grains. When the cobalt content was 4 wt% and 5 wt%, the obtained composites almost completely consolidated with excellent hardness and fracture toughness. Among them, for the sample WC-4 wt%Co, the relative density could reach 99.37%, and the Vickers hardness and fracture toughness were 2010 HV 30 and 8.55 MPa·m 1/2 , respectively. When Ni was added to replace part of Co, the relative density of WC-Co-Ni decreased and the fracture toughness was improved without basically sacrificing the hardness. For the sample WC-2 wt%Co-2 wt%Ni, the hardness decreased to 1921 HV 30 , while the fracture toughness increased to 8.97 MPa·m 1/2 .
研究领域:
材料科学
·
粉末冶金
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 3
·493
·
IF 5.3
Meng Shao,Jun Li,Jing Li,Yanan Yan,Ruoliu Li
Honeycomb-like Ni(OH)2/Ni3S2/Ni foam (NF) was fabricated via a two-step hydrothermal process and subsequent alkalization. Ni3S2with a honeycombed structure was in-situ synthesized on the NF surface by a hydrothermal process. MOF-derived Ni(OH)2nanosheets were then successfully grown on the Ni3S2/NF surface by a second hydrothermal process and alkaline treatment, and a large number of nanosheets were interconnected to form a typical honeycomb-like structure with a large specific surface area and porosity. As a binder-free electrode, the prepared honeycomb-like Ni(OH)2/Ni3S2/NF exhibited a high specific capacitance (2207 F·g−1at 1 A·g−1, 1929.7 F·g−1at 5 mV·s−1) and a remarkable rate capability and cycling stability, with 62.3% of the initial value (1 A·g−1) retained at 10 A·g−1and 90.4% of the initial value (first circle at 50 mV·s−1) retained after 5000 cycles. A hybrid supercapacitor (HSC) was assembled with Ni(OH)2/Ni3S2/NF as the positive electrode and activated carbon (AC) as the negative electrode and exhibited an outstanding energy density of 24.5 Wh·kg−1at the power density of 375 W·kg−1. These encouraging results render the electrode a potential candidate for energy storage.Keywords:Ni(OH)2/Ni3S2/NF;honeycomb-like structure;two-step hydrothermal;alkalization;MOF-derived Ni(OH)2;supercapacitor
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Guixian Deng,Guifang Zhang,Xing Zhu,Qingjie Guo,Xiangbiao Liao,Xi Chen,Kongzhai Li
Reduction of CO 2 in presence of oxidative impurity ( e.g. , O 2 ) is more promising than utilization of pure CO 2 due to skyrocketing cost for purification of captured CO 2 from air or industrial exhaust gas. In this work, Ni-based catalysts are modified by CeO 2 and ZrO 2 to suppress negative effect of O 2 on reforming of CO 2 with methane, which show high CH 4 conversion (97 %) and CO 2 conversion (95 %) at 750 °C and can maintain high CO 2 conversion even with high O 2 content. The physicochemical characterizations on fresh and spent catalysts show that the interaction among Ni, CeO 2 and ZrO 2 results in well dispersion of smaller Ni particles, even after long-term testing. In situ DRIFTS results show that Ni/CeO 2 -ZrO 2 -SiO 2 catalyst shows advantage to activate CH 4 to generate active CH 3 *, promoting the formation of CO, and the CeO 2 -ZrO 2 solid solution improves the CO 2 adsorption, thereby reducing the competitive effect of CO 2 and O 2 .
研究领域:
化学工程
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2023
·
IF 8.4
Jiaji Zhang,Gaobo Lin,Jie Zhu,Sifan Wang,Wenhua Zhou,Xiangzhou Lv,Bolong Li,Jianghao Wang,Xiuyang Lu,Jie Fu
Graphical We find that the N-doped Ni particles can enhance the adsorption of CO 2 and modulate the configuration of adsorbed CO on Ni-N-C sites. As a result, the optimal catalyst can efficiently convert CO 2 into CO with a faradaic efficiency of 96.7 % and a current density of 500 mA cm −2 in a strongly acidic electrolyte. Electro-chemically reducing CO 2 in a highly acidic medium is promising for addressing the issue of carbonate accumulation. However, the hydrogen evolution reaction (HER) typically dominates the acidic CO 2 reduction. Herein, we construct an efficient electro-catalyst for CO formation based on a core-shell structure, where nitrogen-doped Ni nanoparticles coexist with nitrogen-coordinated Ni single atoms. The optimal catalyst demonstrates a significantly improved CO faradaic efficiency (FE) of 96.7 % in the acidic electrolyte (pH=1) at an industrial-scale current density of 500 mA cm −2 . Notably, the optimal catalyst maintains a high FE of CO exceeding 90 % (current density=500 mA cm −2 ) in the electrolyte with a wide pH range from 0.67 to 14. In-situ spectroscopic characterization and density functional theory calculations show that the local electron density of Ni-N-C sites is enhanced by N-doped Ni particles, which facilitates the formation of *COOH intermediate and the adsorption of *CO. This study demonstrates the potential of a hybrid metal/Ni-N-C interface in boosting acidic CO 2 electro-reduction.
研究领域:
材料科学
·
电化学
·
催化反应
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 52
·46270-46277
·
IF 3.289
Wei Shao,Jimin Wu,Hui Liu,Guanghui Dong,Shuxia Wang,Huihua Min,Min Huang
Bacterial adhesion on the surfaces of medical devices, food processing equipment, heat exchangers and ship hulls has been recognized as a widespread problem. Bacterial adhesion on a surface is influenced by surface physical and chemical properties of the surface. In this paper, polyethyleneimine (PEI) grafted graphene oxide (GO) nanosheets were incorporated into Ni–P coatings by an electroless plating technique to modify the surface energy, and therefore to influence the interactions between the prepared surfaces and the tested bacteria. Ni–P–GO coatings were investigated by SEM, AFM, Raman spectrum and XPS. Contact angles of Ni–P–GO coatings with different GO loadings were tested and the surface free energies and their dispersive and polar components were calculated using the van Oss acid–base approach. The results showed that the surface free energies of the coatings had a significant influence on S. aureus adhesion. The Ni–P–GO coatings showed excellent antibacterial adhesion activity. Extended DLVO theory is used to explain the antibacterial adhesion behavior. The novel coatings reported here can be used in controlling bacterial adhesion and biofilm formation for various applications.
研究领域:
材料科学
·
微生物学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）