Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 8
·2301-2312
·
IF 6.367
Xueying Qiu,Jiaxi Liu,Shujun Qiu,Pengru Huang,Hailiang Chu,Yongjin Zou,Huanzhi Zhang,Fen Xu,Lixian Sun
It is a very challenging task to develop high-performance metal catalysts for hydrolytic dehydrogenation of ammonia borane (AB, NH3BH3). In this work, cobalt–nickel layered double oxide (CoNi-LDO) with a sea urchin-like structure is prepared through the calcination of its corresponding layered double hydroxide (CoNi-LDH). As a catalyst support, ruthenium nanoparticles are loaded on CoNi-LDO by chemical reduction to form Ru/LDO catalysts. The effect of the reduction method (i.e., liquid-phase reduction and gas-phase reduction) and the auxiliary reagent citric acid (CA) on their catalytic properties for hydrogen production from AB hydrolysis is systematically studied. It takes only about 85 s at room temperature for the completion of AB hydrolysis in the presence of the as-prepared Ru-CA/LDO-G catalyst, which exhibits a much lower activation energy (Ea = 25.94 kJ mol−1) and relatively higher activity (TOF = 501.4 molH2 molRu−1 min−1). These experimental results are further confirmed by theoretical calculations, during which there is strong adsorption of AB molecules and easy activation of water molecules on Ru/LDO-G. Therefore, Ru/CoNi-LDO as a catalyst exhibits potential application in the field of hydrogen evolution from hydrolysis of hydroborates such as AB and NaBH4.
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高影响因子
RENEWABLE ENERGY
·
2020
·
IF 6.274
Guanyi Chen,Juping Liu,Xiangping Li,Jianguang Zhang,Han Yin,Zhenping Su
In this work, HZSM-5, Al-SBA-15 and Al-SBA-15/HZSM-5 were adopted as supporting materials for the nickel-based catalysts used in hydrodeoxygenation process. Incipient wetness impregnation method was employed to load nickel species onto these materials. The physicochemical characterization was carried out using advanced instruments. The effect of composition of nickel-based catalysts on hydrodeoxygenation (HDO) reaction was studied. Support materials of nickel-based catalyst have a significantly impact on HDO activity. The highest selectivity (67.9%) of propyl-cyclohexane was obtained over nickel based Al-SBA-15/HZSM-5 catalyst, and nearly all the eugenol was completely hydrodeoxygenated after reaction. The impact of light fractions existed in bio-oil on phenols upgrading process was investigated. The conversion of eugenol mixed with light fractions reached nearly 100% for all the reactions. Eugenol mixed with light fractions as reactant could reduce ring break reaction during hydrodeoxygenation process. The selectivity of alkanes remained nearly unchanged after adding ethylene glycol into the reactant. However, the selectivity of propyl-cyclohexane was significantly decreased by mixing furfural or acetic acid with eugenol as reactant.
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高影响因子
Molecular Catalysis
·
2020
·
IF 3.687
Na Ji,Zhenyu Liu,Xinyong Diao,Jinrong Bao,Zhihao Yu,Chunfeng Song,Qingling Liu,Degang Ma,Xuebin Lu
GVL (γ-valerolactone) is identified as an important biomass platform molecule due to its wide application. In this work, a series of novel supported Ni catalysts with different supports and Ni loading were synthesized via metal-organic chemical vapor deposition (MOCVD) method for the hydrogenation of EL (ethyl levulinate) to GVL. Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), nitrogen adsorption/desorption, inductively coupled plasma optical emission spectroscopy (ICP-OES) and transmission electron microscopy (TEM) were used to characterize the as-synthesized catalysts. The results showed that the 2 wt.% Ni/AC(MOCVD) presented superior catalytic activity when compared with the catalyst prepared by impregnation method. This behavior is explained in terms of the smaller Ni nanoparticles (4.28 nm) and higher dispersion on 2 wt.% Ni/AC(MOCVD). Among the catalysts, the 2 wt.% Ni/AC catalyst exhibited the best catalytic performance with 99.7 % EL conversion and 79.8 % GVL yield under 1 MPa initial H 2 pressure (measured at room temperature) at 250 °C for 2 h. In addition, the reaction conditions were optimized and the stability of the catalyst were also investigated. The insights gained from this study in the design of high dispersed Ni particles with smaller particle size via MOCVD method will facilitate the metal-catalyzed hydrogenation of EL to GVL.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Hongming Zhang,Guangcheng Zhang,Qiang Gao,Meng Tang,Zhonglei Ma,Jianbin Qin,Mingyue Wang,Jang-Kyo Kim
Lightweight and multifunctional polyvinylidene fluoride/Nickel-chains (PVDF/Ni-chains) composite foams with good mechanical property, excellent thermal insulation and outstanding electromagnetic interference (EMI) shielding performance (SE) were prepared by a multi-step process including: (a) controllable synthesis of high-aspect-ratio Ni-chains, (b) Ni-chains introduced into PVDF matrix, (c) crystallinity tailoring of composite samples, (d) supercritical carbon dioxide foaming of the treated composites. Thermal treating and nanofiller existence effect are applied to tune the degree of crystallinity and crystal structures of semi-crystalline PVDF. Notably, with the optimized pre-treatment and foaming process, lightweight PVDF/Ni-chains composite foams with uniform closed-cell microcellular morphology were successfully developed. Thanks to the unique porous morphology, PVDF/10 wt% Ni-chains foams present decreased mass density (~1.0 g/cm 3 ), high tensile strength (~42.0 MPa), enhanced electrical conductivity (~0.01 S/m) and superior thermal insulation performance (~0.075 W/(m·K)). Furthermore, conductive-magnetic PVDF/10 wt% Ni-chains foam exhibits a high EMI shielding effectiveness of 26.8 dB and an outstanding specific shielding effectiveness (SSE) of 127.62 dB cm 2 /g, with an absorption-dominated shielding feature in X-band region. The enhanced absorption is attributed to the multiple reflections, dielectric loss, polarization loss and magnetic loss originated from the unique porous structure and condensed Ni-chains networks. This study paves a low-cost and scalable method for the design of novel, lightweight, thermal insulation and efficient EMI shielding composite foams characterized by optimized microcellular structure and conductive-magnetic Ni-chains networks with promising prospect for applications in construction, aerospace and electronics filed.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yulei Sui,Bingjue Wang,Zhihao Shi,Xiaoping Zhang,Xiang Gao,Shengkui Zhong,Yu Xia,Ling Wu
With the proposal of carbon peaking and carbon neutrality goals, clean energy storage is attracting more and more attentions. In view of the lack of lithium resource in our earth, sodium-ion batteries are considered as the emerging and promising next-generation energy storage devices. Appropriate high-performance anode materials play a vital role in the development of sodium-ion batteries. Here, a core-shell hollow Ni-Co-P nanopolyhedron interconnected by oxygen defect TiO 2 (Ni-Co-P@TiO 2- x ) is reported, which is synthesized by ion etching-hydrolysis and subsequent phosphatization/hydrogenation treatment using ZIF-67 as template and hybrid carbon source. The achieved Ni-Co-P@TiO 2- x material has several distinct advantages including hollow core-shell structure, flexible conductive carbon matrix, stable electroactive coating layer, and efficient pseudocapacitive behavior, resulting in high reversible capacities, remarkable rate capability and excellent cycle stability. The synergetic battery-capacitor characteristic of Ni-Co-P@TiO 2- x material makes it become a promising anode for sodium-ion batteries.
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高影响因子
ChemSusChem
·
2022
·Vol. 15
·期 13
·e202200233
·
IF 9.14
Zuojun Wei,Yuran Cheng,Hao Huang,Zhihe Ma,Kuo Zhou,Yingxin Liu
Graphical Simply the best : 14 Secondary metals and 6 catalytic supports are screened to fabricated Ni-based 10NiMn(4 : 1)/γ-Al 2 O 3 catalyst with improved activity and stability for the reductive amination of 5-hydroxymethylfurfural to 2,5-bis(aminomethyl)furan, which is attributed to the electron transfer effect between active Ni particles and the well-dispersed MnO x on the γ-Al 2 O 3 support. Mono- and bimetallic Ni-based catalysts were prepared by screening 6 supports and 14 secondary metals for reductive amination of 5-hydroxymethylfurfural (5-HMF) into 2,5-bis(aminomethyl)furan (BAMF), among which γ-Al 2 O 3 and Mn were the best candidates. By further optimization of the reaction conditions at 0.4 g catalyst loading for 0.5 g substrate of 5-HMF and 160 °C of reaction temperature, 10Ni/γ-Al 2 O 3 and 10NiMn(4 : 1)/γ-Al 2 O 3 achieved the highest BAMF yields of 86.3 and 82.1 %, respectively. Although the BAMF yield values were comparable with that over Raney Ni, the turnover frequencies based on the initial BAMF yield and unit weight of Ni for 10NiMn(4 : 1)/γ-Al 2 O 3 , 10Ni/γ-Al 2 O 3 , and Raney Ni were calculated as 0.41, 0.09, and 0.04 h −1 , respectively. X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy showed that the existence of MnO x well dispersed on the γ-Al 2 O 3 support and its electron transfer effect with Ni particles on the surface of the support contributed to the high efficiency and better recyclability for the five-time reused 10NiMn(4 : 1)/γ-Al 2 O 3 catalyst.
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PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 11
·3526-3536
·
IF 4
Junxiang Zhou,Yudeng Wang,Bo Feng,Yong Sun,Jiafu Wang
Ternary transition metal oxides (TMOs) are potentially promising anode materials for lithium storage with high power and energy density. Designing appropriate electrode structures is an effective strategy to sufficiently exhibit the advantages of TMOs for lithium storage. Here, we present the synthetic process and electrochemical properties of carbon-coated mesoporous Ni–Mn–Co–O (NMCO) nanowire arrays (NWAs) grown on Ni foam as an integrated electrode for lithium-ion batteries (LIBs). The electrochemical measurements show that the carbon-coated NMCO integrated electrode exhibits high capacity and cycling properties. In addition, we have also developed an all one-dimensional (1D) structural full cell using an LiMn2O4 nanorod cathode and an NMCO/Ni NWAs@C-550 anode, which exhibits relatively outstanding cycling properties.
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DOI
PubMed
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Hui Yong,Yiwan Chen,Yanquan Ji,Shuai Wang,Jiangwei Ma,Baosheng Liu,Jifan Hu,Yanghuan Zhang
Solid-state magnesium-based hydrogen storage encounters challenges associated with sluggish hydrogen absorption and desorption kinetics. The incorporation of catalysts is considered a promising means to improve the hydrogen absorption and desorption kinetics of these alloys. In this experiment, we prepared the Mg 80 Ni 15 Y 5 alloy via vacuum melting and incorporated TiF 3 in varying weight percentages of 1, 3, 5, and 7 wt% through ball milling . The phase composition and microstructure of the samples were analyzed and measured using X-ray diffraction meter (XRD), Transmission Electron Microscope (TEM), Selected Area Electron Diffraction (SAED), and Scanning Electron Microscope (SEM) techniques. The results revealed that the TiF 3 introduced two catalytically phases, MgF and TiF 2 . And TiF 2 transforms into TiH 2 after hydrogen absorption, which covers the surface of MgH 2 and prolongs the nucleation time of MgH 2 .Furthermore, the addition of TiF 3 made the surface of alloy markedly coarser and more irregular and few cracks, providing channels for hydrogen diffusion. This behavior optimized the kinetic performance of the alloy. It was observed that the samples containing 7 wt%TiF 3 achieved 99.2 % hydrogen saturation even in low-temperature. It's worth mentioning that the addition of 7 wt% TiF 3 to the Mg 80 Ni 15 Y 5 alloy significantly reduced the dehydrogenation activation energy to 58.5 kJ/mol, as opposed to pure magnesium with an activation energy of 158.2 kJ/mol. This substantial reduction has effectively accelerated the hydrogen absorption and desorption rates of the alloy. However, it had only a negligible impact on the thermodynamic properties of the sample with 7 wt%TiF 3 .
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高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2017
·
IF 3.204
Chen Zhu,Jing-Pei Cao,Xiao-Yan Zhao,Tao Xie,Jie Ren,Xian-Yong Wei
Selective cleavage of C O bonds in benzyl phenyl ether (BPE) as a typical lignin α-O-4 ether to produce aromatics is a challenging and attractive topic. Herein, the earth-abundant first-row transition metals, such as Co, Ni and Cu were supported on activated carbon (Co/AC, Ni/AC and Cu/AC) to identify their ability for cleaving C O bond of BPE. Among these catalysts, Ni/AC exhibit highest activity for cleavage of C O bond. The reaction with BPE was carried out at pretty mild condition of 140 °C and 2 MPa H 2 , which is highly selective afforded toluene and phenol as the major products with the optimum yields of 88.5 and 86.5%, respectively. Based on the test, the reaction pathways were proposed. A abundant of dissociated H· atoms on Ni(0) sites forms surface active Ni H species; Ni(0) activates and facilitates cleavage of the C O bond in BPE to form benzyl (C 6 H 5 C·) and phenoxy radicals (C 6 H 5 O·); H· atoms spill from active species Ni H recombined together with C 6 H 5 C· and C 6 H 5 O· forming the products of toluene and phenol, respectively.
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高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Tongxin Xiao,Ying Chen,Yuning Liang
The photocatalytic conversion of CO2 into hydrocarbon fuels by utilizing abundant solar energy is a promising and eco-friendly approach to address the energy crisis and global warming. In this work, the sensitizer Ni(II) tetra(4-carboxylphenyl)porphyrin (NiTCPP) was successfully combined with TiO2 nanotube arrays (TiO2NTs) by three methods, and their performances in the photocatalytic reduction of CO2 under simulated solar irradiation were studied. The results showed that NiTCPP/TiO2NTs exhibit a greatly ameliorated photocatalytic activity, and the photocatalytic reduction activities of NiTCPP/TiO2NTs prepared by different methods were different. The catalyst prepared by the impregnation method displayed the highest photoreduction efficiency. The reduction rate of CO2 into CH4 was up to 33.89 μmol/cm2/h with a quantum efficiency of 0.65% (at 420 nm), about 5 times that of the bare TiO2NTs. The introduction of NiTCPP not only efficiently expands the light absorption range but also enhances the charge separation efficiency. Furthermore, a possible mechanism of its CO2 photoreduction performances was systematically presented.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Zhouyu Tong,Yuxin Bi,Mingliang Ma,Zijian Liao,Weibo Huang,Kwok L. Chung,Yong Ma,Guanglei Wu,Yulong Qu,Chengbo Pan,Yusheng Wang
Novel composite microwave absorption (MA) materials with multiple loss mechanism have attracted considerable attention. In this work, flower-like surface Ni@Co 3 O 4 nanowires were designed and fabricated through chemical reduction method induced by magnetic field, followed by in-situ polymerization, low temperature oil bath and thermal annealing. Then, the Ni@Co 3 O 4 /RGO composites were prepared through a hydrothermal reaction of the Ni@Co 3 O 4 nanowires and graphene oxide suspension. The electromagnetic properties of different loading content samples (15 wt%, 25 wt% and 35 wt%) were measured to investigate the influence of loading content on the MA performance. For the 35 wt% loading sample, the minimum reflection loss (RL min ) value of −60.0 dB was determined at the thickness of 2.3 mm, and the maximum effective absorption bandwidth (EAB, RL < −10 dB) of 4.62 GHz can be achieved when the thickness is 1.6 mm. This research provides a reference for exploiting high-efficient flower-like surface magnetic-dielectric composites in the field of MA.
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高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 23
·8983-8988
·
IF 8.262
Yu Liu,Xuehui Gao,Zhanglian Hong,Weidong Shi
Uniform nitrogen-doped C/Ni/TiO2 hollow spindles were successfully prepared with Ni nanoparticles encapsulated into the hollow N-doped TiO2/C matrix. This intriguing architecture not only exhibits favorable conductivity, but also provides a large quantity of accessible active sites for lithium ion insertion, thus contributing to superior lithium storage properties.
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高影响因子
危险品化学品经营许可证（带存储）