INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Zhonghui Zhang,Changlei Qin,Zhiliang Ou,Jingyu Ran
H 2 S is a kind of common impurity produced during the gasification of biomass, and it will poison the catalysts used in biomass tar steam reforming , leading to a rapid degradation on the catalytic performance. The purpose of this work is to investigate the characteristics of biomass tar steam reforming using Ni/perovskite catalysts with the presence of H 2 S. Results show that H 2 S could significantly reduce catalytic activity due to the adsorption of sulfur on Ni surface , and Ni/perovskite catalysts are less susceptible to this poisoning in comparison to the Ni-catalyst loaded on γ-Al 2 O 3 . To understand the mechanism, fresh and spent catalysts were characterized using various techniques of XRD , SEM-EDS, XPS and TPO . It is proved that the lattice oxygen in perovskite could transform into surface species, inhibit the adsorption of sulfur and thus benefit to the reactivity of catalysts during biomass tar steam reforming.
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DOI
高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Xiangze Du,Xiaomei Lei,Linyuan Zhou,Yong Peng,Yan Zeng,Huiru Yang,Dan Li,Changwei Hu,Hermenegildo Garcia
In the context of the preparation of liquid fuels derived from biomass with zero CO2 footprint, fatty acids appear as suitable feedstocks. However, reduction of carboxylic acid groups usually requires harsh reaction conditions and the development of efficient solid catalysts. Herein, bimetallic Ni–Mo nitrides have been obtained by a procedure not involving nitridation of the corresponding oxide, but reductive decomposition of the tris(ethylenediamine)nickel molybdate at temperatures between 550 and 700 °C. Successful formation of the Ni3Mo3N nitride is confirmed by X-ray diffraction. Ni3Mo3N samples are found to be efficient catalysts for the hydrodeoxygenation of palmitic acid to C15/C16 alkanes with a combined selectivity over 90 and 100% palmitic acid conversion and higher activity than analogous Ni–Mo nitrides obtained by NH3 nitridation of NiMoO4. Ni3Mo3N is found recyclable with only a slight decay in the catalytic activity upon consecutive reuses attributable to the neutralization of acid sites. The present results show an opportunity that bimetallic nitrides offer as robust advanced solid catalysts for reactions of biomass conversion requiring harsh conditions.
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DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2022
·
IF 4.865
Hongjie Li,Yi He,Pingya Luo,Huilian Zhou,Bo Liu,Yahui He,Ruxia Song,Zhifei Zhang,Yi Fan
In this study, a novel superhydrophobic composite coating is prepared by a two-step method. Firstly, the Ni-based deposition coating is fabricated via composite electrodeposition with WS 2 granules worked as dispersed phase particles, and the roughness of deposit coating can be adjusted by changing the added amount of sulfide in the bath. The prepared Ni-WS 2 deposit exhibits sufficiently high roughness and suitable micro-nano morphology. Then, hexadecyltrimethoxysilane (HDTMS) is used to modify the deposition coating with low surface energy to obtain silanol-modified Ni-WS 2 coating with superhydrophobic properties. The superhydrophobic behavior of the composite coating conforms to the Cassie-Baxter model, with low adhesion to aqueous solutions. When the addition amount of WS 2 particles in the plating solution during the electrodeposition process is 5 g·L −1 , the prepared composite coating has the excellent superhydrophobic properties. The water contact angle of the composite coating is 154.7° ± 2 and the sliding angle can reach 6°. And the superhydrophobic composite coating exhibits excellent corrosion resistance .
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DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2022
·
IF 6.267
Zhi-Wen Zhang,Cui-Ying Lu,Guang-Hui Liu,Yuan-Jia Cao,Zhen Wang,Ting-ting Yang,Yu-Hong Kang,Xian-Yong Wei,Hong-Cun Bai
A green and effective nitrogen and nickel in-situ doping strategy was designed to prepare cellulose-based N/Ni co-doped porous carbon (PC). The co-hydrothermal pretreatment induced by hydrazine hydrate and nickel acetate effectively modifies the physico-chemical structure of PC and further improves its electrochemical performance. The efficient N-supply and unique heteroatom regulation performance of hydrazine hydrate is related to its strong reducibility. The specific surface area and total pore volume of the synthesized N 4 NiPC 220-3 are 1383.66 m 2 g −1 and 0.59 cm 3 g −1 , while the N and O contents are 1.35 and 10.41%, respectively. At current densities of 0.5 and 20 A g −1 , N 4 NiPC 220-3 exhibits a high specific capacitance of 415 F g −1 and a good capacitance retention of 72.22%, respectively. After 10,000 charge/discharge cycles, the retention rate is as high as 96.06%, confirming its excellent cycling stability. The two-electrode system test results further show that the energy density of N 4 NiPC 220-3 is as high as 35.6 W h kg −1 at a power density of 500.1 W kg −1 , while a high retention rate of 87.87% is still obtained after 10,000 cycles. This green and efficient synthesis method based on in-situ co-doping of hydrazine hydrate and nickel acetate is a promising alternative strategy for producing carbon-based supercapacitors.
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 45
·期 3
·1584-1589
·
IF 3.288
Kui Liu,Yafei Cheng,Ying Shi,Wei Zhang,Yu Wang,Fan Tang,Xijie Lin
La–Ni bimetallic oxides, including LaNiO3 and La2NiO4, were prepared by a facile co-precipitation process, followed by calcination treatment. The formation process of these two La–Ni bimetallic oxides was traced by X-ray diffraction, and the calcination temperature was determined to have a crucial influence on the composition and crystalline structure of the final sample. These as-prepared La–Ni bimetallic oxides were used as catalysts for the decomposition of hydrogen peroxide. Benefiting from the synergistic effect between La and Ni, these La–Ni bimetallic oxides showed superior catalytic ability than the single-components oxides such as La2O3, Ni2O3, and NiO. Additionally, the La–Ni bimetallic oxides exhibited efficient catalytic activity after reusing them several times, showing a desirable cyclic performance. Moreover, the kinetics of the reaction was investigated. The activation energy of this reaction significantly decreased under the catalysis from the as-prepared La–Ni bimetallic oxides, further confirming the promising catalytic potential of these La–Ni bimetallic oxides.
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DOI
高影响因子
MATERIALS & DESIGN
·
2020
·
IF 6.289
Yuxin Wang,Linlin Guan,Zhen He,Shengping Zhang,Harshpreet Singh,Muhammad Dilawer Hayat,Caizhen Yao
Aluminum often requires protective coatings to prevent corrosion. The aluminum alloy substrate usually needs pretreatment to minimize, stabilize or convert the surface oxide in order to achieve adequate coating adhesion. The electrodeposited Ni-P coating is a promising candidate as a protective coating due to its easy fabrication and excellent performance. This study comprehensively investigates the pretreatment of zincating and anodizing on 6061 aluminum alloy, and systematically discusses their influence on the electrodeposited Ni-P coatings. The crystal structure and elemental composition were investigated for interlayers and Ni-P coatings subsequently, while morphologies of the coating surface and cross-section were also determined. The results revealed similar phase composition for differently pretreated Ni-P coatings, while distinct nodule featured morphology was observed for anodized Ni-P coating. It was found that anodized Ni-P coatings had the best performance due to its superior coating adhesion, wear-resistance, and corrosion resistance. In contrast, severe wear damage was occurred to zincated Ni-P coatings due to its inferior microstructure and weak zinc interlayer. Lastly, the influence of anodizing pretreatment on the coating microstructure is discussed, and a model is proposed for Ni-P electrodeposition employing anodizing pretreatment.
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 104
·期 10
·5148-5156
·
IF 3.784
Fang Guan,Yiquan Wu,Iva Milisavljevic,Xin Cheng,Shifeng Huang
Spinel-structured NiMn 2 O 4 ceramics, with different valence Ni sources, were originally prepared using Ni 2 O 3 and NiO as raw materials, and the effects of different valence Ni sources on their electrical properties were first investigated. XRD patterns show that both Ni 2 O 3 -based and NiO-based NiMn 2 O 4 ceramics are single cubic spinel structures. SEM/EDS images indicate that the NiMn 2 O 4 ceramics exhibited high density at the experiment-determined sintering temperatures. XPS results and Raman drifts prove that the Ni valence-induced changes in Mn ions at B sites played a significant role in the electrical properties and thermal stability of NiMn 2 O 4 ceramics. Compared with NiO-based NiMn 2 O 4 , the resistivity at 25°C ( ρ 25°C ) of Ni 2 O 3 -based NiMn 2 O 4 increased dramatically from 3109 to 106958 Ω cm, the thermal constant ( B 25 / 50 ) increased from 3264 to 4473 K, and the resistance shifts after annealing for 1000 h at 150°C decreased from 0.80% to 0.74%. The investigation of the relationship between the material properties and valence of Ni sources has provided a new and effective way for designing the spinel-structured negative temperature coefficient (NTC) materials by modulating the valence of ions at A sites in the raw materials.
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高影响因子
Polymers
·
2020
·Vol. 12
·期 10
·2192
·
IF 3.426
Qiu-Shi Rao,Song-Yi Liao,Xing-Wen Huang,Yue-Zhu Li,Yi-Dong Liu,Yong-Gang Min
In this work, a few-layer MXene is prepared and sprinkled on a commercial polypropylene (PP) separator by a facile spraying method to enhance the electrochemistry of the Ni-rich LiNi0.8Co0.1Mn0.1O2(NCM811) cathode. Scanning electron microscope (SEM) and X-ray diffraction (XRD) are used to characterize the morphology and structure of MXene. Fourier transform infrared spectroscopy (FT-IR) and a contact angle tester are used to measure the bond structure and surface wettability PP and MXene/PP separator. The effect of the MXene/PP separator on the electrochemical performance of ternary NCM811 material is tested by an electrochemical workstation. The results show that the two-dimensional MXene material could improve the wettability of the separator to the electrolyte and greatly enhance the electrochemical properties of the NCM811 cathode. During 0.5 C current density cycling, the Li/NCM811 cell with MXene/PP separator remains at 166.2 mAh/g after the 100 cycles with ~90.7% retention. The Rctof MXene/PP cell is measured to be ~28.0 Ω. Combining all analyses results related to MXene/PP separator, the strategy by spraying the MXene on commercial PP is considered as a simple, convenient, and effective way to improve the electrochemical performance of the Ni-rich NCM811 cathode and it is expected to achieve large-scale in high-performance lithium-ion batteries in the near future.Keywords:polypropylene composite membrane;MXene;Ni-rich LiNi0.8Co0.1Mn0.1O2;electrochemical performance
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DOI
PubMed
高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Xin Song,Fangjun Shao,Zijiang Zhao,Xiaonian Li,Zhongzhe Wei,Jianguo Wang
It is challenging to develop an alkyne semi-hydrogenation catalyst with both high selectivity and high activity, especially at low temperatures and low pressures. Herein, a single-atom Ni-modified Al2O3-supported Pd is proposed as a modulation strategy to optimize the selectivity of alkyne semi-hydrogenation. Sphere-difference-corrected transmission electron microscopy and synchrotron radiation confirm that Ni single atoms enter the alumina lattice in a highly dispersed state, while Pd is loaded on the Ni-modified support in the form of nanoparticles. For the semi-hydrogenation of phenylacetylene, the Pd0.5/Ni0.5@γ-Al2O3 catalyst with Pd and Ni loadings of 0.45 and 0.43 wt %, respectively, achieves 98% conversion and 94% selectivity at 298 K and 0.1 MPa. It also possesses good stability, as the activity remains unchanged after 10 cycles of application. The Pd0.5/Ni0.5@γ-Al2O3 catalyst inherits the high activity of Pd and the high selectivity of Ni to achieve efficient semi-hydrogenation of phenylacetylene at low temperatures and pressures, benefiting from the synergistic effect of Pd and Ni.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jiayi Chen,Xu Li,Bo Ma,Xudong Zhao,Yantao Chen
The inferior performance of non-precious metals on electrocatalytic hydrogen evolution can be mainly attributed to the inappropriate adsorption strength of intermediates. A core–shell heterostructure of CoP@Ni is developed by hydrothermal reaction, thermal phosphorization and subsequent electrodeposition, with metallic Ni supported by CoP nanowire array. The as-prepared CoP@Ni core–shell heterostructure nanowire array has a superior activity on hydrogen evolution in alkaline electrolyte, with an overpotential of 71 mV to drive 10 mA cm −2 and a Tafel slope of 66 mV dec -1 . The electronic structure of CoP@Ni is tuned for modulating the adsorption strength of intermediates. The theoretical calculations reveal that CoP@Ni has metallic characteristics with a zero-bandgap, which leads to the promoted charge transfer. More importantly, the intrinsic activity of CoP@Ni is greatly increased, with a lower energy barrier in the reaction pathway. This work points out the importance of constructing the heterostructure for improving the intrinsic activity, which can pave the way to the exploration of high-performance and cost-effective electrocatalysts for hydrogen production.
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DOI
PubMed
高影响因子
Nano Research
·
2021
·Vol. 15
·期 4
·2935-2942
·
IF 8.897
Chen Jiayi,Li Xu,Ma Bo,Zhao Xudong,Chen Yantao
The sluggish charge transfer and poor intrinsic activity are the bottlenecks that hamper the further development of electrocatalysts for hydrogen evolution. A novel core-shell heterostructure of Cu 3 P@Ni is fabricated, which is composed of Cu 3 P nanorods covered by metallic Ni. The as-prepared Cu 3 P@Ni exhibits a durable and superior activity toward hydrogen evolution, with an overpotential of 42 mV to deliver 10 mA·cm −2 and a Tafel slope of 41 mV·dec −1 . Charge redistribution is observed after successfully constructing the core-shell heterostructure, leading to the altered electronic structure. The theoretical calculations have manifested that Cu 3 P@Ni exhibits a zero bandgap and optimized adsorption strength of intermediates, which could give rise to the accelerated charge transfer as well as increased intrinsic activity. This work could shed light on the development of novel electrocatalysts with modulated electronic structure for highly efficient hydrogen evolution.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Yong Bai,Xinran Qiu,Qian Zhang,Songbai Qiu,Yanlin Qin,Tiejun Wang
Recently, the ecofriendly techniques for production of nanohybrids using natural biomass have aroused great attention. This study reported a green and facile synthesis of highly dispersed supported metal catalysts using sesbania powder (SP) extracted from the natural sesbania plant. Well-dispersed Ni/SiO2 catalysts were effectively fabricated by an SP-assisted sol–gel method. The influencing factors including the additive amounts of SP, metal loadings, and metal types on the physicochemical properties of supported catalysts were primarily investigated. The testing results revealed that the additive SP significantly facilitated the uniform distribution of metal species during heat treatment, leading to the existence of ultrasmall nanoparticles (<4 nm) and high dispersion of supported metal. The as-prepared Ni/SiO2 catalysts were applied to the dry reforming of methane and demonstrated excellent catalytic performance due to the prevention of the agglomeration of Ni species and fabrication of Ni embedded in the silica framework through the introduction of SP.
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DOI
高影响因子
危险品化学品经营许可证（带存储）