JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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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.
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高影响因子
FUEL
·
2024
·
IF 6.7
Yuhang Jing,Feng Gong,Sijun Wang,Wenbin Wang,Peng Yang,Enkang Fu,Rui Xiao
Plasma-assisted ammonia synthesis (PAAS) can produce ammonia using highly energetic, electronically excited nitrogen and Hydrogen radicals at low temperatures and atmospheric pressure, which has been regarded as a prospective alternative to the Haber − Bosch process. PAAS can exclusively use renewable power (solar, wind, etc.) to achieve green, decentralized and efficient ammonia synthesis. However, current catalysts for PAAS are suffering from low efficiency, poor stability and cyclability. Herein, we demonstrate a one-step hydrothermal synthesis of Ni-Co bimetallic metal–organic frameworks (MOFs) for PAAS. Attributed to the amplified gas transport capability and bimetallic coupling, the Ni-Co-MOF exhibits significantly improved PAAS performance: 88.21 μmol g −1 ·min −1 , above 30 % increase over 5 wt% Ni/Al 2 O 3 . The high stability of Ni-Co-MOF under the harsh electric field enables its durable performance (36 h) and excellent cyclability (24 cycles). Finally, to determine the viability of PAAS for industrial applications, we construct a hypothetical zero-carbon ammonia plant using only renewable energy sources, and the outcomes indicate that PAAS has significant competitiveness for future ammonia production.
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AICHE JOURNAL
·
2025
·
IF 4
Bin Chen,Xingwen Cha,Xuexue Dong,Juanjuan Bian,Jiale Huang,Qingbiao Li,Xiaoqing Huang,Guowu Zhan
Upgrading biomass-derived fatty acids through the H 2 -free and solvent-free catalytic deoxygenation process is both safe and eco-friendly. Herein, we used modified rice husk-derived biochar with ultra-high specific surface area and abundant surface groups as a support to design a homologous bimetallic site catalyst containing Ni single atoms (Ni 1 ) and Ni nanoclusters (Ni n ), the synergy between which is dedicated to excellent catalytic performance. The designed catalyst, Ni 1+n /A-bio-AC, demonstrated an impressive 89.8% selectivity for odd-numbered long-chain alkanes during the H 2 -free and solvent-free deoxygenation of stearic acid, with a turnover frequency value over 18 times higher than conventional Ni/AC. Multiple characterizations revealed the coexistence of Ni 1 and Ni n on the catalyst support. Experimental and theoretical calculations showed that Ni n facilitates the adsorption of fatty acid substrates. While Ni 1 serves as highly dispersed Lewis acid sites, enhancing the dehydrogenation of fatty alcohol intermediates during the in situ hydrodeoxygenation and lowering the decarboxylation pathway energy barriers via electronic synergy with Ni n , thus remarkably boosting the catalytic deoxygenation activity. This work provides a novel Ni dual-site catalyst for developing biomass resource conversion technologies.
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Chemosensors
·
2024
·Vol. 12
·期 3
·39
·
IF 3.7
Yu Zhang,Chang Liu,Rongqiu Yan,Chenghong Lei
Bipyridyl Ruthenium-decorated Ni-MOFs on multi-walled carbon nanotubes (MWCNT-RuBpy@Ni-MOF) were synthesized. In an alkaline solution, the glucose was electrocatalytically oxidized at +0.5 V vs. Ag/AgCl at the composite interface of MWCNT-RuBpy@Ni-MOF on a glassy carbon electrode. The Ni3+/Ni2+redox couples in Ni-MOFs played a key role as the active center for the catalytic oxidation of glucose at the electrode, where both RuBpy and MWCNTs enhanced the current responses to glucose. The resulting enzymeless glucose sensor from MWCNT-RuBpy@Ni-MOF exhibited a wide range of linear responses, high sensitivity and selectivity for the determination of glucose.
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JOURNAL OF HAZARDOUS MATERIALS
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2010
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IF 4.144
Zhanqiang Fang,Xinhong Qiu,Jinhong Chen,Xiuqi Qiu
Polybrominated diphenyl ethers have been identified as a new class of organic pollutants with ecological risk due to their toxicity, bioaccumulation, and global distribution. Proper remediation technologies are needed to remove them from the environment. In this paper, Ni/Fe bimetallic nanoparticles were synthesized by chemical deposition and used to degrade decabromodiphenyl ether (BDE209). The characteristics of Ni/Fe nanoparticles were analyzed by transmission electron microscopy, X-ray diffractometry, X-ray photoelectron spectroscopy, and Brunnaer–Emmett–Teller surface area analysis. Ni/Fe bimetallic nanoparticles with diameters in the order of 20–50 nm could effectively degrade BDE209 in the solvent (tetrahydrofuran/water). Influence factors, such as Ni/Fe nanoparticle dosage, initial BDE209 concentration, and Ni loading, on the removal of BDE209 were studied. The results indicated that the degradation of BDE209 followed pseudo-first-order kinetics, and the degradation rate of BDE209 increased with increasing the amount of nano Ni/Fe particles, Ni/Fe ratio, and decreasing the initial concentration of BDE209. Through analyzed the mass balance of the BDE209 removal, degradation was the main process of BDE209 removal. The mechanism of debromination was deduced by analyzing the reaction products using gas chromatography–mass spectrometry, the bromide ion in the solution and varying the solvent conditions. Stepwise hydrogen reduction is the main process of debromination, and the hydrion play an important role in the reaction. Moreover, the experiment of long term performance and leaching of Ni were also carried out to test the stability and durability of Ni/Fe nanoparticles in BDE209 degradation.
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DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2024
·
IF 4.4
Huangdong Wang,Zhihua Guo,Heng Zhang,Lin Jia,Min Sun,Lifeng Han,Haorun Li,Yan Guo,Shanghong Zeng
Arranging the active ingredients on the support surface at the molecular or atomic scale to create high-selectivity sites for the electrocatalytic CO2 reduction reaction (CO2RR) holds great promise, which is highly challenging. In this study, we report a strategy for constructing a bimetallic Ag–Ni electrocatalyst with Ni nanoparticles for H2O dissociation, as well as Ni atoms in the carbon skeleton and Ag nanoparticles on the surface for the CO2RR. These sites synergistically enable high selectivity for improving the conversion of CO2 to CO. Specifically, the FECO reaches 99.3% on Ag–Ni/CB at −0.8 V vs. RHE, and its FECO can be maintained over 95.8% in the potential range from −0.8 to −1.1 V vs. RHE. Our research presents an approach for alignment of bifunctional two-component active sites on the surface of a carbon support.
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ELECTROCHIMICA ACTA
·
2012
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IF 3.832
Xianjun Liu,Deyu Wang,Siqi Shi
The electrochemically interfacial stability between Ni foam and organic electrolyte is studied under Ar and O 2 atmospheres, respectively. The potential of Ni foam cycled under Ar atmosphere does not reach 3.8 V vs. Li/Li + , and is finally stabilized at ∼3.4 V vs. Li/Li + . This phenomenon is the result of the electrolyte's continuous decomposition, which produces a thick layer of particles (0.8–1.2 μm) covered on Ni foam surface. Ni foam under O 2 atmosphere can be successfully cycled between 2.0 and 4.5 V vs. Li/Li + although there exist some precipitations on the surface, which originate from the electrolyte decomposition occurring at 4.2 V vs. Li/Li + in the initial charge. For the cycling between 2.0 and 4.0 V vs. Li/Li + , Ni foam surface almost keeps intact. Our results reveal that O 2 atmosphere significantly improves the electrochemical stability between Ni foam and electrolyte and thus enables Ni foam to work as current collector in rechargeable lithium-air battery .
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Nanomaterials
·
2017
·Vol. 7
·期 8
·205
·
IF 3.553
Yongjian Li,Panpan Guan,Fucheng Yu,Wei Li,Xiaoling Xie
The electrode based on cerium oxide (CeO2) nanorods embedded in nickel hydroxide (Ni(OH)2) matrix were prepared and used for detecting glucose non-enzymatically. The materials were characterized by X-ray diffraction, transmission electron microscopy (TEM), and so on. The results indicate that the response of CeO2/Ni(OH)2nanocomposite are significantly improved due to the synergetic effect between CeO2and Ni(OH)2. The optimum CeO2/Ni(OH)2nanocomposite electrode exhibits a detection range from 2 μM to 6.62 mM, a sensitivity of 594 μA mM−1cm−2, an estimated detection limit of 1.13 μM, and a response time less than 5 s. In addition, this biosensor also shows good selectivity, long term stability, and accurate measurement in juice on sale.Keywords:cerium oxide;nickel hydroxide;biosensor;glucose;nanocomposite
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PubMed
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RENEWABLE ENERGY
·
2024
·
IF 9
Daxin Jiang,Min Lin,Yuhao Yan,Lulu Zhan,Rui Li,Yulong Wu
Catalytic hydrodeoxygenation (HDO) is an effective way to produce high–value products from lignin-derived phenolic compounds. In this work, three different morphologies of Ni/CeO 2 catalysts (amorphous, cubic, and rod-shaped) have been prepared through the conventional wet impregnation method. They can be used for the HDO of guaiacol to prepare cyclohexanol, an important chemical raw material. The influence of different morphologies of CeO 2 on catalytic activity was explored. The research results indicate that Ni/CeO 2 –r catalysts with rod-shaped structures exhibit excellent catalytic properties. As a result, a 100 % conversion rate and 96.9 % cyclohexanol yield were achieved on the Ni/CeO 2 –r catalyst at 240 °C. The catalytic performance of the three catalysts follows this order: Ni/CeO 2 –r (rod-shaped) > Ni/CeO 2 –c (cubic) > Ni/CeO 2 –p (amorphous). The results of Raman and XPS indicate significant differences in the surface oxygen vacancy in catalysts with different morphologies. The Ni/CeO 2 –r catalyst has the highest oxygen vacancy concentration and defect. In addition, Ni/CeO 2 –r also has the largest specific surface area (S BET ) and the highest nickel dispersion, and forms more Ni 0 because of the strong interaction of Ni species and CeO 2 support. Therefore, Ni/CeO 2 –r exhibits the most excellent catalytic performance for the hydrogenation of guaiacol than the other two catalysts. Moreover, the cycling activity test was also investigated over the Ni/CeO 2 –r catalyst. After five cycles, the conversion rate of guaiacol and the yield of cyclohexanol hardly decrease. This work provides vital ideas for the development of higher-activity, higher-stability, and low-cost catalysts for the conversion of lignin-derived phenolic compounds in the future.
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Coatings
·
2024
·Vol. 14
·期 5
·584
·
IF 2.9
Donghua Chen,Yang Liu,Jun Wang,Tenghao Ma,Hui Zhi,Wei Xiao,Yabin Wang,Jing Wang
Nickel-element-doped zinc cobaltate/carbon fiber composites (Ni-ZnCo2O4/CF) were prepared on carbon cloth (made of a combination of carbon fibers) conductive substrates using a simple ambient stirring method combined with heat treatment. Characterization tests of the materials revealed that the prepared products were porous Ni-ZnCo2O4/CF mesh structures. This porous network structure increases the surface area of the material and helps shorten the diffusion path of ions and electrons. The samples were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) methods to investigate the effect of Ni elemental doping on the stability of the materials. The results show that there are no other impurity peaks and no other impurity elements in the Ni-ZnCo2O4/CF electrode material, which indicates that the sample purity is high. Meanwhile, the electrochemical properties of Ni-ZnCo2O4/CF electrode materials were studied. Under the condition of 15 A·g−1, the specific capacitance of Ni-ZnCo2O4/CF electrode material is 1470 F·g−1, and after 100 cycles, its specific capacity reaches 1456 F·g−1, which is 99.0% of the specific capacity of 1470 F·g−1, indicating that the electrode material has good stability. In addition, we assembled asymmetric supercapacitors (Ni-ZnCo2O4/CF//CNTs) with Ni-ZnCo2O4/CF as the positive material and carbon nanotubes (CNTs) as the negative material. In the cyclic stability experiment of Ni-ZnCo2O4/CF/CNTs devices, when the current density was 1 A·g−1, the specific capacitance was 182 F·g−1. After 10,000 cyclic charge–discharge tests, the specific capacity became 167 F·g−1, which was basically unchanged compared with the initial specific capacity, reaching 91.8%. It shows that it has higher charge–discharge performance and higher cycle stability.
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ADVANCED ENGINEERING MATERIALS
·
2024
·
IF 3.4
Fei Chen,Chengbao Liu,Leizhi Zheng,Feng Chen,Junchao Qian,Yongbin Qiu,Xianron Meng,Zhigang Chen
Nickel hydroxide (Ni(OH) 2 ) is recognized as a promising material for electrodes in supercapacitors owing to its exceptional theoretical specific capacitance. However, Ni(OH) 2 has several drawbacks, including a short cycle life, susceptibility to volume expansion, and poor electrical conductivity. In this work, Ni(OH) 2 nanosheets anchored on layered g-C 3 N 4 /C (Ni(OH) 2 –g–C 3 N 4 /C) are designed by biological template induction and a hydrothermal method. Ni(OH) 2 –g–C 3 N 4 /C has unique petal-like structures, which can provide a vertical charge transport channel to increase reaction potential of the material during the charge–discharge process. The introduction of biomass carbon can solve the problem of the bulk phase accumulation of g-C 3 N 4 and can also improve the overall conductivity of the composite. Compared to Ni(OH) 2 (522 F g −1 ), g-C 3 N 4 /C (76.2 F g −1 ), and g-C 3 N 4 (16 F g −1 ), the Ni(OH) 2 –g–C 3 N 4 /C-0.75 (NGC-0.75) composite exhibits the highest specific capacitance of 1034 F g −1 at 1 A g −1 . Furthermore, after 5000 cycles at 5 A g −1 , the capacitance of the material is maintained at 85.97%. Meanwhile, the asymmetric supercapacitor based on the NGC-0.75 shows a high energy density of 18.29 Wh kg −1 at the power density of 400.02 W kg −1 with excellent cyclic stability of 127.45% over 10 000 cycles.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jiming Wang,Min Ji,Jiaqi Lv,Min Wang
Photo-thermo-chemical dry reforming of methane (PTC-DRM) produces syngas has been a promising strategy to utilize abundant solar energy and alleviate greenhouse effect. Herein, we report an efficient PTC-DRM process on Ni-based catalyst with Zn doping and investigate the effect of Zn on the catalytic performance of catalysts. Zn promoted the generation of active sites on the surface of Ni-Al 2 O 3 , suppressed the accumulation of coke during the reaction process and enhanced the photocatalytic activity of the catalyst. Ni-ZnO-Al 2 O 3 catalyst exhibited highest thermal catalytic performance and the conversion of CH 4 and CO 2 are 50.2% and 58.1% at 650 ℃, respectively. All catalysts exhibited higher reaction rates of CH 4 and CO 2 and higher hydrogen selectivity under light conditions. Light also significantly enhanced the carbon deposition resistance and stability of the catalyst. And possible reaction mechanism of the Ni-ZnO-Al 2 O 3 was proposed during PTC-DRM process.
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