ACS Catalysis
·
2024
·
IF 11.3
Haoquan Guo,Jiwu Zhao,Yu Chen,Xinyu Lu,Yue Yang,Chenrong Ding,Lizhi Wu,Li Tan,Jinlin Long,Guohui Yang,Yu Tang,Noritatsu Tsubaki,Xiaoli Gu
Lignin derivatives are one class of attractive alternative feedstocks for the production of renewable biofuels. Herein, hydrodeoxygenation (HDO) of lignin derivatives was carried out using a single-atom catalyst (SAC) comprised of Ni1 SAC on β-Mo2C. A number of lignin-derived compounds have been investigated, and nearly 100% yield of biofuel molecules was converted from various lignin derivatives through the HDO reaction, demonstrating that Ni1/β-Mo2C has remarkable potential for the production biofuels through catalytic hydrodeoxygenation of lignin derivatives. The reaction mechanism of DHE over single-atom catalyst Ni1/β-Mo2C was confirmed based on comprehensive characterizations of catalysts and DFT calculations. Interestingly, the Ni single-atom active sites alter the reaction pathway by shifting the geometry of the adsorbed intermediate from a vertical to horizontal conformation, which lowered the reaction energy barrier and improved the selectivity to biofuel molecules, resulting in extraordinary catalytic activity. This study suggests an avenue for single-atom catalysis in chemical transformations of lignin derivatives into biofuels.
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Molecular Catalysis
·
2024
·
IF 3.9
Chengliang Wang,Yin Zhang,Haitao Li,Feifan Zhang,Jie Wang,Wei Wei,Yongxiang Zhao
Core-shell Ni@C catalysts with a uniform grain size distribution were synthesised via a simple hydrothermal method followed by pyrolysis carbonisation, and their catalytic performance for the liquid-phase hydrogenation of maleic anhydride (MA) was investigated herein. When the pyrolysis temperature was 350 °C, the resulting Ni@C catalyst (Ni@C-350) possessed abundant Ni/NiO heterostructures and a carbon surface layer. Among the analysed catalysts, Ni@C-350 demonstrated the lowest apparent activation energy for the hydrogenation of C C bonds ( Ea = 34.3 KJ/mol) and C O bonds ( Ea = 65.18 KJ/mol), yielding an MA conversion of 100 % and a γ-butyrolactone (GBL) selectivity of 99.89 % under mild reaction conditions (200 °C, 3 MPa hydrogen pressure, and 0.05 g catalyst). Furthermore, the Ni@C-350 catalyst exhibited high stability, with the yield of GBL above 95 % after five consecutive usage cycles. Ni@C-350 significantly outperformed other previously reported catalysts for the liquid-phase hydrogenation of MA.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Qiang Fang,Lu Hao,Tao Zhao,Jiahui Li,Genyan Hao,Guang Liu,Dazhong Zhong,Jinping Li,Qiang Zhao
The electrocatalytic production of 2,5-furandicarboxylic acid (FDCA) via the 5-hydroxymethylfurfural oxidation reaction (HMFOR) is an effective and more suitable alternative to the oxygen evolution reaction (OER) in electrocatalytic water splitting. High-valence Ni(III) is critical for the HMFOR, but the formation is greatly limited by the difficult in situ self-oxidation. In this study, the pre-oxidization-derived amorphous NiO x H y nanosheet presents more accessible Ni(III) for efficient HMFOR. In addition, NiO x H y /NF exhibits a low onset potential of 1.35 V, a high FDCA yield of 98.5 %, and a high Faradaic efficiency of 98.3 % for the HMFOR in 0.1 M KOH with 10 mM HMF. In situ Raman spectroscopy results indicate that Ni(III)OOH is an active intermediate in the electrochemical HMFOR. This work provides a strategy for promoting the formation of high-valence Ni(III) and boosting biomass oxidation.
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CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Jiaoyang Hao,Lin Tan,Jiaqi Xu,Xiaowei Ma
Metal organic frameworks (MOFs) derived materials have attracted a lot of attention in the field of electromagnetic wave (EMW) absorption. In this regard, we improved the EMW absorption performance of Ni-based MOF derived materials by introducing sulfur and nitrogen dual-doped graphene (N,S-GS), which possesses good electrical conductivity. The minimum reflection loss (RL min ) of Ni/C/N,S-GS can reach −51.4 dB at 10.1 GHz when the absorber thickness is only 2.43 mm, with an effective absorption bandwidth (EAB) of 3.04 GHz. This work provides us with a novel strategy for the synthesis of composites with high-performance microwave absorption for practical applications.
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Journal of CO2 Utilization
·
2024
·
IF 7.2
Luqman Abdullahi Sani,Haolong Bai,Zifu Xu,Liangliang Fu,Yining Sun,Xiaorui Huang,He Gao,Xuejing Liu,Dingrong Bai,Zhanguo Zhang,Fabing Su,Jiao Liu,Guangwen Xu
Ni/Al 2 O 3 catalysts (noted as Ni/Al-350, Ni/Al-500, and Ni/Al-700, respectively) were synthesized by a facile solution combustion method but at different combustion temperatures (350 °C, 500 °C, and 700 °C, respectively). For comparison, Ni/Al 2 O 3 (noted as Ni/Al-100) was also prepared by the impregnation method and applied in the methanation reaction. The Ni/Al 2 O 3 synthesized at the combustion temperature of 350 °C showed better performance than the others at higher combustion temperatures, and the activity for CO 2 methanation followed an order of Ni/Al-350 > Ni/Al-500 > Ni/Al-700 > Ni/Al-100. The increase in the combustion temperature decreased active sites for the H 2 and CO 2 adsorption, which could be associated with the reduced Ni dispersion and basic sites, thus lowering its activity and increasing its carbon deposition rate.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
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IF 3.141
Zihao Zhang,Zehua Pei,Hao Chen,Kequan Chen,Zhaoyin Hou,Xiuyang Lu,Pingkai Ouyang,Jie Fu
Al2O3-supported Cu and Ni monometallic as well as Cu–Ni bimetallic catalysts were synthesized using a coprecipitation method and studied for the in-situ hydrogenation of furfural (FAL) with isopropanol as the solvent and hydrogen donor. The Cu–Ni bimetallic catalysts showed improved activity toward the production of 2-methylfuran (2-MF) and 2-methyltetrahydrofuran (2-MTHF) over that of monometallic catalysts. The results indicated that isopropanol exhibited better performance than methanol for the in-situ hydrogenation of FAL to produce 2-MF and 2-MTHF under the same conditions. The reaction conditions such as the copper–nickel ratios, catalyst loading amount, reaction temperature, and time were optimized. After the reaction was complete, the supported Cu–Ni bimetallic catalyst could be reused four times without a significant loss in catalytic activity.
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ELECTROCHIMICA ACTA
·
2018
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IF 5.116
Zhihao Yue,Siyu Yao,Yuanzhen Li,Wenxin Zhu,Wentao Zhang,Rong Wang,Jing Wang,Lunjie Huang,Dongyang Zhao,Jianlong Wang
In order to resolve the pollution and waste caused by urea-rich wastewater, designing superior and stable earth-abundant catalysts for urea oxidation reaction (UOR) have always been attractive and urgent but still challenging. Herein, we report on a facile surface-engineering strategy of building hierarchical nickel hydroxide nanosheet@nanowire array on Ni foam (Ni(OH) 2 NS@NW/Ni foam) as anode material toward superior urea electrolysis. This Ni(OH) 2 based-catalyst with peculiar nanosheet@nanowire configuration just requires a small potential of 0.34 V ( vs. SCE) to drive 10 mA cm −2 in 1.0 M KOH with 0.33 M urea, which outperforms the one with pure nanosheet array architecture and even the commercial Pt/C catalyst. Further, a two-electrode electrolysis system is built here with the cathode of cobalt phosphide nanowire array on Ni foam (Co 2 P NW/Ni foam) and anode of Ni(OH) 2 NS@NW/Ni foam for overall urea electrolysis, which needs a low voltage of 1.58 V to drive 5 mA cm −2 in 1.0 M KOH with 0.33 M urea. Note that, the current density presented in this work is based on the real surface area of Ni foam but not the geometric area, unless otherwise specified.
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CHINESE JOURNAL OF CATALYSIS
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2018
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IF 3.525
Bing Zhang,Danping Hui,Yingxuan Li,He Zhao,Chuanyi Wang
The nickel-based complex Ni-CH 3 CH 2 NH 2 -intercalated niobate layered perovskite Ni-CH 3 CH 2 NH 2 /H 1.78 Sr 0.78 Bi 0.22 Nb 2 O 7 was synthesized via a facile in situ chemical reaction method. Using ultrathin H 1.78 Sr 0.78 Bi 0.22 Nb 2 O 7 nanosheets and nickel acetate as precursors. The composition, structure, photophysical properties, and photocatalytic activity for H 2 production of Ni-CH 3 CH 2 NH 2 /H 1.78 Sr 0.78 Bi 0.22 Nb 2 O 7 were studied systematically. The photocatalyst loaded with 0.5 wt% Ni exhibited the highest H 2 evolution rate of 372.67 μmo/h. This was 0.54 times higher than the activity of the H 1.78 Sr 0.78 Bi 0.22 Nb 2 O 7 nanosheets. The activity of the optimized Ni-CH 3 CH 2 NH 2 /H 1.78 Sr 0.78 Bi 0.22 Nb 2 O 7 was comparable to that of the Pt-loaded sample under the same reaction conditions. The photocatalytic activity of the Ni-CH 3 CH 2 NH 2 /H 1.78 Sr 0.78 Bi 0.22 Nb 2 O 7 was mainly attributed to the excellent separation of photogenerated carriers, after formation of the intercalated complex Ni-CH 3 CH 2 NH 2 . This study provides a facile strategy to synthesize a non-precious metal-loaded photocatalyst for H 2 production.
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JOURNAL OF THE ENERGY INSTITUTE
·
2024
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IF 5.6
Bowen Luo,Xiaoxin Chen,Yongxiang Guo,Riyang Shu,Chao Wang,Jianping Liu,Junyao Wang,Zhipeng Tian,Ying Chen
Hydrodeoxygenation (HDO) is a crucial technique for upgrading biomass-derived compounds, playing a significant role in the advancement of sustainable energy technologies. Under harsh reaction conditions, conventional HDO catalysts often suffer from reduced efficiency due to particle aggregation. This study presents a highly efficient Ni/Al 2 O 3 -C catalyst that mitigates this issue by stabilizing Ni metal particles and enhancing metal-support interactions. Characterization of the catalyst was carried out using XRD, TEM, and CO-TPD, which revealed that the incorporation of Al species improved metal dispersion and reduced the size of the Ni particles. Guaiacol, a phenolic compound derived from lignin, was chosen to evaluate the HDO performance under mild conditions. The optimized Ni/3Al 2 O 3 -5C catalyst achieved a guaiacol conversion of 99.9 % with a cyclohexane selectivity of 99.8 % at 210 °C. The outstanding performance is attributed to the high hydrogenation capacity of the small Ni particles and the acid sites on the carbon surface. Metal-support interactions stabilize the Ni particles, preventing leaching and deactivation. The catalyst has also exhibited comparable effectiveness in the HDO of both lignin-derived compounds and lignin-oils, confirming its adaptability across various substrates. The study demonstrates that Al 2 O 3 -C plays a crucial role in enhancing both the structural stability and catalytic efficiency of HDO catalysts, offering a promising approach for upgrading biomass-derived compounds.
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Batteries-Basel
·
2025
·Vol. 11
·期 3
·83
·
IF 4.8
Yongli Tong,Baoqian Chi,Yu Jiang,Xiang Wu
It is crucial for energy storage devices to construct electrode materials with excellent performance. However, enhancing energy density and cycling stability for supercapacitors is a significant challenge. We successfully synthesized CoNi2S4@Ni(OH)2nanosheets on the surface of Ni foam substrate by a two-step hydrothermal approach. The obtained products exhibit a remarkable areal capacitance of 1534 F g−1at a current density of 1 A g−1. Moreover, even after 10,000 cycles, the specific capacitance remains 90% of its initial value, highlighting the exceptional long-term stability and durability. Furthermore, an asymmetric supercapacitor (ASC) device incorporating the CoNi2S4@Ni(OH)2material shows remarkable electrochemical performance. It delivers an energy density of 58.5 mW h g−1at a power density of 2700 W kg−1. The outstanding performance mainly arises from the selection of materials, the design of the structure, and the synergistic interaction between the materials. The result suggests that this material holds great potential as an energy storage material.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Weigao Zhong,Qiming Sun,Lin Lv,Yong Han,Zhanghua Hong,Guohua Wang,Xiang Ao,Yuling Zhai,Tao Zhu,Xing Zhu,Hua Wang,Kongzhai Li,Zhishan Li
The exploration and rational design of high-performance, durable, and non-precious-metal bifunctional oxygen electrocatalysts are highly desired for the large-scale application of overall water splitting. Herein, an effective and straightforward coupling approach was developed to fabricate high-performance bifunctional OER/HER electrocatalysts based on core–shell nanostructure comprising a Ni/Ni3N core and a NiFe(OH)x shell. The as-prepared Ni/Ni3N@NiFe(OH)x-4 catalyst exhibited low overpotentials of 57 and 243 mV at 10 mA cm–2 for the HER and OER in 1.0 m KOH, respectively, superior to most bifunctional oxygen electrocatalysts reported so far. Compared to the unmodified Ni/Ni3N, the Ni/Ni3N@NiFe(OH)x-4 catalyst exhibited a 43.3-fold increase in mass activity for the OER and an 8.7-fold increase for the HER, as well as a 29.5-fold increase in intrinsic activity for the OER and a 2.6-fold increase for the HER. When employed as both the cathode and the anode of the electrolyzer for the overall water splitting reaction, its voltage was reduced to 1.58 V at 10 mA cm–2. This surface reconstruction method increased the electrochemically active surface area and enhanced the catalytic activity. Furthermore, in situ Raman spectroscopy revealed that the Fe etching reduced the onset potential for the active phase NiOOH, promoted its formation, and accelerated the reaction kinetics, thereby enhancing the overall electrocatalytic performance of the catalyst.
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PubMed
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CATALYSIS TODAY
·
2024
·
IF 5.2
Hairui Jiao,Guifeng Xu,Yushuai Sang,Hong Chen,Yongdan Li
Herein, we reported a one-pot method that directly converting enzymatic hydrolysis lignin (EHL) into cycloalkane fuels using a Ni catalyst derived from Ni-Al hydrotalcite (NiAl-LDH). The effects of Ni/Al ratio and reduction condition on the catalytic activity have been examined. The catalyst obtained from the reduction of NiAl-LDH at 460 °C (Ni 2 Al 1 -re460) shows the highest activity among the catalyst samples examined, attributed to its abundant Lewis acidic sites, small-sized Ni metal particles, and large specific surface area. At optimized reaction conditions (320 °C, 3 MPa H 2 , 6 h), this catalyst achieves 100% EHL conversion and complete oxygen removal and improves the calorific value of the products from 25.0 MJ kg −1 to 42.5 MJ kg −1 . The detected products are cycloalkane dimers and monomers with their carbon numbers within the range suitable for gasoline and diesel, and other large molecules with uncertain structures also predominantly consist of cycloalkane rings.
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