FUEL
·
2022
·
IF 8.035
Mingxing Zhao,Jun Hu,Ping Lu,Shiliang Wu,Chao Liu,Yahui Sun
Efficient hydrodeoxygenation of lignin-derived bio-oils to cycloalkanes was achieved over bifunctional RuCoW x /NC catalyst prepared by in situ pyrolysis method. The performance of RuCoW x /NC was investigated in HDO of 4-propylguaiacol, considering the influences of catalysts, initial H 2 pressure, and reaction temperature. Catalyst screening reveals that RuCoW 0.03 /NC afforded the highest propylcyclohexane yield of 71.3% from 4-propylguaiacol at 220 ℃. At 240 ℃, the yield of propylcyclohexane increased to 95.2 %. The heavy fraction of rice husk bio-oil, primarily composed of lignin-derived phenolic compounds, could be upgraded to 98.3% hydrocarbons at 280 ℃ over RuCoW 0.03 /NC. The synergistic interaction between highly dispersed Co and Ru metal sites and WO x acidic sites is responsible for the excellent HDO activity of RuCoW 0.03 /NC. Besides, RuCoW 0.03 /NC exhibited high stability after four cycles.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Yang Luo,Yao Tian,Shiyu Yang,Jing Jiang,Aike Liu,Hejun Gao,Lunhong Ai
Efficient and controllable release of hydrogen from solid hydrogen storage materials is a promising way to produce hydrogen safely and on-demand. The development of economical, highly active, easily recyclable catalysts is critical for practical applications, which remains a great challenging. Herein, the easily controllable and cost-effective corrosion strategy is ingeniously developed to simply prepare ultralow-content ruthenium coupled with nickel hydroxide on nickel foam (Ru–Ni–NF). After experiencing the spontaneous oxidation-reduction reactions between the reactive NF and Ru 3+ , ultrafine Ru nanoparticles decorated nickel hydroxide nanosheets are in situ intimately grown on porous NF networks. The optimal Ru–Ni–NF catalyst exhibits the excellent performance for catalytic hydrolysis of ammonia borane with a high turnover frequency (TOF) of 539.6 mol H2 mol Ru −1 min −1 at 298 K and a low apparent activation energy of 36.4 kJ mol −1 , due to the synergistic effect between Ru nanoparticles and nickel hydroxide nanosheets. Furthermore, the Ru–Ni–NF catalyst possesses easy separation and outstanding durability, which is superior to powdered catalysts. This study provides a facile and economical strategy for the preparation of ultralow-content noble metal supported metal foam-type catalysts for dehydrogenation of ammonia borane.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Hai Liu,Guoying Tan,Mengxuan Li,Zhuang Zhang,Marshet Getaye Sendeku,Yaping Li,Yun Kuang,Xiaoming Sun
Hydrogen evolution reaction is an important half-cell reaction in electrocatalytic water splitting process, which is an efficient way to store renewable energy into hydrogen fuel. However, grid scale water splitting always require high current densities up to amperes per square centimeter, which results change in local pH on the electrode surface, leading to instability risk of cathodic catalyst. Herein, a single atomic Ru doped WO 3 catalyst was fabricated, which exhibit excellent hydrogen evolution reaction (HER) activity with only 28.0, 17.6, and 83.0 mV in acidic, alkaline, and neutral media respectively as well as robust stability for 100 h at ampere-level current density is reported. Synchrotron radiation and density functional theory (DFT) calculations revealed that the defective oxygen and strong electron transfer from W sites to Ru not only achieved moderate H adsorption but also protected Ru sites from agglomeration, leading to superior HER activity and stability at industrial current density.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Le Gou,Longfei Xie,Yuanyuan Wang,Liyi Dai
The production of amine intermediates from biomass is capturing increasing attention. Herein, an efficient conversion of furfural to furfural amine over RuCo/AC catalyst under hydrothermal conditions has been investigated. The effects of different carriers, bimetals, and reaction conditions were systematically investigated in green solvents (water). Fully conversion of furfural and high furfural amine yield (92.13%) at 80 ℃ for 1 h over 4Ru1Co/AC. The excellent catalytic performance of 4Ru1Co/AC was attributed to its high acidity and good hydrogenation ability, as well as the synergistic effect between Ru-Co alloy formations and the activated carbon. Importantly, the highly selective preparation of furfural to furfural amine is a promising way to high-value utilization of cellulosic biomass in green solvents.
研究领域:
化学工程
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催化反应
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Zixuan Wang,Yonglong Wang,Juping Wang,Weiping Xiao,Guangrui Xu,Zhenjiang Li,Chunlong Dai,Huadong Zhang,Zexing Wu,Lei Wang
Designing highly efficient catalysts act as a key role for the green and sustainable hydrogen production through water electrolysis. In this work, hollow structured B-doped FeP nanospheres supported Ru (Ru/h-B-Fe-P) is developed by low temperature phosphorization, acid etching and following microwave treatment approach. The hollow structure, abundant defects and electronic interactions between Ru and FeP can favour the mass transport and boosting the reaction kinetics toward all-pH hydrogen evolution reaction (HER). Then, Ru/h-B-Fe-P achieves excellent catalytic activities in acidic, neutral, alkaline, and alkaline seawater electrolytes with only 56 mV, 79 mV, 88 mV and 99 mV to drive 10 mA cm −2 with remarkable stability. This work indicates that decorated noble metals onto specific nanostructured matrix is a promising approach to enhance the catalytic activities.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2023
·Vol. 7
·期 20
·5156-5165
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IF 5.6
Yong Liu,Lungang Chen,Dongfeng Chi,Chenguang Wang,Xinghua Zhang,Jianguo Liu,Qi Zhang,Longlong Ma
The conversion of fructose, derived from biomass, into 1,2-propanediol (1,2-PDO) offers a promising approach for reducing the carbon footprint and achieving high atom economy. However, effective regulation of this transformation to minimize side reactions remains a challenge. In this study, a biochar supported RuWCu catalyst was developed demonstrating high activity of converting fructose to 1,2-propanediol with a favorable yield of 48.1% under optimized reaction conditions of 4 MPa H2, 210 °C, and 3 h. The calcination temperature and reduction temperature affected the states of Ru, W, and Cu, which in turn affected the metal–acid sites. Optimal results were obtained with a calcination temperature of 400 °C and a reduction temperature of 300 °C, resulting in a high yield of 1,2-PDO. The Ru0.5W36Cu7/biochar showed a good reuse potential with negligible activity loss after the fifth run. These findings contribute to the development of efficient catalysts for biomass conversion and highlight the potential of biochar-supported catalysts in sustainable chemical transformations.
研究领域:
化学工程
·
可再生资源与环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Xiaoqing Gao,Shanhui Zhu,Mei Dong,Jianguo Wang,Weibin Fan
Highly efficient synthesis of valuable γ-valerolactone (GVL) by levulinic acid (LA) hydrogenation is still a challenge for Ru-based catalysts under mild condition. In this work, we have reported that ultrathin TiO 2 nanosheets supported Ru nanoparticles showed extraordinarily high catalytic activity, GVL yield (99.1%) and reusability owing to the formation of Ru O Ti interfacial structure. The turnover frequency (TOF) reached as high as 19,045 h −1 at 100 °C, much higher than those of Ru/SiO 2 , Ru/GO, Ru/MoS 2 , and commercial Ru/C. DFT calculation elucidates that the dominant reaction pathway of LA hydrogenation to GVL is preferentially hydrogenated to CH 3 CHOCH 2 CH 2 COOH*, followed by cyclization to CH 3 (OH)C 4 OH 4 OH* (GVL − OH) and final dehydroxylation, irrespective of surface structure. Compared to Ru (0 0 2) facet, Ru/TiO 2 interfacial structure changes the rate-determining step from initial hydrogenation to cyclization, which greatly declines the activation barrier from 0.81 eV to 0.48 eV.
研究领域:
化学工程
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材料科学
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催化反应
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
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IF 7.489
Suci Meng,Pengfei An,Lijie Chen,Shichao Sun,Zhongkai Xie,Min Chen,Deli Jiang
Developing high-efficient and low-cost photocatalysts is of great significance yet challenging for photocatalytic hydrogen evolution. Herein, we report a 2D/2D Ru-modulated CoP nanosheets (Ru-CoP -x , where x refers the Ru-to-Co molar ratio)/g-C 3 N 4 nanosheets (GCN NSs) ternary hybrid as a photocatalyst for hydrogen evolution under visible light. The optimal photocatalyst 25% Ru-CoP-1:8/GCN NSs exhibits an excellent hydrogen evolution rate of 1172.5 µmol g −1 h −1 under visible light with a high apparent quantum efficiency (AQE) of 3.49% at 420 nm, which is close to Pt/g-C 3 N 4 photocatalytic system and higher than most reported transition metal phosphides (TMP)/g-C 3 N 4 photocatalytic system. Experimental results indicate that the higher photocatalytic hydrogen evolution performance can be mainly attributed to the binary Ru-CoP -x co-catalyst with efficient charge separation and promoted surface water reduction kinetics, and the 2D/2D self-assembly structure with strong interface Schottky effect and short charge transport distance. This study provides a new approach to develop cost-effective Pt-alternative co-catalysts for photocatalytic hydrogen evolution by incorporating a small amount of ruthenium into the transition metal phosphides.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2016
·Vol. 7
·期 1
·213-221
·
IF 5.287
Xiaolong Liu,Junlin Zeng,Wenbo Shi,Jian Wang,Tingyu Zhu,Yunfa Chen
In this work, ruthenium-based bimetallic catalysts of the formula Ru–5M/TiO2 (M = Mn, Co, Ce, Cu, Fe) were prepared and evaluated in benzene oxidation, and Ru–5Co/TiO2 exhibited the lowest complete oxidation temperature (220 °C), demonstrating Co3O4 as the best dopant. The influence of the Ru and Co contents on the catalytic activity was also studied, and 1 wt% Ru and 5 wt% Co3O4 were confirmed. Water vapor showed an inhibition effect on benzene oxidation at 210 °C, whereas the catalytic efficiency was barely influenced at a higher temperature (230 °C). STEM analyses revealed that Ru–Co bimetallic species showed similar distributions on the catalytic surface. Based on the correlation of the catalytic results with various characterization techniques, the synergistic effect between Ru and Co was well demonstrated, and a four-step transformation in the oxidation process was concluded. Besides, systematic in situ FTIR studies for benzene oxidation over Ru/TiO2, Co/TiO2, and Ru–5Co/TiO2 were conducted and compared, and many organic intermediates were observed in the in situ FTIR spectra. Accordingly, the reaction mechanism for benzene oxidation over the Ru–Co bimetallic catalyst was proposed.
研究领域:
环境化学
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催化科学
·
有机污染物降解
✓ 已验证
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-11
·
IF 17.694
Zhang Yudi,Arpino Kathryn E.,Yang Qun,Kikugawa Naoki,Sokolov Dmitry A.,Hicks Clifford W.,Liu Jian,Felser Claudia,Li Guowei
Despite the fruitful achievements in the development of hydrogen production catalysts with record-breaking performances, there is still a lack of durable catalysts that could work under large current densities (>1000 mA cm −2 ). Here, we investigated the catalytic behaviors of Sr 2 RuO 4 bulk single crystals. This crystal has demonstrated remarkable activities under the current density of 1000 mA cm −2 , which require overpotentials of 182 and 278 mV in 0.5 M H 2 SO 4 and 1 M KOH electrolytes, respectively. These materials are stable for 56 days of continuous testing at a high current density of above 1000 mA cm −2 and then under operating temperatures of 70 °C. The in-situ formation of ferromagnetic Ru clusters at the crystal surface is observed, endowing the single-crystal catalyst with low charge transfer resistance and high wettability for rapid gas bubble removal. These experiments exemplify the potential of designing HER catalysts that work under industrial-scale current density.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Jiahuan Luo,Jing Wang,Yao Guo,Jiawei Zhu,Huihui Jin,Zhiwei Zhang,Daojun Zhang,Yongsheng Niu,Shaogang Hou,Jimin Du,Daping He,Yuli Xiong,Lei Chen,Shichun Mu,Yunhui Huang
Hydrogen generation from electrical water splitting has become a greatly increasing requirement for energy systems, however, highly effective and durable electrocatalysts towards universal-pH hydrogen evolution reaction (HER) remain a big challenge. Herein, we design and synthesize ruthenium di-phosphide (RuP 2 ) confined in carbon layers (RuP 2 -C) with a unique yolk-shell structure (RuP 2 -C@RuP 2 -C) from MOF . As expected, it not only exceeds the HER activity of Pt catalysts, with very tiny overpotentials at 10 mA cm −2 (9 and 17 mV in 1.0 M KOH and 0.5 M H 2 SO 4 , individually), but also has high stability. Besides, it also exhibits a low overpotential (40 mV) close to Pt catalysts and high stability in 1.0 M PBS, indicating that RuP 2 -C@RuP 2 -C (RPC@RPC) owns outstanding HER performance at all pH values. Density functional theory (DFT) calculation results further unravel that the P-site on the surface of RPC@RPC possesses low hydrogen adsorption energy, beneficial for boosting the HER activity.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Wenwei Zhang,Tianjin Li,Xinping Ouyang,Xueqing Qiu
To cope with the challenge of insufficient interaction between lignin macromolecules and catalytic active sites in heterocatalysis systems which hindered the efficient hydrogenolysis of lignin, a lignin-derived N-doped macroporous carbon supported Ru catalyst (Ru/LNPC) was prepared via the pyrolysis of alkali lignin with potassium hydroxide as the activator and ammonium oxalate as the pore forming agent. The LNPC carrier featured a hierarchical porous structure with the diameter of macropores ranging from 50 nm to 10 μm, enhancing the adequately contact between the lignin macromolecules and Ru NPs. The doping nitrogen in the carbon carrier led to well dispersed Ru nanoparticles with average size of 1.08 nm, providing abundant active metallic centers. Therefore, Ru/LNPC exhibited excellent catalytic activity and stability to hydrogenolysis of lignin. Under the condition of 1.0 MPa H 2 at 280 ºC for 2 h, Ru/LNPC contributed to the yield of 45.6 % aromatic monomers from the depolymerization of lignin. After five recycling, Ru/LNPC still showed significant activity. This work provided a new strategy for designing catalysts for efficient hydrogenolysis of lignin and further facilitating its high-value utilization.
研究领域:
化学工程
·
材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）