ACS Applied Materials & Interfaces
·
2022
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IF 10.383
Chao Miao,Shumei Chen,Kaixuan Shang,Lixing Liang,Jing Ouyang
The dry reforming of methane (DRM) is a new potential technology that converts two major greenhouse gases into useful chemical feedstocks. The main challenge faced by this process is maintaining the catalyst with high catalytic activity and long-term stability. Here, a simple and effective preparation route for the synthesis of functional nanomolecular sieve catalysts (NiRuxCZZ5) from kaolinite tailings was developed for dry reforming of methane with CO2. The silica monoliths with flower-like spherical and micropore structures (ZSM-5) were prepared by crystal growth method, and the metal components were loaded by ultrasonic-assisted impregnation method. The NiRu0.5CZZ5 catalyst exhibited excellent catalytic performance (maxmium CO2 and CH4 conversions up to 100 and 95.6%, respectively) and very good stability (up to 100h). The interfacial confinement and the strong support interaction are principally responsible for the excellent catalytic activity of the catalyst. The in situ DRIFTS was used to elucidate the possible carbon conversion steps, and stable surface intermediates were also identified.
研究领域:
催化化学
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材料科学
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环境工程
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产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2019
·Vol. 27
·期 2
·799-823
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IF 3.917
Lv Wei,Liao Yuhe,Zhu Yuting,Liu Jing,Zhu Changhui,Wang Chenguang,Xu Ying,Zhang Qi,Chen Guanyi,Ma Longlong
The cleavage of linkages of lignocellulose is important for its valorization. The linkage cleavage of cornstalk hydrolysis residue was investigated over catalysts (Ru/C + MgCl 2 ) in EtOAc/H 2 O solvents. The results show that almost hydrogen bonds, C–C bonds, ether and ester bonds in the matrix of lignin and cellulose were broken, accompanying 80.6% of lignin and 98.5% of cellulose conversion, and obtaining 37.5% of aromatic monomers and 28.8% of lignin oligomers. In the reaction system, biphasic EtOAc/H 2 O solvents exhibited an effect on cleaving the intermolecular linkages between lignin and cellulose. MgCl 2 showed limited abilities of breaking the α-O-4 and β-O-4 linkages in lignin and limited β-1, 4-glycosidic and hydrogen bonds in cellulose were cleaved over Ru/C catalyst. The cleavage of C–O linkages (α-O-4, β-O-4, 4-O-5) and C–C bonds (α-β, β-5) in lignin were mainly dependent on Ru/C catalyst. Much C–O and the stubborn C–C linkages of β-5, β-1 and 5-5 were significantly disrupted by the synergistic effect between MgCl 2 and Ru/C. However, MgCl 2 exhibited great contribution to breakage of β-1, 4-glycosidic linkage, hydrogen bonds and sugar ring of cellulose. The linkage of β-1, 4-glycosidic, hydrogen bonds and C–C in C5/C6 sugars were significantly broken. The increased yield of products was evidently due to the synergistic effect of Ru/C combined with MgCl 2 .
研究领域:
生物质化学
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催化化学
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产品关联
DOI
高影响因子
RARE METALS
·
2024
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IF 9.6
Cai Jia-Lin,Fan Jing-Yi,Zhang Xu-Dong,Xie Xin,Tian Wan-Yu,Zhang Xin-Gang,Ding Jie,Liu Yu-Shan
Efficient bifunction electrocatalyst is extremely interesting for electrochemical overall water splitting (OWS). Herein, a new RuO 2 -Ru/MoO 2 @CC (RRM/CC) bifunctional electrocatalyst was prepared via a solid phase reaction strategy. To obtain a suitable precursor for SPR, MoS 2 nanosheets and RuO 2 nanoparticles (NPs) were sequentially loaded onto carbon cloth conductive substrate. Subsequently, the prepared RuO 2 /MoS 2 /CC precursor was sealed in a furnace and annealed in Ar to trigger the redox SPR. After SPR, active RuO 2 -Ru/MoO 2 units containing metal–metal oxide interfaces were formed on CC substrate uniformly. The optimized RRM/CC sample annealed at 400 °C exhibited a overpotential of 13 mV for hydrogen evolution reaction (HER) and 231 mV for oxygen evolution reaction (OER) at 10 mA·cm −2 under alkaline condition, respectively, which can be deduced to the modulated electronic structure and unique hierarchical structure. In addition, a low cell voltage of 1.48 V for OWS was required at 10 mA·cm −2 under alkaline condition. Meanwhile, RRM/CC exhibited excellent pH-independent durability. Graphical abstract
研究领域:
材料科学
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电化学
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DOI
高影响因子
FUEL
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2022
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IF 8.035
Zhuojie Zhong,Junxuan Li,Minyin Jian,Riyang Shu,Zhipeng Tian,Chao Wang,Ying Chen,Ning Shi,Yanxue Wu
Hydrodeoxygenation (HDO) reaction is a necessary refinery process for lignin-derived phenolic compounds to be used as high quality liquid fuels. Catalyst morphology makes a big difference on the HDO performance through changing the properties of metal site and acid site, while the catalytic mechanism is still not very clear. In this work, four kinds of Ru/TiO 2 catalysts with different morphology were prepared by photochemical method and all of them achieved a high Ru metal dispersion. A series of catalyst characterizations were carried out, including XRD, BET, SEM, TEM, H 2 -TPD and NH 3 -TPD, in order to explore the crystal structure, surface property, Ru metal dispersion, hydrogen adsorption capacity as well as acid properties. Results showed that Ru/TNP catalyst possessed a large surface area, an abundance of medium strength acid sites and a good hydrogen adsorption capacity. The HDO performances on lignin-derived phenolic compounds were also compared, in which Ru/TNP catalyst presented the best HDO performance. The guaiacol conversion and the selectivity of cyclohexane product were both close to 100 % at 250 °C under 1 MPa hydrogen pressure. Moreover, the content of hydrocarbons increased from 11.1 % to 60.8 % in the lignin-oil upgrading process.
研究领域:
化学工程
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催化科学
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产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 27
·16311-16318
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IF 3.108
Yue Yang,Qiying Liu,Dan Li,Jin Tan,Qi Zhang,Chenguang Wang,Longlong Ma
Selective hydrogenation of 5-hydroxymethylfurfural (HMF) has potential application in high quality biofuels. Herein, the catalytic hydrodeoxygenation (HDO) of HMF to 2,5-dimethylfuran (DMF) was investigated using bi-functional Ru–MoOx/C catalyst prepared by initial wetness impregnation. The high dispersion and electronic transfer between Ru and MoOx were demonstrated by a series of characterization techniques. During this HDO process, the synergy effect between metallic Ru and acidic MoOx species in the Ru–MoOx/C catalyst plays an essential role in obtaining maximized target product DMF (79.4%) via effective aldehyde group hydrogenation by Ru followed by dehydration over MoOx. This work also elucidated that DMF production proceeded through two distinct pathways: the 2,5-hydroxymethyl furan intermediate was preferable by the aldehyde group hydrogenation of HMF over the Ru–MoOx/C catalyst. Over MoOx/C catalyst, comparatively, 5-methyl furfural was the key intermediate by direct hydrogenolysis of the hydroxyl group in HMF. This kind of catalyst is stable for the first two runs by maintaining the target product yield. After the third run, the catalyst showed deactivation gradually but could be almost completely recovered after regeneration by H2 reduction.
研究领域:
催化
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化学工程
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生物燃料生产
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2013
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IF 5.825
Yanhong Zu,Panpan Yang,Jianjian Wang,Xiaohui Liu,Jiawen Ren,Guanzhong Lu,Yanqin Wang
Ru/Co 3 O 4 catalyst prepared by a simple coprecipitation method, was used to catalyze the conversion of 5-hydroxymethylfurfural (HMF) into 2,5-dimethylfuran (DMF) for the first time and exhibited excellent catalytic performance. 93.4% yield of DMF was achieved at relatively low reaction temperature and H 2 pressure (130 °C, 0.7 MPa). Further studies showed that Ru is responsible for hydrogenation, while CoO x species played important role in the hydrogenolysis of hydroxyl groups. Besides, this catalyst also displayed a good reusability and can be used for 5 times without loss of the activity.
研究领域:
化学工程
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催化化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
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IF 5.816
Wenkai Huang,Fuhua Xu,Xiang Liu
Sodium borohydride has been widely regarded as a promising hydrogen carrier owing to its greatly hydrogen storing capability (10.8 wt%), high weight density and excellent stability in alkaline solutions. Herein, we first design and synthesize a series of bimetallic M-Ru/C nanocomposites (including Fe–Ru/C, Co–Ru/C, Ni–Ru/C and Cu–Ru/C), via simply alloying of commercial Ru/C with nonprecious metal, for superior H 2 evolution from the NaBH 4 hydrolysis. The result exhibits that H 2 generation is synergetically improved by alloying Ru/C with Co or Ni, while it is hindered by alloying Ru/C with Fe or Cu. Indeed, Co–Ru/C presents the highest efficient catalytic activity for H 2 generation, with the TOF of 117.69 mol(H 2 )·mol Ru −1 ·min −1 , whereas Ru/C is only 57.08 mol(H 2 )·mol Ru −1 ·min −1 . In addition, the TOF of Co–Ru/C reaches to 436.51 mol(H 2 )·mol Ru −1 ·min −1 (96.7 L(H 2 )·g Ru −1 ·min −1 ) in the presence of NaOH.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
TALANTA
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2014
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IF 3.511
Xiaomei Chen,Limin Zhao,Xiaotian Tian,Sai Lian,Zhiyong Huang,Xi Chen
A novel method for the determination of tetracyclines (TCs) using electrochemiluminescence (ECL) based on a Ru(bpy) 3 2+ -doped silica nanoparticles (RuSiNPs)/Nafion film modified electrode is presented in this paper. The RuSiNPs were prepared by a water-in-oil microemulsion method. The characterization results indicated that the thus-prepared RuSiNPs presented a uniform size of 45 nm and retained the original electrochemical properties of Ru(bpy) 3 2+ . Importantly, the ECL response on RuSiNPs/Nafion film modified electrode was greatly enhanced by TCs. Under the optimum conditions, the ECL intensity versus the concentration of TCs was found to be linear over the range of 1–100 μmol L −1 for tetracycline (TC), 0.1–100 μmol L −1 for oxytetracycline (OTC) and 1–100 μmol L −1 for chlortetracycline (CTC). The detection limits ( S / N =3) were 0.23 μmol L −1 for TC, 0.10 μmol L −1 for OTC and 0.16 μmol L −1 for CTC. Moreover, due to the electrostatic interaction between Ru(bpy) 3 2+ and silica matrix, the leaching of Ru(bpy) 3 2+ was greatly reduced, therefore, the ECL sensor exhibited excellent repeatability and stability in the detection of TCs. Based on these investigations, the proposed ECL approach was successfully used to analyze the TCs content in drugs.
研究领域:
分析化学
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药物分析
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生物传感
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DOI
高影响因子
ANALYST
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2012
·Vol. 137
·期 19
·4428-4434
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IF 4.23
Cen Xiong,Zhiyou Xiao,Manjun Zhang,Liansheng Ling
A sensor for H2O2 and H2O2-related reactant was constructed with oligonucleotides and Ru(bipy)2dppx2+ (bipy = 2,2′-bipyridine, dppx = 7,8-dimethyl-dipyridophenazine), which was performed by converting the H2O2-induced DNA cleavage into the change of luminescence. The ‘DNA light switch’ Ru(bipy)2dppx2+ could emit strong luminescence in the presence of dsDNA. DNA cleavage occurred upon addition of H2O2 due to the Fenton reaction, which resulted in the decrease of the luminescence of Ru(bipy)2dppx2+. Therefore, the luminescence intensity depended on the concentration of H2O2 and H2O2-related reactants, and the detection limits for H2O2, uric acid and cholesterol were 0.20 μM, 0.46 μM and 1.25 μM, respectively. The recovery varied between 94.0% and 105.0% when the assay was applied to the determination of uric acid and cholesterol in biological samples, which demonstrated the good practicability of the assay.
研究领域:
分析化学
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生物化学
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传感器
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2023
·
IF 2.8
Zhen-Xing Yang,Fang-Fang Ye,Ding Pan,Guang-Xu Yan,Shao-Hui Guo
Acrylonitrile wastewater was an organic wastewater with strong toxicity and poor biodegradability. Therefore, electro-catalytic technology became a promising acrylonitrile wastewater treatment technology because of no secondary pollution, wide application range and low water quality requirements. The optimal Mn-Sn modified Ru-Ir electrode material was synthesized by thermal method and applied in electro-catalytic treatment of acrylonitrile wastewater. The electrode materials were characterized by SEM, TEM, XRD, XPS and electrochemical characterization. SEM, TEM, XRD and XPS indicated that Mn and Sn were capable of incorporating and replacing the part of Ru or Ir and could alter the microstructure of Ru-Ir and the types of Mn and Sn oxides, raising the oxygen evolution potential (OEP) and voltampere charge. When the molar ratio of Mn-Sn was 1:1, OEP, voltampere charge and exchange current density could reach 1.303 V, 1.51 C/cm2 and 6.29×10-4 A/cm2, respectively. The co-doping of Mn-Sn had significant influence on the electrocatalytic performance of Ru-Ir electrode materials. The optimum synthesis conditions of Mn-Sn modified Ru-Ir electrode were as follows: the molar ratio of Mn-Sn was 1:1, calcination time was 4.0 hours, calcination temperature was 450℃, and solvent was water. Under certain conditions, the removal rate of acrylonitrile with Mn-Sn modified Ru-Ir electrode was 100%. Mn-Sn modified Ru-Ir electrode had high oxygen evolution potential and good removal effect of acrylonitrile, which was higher than that of ruthenium iridium electrode and RuO2 electrode.
研究领域:
环境科学
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材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
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IF 13.2
Hang Xu,Mingjing Ge,Yin Liu,Chen Yao,Houzhen Zhou,Mingmei Ding,Yang Li
Singlet oxygen ( 1 O 2 ) is an electrophilic oxidant capable of selectively eliminating contaminants in complex wastewater, which is highly expected in environmental remediation. However, due to the limitations in synthesizing catalysts with well-defined adsorption and active sites, the efficient and selective generation of 1 O 2 remains challenging. Herein, isolated Ru-O 3 moiety decorated two-dimensional Ti 3 C 2 T x catalysts (Ru-SA/Ti 3 C 2 T x ) were prepared to regulate 1 O 2 generation via peroxymonosulfate (PMS) activation. The constructed catalysts with asymmetric dual-metal structures (Ti-O-Ru) exhibited surprising mass activity of 1.4 × 10 4 min −1 ·mol −1 with a high 1 O 2 generation selectivity of 98.3 %. Mechanism inquiry indicated that the enhanced adsorption and electron transfer between PMS and Ru-SA/Ti 3 C 2 T x attributed to the synergistic effect of the strong adsorption at the Ru sites and the rapid electron transfer in the asymmetric Ti-O-Ru structures. Theoretical calculations demonstrated that Ru-O 3 moiety decreased the formation energy barrier of key intermediate *O, thus converting to a 1 O 2 -dominated oxidation path. Two possible degradation pathways of tetracycline hydrochloride (TCH) were proposed by gas chromatography-mass spectrometry (GC–MS), and the toxicities of intermediates were significantly decreased due to the strong electrophilic attack of 1 O 2 . This study deepened the understanding of the specific contribution of individual sites in multi-site synergistic, which furnished implications for the design and optimization of Fenton-like catalysts.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 16
·7583-7587
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IF 3.3
Baole Li,Tiansheng He,Chen Zuo,Zhi Cao,Taihong Yan,Weifang Zheng
Catalytic decomposition of hydrazine nitrate is a very important research topic in the environmental protection field. Herein, we used an Ru/C catalyst for the decomposition of hydrazine nitrate in HNO3, and the reaction kinetics and mechanism were studied in detail. The kinetics study of the decomposition of hydrazine nitrate (0.01 M) was conducted in the temperature range 313–343 K in 0.1 M HNO3 in the presence of Ru/C. The apparent activation energy for this reaction was 46.6 kJ mol−1 according to a fitting of the experimental data, while the reaction order was 1.5. It was also found that the reaction pathway of the catalytic decomposition of hydrazine nitrate on the Ru/C catalyst involved two processes: heterogeneous catalytic disproportionation of hydrazine nitrate at the catalyst surface and oxidation of hydrazine nitrate with catalytically generated HNO2.
研究领域:
环境科学
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催化化学
✓ 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）