INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2014
·
IF 2.235
Lei Hu,Xing Tang,Jiaxing Xu,Zhen Wu,Lu Lin,Shijie Liu
A simple and efficient process was presented for the selective hydrogenation of 5-hydroxymethylfurfural (HMF) into the high-quality liquid fuel 2,5-dimethylfuran (DMF) in the presence of tetrahydrofuran (THF). Among the employed metal catalysts, the relatively inexpensive carbon-supported ruthenium (Ru/C) displayed the highest catalytic performance, which led to 94.7% DMF yield with 100% HMF conversion at a relatively mild reaction temperature of 200 °C for only 2 h. Although Ru/C had a little loss in the catalytic activity when it was used for five successive reaction runs, the partially deactivated Ru/C could be easily regenerated by heating at a mixed flow of H2 and N2. Moreover, the plausible mechanism involving an aldehyde group, a hydroxyl group, and a furan ring for the selective hydrogenation of HMF into DMF was also proposed. Subsequently, DMF was separated from the crude hydrogenation mixture according to their various boiling points by the combination of atmospheric distillation and vacuum distillation, and then, the chemical structures and physical properties of the separated DMF were confirmed to be consistent with the authentic DMF. More gratifyingly, Ru/C and THF were also found to be a good combination for the direct hydrogenation of carbohydrate-derived HMF into DMF, which is very important for the practical production of DMF from a variety of biomass-derived carbohydrates such as fructose, glucose, sucrose, maltose, cellobiose, starch, and cellulose.
研究领域:
化学工程
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能源科学
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催化科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2022
·
IF 18.027
Qirui Liang,Qizhen Li,Lei Xie,Hui Zeng,Shan Zhou,Yanan Huang,Miao Yan,Xin Zhang,Tianyi Liu,Jie Zeng,Kang Liang,Osamu Terasaki,Dongyuan Zhao,Lei Jiang,Biao Kong
Hydrogen evolution reaction (HER) through water splitting is a potential technology to realize the sustainable production of hydrogen, yet the tardy water dissociation and costly Pt-based catalysts inhibit its development. Here, a trapping–bonding strategy is proposed to realize the superassembly of surface-enriched Ru nanoclusters on a phytic acid modified nitrogen-doped carbon framework (denoted as NCPO-Ru NCs). The modified framework has a high affinity to metal cations and can trap plenty of Ru ions. The trapped Ru ions are mainly distributed on the surface of the framework and can form Ru nanoclusters at 50 °C with the synergistic effect of vacancies and phosphate groups. By adjusting the content of phytic acid, surface-enriched Ru nanoclusters with adjustable distribution and densities can be obtained. Benefiting from the adequate exposure of the active sites and dense distribution of ultrasmall Ru nanoclusters, the obtained NCPO-Ru NCs catalyst can effectively drive HER in alkaline electrolytes and show an activity (at overpotential of 50 mV) about 14.3 and 9.6 times higher than that of commercial Ru/C and Pt/C catalysts, respectively. Furthermore, the great performance in solar to hydrogen generation through water splitting provides more flexibility for wide applications of NCPO-Ru NCs.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Baoshan Teng,Chunhui Ma,Jiayu Chen,Yunlai Zhang,Baohuan Wei,Maohai Sang,Hui Wang,Yuhan Sun
Ammonia is recognized as the best carrier for hydrogen storage and transportation. Nanomaterial catalysts have eminent catalytic activity for ammonia decomposition. However, the preparation of low-loading, high-activity noble metal atomically dispersed nanometer ammonia decomposition catalysts and their reaction mechanisms remain obscure. In this work, we report the synthesis of a stable ruthenium (Ru) atomically dispersed catalyst with oxygen-rich defects achieved through hydrogen etching of the support CeO2NR nanorods. The oxygen defects result in the catalyst exhibiting a favorable low-temperature catalytic activity and an exceedingly high atom utilization rate for ammonia decomposition. The hydrogen production rate from ammonia decomposition per unit mass of Ru is as high as 2446 mmol H2 gRu–1 min–1 at 1 bar, 450 °C, and gas hour space velocity = 12,000 mL gcat–1 h–1. In this case, the highly dispersed Ru provided enough active sites, while the oxygen defects of the catalyst enhanced the electron transfer tunnel between Ru and the nanorod support under a Schottky contact model. The detailed mechanism of oxygen defects for improving the catalytic performance of ammonia decomposition was studied by DFT modeling. Thus, this work provides a promising strategy to improve the catalytic efficiency of an atomically dispersed Ru nanocatalyst.
研究领域:
材料科学
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催化化学
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理论化学
✓ 已验证
DOI
高影响因子
CATALYSIS LETTERS
·
2024
·
IF 2.3
Yan Xiaoxu,Zhao Xianfeng,Shao Xinxin,Li Kangpeng,Sun Minghong,Ji Xinpeng,Lu Huidan,Liu Yongping
Platinum-group metal ruthenium (Ru) is considered an ideal substitute for platinum (Pt) in the hydrogen evolution reaction (HER) due to its excellent electrocatalytic performance and cost that is 20 times lower than Pt. Herein, we prepared Ru-doped WO 3 nanosheets array on carbon cloth (CC) using the hydrothermal method, followed by successful high-temperature nitridation to obtain Ru-WN/CC nanoarray electrocatalysts. As prepared Ru-doped WN nanosheets exhibit a highly porous structure, providing abundant active sites for HER. Electrochemical performance tests demonstrate that compared to pristine WN/CC, 7% Ru-WN/CC exhibits a reduced overpotential of 94 mV at a current density of 10 mA cm -2 , with a Tafel slope of only 51.4 mV dec -1 and an Rct of 6.08 Ω. Moreover, it maintains high catalytic activity for at least 24 hours under acidic conditions. The superior electrocatalytic activity of Ru-WN/CC is attributed to the significant acceleration of the kinetic rate of WN electrocatalysts by Ru doping, the reduction of electronic transfer resistance in WN, and the enlargement of the electrochemically active surface area of WN. This study provides an important reference for the development of novel low noble metal-doped electrocatalytic materials and has guiding significance for the application of metal nitrides in water splitting for hydrogen production. Graphical Abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xitong Yang,Guowei Liu,Ruifeng Zhou,Zhengzheng Xie,Yamin Cheng,Muhammad Shuaib Khan,Qiuye Li
Catalytic desorption can reduce the activation energy of the reaction and increase the desorption reaction rate, and is one of the most promising technologies to solve energy consumption problems of CO 2 capture technology for organic amine solutions. In order to further reduce desorption energy consumption, we propose a new method of utilizing the photothermal effect of catalysts to increase desorption temperature and accelerate reaction kinetics, and coupling the proton transfer ability of the catalyst itself to form multifunctional catalysis. In this work, we synthesized Ru x Mn 1-x OOH catalyst by introducing Ru atoms at the Mn vacancies on the MnOOH surface, grasping the advantages of the photothermal and proton transfer ability of Ru-dopants. The results showed that the CO 2 desorption capacity increased by 43.1% with adding MnOOH compared to without a catalyst. The Ru-doped catalyst demonstrated a 54.7% increase in CO 2 desorption efficiency, with an additional 98.2% surge attributed to the in-situ photothermal effect generated by the catalyst under light irradiation. Characterization and density functional theory (DFT) calculations revealed that Ru doping significantly enhanced the proton transfer ability while simultaneously weakens the adsorption capacity of monoethanolamine (MEA) on the catalyst surface. Moreover, the stronger photothermal effect introduced by Ru leads to an increase in the surface temperature of the catalyst, which is key to the faster and efficient desorption of CO 2 . This work provides a new approach to improve the proton transfer ability of catalysts and offers a novel photothermal coupled catalytic scheme for CO 2 desorption in organic amine carbon capture technology.
研究领域:
化学工程
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催化材料
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·Vol. 21
·期 1
·2406022
·
IF 13
Jiamin Zhao,Meimei Kou,Qing Yuan,Ying Yuan,Jinsheng Zhao
Tungsten carbide (WC x ) is a promising alternative to platinum catalysts for hydrogen evolution reaction (HER). However, strong tungsten–hydrogen bond hinders hydrogen desorption while favoring H + reduction, thus limiting HER kinetics. Inspired by the phenomenon of hydrogen spillover in heterogeneous catalysis, a ruthenium (Ru) doped-driven activated hydrogen migration from WC x surface to Ru is reported. This approach achieved high activity with an ultralow overpotential of 9.0 mV at 10 mA·cm −2 and superior stability at an industrial-grade current density of 1.0 A·cm −2 @ 1.65 V. In situ attenuated total reflectance surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) and operando electrochemical impedance spectra revealed that this exceptional hydrogen production—which surpasses that of previously reported Pt/C catalysts—is attributable to the outstanding ability of WC x to induce water dissociation and hydrogen spillover from WC x to Ru surface. During the HER process, the rigid interfacial water network negatively affected the HER efficiency under alkaline conditions. The WC x sites disrupted this rigid structure, facilitating the contact between activated hydrogen (H * ) and WC x sites. Subsequently, H * migrates to Ru surface, where hydrogen recombination occurs to produce H 2 . This work paves a new avenue for the construction of coupled catalysts at the atomic scale to facilitate HER electrocatalysis.
研究领域:
电化学
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催化材料
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能源科学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2020
·Vol. 11
·期 5
·1914-1921
·
IF 5.721
Xiaoxiao Qin,Xueyan Chen,Min Chen,Jianghao Zhang,Hong He,Changbin Zhang
Formaldehyde (HCHO) elimination at low temperature is of great interest for indoor air purification. In this work, 1 wt% Ru supported on CeO2 and Al2O3 catalysts were prepared by an impregnation method and subsequently tested for the catalytic oxidation of HCHO at low temperature. The activity of the Ru/CeO2 catalyst was significantly superior to the Ru/Al2O3 catalyst, achieving complete conversion of 130 ppm HCHO at 90 °C with a GHSV of 100 000 mL gcat−1 h−1. Brunauer–Emmett–Teller (BET) measurements, X-ray powder diffraction (XRD), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), X-ray photoelectron spectroscopy (XPS) and H2-temperature-programmed reduction (H2-TPR) were carried out to characterize the physical and chemical properties of the catalysts. The results revealed that RuOx species, rather than Ru0, were directly responsible for the HCHO oxidation over Ru/CeO2, and the excellent performance of Ru/CeO2 was mainly attributed to the strong interaction between Ru and CeO2, which induced a high dispersion and high redox capacity of RuOx species. The reaction mechanism of HCHO oxidation was also investigated using in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS). It was shown that the HCHO oxidation over the Ru/CeO2 and Ru/Al2O3 catalysts followed the same pathway of the direct formate oxidation (HCHO → HCOO + OH → H2O + CO2).
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
Nuclear Science and Techniques
·
2020
·Vol. 31
·期 4
·1-13
·
IF 1.556
Zhang Shi-Chang,Ning Shun-Yan,Zhou Jie,Wang Si-Yi,Zhang Wei,Wang Xin-Peng,Wei Yue-Zhou
A porous silica-polymer-based adsorbent, iso Bu-BTP/SiO 2 -P, was prepared by a vacuum impregnation method and used for the recovery of ruthenium, rhodium, and palladium from nitric acid solution. The experimental results revealed that iso Bu-BTP/SiO 2 -P exhibited unique adsorption properties such as high saturation adsorption capacity (Ru: 0.35 mmol g −1 , Rh: 0.32 mmol g −1 , Pd: 1.05 mmol g −1 ) and excellent selectivity over other metal ions, such as lanthanides (SF PGM/ M > 40) in 1 M HNO 3 solution. The adsorption process conformed to the pseudo-second-order model and Langmuir model. From the UV, FTIR, and XPS analyses, it can be concluded that the strong affinity between functional groups (C–N=C) and metal ions as well as NO 3 − played a role in coordination during the adsorption process. Furthermore, the desorption behavior was studied, and it was found that the adsorbed Pd, Rh, and Ru could be eluted with a 0.01 M nitric acid–0.1 M thiocarbamide solution, 5 M hydrochloric acid, and sodium hypochlorite (CP) solution, respectively. Finally, based on those findings, a simple process for the separation and recovery of Pd, Rh, and Ru from high-level liquid waste using iso Bu-BTP/SiO 2 -P was designed and proposed.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Min Jiang,Yilin Gao,Zhaoyu Wang,Zhengxin Ding
Spinel CuCo 2 O 4 nanoplates were synthesized through a solvothermal method coupled with a calcination treatment in air. The prepared CuCo 2 O 4 samples were fully characterized by diverse physical and chemical techniques including powder X-ray diffraction (XRD), field emission scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and N 2 sorption measurement. The CuCo 2 O 4 material was developed as an efficient, low-cost and stable cocatalyst to boost photochemical CO 2 conversion with Ru(bpy) 3 2+ as a homogeneous photosensetizer. The catalytic performance of the CuCo 2 O 4 samples was evaluated toward visible-light-driven deoxygenative reduction of CO 2 to CO under mild conditions. Various parameters of the reaction system and the synthesis conditions of CuCo 2 O 4 were investigated and optimized to maximize the catalytic performance of CO 2 reduction system. The stability and the reusability of the CuCo 2 O 4 cocatalyst were examined. Moreover, the CuCo 2 O 4 cocatalyst was further proved to be highly active to promote CO 2 photoreduction catalysed by CdS semiconductor as a heterogeneous light harvester, and markedly reinforced photocatalytic CO 2 reduction performance was achieved.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yanqin Xue,Qing Yan,Xiaojing Bai,Yanyan Xu,Xuan Zhang,Yiju Li,Kai Zhu,Ke Ye,Jun Yan,Dianxue Cao,Guiling Wang
The development of efficient bifunctional catalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is essential for reducing the cost of hydrogen production by water splitting. Herein, hollow microtubes composed of RuNi 1 Co 1 alloy nanoparticles uniformly embedded in the carbon matrix (RuNi 1 Co 1 @CMT) are prepared through a simple impregnation followed by reduction. Benefiting from the unique mosaic structure and the synergistic effect between Ru and NiCo, RuNi 1 Co 1 @CMT achieves more exposed active sites and improved reaction kinetics. As a consequence, RuNi 1 Co 1 @CMT exhibits considerable catalytic activities with the overpotentials of 78 mV for HER and 299 mV for OER at 10 mA cm −2 in 1 M KOH. In addition, RuNi 1 Co 1 @CMT exhibits excellent stability for up to 30 h in both HER and OER processes at 20 mA cm −2 , which is attributed to the protection of the RuNi 1 Co 1 alloy particles by the carbon layer. Furthermore, the assembled RuNi 1 Co 1 @CMT || RuNi 1 Co 1 @CMT overall water splitting system shows a cell voltage of 1.58 V at 10 mA cm −2 . The density functional theory (DFT) calculations indicate that the addition of Ru can optimize the hydrogen adsorption free energy of Ni and Co sites. Finally, a solar panel-driven water splitting device is built, which can realize green and sustainable hydrogen production. The fabrication of RuNi 1 Co 1 @CMT provides a new way for the preparation of effective alloy nanomaterials for energy storage and conversion.
研究领域:
材料科学
·
催化化学
·
能源转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 18
·9049-9057
·
IF 11.301
Qifeng Yang,Peng Jin,Bing Liu,Liang Zhao,Jiahao Cai,Zhan Wei,Shouwei Zuo,Jing Zhang,Lai Feng
Encapsulating metallic nanoparticles (NPs) with a graphitic carbon shell is a promising strategy to achieve highly efficient and stable electrocatalysts for the hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and electrochemical overall water splitting (OWS). This work presents a simple and facile synthesis of graphitic carbon coated NixRuy alloys. The optimized catalyst (e-Ni0.6Ru0.4@C) displays an ultrafine morphology and outstanding HER and OER activities in alkaline media, which are among the best reported so far for various carbon-based electrocatalysts. Remarkably, the e-Ni0.6Ru0.4@C‖e-Ni0.6Ru0.4@C pair needs a low cell voltage of 1.51/1.62 V for driving OWS to reach 10/100 mA cm−2, far outperforming the benchmark electrode pair Pt/C‖RuO2. As expected, this carbon-based catalyst also exhibits superior durability as compared to that of precious catalysts. The experimental evidence combined with density functional theory (DFT) computations thus demonstrates for the first time that minor Ru alloying enables not only the morphological modulation but also the fine electronic modification of the catalyst, which both facilitate the overall electrochemical reactions on the carbon shell surface. Thus, our results may further shed light on how to design and optimize carbon-based electrocatalysts to achieve enhanced catalytic performance for OWS.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 3
·490
·
IF 3.4
Guangwan Zhang,Chunhua Han,Kang Han,Jinshuai Liu,Jinghui Chen,Haokai Wang,Lei Zhang,Xuanpeng Wang
Sodium-ion batteries (SIBs) are considered a potential replacement for lithium-ion batteries in the area of low-cost large-scale energy storage. Due to its low operating voltage, high capacity, non-toxicity and low production cost, titanium dioxide is now among the anode materials under investigation and shows the most promise. However, its poor electrical conductivity is one of the main reasons limiting its large-scale application. Herein, we designed a ruthenium-doped anatase-type VTi2.6O7.2ultrafine nanocrystal (Ru-VTO). As the anode of SIBs, Ru-VTO delivers a high specific capacity of 297 mAh g−1at 50 mA g−1, a long cycle life of 2000 cycles and a high rate capability (104 mAh g−1at 1000 mA g−1). The excellent performance may be related to the solid-solution interatomic interactions and the enhanced conductivity after ruthenium doping. These studies demonstrate the potential of Ru-VTO as an anode material for advanced SIBs.Keywords:titanium-based material;ru doping;high conductivity;anode;sodium-ion battery
研究领域:
材料科学
·
电化学
·
能量存储
✓ 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）