APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Chuang Li,Haeseong Jang,Min Gyu Kim,Liqiang Hou,Xien Liu,Jaephil Cho
Designing highly efficient Pt-free electrocatalysts with low overpotential for the alkaline hydrogen evolution reaction (HER) remains a significant challenge. In this paper, we successfully construct Ru-incorporated oxygen-vacancy-enriched MoO 2 nanosheets (Ru/MoO 2−x ) for the HER through a “one stone two birds” strategy. This strategy can solve two urgent problems simultaneously, the intrinsic electrochemical activity of original MoO 2 is far from satisfactory and the H 2 O adsorption/dissociation abilities of Ru are weak. Specifically, the oxygen-vacancy-enriched MoO 3 serves as an excellent platform for anchoring and trapping Ru ions. In-depth analyses indicate that the incorporation of Ru nanoclusters induces transition from MoO 3 to MoO 2 , generates oxygen vacancies, and creates Ru-O-Mo sites. The synergistic effect of Ru nanoclusters , Ru-O-Mo sites and oxygen-vacancy-enriched MoO 2 will endow the obtained catalyst excellent electrocatalytic activity. In particular, the optimal Ru/MoO 2−x electrocatalyst delivered a low overpotential of 29 mV at 10 mA cm −2 in a basic electrolyte.
研究领域:
电化学
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材料科学
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催化
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能源材料
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DOI
高影响因子
ChemCatChem
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2021
·Vol. 13
·期 19
·4159-4163
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IF 5.686
Dongxia Jiao,Yehong Wang,Zhixin Zhang,Jian Zhang,Lijun Lei,Feng Wang
Graphical Synthetic methods : We designed a hydroxyapatite (HAP)-stabilized, positively charged Ru-based catalyst which can efficiently catalyze the formylation reaction of amines with CO for the synthesis of formamide. The combination of characterization results and control experiments showed that positively charged Ru species, particularly the hydrated RuO x particles on the surface were essential to the high catalytic activity of Ru-HAP in the formylation reaction. Formamide is an important solvent and synthetic intermediate. Herein, we designed a hydroxyapatite (HAP)-stabilized, positively charged Ru-based catalysts which can efficiently catalyze the formylation reaction of amines with CO for the synthesis of formamide. The Ru-HAP showed excellent catalytic performance in N,N-Dimethylformamide (DMF) synthesis, with about 75 % dimethylamine conversion and >99 % DMF selectivity at 300 h of continuous reaction. The combination of characterization results and control experiments showed that positively charged Ru species, including hydrated RuO x and Ru 3+ species, were catalytically active. In particular, the surface RuO x species were more active than the Ru 3+ species located within the HAP framework.
研究领域:
催化
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材料科学
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化学工程
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无机化学
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DOI
高影响因子
ChemSusChem
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2011
·Vol. 4
·期 11
·1578-1581
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IF 6.325
Yao-Bing Huang,Jian-Jun Dai,Xiao-Jian Deng,Yan-Chao Qu,Qing-Xiang Guo,Yao Fu
Graphical Combo deal: An aqueous solution of levulinic acid (LA) and formic acid (FA) derived from biomass-based carbohydrates can be converted efficiently to pyrrolidines via a ruthenium catalyst without need for an energy-intensive separation of LA or an external H 2 source. The ruthenium catalyst combines two processes: decomposition of FA to H 2 and reductive amination of LA with an amine.
研究领域:
化学工程
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催化
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绿色化学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Jin-Jian Pan,Jia Huang,Yuan-Hang Qin,Zhen Chen,Li Yang,Cun-Wen Wang,Xingmao Jiang
Ba-based perovskite oxides rich in oxygen vacancies (OVs) are anticipated to possess robust electron-donating capabilities and other favourable properties, rendering them a promising support for Ru catalysts in NH 3 synthesis. Herein, a glucose-urea deep eutectic solvent calcinating method was developed to synthesize an OV-rich BaTiO 3 (BTO-H) support for Ru catalysts. The BTO-H-supported Ru (Ru/BTO-H) catalyst achieves an impressive NH 3 synthesis rate of 5133 μmol g cat –1 h −1 (256.7 mmol g R u –1 h −1 ) at 400 °C and 0.1 MPa, surpassing the performance of Ru catalysts supported on OV-poor BTO supports and other supported Ru catalysts. Physical characterizations and kinetic experiments reveal the multifaceted influence of OVs on enhancing the catalytic performance of Ru/BTO-H in NH 3 synthesis. OVs serve as electron donors to Ru catalyst, facilitating the activation and dissociation of N 2 . Simultaneously, OVs act as hydrogen acceptors from the Ru surface, mitigating hydrogen poisoning effects. Additionally, OVs stimulate the formation of surface hydrides, not only providing active sites for N 2 activation but also bestowing an electron-donating effect on the supported Ru catalyst. The combined positive effects of OVs establish BTO-H as an outstanding support for Ru catalysts in NH 3 synthesis.
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
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2020
·
IF 10.652
Shen Zhang,Yuan Rui,Xing Zhang,Rongjia Sa,Feng Zhou,Ruihu Wang,Xiaoju Li
The exploration of the inexpensive and efficient substitutes for platinum-based electrocatalysts is of great challenges for hydrogen evolution reaction (HER). Here, we presented a facile method to achieve highly active, cost-effective and stable HER catalysts, which are composed of ultrafine Co-Ru alloy nanoparticles embedded in heteroatom-free graphitic carbon (Co 1-x Ru x /GC). The optimum catalyst with ruthenium content of 0.93 wt% exhibits remarkable HER activity and the excellent durability, low overpotentials of 14, 39 and 44 mV at −10 mA cm −2 are achieved in alkaline, neutral and acidic media, respectively, which can compete with those in commercial 20 wt% Pt/C and majority of the reported platinum-free catalysts. It has been validated that the confinement effect of SBA-15 induces the formation of ultrafine alloy nanoparticles for generating more active sites. The theoretical simulations reveal that Co-Ru alloy regulates hydrogen adsorption energy to the optimum level, thus resulting in high HER activity. This work provides new methods for the fabrication of ultrafine alloy nanoparticles for the electrocatalysis and other application.
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
JOURNAL OF CATALYSIS
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2023
·
IF 7.3
Da Yang,Cong-Kun Zhong,Lu-Yao Tian,Long-Li Zhang,Huan Liu
Formic acid (FA) is a potential hydrogen storage substance due to its abundant resources, ease of storage, and high hydrogen content. In this paper, the hydroaminomethylation of olefins with FA as the hydrogen source was accomplished over DPEPhos-based Ru catalyst for the first time. Under optimal conditions, α-olefins or cycloolefins with steric hindrance obtained 62%∼96% yields of the target amines. The influence of FA was investigated by in situ high-pressure 1 H NMR spectroscopy analyses, isotope labelling experiments, and the separated hydroformylation or reduction amination. It was indicated that FA was decomposed to provide H 2 for the hydroformylation, and was used as a reducing agent in the transfer hydrogenation of imines/enamines. The reversible amidation of FA with substrate amine could inhibit the side reaction of aldehydes transfer hydrogenation. Moreover, the involving FA would facilitate the formation of Ru-H species, thereby promoting the hydroaminomethylation.
研究领域:
化学
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催化科学
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DOI
高影响因子
Catalysts
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2019
·Vol. 10
·期 1
·10
·
IF 3.444
Wan-Qiang Wang,Hua Cheng,Ye Yuan,Yu-Qing He,Hua-Jing Wang,Zhi-Qin Wang,Wei Sang,Cheng Chen,Francis Verpoort
The transition-metal-catalyzed alcohol dehydrogenation to carboxylic acids has been identified as an atom-economical and attractive process. Among various catalytic systems, Ru-based systems have been the most accessed and investigated ones. With our growing interest in the discovery of new Ru catalysts comprisingN-heterocyclic carbene (NHC) ligands for the dehydrogenative reactions of alcohols, we designed and prepared five NHC/Ru complexes ([Ru]-1–[Ru]-5) bearing different ancillary NHC ligands. Moreover, the effects of ancillary and additional ligands on the alcohol dehydrogenation with KOH were thoroughly explored, followed by the screening of other parameters. Accordingly, a highly active catalytic system, which is composed of[Ru]-5combined with an additional NHC precursorL5, was discovered, affording a variety of acid products in a highly efficient manner. Gratifyingly, an extremely low Ru loading (125 ppm) and the maximum TOF value until now (4800) were obtained.Keywords:ruthenium (Ru);N-heterocyclic carbenes (NHCs);carboxylic acids;ancillary ligands;additional ligands
研究领域:
化学
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催化反应
✓ 已验证
DOI
高影响因子
CATALYSIS COMMUNICATIONS
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2014
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IF 3.32
Qian Han,Xingquan Xiong,Sizhong Li
An efficient, green and scale-up synthesis of amides from esters and amines has been developed using Ru-MACHO as a readily available catalyst. A diverse range of amides were obtained in moderate to excellent yields (55–98%). Furthermore, when the scale of the amidation reaction was increased to 240.0 mmol, the desired amide still could be obtained in high yield (48.2 g of N -benzylbenzamide, 95%).
研究领域:
有机化学
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催化化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Yirui Jiang,Jianfang Liu,Hongru Liu,Yong Wang,Yongzhi Zhao,Sijia Liu,Yunpu Qin,Zihao Li,Hong Zhao,Hao Li,Haoyang Wu,Deyin Zhang,Luan Liu,Baorui Jia,Xuanhui Qu,Mingli Qin
Platinum (Pt) metal is widely acknowledged as a highly efficient electrocatalyst for hydrogen evolution reaction (HER) in acidic electrolyte. However, its performance in alkaline environments is significantly lower owing to the sluggish water dissociation step. Herein, we synthesized an ultrahigh Pt-mass-activity alkaline HER catalyst using microwave reduction method in air. Our catalyst, PtRu@CNT, comprises PtRu alloy nanoparticles uniformly loaded on carbon nanotubes, with Pt and Ru contents of 12.3 wt% and 4.5 wt%, respectively. The PtRu alloy nanoparticles have an average diameter of about 3 nm and a face-centered cubic structure, and the introduction of Ru has led to a modified electronic structure in Pt. As a result, an impressively low HER overpotential of 13 mV was achieved, significantly lower than commercial 20 wt% Pt/C (61 mV). PtRu@CNT exhibited a high turnover frequency based on metal mass of 3.06 s −1 at 100 mV, about 6 times higher than commercial Pt/C (0.46 s −1 at 100 mV), highlighting its excellent intrinsic activity. The HER mechanism of PtRu@CNT is a Volmer-Tafel mechanism, where the rate-limiting step changed to the recombination of hydrogen atoms from initial water dissociation, attributed to the presence of Ru. The alkaline HER activity of PtRu@CNT ranks among the best of currently reported Pt-based catalysts.
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
FUEL
·
2025
·
IF 7.5
Yingxue Du,Qihao Wang,Xingchao Zang,Weiping Xiao,Yingxia Zong,Xuyun Guo,Zexing Wu,Lei Wang
The development of efficient and durable bifunctional electrocatalysts for overall water splitting remains a key challenge for sustainable hydrogen production. In this study, a novel strategy is proposed to synergistically design boron vacancies and integrate Ru species into NbB 2 (Ru/RuO 2 -NbB 2 -v) by calcination and immersion methods. NbB 2 with its intrinsic high conductivity facilitates to electron transport and improves the reaction kinetics of the catalyst. The strategic introduction of abundant B vacancy and Ru species can expose numerous active sites and lower the reaction energy barriers in the materials, thereby enhancing the reactivity of the catalysts. Impressively, Ru/RuO 2 -NbB 2 -v exhibited superior hydrogen evolution reaction (HER) activity in wide pH range. In addition, Ru/RuO 2 -NbB 2 -v also exhibits good oxygen evolution reaction (OER) performance in acidic and alkaline. A self-assembled electrolyzer driven by simulated solar energy enables the conversion of solar energy into hydrogen energy. The work pioneers a defect-engineering and noble-metal-decoration strategy to transform metal borides into versatile electrocatalysts, offering a scalable pathway for clean energy technologies.
研究领域:
材料科学
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能源技术
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CONTROLLED RELEASE
·
2025
·
IF 11.5
Xuan Li,Hanchen Zhang,Zheng Cao,Haihua Xiao,Chao Weng,Qingfeng Zheng
The clinical efficacy of platinum-based chemotherapeutics, such as cisplatin, has been compromised by the prevalent emergence of drug resistance. This has propelled the search for alternative metal-based anti-tumor agents. Herein, we introduce PolyRu, a novel amphiphilic polymer containing a ruthenium complex and thioketal bonds in its main chain, for lung cancer treatment. PolyRu can self-assemble into nanoparticles (NP@PolyRu) in aqueous solutions and degrade within the reactive oxygen species-rich tumor microenvironment. The ruthenium complex in PolyRu specifically targets mitochondria and induces cancer cell apoptosis. The efficacy of NP@PolyRu was validated in a patient-derived xenograft model of human lung cancer, where NP@PolyRu significantly suppressed tumor progression with favorable biocompatibility，and showed excellent anti-tumor immune effect. NP@PolyRu emerges as a promising candidate for addressing cancer drug resistance, signifying a substantial leap forward in the realm of metal polymer-based cancer therapeutics.
研究领域:
肿瘤学
·
药理学
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Jiali Chen,Chen Huang,Yuqing Zhang,Liya Zhou,Li Ma,Lihui Wang,Yanjun Jiang,Yunting Liu
The conversion of racemic alcohols to enantiopure alcohols and amines is of significant importance yet presents considerable challenges. Herein, we achieved this goal by developing continuous-flow chemoenzymatic systems. In chemical module, a ruthenium (II)-N-heterocyclic carbene (Ru-NHC) catalyst immobilized on dendritic organosilica nanoparticle (DON) was prepared, which exhibited high activity and selectivity in the dehydrogenative oxidation of racemic alcohols to ketones. In enzymatic module, a ketoreductase and an amine dehydrogenase were individually co-immobilized with a cofactor-regenerating enzyme (glucose dehydrogenase) on DON for the enantioselective conversion of ketones to chiral alcohols and amines, respectively. The integration of the two modules in continuous-flow systems enabled the efficient chemoenzymatic deracemization and asymmetric amination of racemic alcohols (9 examples) with the maximum space-time yields of 6.8 and 5.8 g L -1 h -1 , respectively, underscoring the practical utility of the continuous-flow chemoenzymatic systems.
研究领域:
生物化学
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有机化学
·
合成生物学
✓ 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）