Journal of Energy Chemistry
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2025
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IF 14.9
Jian Li,Jinzhi Jia,Zhongwei Wang,Huijiao Wang,Junfeng Huang,Yantao Wang,Wenhan Dai,Peng-an Chen,Jinhua Zhang,Mudong Tu,Hua Li,Haiyan Ma,Cailing Xu
Electrochemical nitrate reduction reaction (NO 3 RR) is a sustainable strategy to treat wastewater and produce ammonia. However, it is still a challenge to prepare electrocatalysts with high activity and selectivity. Herein, the CuO x nanowires supported Ru nanoclusters (Ru-CuO x ) were fabricated via a three-step procedure for efficient nitrate conversion and highly selective ammonia generation. The prepared Ru-CuO x shows a high ammonia yield rate of 2286.5 μg h −1 cm −2 at −0.7 V vs. RHE and Faradaic efficiency (FE) of 80.1% at −0.4 V vs. RHE. Additionally, the nitrate conversion rate exceeds 90% at the potential range from −0.2 to −0.7 V vs. RHE, and the ammonia selectivity can reach 97.7% at −0.7 V vs. RHE in 100 mg L −1 NaNO 3 solution. The systematic characterizations clarify that the introduction of Ru not only regulates the electronic structure of CuO x and accelerates the reconstruction of CuO x to Cu but also promotes H 2 O dissociation to generate active hydrogen. Moreover, in-situ Raman spectroscopy reveals that the formed Ru-Cu is considered the actual active species during the NO 3 RR. Density functional theory (DFT) calculations further prove that the obtained Ru-Cu facilitates the adsorption of nitrate and lowers the Gibbs free energy of the rate-determining step, thus improving the NO 3 RR performance.
研究领域:
电催化
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环境化学
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纳米材料科学
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能源化学
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表面科学
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可持续化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
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IF 13
Qiaona Liu,Xin Han,An Qian,Jiayu Qian,Xin Pu,Lei Ye,Jinshan Zhan,Jian Zhang,Qiang Yang,Jichang Liu
Building heterojunctions and exposing more catalytic active sites are effective strategies to enhance the photocatalytic hydrogen evolution activity. Herein, TiO 2 nanosheets are oxidized in situ on Ru-loaded MXene as carriers and subsequently loaded with uniform 2D CdS via hydrothermal method to obtain 2D Ru/Ti 3 C 2 -TiO 2 /CdS composite photocatalysts that integrate heterojunctions and cocatalysts. The formation of heterojunction between CdS and TiO 2 is conducive to promoting the separation and transfer of photogenerated charges, simultaneously, Ru/Ti 3 C 2 with the fully exposed Ru and Ti 3 C 2 can act as effective active sites of photocatalytic hydrogen production reaction. The composite photocatalyst exhibits an improved hydrogen production rate with 5479 µmol g −1 h −1 , which is 5, 3, and four times more than that of pristine CdS, CdS loaded Ti 3 C 2 -TiO 2 and CdS loaded Ru-TiO 2 respectively. The results reveal that the notable enhancement in performance can primarily be ascribed to the introduction of the TiO 2 /CdS heterojunction and the efficient cocatalysts of Ru/Ti 3 C 2 . Moreover, the 2D Ti 3 C 2 with high conductivity as carriers can increase charge transfer, and its 2D structure can serve as a template for growing 2D photocatalysts with higher activity. The interface engineering with multiple interfaces can offer novel insights for the advancement of efficient hydrogen evolution reaction catalysts.
研究领域:
材料科学
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能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Jiabing Chen,Yibo Tang,Xingmao Jiang,Rui Zhang,Xiaojun Lu
In this work, Ru–CeO2 prepared by a “melting” method and used as a heterogeneous catalyst for ethylene methoxycarbonylation was investigated, together with two other catalysts prepared by impregnation and aerosol methods. The Ru–CeO2 (1%-M) catalyst demonstrates activity significantly higher than that of the other catalysts with the same Ru content. The XPS and Raman analysis results suggest that the Ru–CeO2 (1%-M) oxygen vacancy content is not the highest among the catalysts prepared using the three methods, even though the content oxygen vacancies have been reported to play a crucial role in carbonylation when using a Ru–CeO2 catalyst. It was discovered that the available Ru0 (Ru0 in the freshly prepared sample plus that being transformed from Run+ during reduction) is the other decisive factor in determining the catalyst’s performance. We further investigated the high reducibility of the catalyst prepared by using the melting method and discovered that a weak metal–support interaction could be obtained because of the independent formations of Ru and CeO2 crystals with graphite carbon as the barrier. Removing carbon under the optimal conditions could facilitate the as-formed Ru crystals anchored onto CeO2; therefore, there is no strong interaction between Ru and CeO2.
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Haiyang Wang,Caiyan Gao,Zhongyi Liu,Baojun Li,Young Dok Kim,Jie Feng,Kaihang Sun,Zhikun Peng
Active and durable electrocatalysts are essential for commercializing direct methanol fuel cells. However, Pt-based catalysts, extensively utilized in the methanol oxidation reaction (MOR), are suffered from resource scarcity and CO poisoning, which degrade MOR activity severely. Herein, Pt 1 Ru x bimetallic catalysts were synthesized by confining Pt 1 Ru x alloys within the shells of mesoporous carbon hollow spheres (MCHS) via a vacuum-assisted impregnation method (Pt 1 Ru x @MCHS). The confinement effect induced by mesoporous carbon hollow spheres resulted in a robust structure of Pt 1 Ru 3 @MCHS with an ultrafine dispersion of alloy nanoparticles. The experimental and theoretical results confirmed that the boosting electrocatalytic activity and stability of the MOR over Pt 1 Ru 3 @MCHS were contributed to the regulated electronic structure as well as the superior CO tolerance of atomic Pt site caused by the electronic interaction between single Pt atoms and Ru nanoparticles. This strategy is versatile for the rational design of Pt-based bimetallic catalysts and has a positive impact on MOR performance.
研究领域:
材料科学
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电化学
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纳米技术
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能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2020
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IF 2.726
Haodong Tang,Yao Wang,Wujian Zhang,Zongjian Liu,Lichun Li,Wenfeng Han,Ying Li
SmCeO x composite oxide with Sm 3+ occupying Ce 4+ site in CeO 2 crystal lattice , prepared via citric acid complexation method, was loaded with 2 w% Ru by impregnation method and the as-prepared catalyst was then evaluated for ammonia decomposition. The results show that the partial substitution of Ce 4+ by Sm 3+ produces a positive effect on the catalyst performance and SmCeO x supported Ru exhibits a much higher low-temperature catalytic activity for ammonia decomposition compared with other supports such as Sm 2 O 3 , CeO 2 , and a physical mixture of Sm 2 O 3 and CeO 2 . For example, the ammonia conversion is increased from 54.6% to 74.9% at a temperature of 400 °C and a space velocity of 3900 ml/g cat ·h when CeO 2 is replaced by Sm 0.4 Ce 0.6 O 1.8 . TEM and CO chemisorption investigations reveal that the excellent performance of Ru/SmCeO x catalyst is related to its high Ru dispersion. The results of BET, EPR and H 2 -TPR suggest that the partial substitution of Ce 4+ with Sm 3+ may induce the formation of oxygen vacancies and the high Ru dispersion can be attributed to the presence of large amount of single-electron trapped oxygen vacancies on the surface of SmCeO x , which have a strong interaction with Ru and thus Ru preferentially occupies the oxygen vacancies. This experimental observation is also supported by the DFT calculation result that Ru species adsorbed on the oxygen vacancy has a low adsorption energy .
研究领域:
催化
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化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
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2020
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IF 16.602
Ge Meng,Han Tian,Lingxin Peng,Zhonghua Ma,Yafeng Chen,Chang Chen,Ziwei Chang,Xiangzhi Cui,Jianlin Shi
Developing high-efficiency hydrogen evolution reaction (HER) catalysts is of great interest for the large-scale high-purity hydrogen production , which, unfortunately, is largely blocked by the sluggish kinetics of the electro-chemical dissociation step of water molecules. Herein, a MOF-derived method has been developed to prepare Ru nanoparticles-anchored sponge-like WNO embedded in N-doped carbon layers (Ru@WNO-C). The fabricated catalyst Ru@WNO-C (Ru: 0.9 wt%) shows excellent HER catalytic activity and long-term stability with the overpotentials of 172, 358 and 24 mV at 10 mA/cm 2 in 0.5 M H 2 SO 4 , 1 M Na 2 SO 4 and 1 M KOH, respectively. More impressively, the overpotentials, especially in neutral medium, decrease markedly during the durability tests owing to the catalyst structure activation after residual Zn species leaching. The enhanced catalytic activity of Ru@WNO-C during operation is mainly attributed to the in-situ electron donation from Ru to W, leading to the easier cleavage of highly polarized H‒OH bond of water molecules and thus endowing Ru@WNO-C with excellent HER catalytic performance in non-acidic solution.
研究领域:
材料科学
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电化学
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能源转换
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2019
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IF 2.938
Chenglong Dong,Hongtao Wang,Haochen Du,Jiebang Peng,Yang Cai,Shuai Guo,Jianli Zhang,Chanatip Samart,Mingyue Ding
Furfurylamine converted from biomass-based platform molecules furfural was proven a significant intermediate in the synthesis of different valuable compounds. The combination of Ruthenium with HZSM-5 was acted as an excellent selective and reusable catalyst for the reduction amination of furfural with environmentally friendly ammonia and hydrogen. Incorporation of Ru species into HZSM-5 had a significant enhancement to the acid sites of Ru/HZSM-5. The Ru/HZSM-5(46) catalyst with optimized acid sites and interaction of the Ru-O-Al bond displayed an excellent catalytic performance, producing 76 % yield of furfurylamine at only 15 min, and could be recycled five times without loss of performance. Synergistic effect between RuO 2 and metallic Ru in the Ru/HZSM-5 catalyst facilitated the reduction amination of furfural.
研究领域:
催化
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化学工程
·
可持续化学
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绿色化学
✓ 已验证
产品关联
DOI
高影响因子
Reaction Chemistry & Engineering
·
2024
·
IF 3.4
Rui Song,Chang Yao,Wenhua Li,Nihong An,Yafeng Shen,Nina Fei,Xiaohu Ge,Yueqiang Cao,Xuezhi Duan,Xing-Gui Zhou
Hydrogenations achieved on supported metal catalysts are normally structure sensitive, and comprehensive understandings on such sensitivity are pivotal for gaining insights into the active sites as well as the design of catalysts. Herein, a serials of differently sized Ru nanoparticles supported on carbon nanotube (CNT) were prepared and employed as catalysts for L-alanine hydrogenation to examine the structure sensitivity of amino acid hydrogenation. The reaction rates for L-alanine conversion and the formation of alaninol are demonstrated to be strongly dependent on the sizes of Ru nanoparticles, highlighting the structure sensitivity of the L-alanine hydrogenation. The activation energies extracted from kinetics studies are insensitive to the sizes of Ru nanoparticles on the Ru catalysts sized ≥1.3 nm with similar electronic properties, pointing to a predominant type of active site for L-alanine hydrogenation. By further combining model calculations with the shape of Ru nanoparticles determined by transmission electron microscopy, the Ru(101) sites are identified as the dominant active sites for L-alanine conversion and alaninol formation, which is further rationalized by density functional theory calculations. The kinetics insights into such structure sensitivity are believed to be important for the design and optimization of catalysts for the reaction.
研究领域:
催化
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物理化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2023
·
IF 9.5
Ting Zhu,Junnan Han,Teng Sun,Jiaming Chen,Sheng Wang,Siyun Ren,Xiaodong Pi,Jun Xu,Kunji Chen
Developing a bifunctional electrocatalyst with remarkable performance viable for overall water splitting is increasingly essential for industrial-scale renewable energy conversion. However, the current electrocatalyst still requires a large cell voltage to drive water splitting due to the unsuitable adsorption/desorption capacity of reaction intermediates, which seriously hinders the practical application of water splitting. Herein, a unique SiOx/Ru nanosheet (NS) material was proposed as a high-performance electrocatalyst for overall water splitting. The SiOx/Ru NSs show superior performance in the hydrogen evolution reaction with a low overpotential of 23 mV (@ 10 mA cm–2) and excellent stability for nearly 200 h (@ 10 mA cm–2) in 1 M KOH. By means of the introduction of SiOx, it is beneficial for balancing the local charge density of the surrounding Ru sites. The suitable electronic coupling between the d-band electrons of Ru and the adsorbed species effectively balances the adsorption and desorption of reaction intermediates on the surface. As a result, the catalyst also exhibits overall water splitting activity with a cell voltage of only 1.496 V to reach the current density of 10 mA cm–2. The present work opens up a new strategy for designing high-performance electrocatalysts for water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yi-Ran Du,Yi-Yu Tao,Jing-Wen Sun,Han-Sheng Li,Rui Zhang,Bao-Hua Xu
Despite great progress on the heterogeneous catalytic methoxycarbonylation of alkenes, the research on long-chain substrates is yet undeveloped. In this study, an efficient protocol was built by introducing 1-butyl-3-methylimidazole chloride (BmimCl) additive to the catalytic system of ceria-supported Ru clusters (Ru-CeO 2 ), providing the aliphatic esters with yields over 80 %. Experimental results combined mechanism studies demonstrated that the adsorption of chloride ion at oxygen vacancy (Vö) of CeO 2 during the catalysis delivered surfaces with reduced local concentration of Vö and electron-richer Ru sites. The synergistic effect between Vö and chloride ion boosted methanol (CH 3 OH) dissociation, providing higher coverage of dissociated CH 3 O species with lower adsorption energy and thereby accelerating the rate-limiting step of methoxycarbonylation. Importantly, the β-H elimination for competitive isomerization process was greatly inhibited on the electron-richer Ru sites. Meanwhile, the side hydrogenation was further suppressed by the restrained freedom of adsorbed H at such surfaces. These positive effects jointly offer a heterogeneous catalytic system of both efficient and selective on the challenging long-chain alkene substrates, taking methyl-4-pentenoate and chain alkenes with 6, 8, 10 and 12 carbon atoms as examples.
研究领域:
多相催化
·
有机合成
·
表面化学
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材料科学
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化学反应工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2019
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IF 6.97
Shizhen Liu,Yajun Wang,Shaobin Wang,Mingmu You,Song Hong,Tai-Sing Wu,Yun-Liang Soo,Zhenqing Zhao,Guiyuan Jiang,Jieshan Qiu,Baojun Wang,Zhenyu Sun
Photocatalysis shows a great potential for N2 fixation to NH3 under mild conditions, which intrigues increasing research attention in recent decades. To this end, the design of efficient photocatalysts is the key. Herein, we report the synthesis of single atom Ru decorated TiO2 nanosheets rich in oxygen vacancies. Single Ru sites greatly promoted photoreduction of aqueous N2 to NH3, affording an NH3 formation rate of 56.3 μg/h/gcat. We found that isolated Ru atoms likely weakened the hydrogen evolution, promoted absorption of N2, and also improved the charge carrier separation, which led to enhanced N2 photofixation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Ziyu Jia,Jun Hu,Ping Lu,Yahui Sun,Yunjun Wang
Herein, using Ru/C and H 2 WO 4 as the catalysts, native lignin in biomass was efficiently depolymerized into monophenols following the lignin-first strategy at mild conditions. Upon the co-presence of Ru/C and H 2 WO 4 , birch lignin afforded monophenols in 40.4 wt% yield at 200 °C, which was 2.5 times that upon Ru/C and 7.5 times that upon H 2 WO 4 . 4-Propylsyringol and 4-propylguaiacol were two major products with a combined selectivity of 73%. 2D HSQC NMR of liquid product reveals that β-O-4 bonds in the soluble lignin fragments had been thoroughly disrupted. H 2 WO 4 dissolving at high temperatures promoted the solvolysis of lignin from the biomass matrix, and Ru/C enhanced the following reductive depolymerization. The solid catalysts can be readily recovered for reuse at room temperature after the hydrolysis of carbohydrates, and the catalysts exhibited high activity after four recycles.
研究领域:
生物化学
·
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）