JOURNAL OF CATALYSIS
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2022
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IF 8.047
Lele Huang,Xu-Feng Liu,Jinglin Zou,Xinping Duan,Zuo-Chang Chen,Zhe-Hui Zhou,Linmin Ye,Xuelian Liang,Su-Yuan Xie,Youzhu Yuan
Constructing and taming metal–support interaction of atoms and/or clusters has emerged as a promising protocol to maximize the catalytic performance of noble metal-based materials. Here, we report atomic ruthenium (Ru) with the oxidized state immobilized on defect-rich hexagonal boron nitride ( d -BN) nanosheets and the essential interfacial electronic effect on Ru deduced from B- and N-vacancies for superior selective hydrogenation of esters. Experimental results indicate that strong electronic interplay exists between vacancies and atomic Ru species. Unlike defect-free commercial hexagonal BN ( h -BN), d -BN can highly stabilize the active Ru species in atomic scale with oxidation state, and the obtained Ru/ d -BN significantly increases the catalytic activity and durability. Specifically, the turnover frequency of Ru/ d -BN is more than one order of magnitude higher than that of the conventional optimized Ag/SiO 2 catalyst for the selective hydrogenation of dimethyl oxalate to methyl glycol. Systematic characterizations show that the Ru on B- and N-vacancies, and the defective BN serves as electron acceptor. The findings demonstrate the overall electronic effect on the electron-rich feature of Ru on d -BN, such that the electronic metal–support interactions cause the Ru species to favor the adsorption and selective scission of C–O bonds in esters, revealing a highly efficient hydrogenation catalysis.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
ENERGY & FUELS
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2023
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IF 5.3
Peng Xu,Hongrui Wang,Siqi Guo,Zuoming He,Gengcheng Liao,Ningyan Cheng,Yundan Liu,Bin-Wei Zhang
The development of affordable and efficient catalysts for seawater hydrogen evolution is highly desirable but presents significant challenges. In this study, we prepared an exceptionally efficient electrocatalyst, atomic Ru-doped Ni0.85Se supported on carbon cloth (Ru–Ni0.85Se/CC–12 h), for the hydrogen evolution reaction (HER) in both a 1 M KOH solution and an alkaline-simulated seawater environment (1 M KOH and 0.5 M NaCl). Notably, Ru–Ni0.85Se/CC–12 h exhibited excellent performance with remarkably low overpotentials of 34.1 and 44.2 mV at 10 mA/cm2 in the 1 M KOH solution and the alkaline-simulated seawater environment, respectively. Furthermore, it demonstrated remarkable durability, showing negligible performance degradation even after continuous 18 h at 10 mA/cm2. The outstanding HER performance of Ru–Ni0.85Se/CC–12 h in both alkaline solution and alkaline-simulated seawater can be attributed to the atomic Ru doping in Ni0.85Se, which modifies its geometric and electronic structure, thereby enhancing its activity and resistance to chloride ion poisoning and erosion simultaneously.
研究领域:
材料科学
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电化学
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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
Xuecheng Cao,Minghui Cui,Kaiqi Fang,Liting Yan,Hongyu Gong,Yu Zhang,Xiangjun Zheng,Ruizhi Yang
Rechargeable non-aqueous lithium-oxygen batteries (LOBs) have garnered increasing attention owing to their high theoretical energy density. However, their slow cathodic kinetics hinder efficient battery reactions. Nanoscale catalysts can effectively enhance electrocatalytic activity and atomic utilization efficiency. However, the agglomeration of nanoscale catalysts (such as cluster and single atoms) during continuous discharge/charge cycles leads to decreased electrochemical performance and poor cyclic stability. Herein, the ruthenium (Ru) atomic sites anchored on an O-doped molybdenum disulfide (O-MoS 2 ) catalyst (designated as Ru/O-MoS 2 ) was fabricated using a facile impregnation and calcination method. Strong Ru-O coupling between Ru atoms and the O-MoS 2 substrate optimizes the localized electronic structure, resulting in improved electrochemical performance and enhanced resistance to Ostwald ripening. When employed as a cathode catalyst for LOBs, Ru/O-MoS 2 catalyst exhibits a high reversible specific capacity (18700.5 (±59.8) mAh g −1 ), good rate capability, and enhanced long-term stability (115 cycles, 1200 h). This study encourages facile and efficient strategies for the development of effective and stable electrocatalysts for use in LOBs.
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Wen Zhang,Guang-Rui Xu,Tiantian Sun,Jiayi Li,Yu Miao,Zexing Wu,Yang Zhang,Lei Wang
Intermetallic compounds (IMCs) with long-range atomic-scale ordering are an emerging class of efficient and stable electrocatalytic alloy materials. Compared with disordered alloys, IMCs show a better electronic structure and higher mixing enthalpy. Herein, the ordered Ru 4 Fe intermetallic compounds with a diameter of 15 nm on porous carbon (Ru 4 Fe IMCs/C) are synthesized by a sol–gel and annealing steps, the interaction of Ru 4d and Fe 3d orbitals produces an anisotropic electron distribution, which facilitates the adsorption of water molecules and accelerates their dissociation, which exhibit excellent hydrogen evolution at all pH values. At the current density of 10 mA cm −2 , the overpotentials of Ru 4 Fe IMCs/C are 29, 24, and 36 mV in acidic, neutral, and alkaline media for hydrogen evolution reaction (HER), respectively, superior to that of Pt/C catalysts with a mass loading of 20%. Mechanistic studies suggest that the adsorption Gibbs free energy of *H (ΔG *H ) on Ru 4 Fe IMCs/C is closer to 0 eV compared to Ru NPs/C, which facilitates the HER process.
研究领域:
材料科学
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电催化
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
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2023
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IF 5.5
Yunye Wang,Mengdie Guo,Ya Wang,Xinjie Liu,Xiaopeng Li,Cuong Pham-Huu,Xuemei Liao
Catalytic oxidation of biomass derived 5-Hydroxymethylfurfural (HMF) feedstock is a promising route to produce value-added chemicals 2, 5-diformylfuran (DFF). Here, we find that incorporating monatomic Ru into the crystalline lattice of α-MnO 2 can trigger synergetic catalysis for aerobic oxidation of HMF. Ru species can not only act as active sites for HMF conversion, but also activate surface oxygen species by creating rich oxygen vacancies on the α-MnO 2 . As result, such catalyst delivers much higher DFF productivity than that of Ru located in the tunnel of support (110 °C, 1.5 MPa, 1 h) and state-of-the-art Ru-based catalysts. Furthermore, the direct conversion of fructose into DFF was realized by combination of Amberlyst-15 and Ru-MnO 2 HT catalyst in one-pot via two-step. Characterization and kinetic results indicated that atomically dispersed Ru hosted in the crystalline lattice of support created abundant oxygen vacancies and thus weakened the Mn-O bond, resulting in facile lattice oxygen activation.
研究领域:
化学
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催化材料科学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2025
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IF 9.5
Xueyan Que,Zeyu Zhang,Yicheng Wang,Junqing Bai,Jing Peng,Jiuqiang Li,Yue Wang,Maolin Zhai
Water electrolysis with limited hydrogen yield is the main method for producing green hydrogen, which shows enhancement when coupled with solar energy. MXenes are one of the promising materials with an intensity localized surface plasmon resonance (LSPR) effect for the utilization of infrared and visible wavelengths of the solar spectrum. In this work, Ru atom clusters were anchored on Ti3C2Tx MXene nanosheets through gamma-ray radiation using hydrated electrons (eaq−) as the reducing agent and Ti3C2Tx itself as the oxidizing free radical scavenger to form Ru/Ti3C2Tx catalysts. The as-synthesized catalysts perform enhanced activity in the hydrogen evolution reaction (HER) across all pH ranges under 808 nm near infrared (NIR) light illumination because of the plasmonic effect of Ti3C2Tx nanosheets. Ru/Ti3C2Tx with only 2.40 wt% Ru exhibits the highest HER activity under NIR light illumination with a Tafel slope of 141 mV dec−1 and a current density enhancement of 3.56 mA cm−2 at an overpotential of 200 mV. This work demonstrates the effectiveness of gamma-ray radiation for synthesizing atomically dispersed electrocatalysts with enhanced HER performance when coupled with the illumination of infrared light.
研究领域:
材料化学
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电催化
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纳米材料
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能源科学
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物理化学
✓ 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）