SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Chenghong Qiang,Nan Li,Shixiang Zuo,Zhimin Guo,Wei Zhan,Zhengping Li,Jiangquan Ma
Seeking active and low-cost cocatalysts is a vital task for solving the sluggish kinetics of photocatalysis process in environmental management. Herein, we report a novel and high-efficiency crystallized RuTe 2 cocatalyst, and loaded it onto black TiO 2 to form photocatalytic heterostructure (denoted as RuTe 2 /B-TiO 2 ) for diclofenac (DCF) degradation. To the best of our knowledge, the RuTe 2 as a cocatalyst for photocatalysis based on swift electron capture has not been documented yet. The degradation efficiency of DCF over 0.5% RuTe 2 /B-TiO 2 reached 95.2% for 120 min, which is 1.2 times higher than that of pure B-TiO 2 . In addition, the effects of different calcination temperatures, catalyst amounts, DCF concentrations and solution pH of the as-prepared catalysts were also investigated in depth. Spectroscopy/electrochemistry showed that 0.5% RuTe 2 /B-TiO 2 exhibited a narrower band gap, more active sites and better electrical conductivity than pure B-TiO 2 . Experiments with trapping agents have shown that O 2 – was the main active substance under irradiation. Furthermore, intermediates for the photodegradation of DCF were detected by liquid chromatography mass system (LC-MS) and density functional theory (DFT) calculations. Finally, the degradation pathway was rationalized and a possible photocatalytic mechanism for 0.5% RuTe 2 /B-TiO 2 was proposed.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Yanbing Sun,Huimin He,Dezhou Zheng,Fuxin Wang,Fanyuan Meng,Wei Xu,Gang Huang,Jing Zhao,Daize Mo,Mark C. Wiliiams,Qi Feng
Recently, ruthenium telluride (RuTe 2 ) has received widespread attention as an effective HER catalyst. In this work, ultrafine and well-dispersed RuTe 2 nanoparticles anchored on nitrogen and boron co-doped graphene (RuTe 2 /BNG) was developed by freeze-drying and facile pyrolysis method, demonstrating a brilliant HER performance. The overpotential of RuTe 2 /BNG at the current density of 10 mA cm −2 is only 34 and 16 mV in 0.5 M H 2 SO 4 and 1.0 M KOH solution, respectively. More importantly, the RuTe 2 /BNG can also maintain significantly robust HER stability during long-term chronopotentiometry measurements. The outstanding HER activity of RuTe 2 /BNG should be ascribed to its properties with abundant defects, large specific surface area, high electronic conductivity and short mass transfer path. Our work offers a new path to fabricate efficient HER catalysts by homogeneously anchoring RuTe 2 on B, N co-doped graphene.
研究领域:
材料科学
·
催化
·
纳米技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Bo Tang,Xudong Yang,Zhenhui Kang,Ligang Feng
Bifunctional catalysis for water splitting is for the first time realized on Ru noble metal in the form of crystallized RuTe 2 nanoparticles on graphene. Super activity to the state-of-the-art Pt and RuO 2 is found for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) because of the high degree of crystallinity, uniform distribution of nanoparticles, and electronic effect in the catalyst system. It offers a low cell voltage of 1.57 V to drive 10 mA cm −2 , 100 mV lower than that of Pt/C-RuO 2 benchmark electrodes in an alkaline electrolyte, along with a pretty good chemical and structural stability in the strong corrosive environment. The theory calculation confirms the superior intermediates adsorption property because of the Ru/Te synergism, and Pt like/RuO 2 like character for water splitting reaction. It is a very promising catalyst in the alkaline electrolyzer due to the reliable catalytic ability and relatively low price (1/4 Pt).
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Hongye Yan,Yifeng Chen,Lei Jiao,Wenling Gu,Chengzhou Zhu
With great progress in the development of nanozymes, the effect of size, composition and structure on the catalytic activity of nanozymes have been studied extensively, while the effect of phase has rarely been reported. Herein, phase-engineered RuTe 2 nanorods are synthesized with different phase structures and peroxidase (POD)-like activities, which enables an in-depth understanding of their structure-activity relationship. Amorphous RuTe 2 (a-RuTe 2 ) nanorods exhibit superior POD-like activity, which is 3.77 times higher than that of their crystalline counterpart (c-RuTe 2 nanorods). The amorphous phase composed of a large amount of disordered atoms endows the a-RuTe 2 nanozyme with impressive performance. Significantly, given many POD-like nanozymes also show oxidase (OXD)-like activities, the interferences of O 2 limit their applications in colorimetric assay. The proposed a-RuTe 2 nanorods were found to possess negligible OXD-like activity. As a proof-of-concept, an enzyme-linked immunosorbent assay (ELISA) was constructed utilizing a-RuTe 2 nanorods as labels for the detection of prostate-specific antigen (PSA). This a-RuTe 2 nanorods-based ELISA possesses a low detection limit of 32.6 pg mL −1 , which is at least one order of magnitude lower than that of conventional ELISA based on natural horseradish peroxidase. This work provides new insights into the design of high-performance nanozymes based on phase engineering.
研究领域:
纳米材料
·
生物医学工程
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yang Qin,Xinyu Xie,Ning Sun,Yufeng Wu,Ruyue Wang,Haodong Zhong,Ming Lei,Kai Huang,Peng Du
Tellurization has emerged as a promising strategy for developing high-performance electrocatalysts for hydrogen production, yet achieving controlled modification over Ru-based systems remains challenging in precise modification of phase composition and electronic structures. Herein, a rapid annealing-driven tellurization strategy was demonstrated to construct hetero-structured Ru/RuTe 2 nanoparticles from commercial RuO 2 and Te powder. The resulting Ru/RuTe 2 catalyst exhibits exceptional electrochemical hydrogen evolution reaction (HER) activity with an overpotential of 29 mV at 10 mA cm −2 and remarkable stability after 10k cycles of ADT test and 30 h of chronoamperometry (CA) test. Within an alkaline water electrolysis (AWE) system, the electrodes exhibit an ultralow cell voltage of 1.62 V to achieve 0.5 A cm −2 with outstanding durability for 1000 h, demonstrating the mixed-valence Ru heterostructure optimizes interfacial charge transfer kinetics and intrinsic activity. This study paves a new pathway toward high-efficiency and durable Ru-based heterostructures for water electrolysis through controlled surface engineering.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）