Nanomaterials
·
2025
·Vol. 15
·期 17
·1356
·
IF 4.3
Jingchao Zhang,Yingping Bu,Jia Hao,Wenjun Zhang,Yao Xiao,Naihui Zhao,Renchun Zhang,Daojun Zhang
Among various H2production methods, splitting water using renewable electricity for H2production is regarded as a promising approach due to its high efficiency and zero carbon emissions. The oxygen evolution reaction (OER) is an important part of splitting water, but also the main bottleneck. The anodic oxygen evolution reaction (OER) for water electrolysis technology involves multi-electron/proton transfer and has sluggish reaction kinetics, which is the key obstacle to the overall efficiency of electrolyzing water. Therefore, it is necessary to develop highly efficient and cheap OER electrocatalysts to drive overall water splitting. Herein, a series of efficient RuO2-Co3O4composites were synthesized via a straightforward three-step process comprising solvothermal synthesis, ion exchange, and calcination. The results indicate that using 10 mg of RuCl3·xH2O and 15 mg of Co-MOF precursor in the second ion exchange step is the most effective way to acquire the Co3O4-RuO2-10 (RCO-10) composite with the largest specific area and the best electrocatalytic performance after the calcination process. The optimal Co3O4-RuO2-10 composite powder catalyst displays low overpotential (η10= 272 mV), a small Tafel slope (64.64 mV dec−1), and good electrochemical stability in alkaline electrolyte; the overall performance of Co3O4-RuO2-10 surpasses that of many related cobalt-based oxide catalysts. Furthermore, through integration with a carbon cloth substrate, Co3O4-RuO2-10/CC can be directly used as a self-supporting electrode with high stability. This work presents a straightforward method to design Co3O4-RuO2composite array catalysts for high-performance electrocatalytic OER performance.
研究领域:
电化学
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材料科学
·
催化
·
可再生能源
·
纳米材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 15
·9581-9585
·
IF 12.732
Yuemin Du,Yijie Liu,Sixie Yang,Chao Li,Zhu Cheng,Feilong Qiu,Ping He,Haoshen Zhou
The fossil fuel crisis and global warming are becoming more and more severe in this century, while the exploration of human survival on Mars is being pushed forward steadily. Hence, it is meaningful to effectively utilize CO2, the main greenhouse gas and a major component of the Martian atmosphere. Due to their high capacity and ability to capture CO2, Li–CO2 batteries have received much attention. However, there are problems that still need to be solved relating to Li–CO2 batteries, including the instability of the electrolyte and the non-negligible polarization caused by the formation and decomposition of Li2CO3. To address these issues, an all-solid-state Li–CO2 battery, which uses RuO2 nanoparticles combined with single-walled carbon nanotubes (SWCNTs) as the cathode material and a sodium super ionic conductor (NASICON)-type ceramic solid electrolyte, Li1.5Al0.5Ge1.5(PO4)3 (LAGP), has been developed and it operates over a broad temperature range. Under a pure CO2 atmosphere, this well-designed battery shows a discharge capacity of 2499 mA h g−1 and a charge capacity of 2137 mA h g−1 in the first cycle at 60 °C, and stable cycling performance over 30 cycles under a capacity limitation of 500 mA h g−1 at a current density of 50 mA g−1. This result enhances the possibility of the utilization of the Li–CO2 battery in the future.
研究领域:
材料科学
·
能源技术
·
催化化学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 9
·3579-3588
·
IF 8.307
Jianjun Zhou,Tian Wang,Cheng Cheng,Fan Pan,Yunqing Zhu,Hongrui Ma,Junfeng Niu
Electrocatalytic oxidation is regarded as an effective technique for decomposing refractory organic compounds like perfluorooctanoic acid (PFOA). However, achieving highly efficient and long-life electrodes is still a great challenge. Herein, Ti/RuO2–IrO2@Pt anodes consisting of Pt4+ and Pt0 species were fabricated by combining modified microemulsion technology with a calcination process, in which Pt nanoparticles were highly dispersed and encapsulated in Ru–Ir composite oxides to form a strong metal–support interaction (SMSI) structure. The as-constructed SMSI layer on the Ti/RuO2–IrO2@Pt anode resulted in the improvement of the charge transfer capability and also increased the degradation (99.30%) and mineralization (91.32%) of PFOA during the electrochemical oxidation process. Notably, the service lifetime of Ti/RuO2–IrO2@Pt anodes was remarkably improved from 24 to 42.3 h compared to commercial Ti/RuO2–IrO2 anodes. Moreover, the possible degradation mechanism of PFOA was also speculated through the detection of short-chain perfluorocarboxylic acids and reactive radicals. These results not only revealed that the concept and methodology of SMSI could be an effective way for constructing highly efficient and stable electrocatalysts but also greatly advanced fundamental understanding.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 45
·21285-21292
·
IF 3.591
Tianci Wang,Yu Song,Wanna Zhao,Chunmei Zhou,Yuguang Jin,Xiaoyue Wan,Yihu Dai,Yanhui Yang
The oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) is one of the most attractive reactions to establish a sustainable chemical process based on biomass resources. In this work, a CNT-supported ruthenium–manganese oxide nano-catalyst (RuO2/MnO2/CNT) was employed for the electro-catalytic oxidation of HMF in base-free aqueous solution. The activity test showed that α-MnO2 can effectively promote the activity of RuO2 in the oxidation of HMF. In comparison with RuO2/CNT, RuO2/MnO2/CNT possessed a lower activation energy and more than twice the FDCA formation rate. Under the optimized reaction conditions, the RuO2/MnO2/CNT catalyst afforded a FDCA yield of 72.1% in a 0.1 M K2SO4 aqueous solution at a 0.9 V (vs. Ag/AgCl) applied potential. To our knowledge, this is the first demonstration of FDCA formation as the primary product with high yield in an initially neutral electrolyte. The product FDCA can be easily separated after cooling the reaction solution to room temperature.
研究领域:
催化
·
化学工程
·
可持续化学
·
生物质转化
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yilin Wang,Xiaoli Sun,Yunmei Du,Shuangshuang Li,Mengmeng Wang,Yanru Liu,Lei Wang
Optimizing the electronic structure of Ru by introducing N dopants or O vacancies (V O ) into RuO 2 is expected to be a promising strategy to stimulate the hydrogen evolution reaction (HER) performance. However, it is a challenge to develop a fast and low-energy method to simultaneously achieve the construction of N dopants and V O . This work was the first to optimize the quenching technique for achieving the co-introduction of V O and N in Co-RuO 2 nanosheets (N,Co-RuO 2 -V O ). Related characterizations confirmed that V O and N dopants synergistically optimized the electronic configuration of Ru and the reaction path of alkaline HER. As expected, the mass activity of N,Co-RuO 2 -V O (2208.63 mA m g R u - 1 ) was 8.05-fold that of Pt/C at 100 mV for alkaline HER. Surprisingly, N,Co-RuO 2 -V O required only 148.6 mV to achieve an industrial-grade current density of 1 A cm −2 , which was much lower than the commercial Pt/C catalyst (312 mV). Overall, this work provides an energy-efficient new strategy for the development of Ru-based catalysts with ampere-level currents.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Xiezhen Zhou,Siqi Liu,Anlin Xu,Kajia Wei,Weiqing Han,Jiansheng Li,Xiuyun Sun,Jinyou Shen,Xiaodong Liu,Lianjun Wang
A novel electrochemical filter has been prepared for the effective adsorption and electrochemical oxidation of aqueous organic pollutants. The adsorptive electrode utilized in the electrochemical filter was a porous Graphite-RuO 2 electrode decorated with multi-walled carbon nanotubes (MWCNTs) adsorption layer, which was prepared by sol–gel coating, thermal decomposition, and vacuum filtration synthesis. The morphology and composition of adsorptive electrode characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) revealed a uniform distribution of RuO 2 active coating and MWCNTs adsorption layer. Electrochemical measurements indicated that the adsorptive electrode possessed a favorable oxygen evolution potential (OEP) of 1.42 V and inner voltammetric charge 170.05 mC·cm −2 , which were higher than that of non-MWCNTs electrode. Furthermore, the mass transfer of adsorptive electrode was enhanced as high as 4.6-fold in the electrochemical filter. The optimal operation parameters obtained was 3 mA·cm −2 and 7 g·L −1 Na 2 SO 4 . Under this condition, the electrochemical filter can remove > 97% of pyrrole and >75% of total organic carbon. The pyrrole oxidation mechanism of electrochemical filter was also investigated, revealed three dominant reaction stages: adsorption (≤0.3 V), direct oxidation (0.3–1.2 V) and indirect oxidation (>1.2 V). In general, the high electrochemical performance of Graphite-RuO 2 -MWCNTs filter on pyrrole removal resulted from the enhanced mass transfer, which attributed to the synergistic effect of adsorption from MWCNTs, electrochemical oxidation and convection by filtration.
研究领域:
环境科学
·
材料科学
·
电化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Da Yue,Zhicheng Zhu,Liyuan Chen,Haizhu Sun,Bai Yang
Developing high-performance hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) electrocatalysts to accelerate water splitting kinetics is essential for advancing electrolytic hydrogen production. Herein, a Ru-RuO 2 heterostructure catalyst with stabilized active interfaces is developed by utilizing carbonized polymer dots (CPDs) as electron-modulating mediators. Specifically, CPDs serve as electron reservoir that dynamically regulate the valence state of Ru through coupling with Ru sites during the reduction-oxidation process, driving the oriented formation of small-sized, high-density Ru-RuO 2 nano-heterojunction structure. Simultaneously, CPDs' nanoscale template effect synergistically induces abundant nanoporous structures with Ru-RuO 2 species. The dual modification of geometric and electronic properties not only achieves efficient charge separation but also optimizes bifunctional active sites and significantly improves mass transfer performance. The resultant Ru-RuO 2 /CPDs catalyst successfully integrates the advantages of HER and OER active components, achieving highly efficient and stable bifunctional catalytic activity. In overall water splitting devices, the Ru-RuO 2 /CPDs catalyst exhibits cell voltages of merely 1.51 V in H 2 SO 4 and 1.44 V in 1.0 M KOH to achieve 10 mA cm −2 , with both systems demonstrating stability exceeding 220 h. This work provides a facile strategy for designing efficient and stable catalysts for water splitting across a broad pH range.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2018
·
IF 4.244
Jiantong Qiao,Yulong Zhang,Sheng Lei,Zi Liu,Gaiping Li,Baoxian Ye
The nanocomposite of ruthenium oxide (RuO 2 ) loaded on Poly-(dimethyldiallylammonium chloride) (PDDA) functionalized reduced graphene oxide (RuO 2 -PDDA-rGO) was synthesized based on a one-step method. Based on the RuO 2 -PDDA-rGO modified glassy carbon electrode (GCE), a new electrochemical sensor (RuO 2 -PDDA-rGO/GCE) was fabricated and used in detection of baicalein for the first time. Compared with other reported electrochemical sensors for the detection of baicalein, the prepared RuO 2 -PDDA-rGO/GCE had a wider linear range (2–400 nM) and lower detection limit (0.6 nM, S/N = 3). The other advantages were the excellent repeatability of proposed method and good stability of prepared sensor.
研究领域:
分析化学
·
纳米技术
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Research
·
2024
·Vol. 17
·期 6
·4764-4772
·
IF 9.5
Duan Yuhao,Wei Liuxu,Cai Chenyu,Mi Junbao,Cao Fuyuan,Chen Jiaze,Li Xiaolong,Pang Xiujiang,Li Bin,Wang Lei
The chlorine evolution reaction (CER) is a crucial step in the production of chlorine gas and active chlorine by chlor-alkali electrolysis. Currently, the endeavor to fabricate electrodes capable of yielding high current density at minimal overpotential remains a central challenge in advancing the realm of chlorine evolution reactions. Here, we grow TiO 2 and RuO 2 on MXene@carbon cloth (CC) through the favorable affinity and induced deposition effect between the surface functional groups of MXene and the metal. A self-supported electrode (RuTiO 2 /MXene@CC) with strong binding at the electrocatalyst–support interface and weak adhesion at electrocatalyst–bubble interface is constructed. The RuTiO 2 /MXene@CC can reduce the electron density of RuO 2 by regulating the electron redistribution at the heterogeneous interface, thus enhancing the adsorption of Cl − . RuTiO 2 /MXene@CC could achieve a high current density of 1000 mA·cm − 2 at a small overpotential of 220 mV, superior to commercial dimensionally stable anodes (DSA). This study provides a new strategy for constructing efficient CER catalysts at high current density.
研究领域:
电化学
·
催化
·
材料科学
·
纳米技术
·
化学工程
✓ 已验证
DOI
高影响因子
Nanoscale
·
2015
·Vol. 7
·期 28
·11962-11970
·
IF 7.394
Zhiyin Xiao,Xiaohong Jiang,Bo Li,Xijian Liu,Xiaojuan Huang,Yuxin Zhang,Qilong Ren,Jie Luo,Zongyi Qin,Junqing Hu
Metal oxides are receiving an incremental attention in recent years for their potential applications in ablation of cancer cells due to their efficient photothermal conversion and good biocompatibility, but the large sizes and poor photo-stability will seriously limit their practical application. Herein, hydrous RuO2 nanoparticles were synthesized by a facile hydrothermal treatment and surface-modified with polyvinylpyrrolidone (PVP) coating. PVP-coated RuO2 nanoparticles exhibit a well dispertion in saline solution, strong characteristic plasmonic absorption in NIR region, enhanced photothermal conversion efficiency of 54.8% and remarkable photo-stability under the irridation of an 808 nm laser. The nanoparticles were further employed as a new photothermal ablation agent for cancer cells which led rapidly to cellular deaths both in vitro and in vivo.
研究领域:
材料科学与工程
·
肿瘤学
·
纳米医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of the American Chemical Society
·
2025
·
IF 15.6
Jing Liang,Yuanyuan Zhao,Chenyu Yang,Shandong Zhu,Liang Wang,Ke Xu,Xueliang Mu,Yong Han,Zhi Liu,Zhiwei Zhao,Wei Liu,Fei Li,Zhangquan Peng,Edmund C. M. Tse,Qinghua Liu,Junfeng Gao,Qing Li,Jianfeng Li,Jinxuan Liu
Developing efficient, cost-effective, and durable electrocatalysts for proton exchange membrane water electrolysis (PEMWE) remains a significant challenge, requiring the stabilization and enhancement of catalyst activity under harsh conditions. Here, we present cobalt-doped ruthenium dioxide (Co0.3Ru0.7O2) on TiO2 as an electrocatalyst toward an acidic oxygen evolution reaction. The Co0.3Ru0.7O2–TiO2 achieves an impressive overpotential of 322 mV at 1 A cm–2 and demonstrates stable operation for over 1000 h at 500 mA cm–2 in a PEMWE device. Comprehensive experimental and theoretical calculation results demonstrate that the doping of Co atoms into the rutile RuO2 lattice optimizes the geometric configuration. Moreover, the lattice-matched interface between Co0.3Ru0.7O2 and TiO2 promotes interfacial electron redistribution and stabilizes active centers under oxidative conditions. This facilitates a dual-site fully parallel oxidation (DFO) pathway in which intermediates are synchronously adsorbed and desorbed at Ru and Co sites, enabling direct O–O coupling. This work highlights the synergistic effect of the Ru–Co dual sites and TiO2 support in establishing a stable, self-regulating electronic environment that drives efficient intermediate transformation via the DFO mechanism.
研究领域:
电催化化学
·
材料科学
·
能源化学
·
纳米材料
·
表面科学
·
电化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Lijuan Shi,Xueyan Wu,Kenan Zhao,Xinyu Guo,Xiuli Zhang,Yan Lv,Jixi Guo
Developing low-cost catalysts with high activity for the Hydrogen Evolution Reaction (HER) is a main challenge to reduce the dependence on precious metals while maintaining the catalytic activity. In this study, nickel-plated multi-walled carbon nanotubes (Ni-MWCNTs) with a large number of active sites were selected, and Ni-MWCNTs electrocatalysts loaded with trace amounts of RuO 2 nanoparticles were prepared by annealing treatment, which exhibited excellent HER performances in both acidic and alkaline media. The RuO 2 nanoparticles loaded nickel-coated multi-walled carbon nanotubes (RuO 2 @Ni-MWCNTs) had a small electrochemical impedance spectrum (EIS) and a large electrochemically active surface area (ECSA). Notably, RuO 2 @Ni-MWCNTs with less than 1 % Ru content exhibited excellent catalytic activities in both acidic and alkaline solutions. The results showed that the overpotentials of RuO 2 @Ni-MWCNTs were 20.2 mV (alkaline) and 73.7 mV (acidic), respectively. After stabilization at 20 mA cm −2 for 90 h, the evaluation results showed that RuO 2 @Ni-MWCNTs could maintain their catalytic efficiency without significant degradation.
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
危险品化学品经营许可证（带存储）