Search

Your search keyword '"Qian, Jinjie"' showing total 542 results
Start Over Author "Qian, Jinjie"
542 results on '"Qian, Jinjie"'

23. In-based coordination polymer-derived carbon nanoribbons with abundant CoP nanoparticles in carbon nanotubes for water oxidation.

Author

Wang, Xiaofang, Guo, Yuanyuan, Shen, Yanqiong, and Qian, Jinjie

Subjects
COORDINATION polymers, CARBON nanotubes, OXIDATION of water, NANORIBBONS, OXYGEN evolution reactions, POROUS polymers, NANOPARTICLES
Abstract

The sluggish oxygen evolution reaction (OER) in overall electrocatalytic water splitting poses a significant challenge in hydrogen production. A series of transition metal phosphides are emerging as promising electrocatalysts, effectively modulating the charge distribution of surrounding atoms for OER. In this study, a highly efficient OER electrocatalyst (CoP-CNR-CNT) was successfully synthesized through the pyrolysis and phosphatization of a Co-doped In-based coordination polymer, specifically InOF-25. This process resulted in evenly dispersed CoP nanoparticles encapsulated in coordination polymer-derived carbon nanoribbons. The synthesized CoP-CNR-CNT demonstrated a competitive OER activity with a smaller overpotential (η10) of 295.7 mV at 10 mA cm-2 and a satisfactory long-term stability compared to the state-of-the-art RuO2 (η10 = 353.7 mV). The high OER activity and stability can be attributed to the high conductivity of the carbon network, the abundance of CoP particles, and the intricate nanostructure of nanoribbons/nanotubes. This work provides valuable insights into the rational design and facile preparation of efficient non-precious metal-based OER electrocatalysts from inorganic–organic coordination polymers, with potential applications in various energy conversion and storage systems. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

29. Tailoring the Compositions and Nanostructures of Trimetallic Prussian Blue Analog‐Derived Carbides for Water Oxidation.

Author

Mao, Lujiao, Liu, Jie, Lin, Rong, Xue, Jinhang, Yang, Yuandong, Xu, Shaojie, Li, Qipeng, and Qian, Jinjie

Subjects
PRUSSIAN blue, HYDROGEN production, CATALYTIC activity, CARBON nanotubes, OXIDATION of water
Abstract

The electrochemical splitting of water for hydrogen production faces a major challenge due to its anodic oxygen evolution reaction (OER), necessitating research on the rational design and facile synthesis of OER catalysts to enhance catalytic activity and stability. This study proposes a ligand‐induced MOF‐on‐MOF approach to fabricate various trimetallic MnFeCo‐based Prussian blue analog (PBA) nanostructures. The addition of [Fe(CN)6]3− transforms them from cuboids with protruding corners (MnFeCoPBA‐I) to core–shell configurations (MnFeCoPBA‐II), and finally to hollow structures (MnFeCoPBA‐III). After pyrolysis at 800 °C, they are converted into corresponding PBA‐derived carbon nanomaterials, featuring uniformly dispersed Mn2Co2C nanoparticles. A comparative analysis demonstrates that the Fe addition enhances catalytic activity, while Mn‐doped materials exhibit excellent stability. Specifically, the optimized MnFeCoNC‐I‐800 demonstrates outstanding OER performance in 1.0 m KOH solution, with an overpotential of 318 mV at 10 mA cm−2, maintaining stability for up to 150 h. Theoretical calculations elucidate synergistic interactions between Fe dopants and the Mn2Co2C matrix, reducing barriers for oxygen intermediates and improving intrinsic OER activity. These findings offer valuable insights into the structure‐morphology relationships of MOF precursors, advancing the development of highly active and stable MOF‐derived OER catalysts for practical applications. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

37. The N-anchoring effect in NH2-functionalized MOF-derived iron–carbon nanomaterials for oxygen reduction.

Author

Shen, Yanqiong, Mao, Lujiao, Lin, Rong, Li, Qipeng, and Qian, Jinjie

Subjects
OXYGEN reduction, IRON, NANOSTRUCTURED materials, GRAPHITIZATION, CATALYSTS
Abstract

The incorporation of an iron source into NH2-MOF-5, followed by thermal decomposition, yields a porous metal–carbon catalyst (MOF5A-Fe@NC). This catalyst possesses significant N content, a high degree of graphitization, and abundant Fe–Nx sites, which contribute to enhanced oxygen reduction. Specifically, the obtained MOF5A-Fe@NC demonstrates a positive onset potential (0.972 V), a substantial limiting current density (4.815 mA cm−2), and a small Tafel slope (58.7 mV dec−1), and maintains a high current retention of 96.3% after 10 hours. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

38. Highly thermostable RhB@ Zr-Eddc for the selective sensing of nitrofurazone and efficient white light emitting diode.

Author

Shen, Yanqiong, Ma, Di, Zhao, Mian, Qian, Jinjie, Li, Qipeng, Liu, Lei, and Wang, Zheng

Subjects
LIGHT emitting diodes, RHODAMINE B, SCANNING electron microscopy, THERMOGRAVIMETRY, X-ray diffraction
Abstract

Highly thermostable RhB@Zr-Eddc composites with the Rhodamine B (RhB) enclosed into the nanocages of Zr-Eddc was synthesized by one-pot method under hydrothermal conditions, whose structure, morphology and stability were characterized through the X-ray powder diffractometry (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). RhB@Zr-Eddc showed the highly thermal stability up to 550°C and emitted the bright red-light emission at 605 nm, which could highly selective detect the nitrofurazone (NFZ) among eleven other antibiotics in aqueous solution. Furthermore, via combining the RhB@Zr-Eddc with commercial green phosphor (Y3Al5O12:Ce3+, Ga3+), the mixture was encapsulated onto a 455 nm blue LED chip, creating an excellent white light emitting diode (WLED) device with the correlated colour temperature (CCT) of 4710 K, luminous efficiency (LE) of 43.17 lm/w and Color Rendering Index (CRI) of 89.2. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results