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260 results on '"Wu, Shide"'

8. A universal route to graft highly dispersed cobalt phthalocyanine on porous carbon for efficient CO2 electroreduction.

Author

Wu, Shide, Gao, Mengjin, Ping, Dan, Huang, Siguang, Zhang, Qikang, Liu, Shuqing, Wang, Zheming, and Fang, Shaoming

Abstract

Cobalt phthalocyanine (CoPc) has drawn increasing attention in CO2 electroreduction to CO due to its clear coordination structure (Co–N4–C) and high selectivity. However, its performance is severely restrained by its poor stability and low conductivity. Herein, a promising catalyst for dispersing CoPc on three-dimensional porous carbon (PC) was prepared via a pyrolysis procedure using NaCl as the template. Benefiting from the high intrinsic activity and large exposure of active sites, as well as the unique carbon architecture with facilitated mass transportation, the derived CoPc/PC catalyst shows impressive performance for CO2 electroreduction. The CO faradaic efficiency achieves a maximum value of 95% accompanied by a CO partial current density of 20.5 mA cm−2. The study paves a new avenue for the fabrication of high-efficiency molecular catalysts for CO2 conversion. [ABSTRACT FROM AUTHOR]

Published
2024
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9. Low-Temperature and High-Efficiency Catalytic Conversion N2O to N2 in the Presence of CO over Nonnoble Metal Cu–Fe Catalyst.

Author

Zhang, Jianqiang, Li, Yanyan, Cai, Lifang, Li, Yakun, Yang, Xuzhao, Zhang, Yingying, Han, Jingli, and Wu, Shide

Abstract

Nitrous oxide (N2O) is a long-lived stratospheric ozone-depleting substance with an atmospheric lifetime of 116 years. It is also a greenhouse gas with a global warming potential value of about 310. Due to its high kinetic stability and thermal decomposition temperature exceeding 1000°C, the treatment and recovery of nitrous oxide pose significant engineering and climate challenges. In this study, we introduce a Cu–Fe oxide catalyst that demonstrates efficient and low-temperature conversion of N2O to N2 using readily available reductant CO. The oxide catalyst was synthesized by a solvothermal method and a "from bottom to top" technique. Characterizations by X-ray diffraction (XRD), CO temperature-programmed desorption (C-O‑TPD), scanning electron microscopy (SEM), and BET indicate that the catalyst with weaker CO adsorption sites, fewer strong CO adsorption sites, suitable particle size, good dispersion and high specific surface area performs excellent reaction activity in the reduction of N2O to N2 by CO. The active site of Cu is stronger, and the addition of Fe can promote dispersion of the Cu active site and increase the exposure to the active site. A new approach has been proposed to address nitrous oxide emissions, a greenhouse gas with high thermodynamic stability, in the chemical industrial process that generates nitrous oxide as a byproduct. [ABSTRACT FROM AUTHOR]

Published
2024
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49. Research progress on recycle utilization of pyrolytic carbon from waste tires.

Author

PING Dan, HUANG Siguang, ZHANG Guanming, YU Tao, MAO Wenzheng, LEI Shulian, FANG Shaoming, and WU Shide

Subjects
PYROLYTIC graphite, WASTE tires, ASPHALT modifiers, PYROLYSIS kinetics, TIME pressure, TIRE retreading & recapping, RUBBER industry
Abstract

As to the issue that the quality and market application of waste tires derived pyrolytic carbon derived from waste tires directly affect the economy of the pyrolysis process, the pyrolysis techndogy, main influencing factors and recycle utilization of pyrolytic carbon were reviewed. It was found that the pyrolysis of waste was a complex process, which was mainly affected by pyrolysis temperature, heating rate, operating pressure and rection time. The rate of carbon content of pyrolytic carbon of more than 80%. It has been widely used in the preparation of active carbon, the rubber reinforcing agent, the asphalt modifier, the battery and ink materials, etc. In the future, the pyrolysis system of waste tires should be further optimized, and the pyrolysis mechanism and kinetics process should be further studied to realize the precise control of the pyrolysis. Meanwhile, the integrated technology integratingwaste tires pretreatment, pyrolysis and pyrolytic carbon deep processing should be developed to further improve the quality of pyrolytic carbon and broaden its applications, finally realizing the efficient utilization of pyrolytic carbon. [ABSTRACT FROM AUTHOR]

Published
2022
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