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165 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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14. 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

Subjects
CHEMICAL processes, CLIMATE change, OZONE-depleting substances, METAL catalysts, MANUFACTURING processes, NITROUS oxide, GREENHOUSE gases
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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44. Designing interstitial boron‐doped tunnel‐type vanadium dioxide cathode for enhancing zinc ion storage capability.

Author

Wang, Shiwen, Zhang, Hang, Zhao, Kang, Liu, Wenqing, Luo, Nairui, Zhao, Jianan, Wu, Shide, Ding, Junwei, Fang, Shaoming, and Cheng, Fangyi

Abstract

Chemical doping is a powerful method to intrinsically tailor the electrochemical properties of electrode materials. Here, an interstitial boron‐doped tunnel‐type VO2(B) is constructed via a facile hydrothermal method. Various analysis techniques demonstrate that boron resides in the interstitial site of VO2(B) and such interstitial doping can boost the zinc storage kinetics and structural stability of VO2(B) cathode during cycling. Interestingly, we found that the boron doping level has a saturation limit peculiarity as proved by the quantitative analysis. Notably, the 2 at.% boron‐doped VO2(B) shows enhanced zinc ion storage performance with a high storage capacity of 281.7 mAh g−1 at 0.1 A g−1, excellent rate performance of 142.2 mAh g−1 at 20 A g−1, and long cycle stability up to 1000 cycles with the capacity retention of 133.3 mAh g−1 at 5 A g−1. Additionally, the successful preparation of the boron‐doped tunnel‐type α‐MnO2 further indicates that the interstitial boron doping approach is a general strategy, which supplies a new chance to design other types of functional electrode materials for multivalence batteries. [ABSTRACT FROM AUTHOR]

Published
2023
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50. Constructing single-atomic nickel sites in carbon nanotubes for efficient CO2 electroreduction.

Author

Wu, Shide, Yi, Feng, Ping, Dan, Huang, Siguang, Zhang, Yifei, Han, Lifeng, Wang, Shiwen, Wang, Heng, Yang, Xuzhao, Guo, Dongjie, Liu, Guoji, and Fang, Shaoming

Subjects
*CARBON nanotubes, *CATALYSIS, *CARBON dioxide, *ELECTROLYTIC reduction, *NICKEL, *PHOTOREDUCTION, *SURFACE defects, *PYROLYSIS
Abstract

Electrochemical CO 2 reduction (ECR) has been considered as the most promising route to convert CO 2 into fuels, but suffers inferior conversion efficiency and product selectivity due to the lack of effective electrocatalysts. Herein, the N-coordinated single-atomic Ni active sites embedded in porous carbon nanotubes (Ni/N-CNTs) are constructed through one-pot pyrolysis strategy as an efficient ECR electrocatalyst. The Zn source in pyrolysis plays a key role in the formation of bamboo-like CNTs, and increased concentrations of surface defects and single-atomic Ni sites of the electrocatalyst. All these benefits endow the electrocatalyst with excellent ECR performance, achieving a large CO Faradaic efficiency (FE CO) up to 98% and turnover frequency up to 304.5 h−1 at a relatively low potential of −0.65 V vs. RHE. Furthermore, over 80% FE CO can be maintained in a wide potential range from −0.57 to −0.81 V. In addition, the electrocatalyst also shows high operation stability for 20 h without obvious FE CO and j CO decay. We believe this study will shed a new light on the design of highly efficient M/N–C catalyst for ECR systems. [Display omitted] • Single-atomic nickel active sites in carbon nanotubes is developed via Zn-assisted pyrolysis method. • High performance for electrochemical CO 2 reduction with CO Faradaic efficiency of 98% at a overpotential of 540 mV. • Improved nanotubular morphology, increased concentrations of defects and single Ni active sites achieved by Zn addition. • Unveiling the decisive catalytic effect of single-atomic Ni sites in catalyzing CO2 electroreduction. [ABSTRACT FROM AUTHOR]

Published
2022
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