Search

Your search keyword '"Sun, Runcang"' showing total 201 results
Start Over Author "Sun, Runcang" Publication Year Range Last 3 years
201 results on '"Sun, Runcang"'

45. Efficient photocatalytic conversion of xylose to co-produce xylonic acid and CO via a dual S-scheme heterojunction photocatalyst between carbon nitride and CuInS2 quantum dot-sensitized ZnIn2S4.

Author

Liu, Kangning, Zhang, Junqiang, Ma, Jiliang, and Sun, Runcang

Subjects
HETEROJUNCTIONS, QUANTUM dots, NITRIDES, XYLOSE, LIGHT absorption
Abstract

Heterojunction photocatalysts receive significant interest due to their high performance and easy fabrication. An S-scheme heterojunction is developed on the basis of conventional type II heterojunctions, which can further promote charge separation and migration. In this work, a photocatalyst with a dual S-scheme heterojunction (denoted as C-s-ZIS/CN) is developed by the hybridization of CuInS2 quantum dot-sensitized ZnIn2S4 nanosheets and g-C3N4 nanosheets. CuInS2 quantum dot sensitization efficiently enhanced light absorption. Meanwhile, the unique charge migration pathway in the dual S-scheme heterojunction accelerated the separation and transfer of photogenerated carriers. The photocatalyst was innovatively employed in the simultaneous photocatalytic production of xylonic acid and CO. Under 10 W LED light irradiation (790 mW cm−2), the CO evolution rate reached a high of 228.94 μmol g−1 h−1. When a xenon lamp was employed, the CO evolution rate increased to 964.27 μmol g−1 h−1. Moreover, the optimal xylonic acid yield achieved was up to 58.56%. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

46. Dual‐single‐atoms of Pt–Co boost sulfur redox kinetics for ultrafast Li–S batteries.

Author

Wu, Hanyan, Gao, Xuejie, Chen, Xinyang, Li, Weihan, Li, Junjie, Zhang, Lei, Zhao, Yang, Jiang, Ming, Sun, Runcang, and Sun, Xueliang

Abstract

Applications of lithium–sulfur (Li–S) batteries are still limited by the sluggish conversion kinetics from polysulfide to Li2S. Although various single‐atom catalysts are available for improving the conversion kinetics, the sulfur redox kinetics for Li–S batteries is still not ultrafast. Herein, in this work, a catalyst with dual‐single‐atom Pt‐Co embedded in N‐doped carbon nanotubes (Pt&Co@NCNT) was proposed by the atomic layer deposition method to suppress the shuttle effect and synergistically improve the interconversion kinetics from polysulfides to Li2S. The X‐ray absorption near edge curves indicated the reversible conversion of Li2Sx on the S/Pt&Co@NCNT electrode. Meanwhile, density functional theory demonstrated that the Pt&Co@NCNT promoted the free energy of the phase transition of sulfur species and reduced the oxidative decomposition energy of Li2S. As a result, the batteries assembled with S/Pt&Co@NCNT electrodes exhibited a high capacity retention of 80% at 100 cycles at a current density of 1.3 mA cm−2 (S loading: 2.5 mg cm−2). More importantly, an excellent rate performance was achieved with a high capacity of 822.1 mAh g−1 at a high current density of 12.7 mA cm−2. This work opens a new direction to boost the sulfur redox kinetics for ultrafast Li–S batteries. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results