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Your search keyword '"Zhong, Liangshu"' showing total 134 results
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134 results on '"Zhong, Liangshu"'

14. Engineering ZrO2–Ru interface to boost Fischer-Tropsch synthesis to olefins.

Author

Yu, Hailing, Wang, Caiqi, Xin, Xin, Wei, Yao, Li, Shenggang, An, Yunlei, Sun, Fanfei, Lin, Tiejun, and Zhong, Liangshu

Subjects
RUTHENIUM catalysts, FISCHER-Tropsch process, HETEROGENEOUS catalysis, ACTIVATION energy, INTERFACIAL reactions, CATALYST synthesis
Abstract

Understanding the structures and reaction mechanisms of interfacial active sites in the Fisher-Tropsch synthesis reaction is highly desirable but challenging. Herein, we show that the ZrO2-Ru interface could be engineered by loading the ZrO2 promoter onto silica-supported Ru nanoparticles (ZrRu/SiO2), achieving 7.6 times higher intrinsic activity and ~45% reduction in the apparent activation energy compared with the unpromoted Ru/SiO2 catalyst. Various characterizations and theoretical calculations reveal that the highly dispersed ZrO2 promoter strongly binds the Ru nanoparticles to form the Zr-O-Ru interfacial structure, which strengthens the hydrogen spillover effect and serves as a reservoir for active H species by forming Zr-OH* species. In particular, the formation of the Zr-O-Ru interface and presence of the hydroxyl species alter the H-assisted CO dissociation route from the formyl (HCO*) pathway to the hydroxy-methylidyne (COH*) pathway, significantly lowering the energy barrier of rate-limiting CO dissociation step and greatly increasing the reactivity. This investigation deepens our understanding of the metal-promoter interaction, and provides an effective strategy to design efficient industrial Fisher-Tropsch synthesis catalysts. Understanding the structures of interfacial active sites is crucial in heterogeneous catalysis. Here the authors demonstrate that a ZrO2-Ru interface site significantly enhances reactivity in the Fischer-Tropsch to olefins process by altering the H-assisted CO dissociation route due to the presence of hydroxy species associated with Zr-OH*. [ABSTRACT FROM AUTHOR]

Published
2024
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23. Recent Advances in the Conversion of Methane to Syngas and Chemicals via Photocatalysis.

Author

Li, Ruitao, Zheng, Yihan, Gong, Kun, He, Zhanjun, Dai, Yuanyuan, Niu, Qiang, Lin, Tiejun, and Zhong, Liangshu

Subjects
SYNTHESIS gas, PHOTOCATALYSIS, SHALE gas, SOLAR energy conversion, NATURAL gas, PHOTOCATALYTIC oxidation, OIL shales
Abstract

As a primary constituent of natural gas and shale gas, direct conversion of methane has attracted significant attention due to its potential to reduce energy consumption and CO2 emissions. Compared with thermal catalysis, photocatalysis has the capacity to transcend thermodynamic constraint and enable the conversion of sustainable solar energy into chemical energy under mild reaction condition, which contributes to optimize the utilization of methane. In this review, we undertake a comparative analysis of various strategies for photocatalytic methane conversion to syngas and chemicals, including photocatalytic reforming of methane, photocatalytic partial oxidation of methane and photocatalytic coupling of methane. The distinct reaction systems with corresponding catalysts and underlying mechanisms are expounded in detail to foster a profound comprehension of solar‐driven methane conversion. Finally, the challenges and prospectives in photocatalytic methane conversion are discussed. [ABSTRACT FROM AUTHOR]

Published
2024
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41. Effective SrWO4/TiO2 Heterojunction with Enhanced Carriers Separation and Transfer for Photocatalytic Methane Oxidation.

Author

Huang, Min, Zhang, Shuyi, Gan, Yongping, Liu, Jin, He, Zhanjun, Lin, Tiejun, Yu, Fei, Dai, Yuanyuan, Niu, Qiang, and Zhong, Liangshu

Subjects
PHOTOCATALYTIC oxidation, HETEROJUNCTIONS, REACTIVE oxygen species, CATALYTIC oxidation
Abstract

Photocatalytic methane oxidation to oxygenates with promising performance remains as a grand challenge due to the low productivity and severe overoxidation. Herein, SrWO4/TiO2 heterojunction was developed for photocatalytic methane oxidation with O2 to liquid oxygenates (Please replace "oxygenates" with "oxygenated")products under mild reaction conditions. The optimized SrWO4/TiO2 catalyst exhibited high productivity of 13365 μmol/g with high selectivity of 98.7 % for oxygenates. Benefited from the intimate heterojunction interface of SrWO4/TiO2, the constructed I‐type heterostructure improved the separation and transfer of photogenerated carriers, and a high‐speed transfer channel for photogenerated carriers was fabricated. Simultaneously, the special band structure can increase the amount of photogenerated electrons and holes on the TiO2 surface, which promoted the formation of reactive oxygen species to enhance liquid oxygenates productivity. [ABSTRACT FROM AUTHOR]

Published
2023
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