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1,610 results on '"Qiao, Shi‐Zhang"'

359. Atomically‐Scattered Active Centers Accelerating Photocatalytic Evolution of Ammonia.

Author

Ran, Jingrun, Talebian‐Kiakalaieh, Amin, and Qiao, Shi‐Zhang

Subjects
*AMMONIA, *PHOTOREDUCTION, *PHOTOCATALYSTS, *METAL-organic frameworks, *COPPER, *NITRIDES, *METALLIC oxides
Abstract

Photocatalytic N2 reduction to ammonia rises as a cost‐effective, environmentally benign, and efficient route to generate ammonia as a transportable/storable energy carrier and essential fertilizer. Recently, photocatalysts anchored with various atomically scattered active centers (ASACs), such as Ru, Fe, Au, Pt, Cu, Mo, and La, are extensively explored in photocatalytic N2‐to‐ammonia transformation. This review critically summarizes the current achievements in the synthesis of various photocatalyst supports (such as metal oxide, carbon nitride, metal‐organic framework, and covalent organic framework) anchored with the above‐mentioned ASACs for N2 reduction to form ammonia. The synthesis routes, structural/compositional characteristics, and performances of these ASACs anchored photocatalysts are summarized and introduced. Furthermore, the atomic‐scale relationship between the structure/composition and performance of these ASACs anchored photocatalysts is also introduced. The reaction mechanism including the reaction kinetics/thermodynamics, reaction pathways, and charge carrier kinetics, especially those revealed by various state‐of‐art characterization techniques, have been highlighted. This review also outlines the basic principles for the synthesis of novel photocatalysts aimed at ammonia evolution. Finally, the current challenges, opportunities, and future outlooks of ASACs anchored photocatalysts for ammonia evolution are introduced. [ABSTRACT FROM AUTHOR]

Published
2024
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360. Synergistic synthesis of quasi-monocrystal CdS nanoboxes with high-energy facets

Author

Han, Li-Li, Kulinich, Sergei A., Zhang, Yang-Yang, Zou, Jin, Liu, Hui, Wang, Wei-Hua, Li, Hao-Bo, Yang, Jing, Xin, Huolin L., Qiao, Shi-Zhang, and Du, Xi-Wen

Abstract

Hollow nanostructures with a highly oriented lattice structure and active facets are promising for catalytic applications, while their preparation via traditional approaches contains multiple steps and is time and energy consuming. Here, we demonstrate a new one-step strategy involving two complementary reactions which promote each other; it is capable of producing unique hollow nanoparticles. Specifically, we apply synergic cooperation of cation exchange and chemical etching to attack PbS nanosized cubes (NCs) and produce CdS quasi-monocrystal nanoboxes (QMNBs) which possess the smallest dimensions reported so far, a metastable zinc-blende phase, a large specific surface area, and particularly high-energy {100} facets directly visualized by aberration-corrected scanning transmission electron microscopy. These properties in combination allow the nanoboxes to acquire exceptional photocatalytic activities. As an extension of the approach, we use the same strategy to prepare Co9S8 and Cu7.2S4 single-crystal hollow nanooctahedrons (SCHNOs) successfully. Hence, the synergic reaction synthesis strategy exhibits great potential in engineering unique nanostructures with superior properties.

Published
2015

399. An Electrolytic Zn–MnO2 Battery for High‐Voltage and Scalable Energy Storage.

Author

Chao, Dongliang, Zhou, Wanhai, Ye, Chao, Zhang, Qinghua, Chen, Yungui, Gu, Lin, Davey, Kenneth, and Qiao, Shi‐Zhang

Subjects
ENERGY storage, GRID energy storage, LITHIUM-ion batteries, ELECTRIC batteries, ENERGY density, ELECTROLYSIS
Abstract

Zinc‐based electrochemistry is attracting significant attention for practical energy storage owing to its uniqueness in terms of low cost and high safety. However, the grid‐scale application is plagued by limited output voltage and inadequate energy density when compared with more conventional Li‐ion batteries. Herein, we propose a latent high‐voltage MnO2 electrolysis process in a conventional Zn‐ion battery, and report a new electrolytic Zn–MnO2 system, via enabled proton and electron dynamics, that maximizes the electrolysis process. Compared with other Zn‐based electrochemical devices, this new electrolytic Zn–MnO2 battery has a record‐high output voltage of 1.95 V and an imposing gravimetric capacity of about 570 mAh g−1, together with a record energy density of approximately 409 Wh kg−1 when both anode and cathode active materials are taken into consideration. The cost was conservatively estimated at

Published
2019
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