ORCID Profile
0000-0002-6005-9552
Current Organisation
Tianjin University
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Publisher: Wiley
Date: 10-08-2011
Publisher: Elsevier BV
Date: 2021
Publisher: Wiley
Date: 13-12-2020
Publisher: Wiley
Date: 11-01-2019
Publisher: Elsevier BV
Date: 06-2011
Publisher: Wiley
Date: 19-02-2013
Publisher: American Chemical Society (ACS)
Date: 30-10-2015
DOI: 10.1021/ACS.NANOLETT.5B03709
Abstract: Strong metal/oxide interactions have been acknowledged to play prominent roles in chemical catalysis in the gas phase, but remain as an unexplored area in electrocatalysis in the liquid phase. Utilization of metal/oxide interface structures could generate high performance electrocatalysts for clean energy storage and conversion. However, building highly dispersed nanoscale metal/oxide interfaces on conductive scaffolds remains a significant challenge. Here, we report a novel strategy to create metal/oxide interface nanostructures by growing mixed metal oxide nanoparticles on carbon nanotubes (CNTs) and then selectively promoting migration of one of the metal ions to the surface of the oxide nanoparticles and simultaneous reduction to metal. Employing this strategy, we have synthesized Ni/CeO2 nanointerfaces coupled with CNTs. The Ni/CeO2 interface promotes hydrogen evolution catalysis by facilitating water dissociation and modifying the hydrogen binding energy. The Ni/CeO2-CNT hybrid material exhibits superior activity for hydrogen evolution as a result of synergistic effects including strong metal/oxide interactions, inorganic/carbon coupling, and particle size control.
Publisher: Wiley
Date: 15-01-2022
Abstract: Aqueous zinc batteries, that demonstrate high safety and low cost, are considered promising candidates for large‐scale energy storage. However, Zn anodes suffer from rapid performance deterioration due to the severe Zn dendrite growth and side reactions. Herein, with a low‐cost ammonium acetate (NH 4 OAc) additive, a self‐regulated Zn/electrolyte interface is built to address these problems. The NH 4 + induces a dynamic electrostatic shielding layer around the abrupt Zn protuberance to make the Zn deposition uniform, and the OAc − acts as an interfacial pH buffer to suppress the proton‐induced side reactions and the precipitation of insoluble by‐products. As a result, in the electrolyte with the NH 4 OAc additive, Zn anodes exhibit a long cycling stability of 3500 h at 1 mA cm −2 , an impressive cumulative areal capacity of 5000 mAh cm −2 at 10 mA cm −2 , and a high Coulombic efficiency of ≈ 99.7%. A prototype full cell coupled with a NH 4 V 4 O 10 cathode performs much better in terms of capacity retention than the additive‐free case. The findings pave the way for developing practical Zn batteries.
No related grants have been discovered for Zhe Weng.