A WO₃/Ag-B_i oxygen-evolution catalyst for splitting water under mild conditions

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• 作者：Qiang Zhao ; Zhuobin Yu ; Wen Yuan ; Jinping Li
• 关键词：Electrodeposition ; Oxygen-evolving catalyst ; Oxygen evolution rate ; Water splitting ; Energy consumption
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 出版时间：September, 2012
• 年：2012
• 卷：37
• 期：18
• 页码：13249-13255
• 全文大小：1062 K

文摘

A WO₃/Ag-B_i based oxygen-evolution catalyst, combining an Ag-B_i catalyst with WO₃, has been prepared. This catalyst shows excellent catalytic activity for the splitting of water under mild conditions (near neutral, room temperature, and atmospheric pressure). The WO₃/Ag-B_i catalyst shows a high oxygen-evolution rate (30.85?¦Ìmol/h), a high Faradaic efficiency (91.30 % ), and a low oxygen-evolution overpotential (290?mV). Oxygen evolution and stability performance have been investigated by electrochemical measurements. The WO₃/Ag-B_i catalyst has been further characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), and X-ray photoelectron spectroscopy (XPS).