A mild H₃BO₃ environment for water splitting

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• 作者：Zhuobin Yu ; Qiang Zhao ; Genyan Hao ; Wen Yuan ; Jinping Li
• 关键词：Electrodeposition ; Oxygen-evolving catalyst ; Electrolyte ; Water splitting
• 刊名：International Journal of Hydrogen Energy
• 出版年：2013
• 出版时间：21 August, 2013
• 年：2013
• 卷：38
• 期：25
• 页码：10191-10195
• 全文大小：1378 K

文摘

A weakly acidic H₃BO₃ solution (pH?=?5.1) was used to synthesize new oxygen-evolution catalysts for water splitting under mild conditions. Two novel oxygen-evolution catalysts, Co-BA_i and Mn-BA_i (BA_i?=?inorganic boric acid), were obtained in the H₃BO₃ solution with added Co²⁺ and Mn²⁺, respectively. The average oxygen evolution rate in the H₃BO₃ solution with Co²⁺ was 0.3133?¦Ìmol/h, about 70 times greater than the rate without a metal ion; the rate with Mn²⁺ was 1.13?¦Ìmol/h, about 250 times greater. The phases, morphologies, and compositions of the Co-BA_i and Mn-BA_i catalysts were analysed by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy.