Remarkable Improvement in Water Oxidation Catalysis by Moderate Heat Treatment of a Crystalline Silver‐Based Thin Film Developed In‐Situ From Silver‐ions in Acetate Solution,ChemistrySelect

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Remarkable Improvement in Water Oxidation Catalysis by Moderate Heat Treatment of a Crystalline Silver‐Based Thin Film Developed In‐Situ From Silver‐ions in Acetate Solution
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-01-15 , DOI: 10.1002/slct.201702876
Samit Majumder _{1,

2} , Ashraf Abdel Haleem _{1,

3} , Perumandla Nagaraju ₁ , Yoshinori Naruta _{1,

4}

Affiliation

Water oxidation is an important half‐reaction to achieve overall water splitting. Therefore, the development of efficient electrocatalysts for water oxidation is an avenue to improve the competence of fuel generation technology. In this study, a crystalline silver‐based film (Ag_xO), electrodeposited in‐situ on FTO electrodes from a sodium acetate solution containing silver ions at pH ∼6, shows a remarkable improvement in the water oxidation catalysis after heat treatment at moderate temperature (100 °C). The morphology, nature and composition of the thin films were fully characterized by scanning electron microscopy, atomic force microscopy, powder X‐ray diffraction, X‐ray photoelectron and energy dispersive X‐ray spectroscopies. The electrode, annealed at 100 °C, generates a sustain current density ∼2.25 mA•cm^–2 for at least 12 h, which is almost two order of magnitude larger than the as‐deposited electrode in a sodium borate buffer solution of pH 9.2.

中文翻译：

通过适度热处理醋酸银溶液中的银离子就地形成的结晶银基薄膜，可以显着改善水氧化催化性能

水氧化是实现整体水分解的重要半反应。因此，开发用于水氧化的有效电催化剂是提高燃料产生技术能力的途径。在这项研究中，结晶的银基薄膜（Ag _xO）是在pH值为6的含银离子的乙酸钠溶液中原位沉积在FTO电极上的，在中等温度（100°C）的热处理后，水氧化催化能力得到了显着改善。通过扫描电子显微镜，原子力显微镜，粉末X射线衍射，X射线光电子和能量色散X射线光谱学充分表征了薄膜的形态，性质和组成。电极在100°C退火后，至少持续12 h会产生约2.25 mA•cm ^–2的维持电流密度，这比在pH 9.2的硼酸钠缓冲溶液中沉积的电极大将近两个数量级。。

更新日期：2018-01-15

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