Investigation of the Active Site for the Oxygen Reduction Reaction on the Oxide Surface Using by In-Situ XAFS Method
Investigation of the Active Site for the Oxygen Reduction Reaction on the Oxide Surface Using by In-Situ XAFS Method
复制标题
用原位 XAFS 方法研究氧化物表面氧还原反应的活性位点
DOI：
10.1149/08513.0865ecst
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
T. Maruyama
中科院分区：
文献类型：
--
作者：
T. Saida;Shoko Hirano;Etsuko Niwa;F. Sato;T. Maruyama
在这项研究中，氧化状态的Rh 2 O3，RuO 2，IrO 2在氧还原反应（ORR）进行了研究，使用原位X-射线吸附精细结构测量，以了解氧化物表面上的氧吸附的影响，作为ORR的第一步。在Rh_2O_3的情况下，氧化态的改变所施加的电位和饱和气体的种类。这一现象被认为是氧分子吸附在低价铑原子上的结果。我们的结果表明，ORR活性似乎与低电位区饱和气体对氧化态的改变有关。此外，我们首次观察到贵金属氧化物氧化态的变化。
In this study, the oxidation state of Rh2O3, RuO2, and IrO2 during the oxygen reduction reaction (ORR) was investigated using in-situ x-ray adsorption fine structure measurement in order to understand the influence of oxygen adsorption on the oxide surface as the first step of ORR. In case of Rh2O3, the oxidation state was changed by the applied potential and kind of saturated gas. It is thought that this phenomenon attributes to the oxygen molecules adsorbing to the low valence rhodium atom. Our results indicate that The ORR activity seems to relate to the variation of oxidation state by the saturated gas at the low potential region. In addition, we observed the variation of oxidation state in noble oxide at the first.