用x射线吸收光谱分析Ir-MgO固溶体的形成

IF 2.1 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Surveys from Asia Pub Date : 2022-11-03 DOI:10.1007/s10563-022-09378-4

Kazu Okumura, Hitomi Hoshi, Hikaru Iiyoshi

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引用次数: 0

摘要

热处理负载mgo的Ir纳米颗粒或Ir(OAc)3形成Ir - mgo固溶体。Ir - mgo固溶体中Ir的价态为3 +，由Ir L3-edge XANES结合XPS分析证实。与MgO中最近的相邻的Mg-O键相比，观察到Ir-O键的距离略有缩小。由于固溶体的形成和连续偏析，Ir-MgO的分散随处理温度的变化呈现出双尖峰模式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Formation of Ir–MgO Solid Solutions Analyzed with X-ray Absorption Spectroscopy

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Formation of Ir–MgO Solid Solutions Analyzed with X-ray Absorption Spectroscopy

Thermal treatment of MgO-loaded Ir nanoparticles or Ir(OAc)₃ formed Ir–MgO solid solutions. The valence of Ir in the Ir–MgO solid solution was 3 +, as evidenced by Ir L₃-edge XANES combined with XPS analysis. A slight contraction of the Ir–O bond distance was observed compared to that of the nearest neighboring Mg–O bond in MgO. Ir–MgO dispersion exhibited a two-spike pattern depending on the treatment temperature owing to the formation and successive segregation of the solid solutions.

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来源期刊

Catalysis Surveys from Asia 化学-物理化学

CiteScore

4.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Early dissemination of important findings from Asia which may lead to new concepts in catalyst design is the main aim of this journal. Rapid, invited, short reviews and perspectives from academia and industry will constitute the major part of Catalysis Surveys from Asia . Surveys of recent progress and activities in catalytic science and technology and related areas in Asia will be covered regularly as well. We would appreciate critical comments from colleagues throughout the world about articles in Catalysis Surveys from Asia . If requested and thought appropriate, the comments will be included in the journal. We will be very happy if this journal stimulates global communication between scientists and engineers in the world of catalysis.