通过红外光谱学确定基点的氧化物度
Jerzy Podobiński1, Michał Śliwa2, Jerzy Datka1
1Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Kraków, Poland.
概括
这项研究引入了一种新的红外光谱法,用于精确测量像ZrO2和CeO2.2这样的氧化物的基本位点. 这种技术允许分别量化氧化物 (O2-) 和基 (OH-) 基位,这对于催化剂的发展至关重要.
科学领域:
- 表面化学 表面化学
- 材料科学是一种材料科学.
- 催化剂是一种催化剂.
背景情况:
- 二氧化碳 (CO2) 通常与金属氧化物上的氧化物 (O2-) 和基 (OH-) 基位反应,形成碳酸盐和碳酸盐.
- 红外 (IR) 光谱法是监测这些反应的标准技术,但区分不同基本位点类型一直是具有挑战性的.
研究的目的:
- 在ZrO2和CeO2.2上开发选择性CO2与O2反应的实验条件.
- 计算碳酸盐和二碳酸盐物种的灭绝系数.
- 为了使O2-和OH-基位度在各种氧化物上使用红外光谱学进行单独测量.
主要方法:
- 在ZrO2和CeO2.2上制定了针对选择性CO2与O2交互的特定实验条件.
- 碳酸盐和二碳酸盐物种诊断红外波段的灭绝系数的计算.
- 应用开发的IR方法来量化ZrO2,CeO2,Al2O3和CuO上的O2-和OH-基位.
主要成果:
- 成功开发了一种IR方法,用于选择性CO2反应与O2-站点.
- 碳酸盐和二碳酸盐物种的灭绝系数的确定.
- 首次对ZrO2,CeO2,Al2O3和CuO上的O2-和OH-基位进行单独的量化.
- 通过将结果与CO2脉冲吸附测量结果进行比较,验证IR方法.
- 研究热处理对氧化物基本性的影响.
结论:
- 计算的灭绝系数适用于各种基本催化剂的基于IR的基本性研究.
- 开发的IR方法提供了一种可靠的方法,可以单独确定O2和OH-度.
- 热处理显著影响所研究的氧化物的基本性.
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