首页> 外文期刊>Kinetics and catalysis >Formation of Platinum Sites on Layered Double Hydroxides Type Basic Supports: I. Effect of the Nature of the Interlayer Anion on the Structure Characteristics of the Layered Aluminum–Magnesium Hydroxide and the Formation of an Oxide Phase
【24h】

Formation of Platinum Sites on Layered Double Hydroxides Type Basic Supports: I. Effect of the Nature of the Interlayer Anion on the Structure Characteristics of the Layered Aluminum–Magnesium Hydroxide and the Formation of an Oxide Phase

机译:在层状双氢氧化物型基本载体上铂位的形成:I.层间阴离子的性质对层状铝镁氢氧化物结构特征和氧化物相形成的影响

获取原文
获取原文并翻译 | 示例
获取外文期刊封面目录资料

摘要

A layered aluminum–magnesium hydroxide of the hydrotalcite type containing interlayer carbon-ate counterions (HT-CO_3) and activated hydrotalcite containing interlayer OH~– ions (HT-OH) were studied for the subsequent use as the precursors of supports for platinum catalysts. It was found that the nature of an interlayer anion in the composition of an aluminum–magnesium layered hydroxide is an important factor affecting both the formation of the oxide support and its texture characteristics. The replacement of the inter-layer CO_3~(2-) anion by OH~– resulted in changes in the structural parameters of the initial double hydroxide: a decrease in the interlayer distance with the retention of the Mg/Al ratio and an increase in the imperfection of the layered material. X-ray diffraction studies in the temperature range of 30–900°C showed that HT-OH is characterized by the ability to form low-temperature spinel at 375°C. As a result, two types of aluminum–magnesium oxide supports, which were characterized by different pore space organizations at the same Mg : Al ratio, were obtained from the given layered hydroxides.
机译:研究了含有层间碳酸盐抗衡离子(HT-CO_3)和含有层间OH〜-离子的活性水滑石(HT-OH)的水滑石类型的层状铝镁氢氧化物,随后用作铂催化剂载体的前体。发现铝镁层状氢氧化物成分中的层间阴离子的性质是影响氧化物载体的形成及其织构特性的重要因素。用OH〜-代替层间CO_3〜(2-)阴离子导致初始双氢氧化物的结构参数发生变化:层间距离减小且Mg / Al比例保持不变,且层状材料的缺陷。在30–900°C的温度范围内进行的X射线衍射研究表明,HT-OH的特征在于能够在375°C的温度下形成低温尖晶石。结果,从给定的层状氢氧化物中获得了两种类型的铝镁氧化物载体,其特征在于在相同的Mg:Al比例下具有不同的孔隙空间组织。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号