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首页> 外文期刊>RSC Advances >Selective ring opening of methylcyclopentane over surface-decorated Ir-Co bimetallic catalysts synthesized by galvanic replacement reaction
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Selective ring opening of methylcyclopentane over surface-decorated Ir-Co bimetallic catalysts synthesized by galvanic replacement reaction

机译：通过电镀替代反应合成的表面装饰IR-CO双金属催化剂的表面装饰IR-CO双金属催化剂的选择性环开度

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摘要

Surface-decorated Ir-Co bimetallic catalysts were synthesized by a modified galvanic replacement reaction and evaluated by the selective ring opening (SRO) of methylcyclopentane (MCP). Inductively coupled plasma atomic emission spectroscopy (ICP-AES) was utilized to characterize the catalyst synthesis process, and H-2-temperature-programmed reduction (H-2-TPR) was performed to characterize the reduction behavior of the calcined catalysts and oxidation resistance of the reduced catalysts. Transmission electron microscopy (TEM) analysis was used to characterize metallic particle size distribution. The reactor evaluation results show quite different behaviors in conversion and product selectivity of the surface-decorated Ir-Co/SiO2 and monometallic Ir/SiO2. At optimized Ir content, MCP conversion and mass-specific rate of SRO are significantly higher when catalyzed by surface-decorated Ir-Co/SiO2 than by monometallic Ir/SiO2. Moreover, compared with Ir/SiO2, Ir-Co/SiO2 has decreased 2-methylpentane selectivity but improved n-hexane selectivity. These catalytic behaviors were found to correlate with the surface-decorated bimetallic structure consisting of Co/SiO2 decorated with surface Ir atoms.
机译：通过改性的电催化反应合成表面装饰的IR-Co双金属催化剂，并通过甲基环戊烷（MCP）的选择性环开口（SRO）评价。电感耦合等离子体原子发射光谱（ICP-AES）用于表征催化剂合成方法，并进行H-2-温度编程的还原（H-2-TPR）以表征煅烧催化剂的还原行为和抗氧化性降低的催化剂。透射电子显微镜（TEM）分析用于表征金属粒度分布。反应器评估结果表明表面装饰的IR-CO / SiO2和单金属IR / SiO2的转化率和产品选择性相当不同的行为。在优化的IR含量下，当由表面装饰的IR-Co / SiO2催化而不是通过单金属IR / SiO 2催化，MCP转换和SRO的质量率明显更高。另外，与IR / SiO 2相比，IR-Co / SiO 2降低了2-甲基戊烷选择性，但改善了正己烷选择性。发现这些催化行为与由表面IR原子装饰的CO / SiO 2组成的表面装饰双金属结构相关。

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  • 来源
    《RSC Advances》 |2016年第107期|共7页
  • 作者

    Wang Zhen; Zheng Aiguo; Zheng Renyang; Li Mingfeng; Li Huifeng; Xu Guangtong; Xia Guofu;

  • 作者单位

    SINOPEC RIPP 18 Xueyuan Rd Beijing 100083 Peoples R China;

    SINOPEC RIPP 18 Xueyuan Rd Beijing 100083 Peoples R China;

    SINOPEC RIPP 18 Xueyuan Rd Beijing 100083 Peoples R China;

    SINOPEC RIPP 18 Xueyuan Rd Beijing 100083 Peoples R China;

    SINOPEC RIPP 18 Xueyuan Rd Beijing 100083 Peoples R China;

    SINOPEC RIPP 18 Xueyuan Rd Beijing 100083 Peoples R China;

    SINOPEC RIPP 18 Xueyuan Rd Beijing 100083 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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