Upgrade in catalytic activity of hydrophobic platinum catalysts by irradiation with electron beams
Upgrade in catalytic activity of hydrophobic platinum catalysts by irradiation with electron beams
复制标题
通过电子束辐照提升疏水性铂催化剂的催化活性
DOI：
10.1016/j.fusengdes.2015.03.024
复制
发表时间：
2015
影响因子：
1.7
通讯作者：
Yasunori IWAI
中科院分区：
文献类型：
--
作者：
M. Nakamura;K. Tobita;Y. Someya;H. Tanigawa;W. Gulden et al.;Yasunori IWAI
疏水铂催化剂的开发对实现聚变安全被动复合器具有重要意义。疏水铂催化剂的催化活性需要升级，因为催化剂的催化活性通常随着温度的降低而降低。为了提高颗粒状聚合物负载的疏水铂催化剂的催化活性，已经展示了电子束辐照的应用。用电子束辐照后，通过评估氚氧化的总反应速率常数来评价催化活性。总反应速率常数随剂量增加而增加。该常数在500 ~ 750 kGy剂量范围内出现峰值。在峰值之后，常数随剂量增加而减小。在峰值处的总反应速率常数比未辐照的评价值大6倍。辐照后催化剂的机械强度在1500 kGy前保持完整。辐照是提高Pt/SDBC类催化剂催化活性的一种很有前途的方法。
The development of hydrophobic platinum catalysts is important to realize the passive recombiner for fusion safety. The upgrade in catalytic activity of hydrophobic platinum catalysts is required since the catalysts generally decrease in catalytic activity with a decrease in temperature. To upgrade in catalytic activity of granular polymer supported hydrophobic platinum catalysts, application of irradiation with electron beams has demonstrated. After irradiation with electron beams, the catalytic activity was evaluated by means of assessing overall reaction rate constant for the oxidation of tritium. The overall reaction rate constant increased as increase in dose. The constant showed the peak value in the dose between 500 and 750 kGy. After the peak, the constant decreased as increase in dose. The overall reaction rate constant at the peak was 6 times larger than that evaluated with unirradiated. The mechanical strength of irradiated catalysts kept integrity until 1500 kGy. The irradiation is a promising method to the upgrading in catalytic activity of Pt/SDBC group catalysts.