Demonstrating Concepts in Catalysis, Renewable Energy, and Chemical Safety with the Catalytic Oxidation of Hydrogen
Demonstrating Concepts in Catalysis, Renewable Energy, and Chemical Safety with the Catalytic Oxidation of Hydrogen
复制标题
通过氢催化氧化展示催化、可再生能源和化学安全方面的概念
DOI：
10.1021/acs.jchemed.1c00188
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发表时间：
2021
影响因子：
3
通讯作者：
Ribeiro, Fabio H.
中科院分区：
文献类型：
--
作者：
Cybulskis, Viktor J.;Gawecki, Piotr;Zvinevich, Yury;Gounder, Rajamani;Ribeiro, Fabio H.
开发了一种多功能便携式装置，用于展示催化现象的令人兴奋的视觉显示，介绍催化，可再生能源和化学安全的基本概念，以激发各种观众的科学好奇心，包括初中和高中学生，本科生和研究生以及普通公众。该演示使用铂催化的氧气氧化氢作为模型反应，以说明热力学，反应动力学和电化学的概念。该装置的设计包含固有的安全功能和多功能性，采用多种配置，在教室环境中进行广泛的实验，非正式的科学教育活动，和公共宣传活动。肥皂泡用于限制小的受控体积（<35 cm 3）的氢/氧气体混合物，并探测块状和纳米颗粒形式的铂的反应性，以说明高金属表面积如何增加催化反应速率。同时，氢/氧质子交换燃料电池用于演示如何从放热氢氧化反应释放的化学能可以通过使用含铂的电催化剂转化为电能。随着操作配置和设备的实验条件的调整，演示可以针对不同科学熟练程度的目标人口统计量身定制，以强调反应化学和工程主题的特定学习目标。潜在的危险和重要的安全预防措施得到解决。
A versatile and portable apparatus was developed to demonstrate exciting visual displays of catalytic phenomena that introduce basic concepts in catalysis, renewable energy, and chemical safety, in order to pique scientific curiosity in a variety of audiences including middle and high school students, undergraduate and graduate students, and the general public. The demonstration uses the platinum-catalyzed oxidation of hydrogen by oxygen as a model reaction to illustrate concepts in thermodynamics, reaction kinetics, and electrochemistry. The apparatus was designed to contain inherent safety features and the versatility to adopt several configurations to perform a wide range of experiments in classroom settings, informal science education activities, and public outreach events. Soap bubbles are used to confine small, controlled volumes (<35 cm3) of hydrogen/oxygen gas mixtures and probe the reactivity of bulk and nanoparticle forms of platinum to illustrate how high metal surface areas increase catalytic reaction rates. In parallel, a hydrogen/oxygen proton-exchange fuel cell is used to demonstrate how chemical energy released from the exergonic hydrogen oxidation reaction can be converted into electricity by using a platinum-containing electrocatalyst. With adjustments of the operating configuration and the experimental conditions of the apparatus, the demonstrations can be tailored toward target demographics of varying scientific proficiency to emphasize specific learning objectives for topics in reaction chemistry and engineering. Potential hazards and important safety precautions are addressed.
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