Making Water the Exciting Way: A Classroom Demonstration of Catalysis
Making Water the Exciting Way: A Classroom Demonstration of Catalysis
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让水成为令人兴奋的方式：催化的课堂演示
DOI：
10.1021/ed4006024
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发表时间：
2014
影响因子：
3
通讯作者：
B. Hashiguchi
中科院分区：
文献类型：
--
作者：
Ryan L. Stowe;S. Bischof;Michael M. Konnick;C. Hövelmann;D. Leach;R. Periana;B. Hashiguchi
事实证明，对于许多开始学习化学科学概论课程的学生来说，对控制化学反应速率的因素的理解是难以捉摸的。探究性课程建立在理解学生对化学动力学的常见误解的基础上，已被证明是一种比传统讲座形式更有效的方法，通过这种方法可以培养学生的理解。为了便于教师指导的关于催化主题的讨论，我们开发了一个简单而安全的演示，即在铂/钌催化剂的帮助下，在室温下电解水产生的氢和氧成分重新组合。这个演示的目的是吸引学生注意催化剂的参与会影响反应速率的巨大变化，并引发关于伴随反应催化的机制变化的对话。
An understanding of the factors that govern the rate of chemical reactions has proven elusive for many students who begin a survey course in the chemical sciences. Inquiry-based curricula built upon an understanding of common student misconceptions related to chemical kinetics have proven to be a more effective means by which to develop student understanding than traditional lecture formats. To facilitate teacher-guided discussion regarding the subject of catalysis, we have developed a simple and safe demonstration, whereby the hydrogen and oxygen components evolved upon electrolysis of water are recombined at room temperature with the aid of a platinum/ruthenium catalyst. This demonstration is designed to draw students’ attention toward the dramatic change in reaction rate that can be affected by catalyst involvement and to provoke dialog regarding the mechanistic changes that accompany reaction catalysis.