Center for Energy and Environmental Science, Friedrich-Schiller-University Jena, Philosophenweg 7a, 07743 Jena, Germany.
Phys Chem Chem Phys. 2019 Oct 24;21(41):23009-23016. doi: 10.1039/c9cp02510c.
The pyro-electro-catalytic induced generation of hydrogen gas is an environmentally friendly and sustainable way to convert excess thermal energy into a storable form. The main idea is to make use of spontaneous polarization of pyroelectric materials that can be altered by temperature changes. Thus, surface potential changes and subsequent electron exchange with surrounding molecules can be induced. In this work, a fundamental model to describe the behavior of a thermally excited pyroelectric material in pure water is developed. The model combines the fields of pyroelectricity, electrochemistry, diffusion and semiconductor theory. After derivation, it was used to explore some basic questions on pyro-electro-catalytic hydrogen production and the accuracy was tested with experimental data. The results show that p/εr has to be balanced depending on the temperature gradient to maximize the hydrogen production. The validation of the experimental data revealed good agreement.
热释电-电催化诱导氢气生成是一种将过剩热能转化为可存储形式的环保、可持续方法。其主要思想是利用热释电材料的自发极化，这种极化可以通过温度变化来改变。因此，可以诱导表面电势变化和随后与周围分子的电子交换。在这项工作中，开发了一个描述在纯水中热激发热释电材料行为的基本模型。该模型结合了热释电、电化学、扩散和半导体理论领域。经过推导，它被用于探讨热释电-电催化制氢的一些基本问题，并通过实验数据进行了验证。结果表明，为了最大化产氢量，必须根据温度梯度平衡 p/εr。实验数据的验证表明吻合良好。
