A highly efficient La/Ni co-doped strontium titanate (LSNT) perovskite catalyst is developed and integrated in a protonic ceramic electrochemical cell for co-production of propylene and high-purity hydrogen from commercial propane feedstock. Propane conversion and hydrogen production rate can be effectively enhanced under an applied current due to the electrochemical promotion effect and/or shifted reaction equilibrium induced by rapid separation of hydrogen product. Water vapor in the feed gas could significantly improve the catalyst stability by suppressing the coke formation. The propane conversion could reach up to 53% at 600 °C under a current density of 90 mA cm. The LSNT catalyst also shows excellent tolerance for the sulfur contaminant in commercial propane gas. The excellent performance of the LSNT catalyst is attributed to the highly active and selective Ni species at the interface with the perovskite substrate, which are formed via reduction-induced exsolution under reaction conditions.

中文翻译：

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用于质子陶瓷电化学电池中丙烷联产丙烯和氢气的高效 La/Ni 共掺杂钛酸锶催化剂


开发了一种高效的 La/Ni 共掺杂钛酸锶 (LSNT) 钙钛矿催化剂，并将其集成到质子陶瓷电化学电池中，用于从商业丙烷原料中联产丙烯和高纯度氢气。由于氢气产物快速分离引起的电化学促进效应和/或反应平衡移动，在施加电流下可以有效提高丙烷转化率和氢气产率。原料气中的水蒸气可以通过抑制焦炭的形成来显着提高催化剂的稳定性。在600℃、90mAcm电流密度下，丙烷转化率可达53%。 LSNT 催化剂还对商用丙烷气体中的硫污染物表现出优异的耐受性。 LSNT催化剂的优异性能归因于与钙钛矿基底界面处的高活性和选择性Ni物种，它们是在反应条件下通过还原诱导的脱溶形成的。