Thermal catalytic oxidative dehydrogenation of ethane with O₂ has been extensively studied as an approach for ethene production, but this approach is energy intensive and has disadvantages of overoxidation, high-cost and safety concerns. Herein, we present ZnO-supported Pt nanoparticles that are highly active and selective for dehydrogenating ethane to ethene with simulated sunlight via a photo-supported Mars–van Krevelen mechanism. The Pt/ZnO catalyst achieves a high ethane-to-ethene conversion rate of 867.8 μmol h⁻¹ g⁻¹ and an excellent selectivity of 97.56%. Besides, it is also coking-resistant and can be readily revived by exposure to O₂ for refilling the consumed lattice oxygen to preserve its original activity. It is revealed that the Pt species facilitate C₂H₄ desorption from the catalyst to inhibit overoxidation and enhance separation of light-induced charges to boost the photocatalytic efficiency. Whilst the photogenerated holes on ZnO are captured by surface lattice oxygen to generate active O˙⁻ species, H atoms were extracted from adsorbed C₂H₆ to produce C₂H₄. In situ diffuse reflectance infrared Fourier transform spectroscopy is applied to detect the key intermediates and thus propose the possible catalytic EDH process over the Pt/ZnO photocatalyst.

中文翻译：

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ZnO负载Pt纳米粒子光催化乙烷脱氢高选择性合成乙烯

_{乙烷与O 2}的热催化氧化脱氢作为乙烯生产的一种方法已被广泛研究，但该方法是能源密集型的并且具有过度氧化、高成本和安全问题的缺点。在此，我们提出了 ZnO 支撑的 Pt 纳米颗粒，该纳米颗粒具有高活性和选择性，可通过光支持的 Mars-van Krevelen 机制在模拟阳光下将乙烷脱氢为乙烯。 Pt/ZnO催化剂实现了867.8 μmol h ^-1 g ^-1的乙烷至乙烯的高转化率和97.56%的优异选择性。此外，它还具有抗焦化作用，并且可以通过暴露于O ₂来补充消耗的晶格氧以保持其原始活性而容易地恢复。研究表明，Pt 物质促进 C ₂ H ₄从催化剂中解吸，抑制过氧化并增强光诱导电荷的分离，从而提高光催化效率。当ZnO上的光生空穴被表面晶格氧捕获以产生活性O˙ ^{-物种时，H原子从吸附的C} ₂ H ₆中被提取以产生C ₂ H ₄。应用原位漫反射红外傅里叶变换光谱来检测关键中间体，从而提出 Pt/ZnO 光催化剂上可能的催化 EDH 过程。