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Flexible and Extensive Platinum Ion Gel Condensers for Programmable Catalysis
ACS Nano ( IF 15.8 ) Pub Date : 2023-12-26 , DOI: 10.1021/acsnano.3c09815 Tzia Ming Onn 1, 2 , Kyung-Ryul Oh 1, 2 , Demetra Z Adrahtas 2 , Jimmy K Soeherman 2 , Justin A Hopkins 1, 2 , C Daniel Frisbie 1, 2 , Paul J Dauenhauer 1, 2
ACS Nano ( IF 15.8 ) Pub Date : 2023-12-26 , DOI: 10.1021/acsnano.3c09815 Tzia Ming Onn 1, 2 , Kyung-Ryul Oh 1, 2 , Demetra Z Adrahtas 2 , Jimmy K Soeherman 2 , Justin A Hopkins 1, 2 , C Daniel Frisbie 1, 2 , Paul J Dauenhauer 1, 2
Affiliation
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Catalytic condensers composed of ion gels separating a metal electrode from a platinum-on-carbon active layer were fabricated and characterized to achieve more powerful, high surface area dynamic heterogeneous catalyst surfaces. Ion gels comprised of poly(vinylidene difluoride)/1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide were spin coated as a 3.8 μm film on a Au surface, after which carbon sputtering of a 1.8 nm carbon film and electron-beam evaporation of 2 nm Pt clusters created an active surface exposed to reactant gases. Electronic characterization indicated that most charge condensed within the Pt nanoclusters upon application of a potential bias, with the condenser device achieving a capacitance of ∼20 μF/cm2 at applied frequencies of up to 120 Hz. The maximum charge of ∼1014 |e–| cm–2 was condensed under stable device conditions at 200 °C on catalytic films with ∼1015 sites cm–2. Grazing incidence infrared spectroscopy measured carbon monoxide adsorption isobars, indicating a change in the CO* binding energy of ∼19 kJ mol–1 over an applied potential bias of only 1.25 V. Condensers were also fabricated on flexible, large area Kapton substrates allowing stacked or tubular form factors that facilitate high volumetric active site densities, ultimately enabling a fast and powerful catalytic condenser that can be fabricated for programmable catalysis applications.
中文翻译：
用于可编程催化的灵活且广泛的铂离子凝胶冷凝器
由离子凝胶组成的催化冷凝器将金属电极与碳上铂活性层分开，并对其进行了表征，以实现更强大、高表面积的动态多相催化剂表面。将由聚偏二氟乙烯/1-乙基-3-甲基咪唑鎓双(三氟甲基磺酰基)亚胺组成的离子凝胶旋涂在Au表面上形成3.8μm的薄膜，然后通过碳溅射形成1.8nm的碳薄膜并进行电子束蒸发2 nm 的 Pt 簇形成了暴露于反应气体的活性表面。电子表征表明，在施加电位偏压时，大多数电荷在 Pt 纳米团簇内凝聚，电容器装置在高达 120 Hz 的施加频率下实现~20 μF/cm 2的电容。最大电荷~10 14 |e – | cm –2在200 °C 的稳定设备条件下凝结在具有∼10 15 个位点cm –2的催化膜上。掠入射红外光谱测量了一氧化碳吸附等压线，表明在仅 1.25 V 的外加电位偏压下，CO* 结合能变化约 19 kJ mol –1 。冷凝器也是在柔性、大面积 Kapton 基板上制造的，允许堆叠或管状形状因素有利于高体积活性位点密度，最终实现快速、强大的催化冷凝器，可用于可编程催化应用。
更新日期：2023-12-26
中文翻译：
用于可编程催化的灵活且广泛的铂离子凝胶冷凝器
由离子凝胶组成的催化冷凝器将金属电极与碳上铂活性层分开，并对其进行了表征，以实现更强大、高表面积的动态多相催化剂表面。将由聚偏二氟乙烯/1-乙基-3-甲基咪唑鎓双(三氟甲基磺酰基)亚胺组成的离子凝胶旋涂在Au表面上形成3.8μm的薄膜，然后通过碳溅射形成1.8nm的碳薄膜并进行电子束蒸发2 nm 的 Pt 簇形成了暴露于反应气体的活性表面。电子表征表明，在施加电位偏压时，大多数电荷在 Pt 纳米团簇内凝聚，电容器装置在高达 120 Hz 的施加频率下实现~20 μF/cm 2的电容。最大电荷~10 14 |e – | cm –2在200 °C 的稳定设备条件下凝结在具有∼10 15 个位点cm –2的催化膜上。掠入射红外光谱测量了一氧化碳吸附等压线，表明在仅 1.25 V 的外加电位偏压下，CO* 结合能变化约 19 kJ mol –1 。冷凝器也是在柔性、大面积 Kapton 基板上制造的，允许堆叠或管状形状因素有利于高体积活性位点密度，最终实现快速、强大的催化冷凝器，可用于可编程催化应用。
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