Optimization of the Composition of PdAuCu Ternary Alloy Nanoparticles for Plasmonic Hydrogen Sensing,ACS Applied Nano Materials

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Optimization of the Composition of PdAuCu Ternary Alloy Nanoparticles for Plasmonic Hydrogen Sensing
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2021-08-27 , DOI: 10.1021/acsanm.1c01242
Iwan Darmadi ₁ , Sarah Zulfa Khairunnisa ₁ , David Tomeček ₁ , Christoph Langhammer ₁

Affiliation

Alloying is a long-standing central strategy in materials science for the tailoring and optimization of bulk material properties, which more recently has started to find application also in engineered nanomaterials and nanostructures used in, among other, nanoplasmonic hydrogen sensors. Specifically, alloying Pd nanoparticles to form binaries and ternaries with the coinage metals Au and Cu has proven efficient to mitigate hysteresis in the sensor response, improve response and recovery times, boost sensitivity in the low hydrogen concentration sensing range, and reduce the detrimental impact of carbon monoxide poisoning. However, when surveying the corresponding studies, it is clear that there is a trade-off between the sensitivity enhancement and the CO-poisoning resistance effects provided by Au and Cu alloyants, respectively. Therefore, in this work, we systematically screen the impact of the Au and Cu concentration in PdAuCu ternary alloy nanoparticles used for plasmonic hydrogen sensing, to obtain a champion system with maximized sensitivity and CO-poisoning resistance based on an evaluation using the stringent ISO 26142 test protocol. As the main results, we find that the best hysteresis-free and sensitive response combined with deactivation resistance to 500 ppm CO in synthetic air is obtained for the Pd₆₅Au₂₅Cu₁₀ ternary alloy system, which also exhibits good long-term stability during operation under severe CO poisoning conditions.

中文翻译：

用于等离子体氢传感的 PdAuCu 三元合金纳米粒子的成分优化

合金化是材料科学中用于定制和优化大块材料特性的长期核心战略，最近也开始在工程纳米材料和纳米结构中找到应用，其中包括纳米等离子体氢传感器。具体而言，将 Pd 纳米粒子与铸币金属 Au 和 Cu 形成二元和三元合金已被证明可以有效减轻传感器响应中的滞后，改善响应和恢复时间，提高低氢浓度传感范围的灵敏度，并减少对传感器的不利影响。一氧化碳中毒。然而，在调查相应的研究时，很明显，金和铜合金分别提供的灵敏度增强和抗 CO 中毒效果之间存在权衡。所以，在这项工作中，我们系统地筛选了用于等离子体氢传感的 PdAuCu 三元合金纳米粒子中 Au 和 Cu 浓度的影响，以基于使用严格的 ISO 26142 测试协议的评估获得具有最大灵敏度和 CO 中毒抗性的冠军系统. 作为主要结果，我们发现 Pd 获得了最佳的无滞后和灵敏响应以及对合成空气中 500 ppm CO 的失活抵抗力₆₅ Au ₂₅ Cu ₁₀三元合金体系，在严重的CO中毒条件下运行时也表现出良好的长期稳定性。

更新日期：2021-09-24

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