Boosting room temperature response of Pd-based hydrogen sensor by constructing in situ nanoparticles
Boosting room temperature response of Pd-based hydrogen sensor by constructing in situ nanoparticles
复制标题
通过构建原位纳米粒子提高钯基氢传感器的室温响应
DOI：
10.1016/j.physe.2022.115464
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发表时间：
2022-08
影响因子：
3.3
通讯作者：
Yan Shi
中科院分区：
文献类型：
--
作者：
Jie Li;Guang-Kun Ren;Yu Tian;Fengyun Ding;Yinke Liu;Linsen Zhou;Wen Fang;Jun Chen;Xiaohong Chen;Jiangfeng Song;Yan Shi
钯基氢气传感器由于对氢气的高选择性而受到越来越多的关注，但氢脆和响应速度慢等明显的局限性阻碍了其进一步的发展。为了解决这些问题，加入其他金属形成Pd基合金和优化表面结构被广泛认为是有效的方法。本工作采用磁控共溅射技术制备了具有合适元素比例的Pd/Ti合金薄膜，并通过原位纳米结构进一步调节了Pd/Ti合金薄膜的传感特性。对于原子比为74.1/2 5.9的Pd/Ti薄膜，氢气响应值的表征表明，室温下的探测下限(LOD)为5 0ppm，在2 Vt.%H2浓度下的响应时间为61.3 S。基于第一性原理计算，Pd和Pd/Ti合金氢扩散过程的影响可以忽略不计，但表面特殊的纳米结构成为提高响应性能的主要原因。更重要的是，形成合适的原位纳米颗粒的方法对于低功耗的钯传感器的氢检测的广泛和快速响应具有重要的指导意义。·采用磁控溅射法制备了含纳米颗粒的Pd/Ti合金薄膜。·样品在室温下对50ppm-4Vt.%H2浓度有响应。·纳米颗粒可以吸附H2分子，并促进其分解为H原子。·第一性原理计算结果证实了纳米粒子的优化效果。
Palladium-based H 2 sensors have attracted increased attention due to the high selectivity for H 2 , yet evident limitations like hydrogen embrittlement and slow response rates, have impeded the further development. Aiming to address these issues, adding other metals to form Pd-based alloys and optimize coincided surface structure, are widely considered as effective approaches. Here in this work, Pd/Ti alloy films with proper elemental ratios were prepared by using a magnetron co-sputtering technique, and the coincided sensing features have been further regulated by in situ nanostructuring. For the Pd/Ti film with an atomic ratio of 74.1/25.9, the H 2 response values characterizations revealed that the limit of detection (LoD) could be 50 ppm at room temperature, combined with a response time of 61.3 s at 2 vt.% H 2 concentration. Based on the first-principles calculations, the effects from hydrogen diffusion process of Pd and Pd/Ti alloys have been evaluated to be ignorable, however, the specific nanostructures constructed on the surface then become the main reason for the boosted response performance. More importantly, the approach of forming proper in situ nanoparticles has been identified as a significant guidance, for extensive and rapid response of H 2 detection of Pd-based sensors used upon low power consumption. • Pd/Ti alloy films with nanoparticles are prepared by magnetron sputtering. • Samples have response to 50 ppm - 4 vt.% H 2 concentration at room temperature. • Nanoparticles can absorb H 2 molecules and facilitate their decomposition into H atoms. • The results of the first-principles calculations confirmed the optimization effect of nanoparticles.
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影响因子：
8.4
作者：
Wang, Min;Feng, Ying
通讯作者：
Feng, Ying
影响因子：
3.7
作者：
E. H. Megchiche;S. Pérusin;J. Barthelat;C. Mijoule
通讯作者：
E. H. Megchiche;S. Pérusin;J. Barthelat;C. Mijoule
影响因子：
4.6
作者：
Jin-Ho Yoon;Bum-Joon Kim;Jung-Sik Kim
通讯作者：
Jin-Ho Yoon;Bum-Joon Kim;Jung-Sik Kim
影响因子：
3.7
作者：
Kresse, G;Furthmuller, J
通讯作者：
Furthmuller, J
影响因子：
8.4
作者：
J. Dai;Minghong Yang;Z. Yang;Zhi Li;Yao Wang;Gaopeng Wang;Yi Zhang;Z. Zhuang
通讯作者：
J. Dai;Minghong Yang;Z. Yang;Zhi Li;Yao Wang;Gaopeng Wang;Yi Zhang;Z. Zhuang