Nitrogen-doped carbon microfibers decorated with palladium and palladium oxide nanoparticles for high-concentration hydrogen sensing

被引:4
作者
Li, Zhenxu [1 ]
Xing, Xiaxia [1 ]
Feng, Dongliang [1 ]
Du, Lingling [1 ]
Tian, Yingying [1 ]
Chen, Xiaoyu [1 ]
Yang, Dachi [1 ]
机构
[1] Nankai Univ, Coll Elect Informat & Opt Engn, Tianjin Key Lab Optoelect Sensor & Sensing Network, Tianjin 300350, Peoples R China
基金
中国国家自然科学基金;
关键词
Nitrogen-doped carbon microfibers; Palladium/palladium oxide nanoparticles; High-concentration; Hydrogen sensing; Room temperature; SENSOR; PERFORMANCE; HYBRID;
D O I
10.1016/j.ceramint.2024.03.265
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Hydrogen (H2) sensing materials with tuned geometrical shapes and dopants may contribute to H2 sensing performance, however, their synthetic approaches need further exploring. Here, shape -controlled nitrogen -doped carbon microfibers decorated with palladium and palladium oxide nanoparticles (Pd/PdO NPs@C/N MFs) have been prepared by combined electrospinning, annealing and chemical deposition. Typically, the C/N MFs of -224 nm in diameter are observed with amorphous crystallization, around which the Pd/PdO NPs (-20 nm in diameter) are randomly decorated. Beneficially, Pd/PdO NPs@C/N MFs present high -concentration sensing toward 0.01-30 v/v% H2 at room temperature. Theoretically, the nitrogen dopants in PVP contribute to anchoring the growth of Pd/PdO NPs, leading to stable decoration on the surface of MFs. The excellent sensing performance might be interpreted as the synergistic effect that Pd/PdO NPs@C/N MFs expose more adsorption sites, Pd adsorbs H2 to form PdHx intermediates, PdO alters the electronic state of Pd to assist the adsorption of H2, and C/N MFs serve as the support and boost the electron transfer. Practically, the simulation utilizing Pd/ PdO NPs@C/N MFs to detect H2 leakage has been conducted with reliable sensing.
引用
收藏
页码:21519 / 21525
页数:7
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