纳米复合材料
材料科学
氧化物
光催化
透射电子显微镜
化学物理
化学工程
纳米技术
复合材料
催化作用
化学
生物化学
工程类
冶金
作者
Ping Yun Wu,Kim Tuyen Le,Hsun‐Yen Lin,Yu‐Ching Chen,Po-Han Wu,Jyh Ming Wu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-08-15
卷期号:17 (17): 17417-17426
被引量:12
标识
DOI:10.1021/acsnano.3c05478
摘要
A high-entropy oxide nanocomposite with Ag(CuZn)(AlCr)2O4 and CuO phases is fabricated to form an abundantly hierarchical wrinkled surface. Application of a mechanical force to the nanocomposite resulted in a nonhomogeneous strain gradient at the interface between the Ag(CuZn)(AlCr)2O4 and CuO phases, changing the local charge distribution and creating flexoelectric polarization that delayed electron/hole recombination. Transmission electron microscopy energy-dispersive X-ray spectroscopy mapping revealed that the Ag, Cu, Zn, Al, Cr, and O elements were highly distributed throughout the nanocomposite. The nanocomposite produced 2116 μmol·g-1 h-1 of H2 without external light irradiation, which is 980% higher than the H2 produced by the same nanocomposite under the photocatalytic process. A strong electrical field is observed at the interface between the Ag(CuZn)(AlCr)2O4 and CuO phases, demonstrating that a flexoelectric potential (flexopotential) is established at the structural boundaries because the strain gradient is localized at these interfaces. The nanocomposite is a promising approach for environmentally friendly energy production.
科研通智能强力驱动
Strongly Powered by AbleSci AI