Plasmonic Pd Nanoparticle- and Plasmonic Pd Nanorod-Decorated BiVO4 Electrodes with Enhanced Photoelectrochemical Water Splitting Efficiency Across Visible-NIR Region

Weiwei Yang; Yunjie Xiong; Liangliang Zou; Zhiqing Zou; Dongdong Li; Qixi Mi; Yanshan Wang; Hui Yang

doi:10.1186/s11671-016-1492-8

Plasmonic Pd Nanoparticle- and Plasmonic Pd Nanorod-Decorated BiVO4 Electrodes with Enhanced Photoelectrochemical Water Splitting Efficiency Across Visible-NIR Region

Nanoscale Res Lett. 2016 Dec;11(1):283. doi: 10.1186/s11671-016-1492-8. Epub 2016 Jun 4.

Authors

Weiwei Yang^{1

2

3}, Yunjie Xiong^{1

2

3}, Liangliang Zou¹, Zhiqing Zou⁴, Dongdong Li¹, Qixi Mi³, Yanshan Wang¹, Hui Yang^{5

6}

Affiliations

¹ Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China.
² University of Chinese Academy of Sciences, Beijing, 100039, China.
³ School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.
⁴ Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China. zouzq@sari.ac.cn.
⁵ Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, China. yangh@sari.ac.cn.
⁶ University of Chinese Academy of Sciences, Beijing, 100039, China. yangh@sari.ac.cn.

Abstract

The photoelectrochemical (PEC) water splitting performance of BiVO4 is partially hindered by insufficient photoresponse in the spectral region with energy below the band gap. Here, we demonstrate that the PEC water splitting efficiency of BiVO4 electrodes can be effectively enhanced by decorating Pd nanoparticles (NPs) and nanorods (NRs). The results indicate that the Pd NPs and NRs with different surface plasmon resonance (SPR) features delivered an enhanced PEC water splitting performance in the visible and near-infrared (NIR) regions, respectively. Considering that there is barely no absorption overlap between Pd nanostructures and BiVO4 and the finite-difference time domain (FDTD) simulation indicating there are substantial energetic hot electrons in the vicinity of Pd nanostructures, the enhanced PEC performance of Pd NP-decorated BiVO4 and Pd NR-decorated BiVO4 could both benefit from the hot electron injection mechanism instead of the plasmon resonance energy transfer process. Moreover, a combination of Pd NPs and NRs decorated on the BiVO4 electrodes leads to a broad-band enhancement across visible-NIR region.

Keywords: BiVO4; Photoelectrochemical water splitting; Plasmonic Pd; Surface plasmon resonance.