Cobalt Phosphate Cocatalyst Loaded-CdS Nanorod Photoanode with Well-Defined Junctions for Highly Efficient Photoelectrochemical Water Splitting.

Impact Factor:

3.186

DOI number:

10.1007/s10562-019-03084-z

Journal:

Catalysis Letters

Key Words:

Cobalt phosphate, Cocatalyst, Photoelectrochemical, Water splitting, CdS

Abstract:

ocatalysts play important roles in photocatalytic and photoelectrochemical water splitting reactions. However, the forma_x0002_tion of well-defned junctions between low dimensional semiconductors and cocatalysts is still challenging. In this study, CdS nanorod photoanodes loaded with cobalt phosphate (CoPi) cocatalyst were synthesized by a facile two-step route, in which CdS nanorods were prepared using a hydrothermal method followed by photo-assisted electrodeposition of CoPi. It was found that the formation of intimate junctions between CoPi and CdS nanorods in the form of Co–S bonding efectively facilitated the charge separation and lowered the activation energy of the water oxidation reaction. This resulted in highly efcient and stable photoelectrochemical water splitting on the CdS photoanode. The optimal CdS/CoPi photoanode showed a maximum photocurrent of 4.7 mA/cm2 at 0 V versus reversible hydrogen electrode under an AM 1.5 G solar simulator, which was 5.5-fold higher than that of bare CdS photoanode. This work expands the potential application of the cocatalyst CoPi in CdS photoanode systems and improves our understanding of the nature of cocatalysts with well-defned interface junctions in semiconductors.

Co-author:

Xiaodi Zhu, Yusheng Zeng, Azhu Wang, Yi Fan, Mengdie Cai, Qin Cheng, Yuxuewei

First Author:

Zhiming Song

Correspondence Author:

Shikuo Li, Song Sun

Volume:

150

Issue:

7

Page Number:

1878-1889

Translation or Not:

no

Date of Publication:

2020-01-17

Links to published journals:

https://link.springer.com/article/10.1007%2Fs10562-019-03084-z