A strategy to construct a highly active CoxP/SrTiO3(Al) catalyst to boost the photocatalytic overall water splitting reactions. Issue 6 (31st January 2022)

• Record Type: Journal Article
• Authors: Lv, Shangchun; Pei, Mengxi; Liu, Yuxiang; Si, Zhichun; Wu, Xiaodong; Ran, Rui; Weng, Duan; Kang, Feiyu
• Is Part Of: Nanoscale. Volume 14:Issue 6(2022)
• Page Start: 2427
• Page End: 2433
• Publication Date: 2022-01-31
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d1nr07398b
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Here, we demonstrate a strategy to construct highly active Co x P/SrTiO3 (Al) for overall water splitting. The as-prepared Co x P/SrTiO3 (Al) photocatalyst shows a stable HER rate of 1.36 mmol −1 h −1 and OER rate of 0.635 mmol −1 h −1 . Abstract : Hydrogen production from overall water splitting using SrTiO3 (Al)-based semiconductors is one of the most promising routes to address energy and environmental concerns. Noble metals are needed to accelerate water splitting by promoting the charge transfer and providing active sites. However, noble metal-based catalysts have high prices and rare resources. Herein, we demonstrate a strategy to construct highly active Co x P/SrTiO3 (Al) for overall water splitting. Hydrothermal method followed by an ultrasonic process was applied to prepare Co x P dots, which were loaded on the whole surface of SrTiO3 (Al) as bifunctional cocatalysts. Interestingly, the Co x P dots on the (110) planes of SrTiO3 (Al) were partially oxidized for the OER reaction. However, Co x P dots on the (100) planes of SrTiO3 (Al) for HER kept it as it was. The as-prepared Co x P/SrTiO3 (Al) photocatalyst shows a stable HER rate of 1.36 mmol −1 h −1 and OER rate of 0.635 mmol −1 h −1 . The strong interaction between Co x P and SrTiO3 (Al) not only facilitates rapid charge separation but also provides a highly active site for overall water splitting. Our study provides a valuable method for constructing noble-metal-free SrTiO3 (Al)-based photocatalysts.