Direct probing of atomically dispersed Ru species over multi-edged TiO2for highly efficient photocatalytic hydrogen evolution

Huabin Zhang, Shouwei Zuo, Mei Qiu, Sibo Wang, Yongfan Zhang, Jing Zhang, Xiong Wen David Lou

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

A cocatalyst is necessary for boosting the electron-hole separation efficiency and accelerating the reaction kinetics of semiconductors. As a result, it is of critical importance to in situ track the structural evolution of the cocatalyst during the photocatalytic process, but it remains very challenging. Here, atomically dispersed Ru atoms are decorated over multi-edged TiO2 spheres for photocatalytic hydrogen evolution. Experimental results not only demonstrate that the photogenerated electrons can be effectively transferred to the isolated Ru atoms for hydrogen evolution but also imply that the TiO2 architecture with multi-edges might facilitate the charge separation and transport. The change in valence and the evolution of electronic structure of Ru sites are well probed during the photocatalytic process. Specifically, the optimized catalyst produces the hydrogen evolution rate of 7.2 mmol g-1 hour-1, which is much higher than that of Pt-based cocatalyst systems and among the highest reported values.
Original languageEnglish (US)
JournalScience Advances
Volume6
Issue number39
DOIs
StatePublished - Sep 1 2020
Externally publishedYes

Fingerprint

Dive into the research topics of 'Direct probing of atomically dispersed Ru species over multi-edged TiO2for highly efficient photocatalytic hydrogen evolution'. Together they form a unique fingerprint.

Cite this