Issue 24, 2023

Boosted charge transfer in Pt cluster anchored TiO2 microspheres with rich oxygen vacancies for solar driven H2 production from lignocellulosic biomass

Abstract

Solar driven lignocellulosic biomass-to-H2 conversion through photocatalysis is an economical and clean approach to generate hydrogen fuel. However, the photocatalytic lignocellulosic biomass-to-H2 conversion efficiency is still very low owing to the lack of a highly reactive photocatalyst. Herein, we reported the construction of Pt nanocluster chemically anchored porous TiO2 microspheres with abundant oxygen vacancies as a highly efficient photocatalyst for solar driven lignocellulosic biomass-to-H2 conversion. The oxygen vacancies on the TiO2 surface not only boost electron transfer across the Pt–TiO2 interface, but also benefit the formation of ˙OH which acts as a key intermediate for the oxidation of lignocellulose. The Pt/TiO2 photocatalysts show high photocatalytic performance with the highest H2 generation rate of 494 μmol g−1 h−1 and an apparent quantum yield of 3.21% at 380 nm in α-cellulose aqueous solution. Furthermore, photocatalytic H2 production from lignocellulosic biomass has been successfully achieved, and the H2 generation rate of the optimal Pt/TiO2 photocatalyst in rice straw, wheat straw, polar wood chip, bamboo, rice hull and corncob aqueous solution was 2, 3, 23, 32, 11 and 6 μmol g−1 h−1, respectively. This study provides an opportunity for encouraging more research on solar driven lignocellulosic biomass-to-H2 conversion.

Graphical abstract: Boosted charge transfer in Pt cluster anchored TiO2 microspheres with rich oxygen vacancies for solar driven H2 production from lignocellulosic biomass

Supplementary files

Article information

Article type
Research Article
Submitted
19 Sept. 2023
Accepted
28 Okt. 2023
First published
31 Okt. 2023

Inorg. Chem. Front., 2023,10, 7369-7380

Boosted charge transfer in Pt cluster anchored TiO2 microspheres with rich oxygen vacancies for solar driven H2 production from lignocellulosic biomass

F. Zhang, M. Cheng, Y. Yuan, Q. Liu, Q. Cheng and J. Guan, Inorg. Chem. Front., 2023, 10, 7369 DOI: 10.1039/D3QI01894F

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