Issue 7, 2024

Co-catalyst design to control charge transfer and product composition for photocatalytic H2 production and biomass reforming

Abstract

The exploration of co-catalyst effects in photocatalytic H2 production along with biomass reforming is still limited. This study employs S- and N-doped graphene oxide dots (SNGODs) along with Pt and Ag co-catalysts to investigate the photocatalytic reforming of xylose (C5) into its derivatives and gaseous H2. Our study shows that Pt-SNGODs effectively catalyze both the reduction and oxidation steps: water reduction for H2 evolution and oxidative reforming of xylose into C5–C1 species through successive alternation of hydrolysis and photocatalytic oxidation. Ag-SNGODs are less effective in the H2 evolution reaction and the accumulated photogenerated electrons facilitate cleavage of xylose, through the retro-aldol reaction, into C3- and C2-species, which are then reformed into C3–C1 species. In addition to xylose cleavage, Ag-SNGODs are effective in reducing xylose and formate into radicals, which would proceed with C–C coupling to produce a C6 compound. The present study demonstrates how the co-catalyst of photocatalysts can influence the charge transfer dynamics and the product composition in photocatalytic biomass reforming.

Graphical abstract: Co-catalyst design to control charge transfer and product composition for photocatalytic H2 production and biomass reforming

Supplementary files

Article information

Article type
Paper
Submitted
29 nov 2023
Accepted
01 feb 2024
First published
03 feb 2024
This article is Open Access
Creative Commons BY-NC license

Sustainable Energy Fuels, 2024,8, 1412-1423

Co-catalyst design to control charge transfer and product composition for photocatalytic H2 production and biomass reforming

V. Nguyen, M. Sanoe, N. P. Putri, Y. Lee and H. Teng, Sustainable Energy Fuels, 2024, 8, 1412 DOI: 10.1039/D3SE01544K

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