Issue 21, 2024

Bioinspired electron carrier mediated transmembrane photocatalytic hydrogen evolution in silica colloidosomes

Abstract

Inspired by the ordered processes of chloroplasts in photosynthesis involving coordinative linkages and efficient compartmentalization, a bioinspired compartmentalized photocatalytic system (BCPS) with an inorganic compartment is designed for photocatalytic hydrogen evolution with light driven electron carrier mediated cross-membrane energy transport. A typical BCPS comprises silica colloidosomes containing co-catalysts as microreactors, where positively charged N-methyl-4-cyanopyridinium (MCP+) serves as the electron carrier. The MCP+ molecules harvest energy from photoexcited g-C3N4, and transit to electrically neutral species MCP0, which can pass the colloidosome. Driven by light, the MCP0 diffuse across the membrane and transport electrons to H+ for hydrogen evolution, in which Pt particles are employed as co-catalysts. Analogous to natural photosynthesis, hydrogen evolution occurs within compartments, separating light and dark reactions, protecting the dark reaction from interference during light harvesting and minimizing potential side effects. The system enables sustained evolution of hydrogen with a higher yield than that with the control catalysis in a bulk catalyst suspension. The dramatic influence of SDS on the hydrogen evolution was revealed, and a possible mechanism of electron carrier amount buffering was proposed.

Graphical abstract: Bioinspired electron carrier mediated transmembrane photocatalytic hydrogen evolution in silica colloidosomes

Supplementary files

Article information

Article type
Research Article
Submitted
08 aug 2024
Accepted
18 sep 2024
First published
19 sep 2024

Inorg. Chem. Front., 2024,11, 7416-7425

Bioinspired electron carrier mediated transmembrane photocatalytic hydrogen evolution in silica colloidosomes

C. Bai, B. Wang, Z. Jiang, C. Lv, Z. Liu, S. Wang, S. Liang and H. Zang, Inorg. Chem. Front., 2024, 11, 7416 DOI: 10.1039/D4QI02015D

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