Chlorophyll derivatives/MXene hybrids for photocatalytic hydrogen evolution: Dependence of performance on the central coordinating metals
Journal
International Journal of Hydrogen Energy
Journal Volume
47
Journal Issue
6
Pages
3824-3833
Date Issued
2022
Author(s)
Abstract
Development of efficient photocatalytic hydrogen evolution reaction (HER) with illumination of visible light is challenging. In this work, five chlorophyll derivatives (M-Chls; M = H2/Cu/Ni/Co/Zn) with different central ions in its cyclic tetrapyrrole ring including free base, copper, nickel, cobalt, and zinc were synthesized and employed as the effective visible-light harvester for efficient HER. In addition, two-dimensional (2D) noble metal-free co-catalyst Ti3C2Tx MXene was used as an excellent electron capturer due to its outstanding conductivity property. These M-Chls are modified on the surface of Ti3C2Tx MXene with 2D accordion-like morphology by means of a simple deposition process to form noble metal-free Chl/Ti3C2Tx-based photocatalysts for HER. It is found that the best HER performance as high as 49 μmol/h/gcat was achieved with the Co-Chl@Ti3C2Tx hybrid, which was much higher than those of other M-Chl@Ti3C2Tx composites. This research provides a specific way to synthesize low-cost and environmentally friendly natural Chls for developing highly efficient photocatalytic HER through molecular engineering. ? 2021 Hydrogen Energy Publications LLC
Subjects
Aggregates materials
Central metals ion
Chlorophyll derivatives
Hydrogen evolution reaction
Ti3C2Tx MXene
Chlorophyll
Cost engineering
Heavy metals
Hydrogen
Light
Photocatalytic activity
Precious metals
Aggregate materials
Central metal ion
Central metals
Chlorophyll derivative
Hydrogen evolution reactions
Metal free
Metals ions
Photocatalytic hydrogen evolution
Ti3C2Tx mxene
Visible light
Morphology
Type
journal article