An in situ derived MOF@In 2 S 3 heterojunction stabilizes Co( ii )-salicylaldimine for efficient photocatalytic formic acid dehydrogenation

• Published in: Chemical communications (Cambridge, England) Vol. 58; no. 51; pp. 7140 - 7143
• Main Authors: Zhang, Meijin, Lin, Wenting, Ma, Liang, Pi, Yunhong, Wang, Tiejun
• Format: Journal Article
• Language: English
• Published: England 23.06.2022
• ISSN: 1359-7345; 1364-548X
• DOI: 10.1039/D2CC01969H

We report here the hierarchical construction of a molecular Co( ii )-salicylaldimine catalyst and an in situ derived In 2 S 3 semiconductor in a MOF@In 2 S 3 heterojunction through sequentially controllable in situ etching and post-synthetic modification for photocatalytic hydrogen production from formic acid. The enhanced catalyst stability and facilitated charge carrier mobility between the In 2 S 3 photosensitizers and Co catalyst realize a superior H 2 production rate of 18 746 μmol g −1 h −1 (selectivity > 99.9%) with a turnover number (TON) of up to 6146 in 24 h (apparent quantum efficiency of 3.8% at 420 nm), indicating a 165-fold enhancement over that of the pristine MOF. This work highlights a powerful strategy for synergistic Earth-abundant metal-based MOF photocatalysis in promoting H 2 production from FA.