@article{Chen2022, 
author = {Longxin Chen and Ting Liu and Duobin Chao},
title = {An electrochromic coordination nanosheet for robust CO2 photoreduction via ligand-based electron transfer},
year = {2022},
journal = {Nano Research},
volume = {15},
number = {7},
pages = {5902-5911},
keywords = {photocatalysis, CO2 reduction, electron transfer, coordination nanosheet, electrochromism},
url = {https://www.sciopen.com/article/10.1007/s12274-022-4245-2},
doi = {10.1007/s12274-022-4245-2},
abstract = {A coordination nanosheet composed of [Fe(tpy)2]2+ (tpy = 2,2':6',2''-terpyridine) units, showing reversible electrochromism at the ligand-based cathodic potential, has been prepared through a liquid/liquid interfacial synthesis. The noble metal-free nanosheet exhibited a CO evolution rate of 114.3 mmol·g−1·h−1 with the selectivity up to 99.3% under visible light irradiation in the presence of water, which is in the front rank of heterogeneous catalysis for CO2 photoreduction. Such robust photocatalytic performance is due to efficient ligand-based electron transfer through long-lived π radical anion tpy·− with a lifetime more than 25 min, as evidenced by in situ electron paramagnetic resonance (EPR) and ultraviolet–visible–near infrared (UV–vis–NIR) spectroscopy studies. Fe(II) cation in [Fe(tpy)2]2+ mainly contributes to enhancing reduction potentials of ligand and stabilizing π radical anion tpy·−. This ligand-based electron transfer with the aid of metal cation represents a promising strategy for selective CO2 photoreduction, especially towards gaining CO from CO2.}
}