Photocatalytic Hydrogen Generation from a Visible-Light Responsive Metal-Organic Framework System: The Impact of Nickel Phosphide Nanoparticles

S. Kampouri, T. N. Nguyen, C. Ireland, B. Valizadeh, F. Ebrahim, G. Capano, D. Ongari, M. Mace, N. Guijarro, K. Sivula, A. Sienkiewicz, L. Forro, B. Smit, and K. Stylianou, Photocatalytic Hydrogen Generation from a Visible-Light Responsive Metal-Organic Framework System: The Impact of Nickel Phosphide Nanoparticles J Mater Chem A  6 (6), 2476 (2018) http://dx.doi.org/10.1039/C7TA10225A

Abstract: Herein, we report the performance of a photocatalytic system based on the visible-light active MIL-125-NH2 mixed with nickel phosphide (Ni2P) nanoparticles. This combination boosts the H2 evolution rate to an outstanding value of 894 µmol h-1 g-1 under visible-light irradiation, which is among the highest H2 evolution rates reported to date for metal-organic frameworks (MOFs). The H2 generation rate produced by Ni2P/MIL-125-NH2 is almost 3 times higher than that of Pt/MIL-125-NH2 system, highlighting the impact of the co-catalyst in photocatalytic water splitting. Additionally, our system outperforms the Ni2P/TiO2 system under UV-Vis irradiation. The exceptional performance of Ni2P/MIL-125-NH2 is due to the efficient transfer of photogenerated electrons from MIL-125-NH2 to Ni2P, high intrinsic activity of Ni2P and exceptional synergy between them. This system exhibits the highest apparent quantum yields of 27.0 and 6.6 % at 400 and 450 nm, respectively, ever reported for MOFs.

© Berend Smit 2019