Issue 5, 2024

Ag/Pd bimetallic nanoparticle-loaded Zr-MOF: an efficacious visible-light-responsive photocatalyst for H2O2 and H2 production

Abstract

Photocatalytic production of H2O2 and H2 holds promise for conquering the impending energy crisis. In order to accomplish this goal, the photocatalysts must be robust and effective enough to harvest photons from a wide solar spectrum as well as having a high rate of exciton antirecombination. Low visible light absorption and fast recombination of exciton pairs are two major setbacks encountered in pristine MOF-based photocatalysts. Herein, the MOF UiO-66-NH2 modified with noble bimetallic nanoparticles (Ag/Pd) was synthesized via a facile adsorption–reduction technique and utilized for effective photocatalytic H2O2 and H2 production. The composite (1 : 2) Ag/Pd@UiO-66-NH2 displayed a H2O2 production rate of 39.4 μmol h−1 in an O2-saturated environment in the presence of IPA and water under visible light illumination, which is almost four-fold more than that of the pristine UiO-66-NH2 MOF and twofold greater than those of the monometallic counterparts (Ag@MOF or Pd@MOF). Moreover, the photocatalytic H2 evolution of the prepared materials was studied and a similar trend was observed in which the composite (1 : 2) Ag/Pd@UiO-66-NH2 showed the highest H2 evolution capacity of 448.2 μmol h−1. The enhanced photocatalytic performance of the Ag/Pd@MOF composite can be attributed to its ability to suppress exciton recombination, superior photon reception, and fast charge transfer. Mechanistically the transfer of photogenerated electrons from the UiO-66-NH2 surface to the bimetallic component was promoted through the LSPR effect of Ag and this is further enhanced by the Pd support. The electron-trapping capacity of the bimetallic nanoparticle (NP)-based co-catalyst enhances the overall reaction mechanism by giving highly surface active sites on the surface for the photocatalytic production of H2O2 and H2 as a sustainable means of green energy production.

Graphical abstract: Ag/Pd bimetallic nanoparticle-loaded Zr-MOF: an efficacious visible-light-responsive photocatalyst for H2O2 and H2 production

Supplementary files

Article information

Article type
Paper
Submitted
04 dez 2023
Accepted
30 mar 2024
First published
17 abr 2024
This article is Open Access
Creative Commons BY license

Energy Adv., 2024,3, 1073-1086

Ag/Pd bimetallic nanoparticle-loaded Zr-MOF: an efficacious visible-light-responsive photocatalyst for H2O2 and H2 production

S. Dash, S. P. Tripathy, S. Subudhi, L. Acharya, A. Ray, P. Behera and K. Parida, Energy Adv., 2024, 3, 1073 DOI: 10.1039/D3YA00597F

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