Mandal, Indrajeet and Gangareddy, Jagannath and Sethurajaperumal, Abimannan and NK, Murugasenapathi and Majji, Manikanta and Bera, Susmita and Rudra, Pratyasha and Ravichandran, Vanmathi and Bysakh, Sandip and Jacob, Noah and Rao, K. D. M. and Singh, Rajiv K. and Krishnan, N. M. Anoop and Chirumami, Manohar and Palanisamy, Tamilarasan and M. , Motapothula and Varrla, Eswaraiah and Ghosh, Srabanti and Allu, Amarnath R. (2024) H-Glass Supported Hybrid Gold Nano-Islands for Visible-Light-Driven Hydrogen Evolution. Small, 20 (27). ISSN 16136810

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Abstract

Flat panel reactors, coated with photocatalytic materials, offer a sustainable approach for the commercial production of hydrogen (H2) with zero carbon footprint. Despite this, achieving high solar-to-hydrogen (STH) conversion efficiency with these reactors is still a significant challenge due to the low utilization efficiency of solar light and rapid charge recombination. Herein, hybrid gold nano-islands (HGNIs) are developed on transparent glass support to improve the STH efficiency. Plasmonic HGNIs are grown on an in-house developed active glass sheet composed of sodium aluminum phosphosilicate oxide glass (H-glass) using the thermal dewetting method at 550 °C under an ambient atmosphere. HGNIs with various oxidation states (Au0, Au+, and Au−) and multiple interfaces are obtained due to the diffusion of the elements from the glass structure, which also facilitates the lifetime of the hot electron to be ≈2.94 ps. H-glass-supported HGNIs demonstrate significant STH conversion efficiency of 0.6%, without any sacrificial agents, via water dissociation. This study unveils the specific role of H-glass-supported HGNIs in facilitating light-driven chemical conversions, offering new avenues for the development of high-performance photocatalysts in various chemical conversion reactions for large-scale commercial applications.

Item Type:	Article
Subjects:	Engineering Materials
Divisions:	Fuel Cell and Battery
Depositing User:	Ms Upasana Sahu
Date Deposited:	01 Sep 2025 11:03
Last Modified:	01 Sep 2025 11:03
URI:	http://cgcri.csircentral.net/id/eprint/5771

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