https://scholars.lib.ntu.edu.tw/handle/123456789/641395
標題: | Promoting photocatalytic hydrogen evolution rates in layered graphitic carbon nitride through integrated non-noble CoB co-catalyst | 作者: | Gupta, Suraj Prapaitrakool, Chayathorn Bhagat, Brajesh Rajesh Yeh, Chun Lin Dashora, Alpa Sirisuk, Akawat Patel, Nainesh Daneu, Nina Kocjan, Andraž Spreitzer, Matjaž JEFFREY CHI-SHENG WU Kržmanc, Marjeta Maček |
關鍵字: | Graphitic carbon nitride | Hydrogen evolution reaction | Non-noble co-catalyst | Photocatalysis | Transition-metal boride | 公開日期: | 22-三月-2024 | 卷: | 60 | 來源出版物: | International Journal of Hydrogen Energy | 摘要: | Despite being one of the most widely studied metal-free semiconductors, graphitic carbon-nitride (gC3N4) shows meaningful photocatalytic activities only when loaded with noble-metal co-catalysts. The present work reports an alternative to noble metals in the form of cobalt boride (CoB) co-catalyst that can be easily integrated within the gC3N4 framework with facile fabrication strategies. The optimized CoB-gC3N4 composite showed ∼60 times higher hydrogen generation rate compared to bare gC3N4 nanosheets, with good stability. Detailed morphological, structural, chemical, electrochemical and spectroscopic investigations revealed the key aspects of CoB-gC3N4 composite that unanimously led to higher photocatalytic activity. Computational investigations not only corroborated the experimental results but also established that the surface Co and B sites in CoB provided the most energetically favoured sites for hydrogen evolution reaction. Based on the experimental and computational investigations, a generic reaction mechanism was formulated that will prove as a guiding light for future studies on similar photocatalytic systems. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/641395 | ISSN: | 03603199 | DOI: | 10.1016/j.ijhydene.2024.02.261 |
顯示於: | 化學工程學系 |
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