A review of hydrogen production processes by photocatalytic water splitting – From atomistic catalysis design to optimal reactor engineering |
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Affiliation: | 1. Department of Mechanical Engineering, GLA University, Mathura, Uttar Pradesh, 281406, India;2. School of Physics and Materials Science, Thapar Institute of Engineering and Technology, Patiala Punjab, 147004, India;3. Department of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, 1001, Ljubljana, Slovenia;4. Applied Materials India Private Limited, Bangalore, Karnataka, 560066, India;5. Department of Mechanical Engineering, Indian Institute of Science, Bangalore, Karnataka, 560012, India |
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Abstract: | ‘Renewable energy is an essential part of our strategy of decarbonization, decentralization, as well as digitalization of energy.’ – Isabelle Kocher.Current climate, health and economic condition of our globe demands the use of renewable energy and the development of novel materials for the efficient generation, storage and transportation of renewable energy. Hydrogen has been recognised as one of the most prominent carriers and green energy source with challenging storage, enabling decarbonization. Photocatalytic H2 (green hydrogen) production processes are targeting the intensification of separated solar energy harvesting, storage and electrolysis, conventionally yielding O2/H2. While catalysis is being investigated extensively, little is done on bridging the gap, related to reactor unit design, optimisation and scaling, be it that of material or of operation. Herein, metals, oxides, perovskites, nitrides, carbides, sulphides, phosphides, 2D structures and heterojunctions are compared in terms of parameters, allowing for efficiency, thermodynamics or kinetics structure–activity relationships, such as the solar-to-hydrogen (STH). Moreover, prominent pilot systems are presented summarily. |
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Keywords: | Renewable energy Water splitting Photoreactor Industrial photocatalysis |
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