review · International Journal of Hydrogen Energy
Transitioning to a hydrogen economy offers an alternative to unsustainable fossil fuel systems. Multiple hydrogen production methods are evaluated across efficiency, environmental impact, and scalability. These pathways include steam methane reforming, biomass gasification, thermochemical processes, photoelectrochemical water splitting, and various forms of electrolysis, specifically proton exchange membrane, alkaline, and solid oxide approaches. Hydrogen serves as a zero-emission clean energy carrier with the capacity to provide long-term storage for renewable energy. Key opportunities for technological innovation lie in high-efficiency solid-state electrolysis and advanced catalysts for water splitting. Furthermore, advancing this energy vector relies on supportive policy recommendations and collaborative efforts involving academia, industry, and government bodies. Together, these technological and policy considerations outline pathways to accelerate the adoption of sustainable hydrogen production within broader energy systems.
Moving away from fossil fuels requires clean energy carriers capable of storing renewable energy over long durations. Comparing the strengths and trade-offs of different hydrogen manufacturing methods provides clear direction for developing cleaner fuels. Identifying priority areas for catalyst and electrolysis research, combined with cross-sector policy guidance, helps guide strategic investments into sustainable power infrastructure.
The review informs industrial energy producers, technology developers, and policymakers assessing hydrogen generation routes. Commercial applications span long-term renewable power storage and fuel replacement. While established methods like steam methane reforming and conventional electrolysis are closer to market, advanced techniques such as high-efficiency solid-state electrolysis and novel water-splitting catalysts represent earlier-stage innovation pathways requiring sustained collaboration across academia and industry.
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The transition to a hydrogen-based economy presents a promising solution to the challenges posed by unsustainable energy systems and reliance on fossil fuels. This comprehensive review explores various hydrogen production methods, emphasizing their technological advancements, sustainability implications, and future prospects. Beginning with an overview of hydrogen's significance as a clean energy carrier, the review examines key production methods such as Steam Methane Reforming, Electrolysis (Proton Exchange Membrane, alkaline, solid oxide), Biomass Gasification, Photoelectrochemical Water Splitting, and Thermochemical Processes. Each method is scrutinized for its efficiency, environmental impact, and scalability, providing valuable insights into their roles in advancing the hydrogen economy. The review highlights the transformative potential of hydrogen production to replace fossil fuels due to its ability to store renewable energy long-term and its zero emissions. It also discusses potential technological advancements, including high-efficiency solid-state electrolysis and advanced catalysts for water splitting, highlighting avenues for innovation in hydrogen production. Additionally, policy recommendations aimed at promoting the hydrogen economy and fostering collaboration between academia, industry, and governments are elucidated. Through a detailed analysis of hydrogen production technologies and future prospects, this review contributes to shaping the trajectory of sustainable energy systems, advancing the adoption of hydrogen as a key energy vector, and underscoring the importance of alternative and sustainable energy sources.
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DOI: 10.1016/j.ijhydene.2024.06.344
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