This paper reviews the potential and roadmap for hydrogen energy as a crucial component of the clean energy landscape, focusing on Brazil, Austria, and Germany. The primary objective is to present a comprehensive literature overview, highlighting key themes, trends, and research gaps in the scientific discourse concerning hydrogen production and energy policy. Each country's unique energy policies and approaches to renewable energy are examined, with Brazil showcasing vast renewable energy potential, particularly in wind and solar, Germany promoting innovation and technological expansion, and Austria dedicated to decarbonization through biomethane for residential heating and cooling. The study uses bibliometric analysis to identify the most crucial keywords and their frequencies, emphasizing the multidisciplinary approach to advancing hydrogen production technologies. It also reviews the global landscape of research publications on hydrogen production, with China leading in contributions, followed by the United States, India, South Korea, Turkey, Iran, and Canada. In the context of decarbonization energy policies, the paper discusses the European Union's directives and agreements, such as the Renewable Energy Directive and the Fuel Quality Directive, which have shaped the transition towards renewable energy sources. Austria's commitment to renewable energy is highlighted through its "Mission 2030" and the Climate and Energy Fund, while Germany's ambitious goals include increasing the share of renewable energy to 50% by 2030 and 80% by 2050. Brazil's renewable energy landscape is characterized by a significant commitment to biofuels and solar and wind energy, with policies like the Alternative Sources Incentive Program (PROINFA) and the National Biofuels Policy (RenovaBio) fostering the growth of renewable energy. The paper also explores the challenges and opportunities in hydrogen production between Brazil and Europe, emphasizing the need for sustained research and effective policy interventions to overcome technological and economic barriers. Finally, the paper discusses the importance of hydrogen storage as an essential component in the transition to sustainable energy, highlighting the need for collaborative efforts and interdisciplinary approaches to advance hydrogen storage technology.This paper reviews the potential and roadmap for hydrogen energy as a crucial component of the clean energy landscape, focusing on Brazil, Austria, and Germany. The primary objective is to present a comprehensive literature overview, highlighting key themes, trends, and research gaps in the scientific discourse concerning hydrogen production and energy policy. Each country's unique energy policies and approaches to renewable energy are examined, with Brazil showcasing vast renewable energy potential, particularly in wind and solar, Germany promoting innovation and technological expansion, and Austria dedicated to decarbonization through biomethane for residential heating and cooling. The study uses bibliometric analysis to identify the most crucial keywords and their frequencies, emphasizing the multidisciplinary approach to advancing hydrogen production technologies. It also reviews the global landscape of research publications on hydrogen production, with China leading in contributions, followed by the United States, India, South Korea, Turkey, Iran, and Canada. In the context of decarbonization energy policies, the paper discusses the European Union's directives and agreements, such as the Renewable Energy Directive and the Fuel Quality Directive, which have shaped the transition towards renewable energy sources. Austria's commitment to renewable energy is highlighted through its "Mission 2030" and the Climate and Energy Fund, while Germany's ambitious goals include increasing the share of renewable energy to 50% by 2030 and 80% by 2050. Brazil's renewable energy landscape is characterized by a significant commitment to biofuels and solar and wind energy, with policies like the Alternative Sources Incentive Program (PROINFA) and the National Biofuels Policy (RenovaBio) fostering the growth of renewable energy. The paper also explores the challenges and opportunities in hydrogen production between Brazil and Europe, emphasizing the need for sustained research and effective policy interventions to overcome technological and economic barriers. Finally, the paper discusses the importance of hydrogen storage as an essential component in the transition to sustainable energy, highlighting the need for collaborative efforts and interdisciplinary approaches to advance hydrogen storage technology.