Green Hydrogen Innovation and Industrial Decarbonization: A Comparative Analysis of Sustainability-Oriented Energy Transition Systems in Germany and Australia

Abstract

The global pursuit of carbon neutrality has accelerated the development of green hydrogen as a strategic component of sustainable energy transitions and industrial decarbonization pathways. As countries seek alternatives to fossil fuels, green hydrogen has emerged as a promising solution for reducing emissions in hard-to-abate sectors including steel production, chemicals, transportation, and heavy manufacturing. However, substantial variation exists in the pace and effectiveness of green hydrogen deployment across national innovation systems. This study investigates how scientific capacity, innovation governance, and industrial policy influence green hydrogen development through a comparative analysis of Germany and Australia. Both countries are recognized as leaders in energy transition strategies yet differ significantly in industrial structures, resource endowments, governance arrangements, and technological deployment models. Drawing upon sustainability transition theory, innovation systems scholarship, and socio-technical governance frameworks, this study synthesizes evidence from the International Energy Agency (IEA), OECD, International Renewable Energy Agency (IRENA), World Bank, and peer-reviewed literature. The findings indicate that successful hydrogen transitions depend not only on technological innovation but also on institutional coordination, infrastructure investment, market formation mechanisms, and policy coherence. Germany demonstrates strengths in industrial integration and technological commercialization, while Australia benefits from abundant renewable energy resources and export-oriented hydrogen strategies. The study proposes a conceptual model linking scientific capacity, innovation coordination, hydrogen deployment, industrial decarbonization, and sustainable economic transformation. The findings contribute to interdisciplinary scholarship on energy transitions and provide policy insights for countries seeking to accelerate low-carbon industrial development.