This review article discusses the production of carbon-neutral hydrogen through catalytic methane decomposition, focusing on catalyst development, deactivation, regeneration, and economic aspects. Methane decomposition is a promising method for hydrogen production, generating pure hydrogen and valuable carbon nanomaterials. However, catalyst deactivation due to carbon deposition and metal sintering remains a challenge. The review covers various catalyst types, including mono-, bi-, and trimetallic compounds, as well as carbon-based catalysts. Metal-based catalysts such as nickel, iron, and cobalt are highlighted for their catalytic activity and stability. Bimetallic and trimetallic catalysts show improved performance and stability compared to mono-metallic ones. Carbon-based catalysts offer advantages such as good catalytic stability, low cost, and resistance to sulfur poisoning. However, they may produce undesired by-products and require regeneration. The review emphasizes the importance of catalyst selection, synthesis methods, and support materials in optimizing the efficiency and stability of catalysts for methane decomposition. The study concludes that catalytic methane decomposition has potential for environmentally friendly hydrogen production, but further research is needed to address challenges such as catalyst deactivation and regeneration.This review article discusses the production of carbon-neutral hydrogen through catalytic methane decomposition, focusing on catalyst development, deactivation, regeneration, and economic aspects. Methane decomposition is a promising method for hydrogen production, generating pure hydrogen and valuable carbon nanomaterials. However, catalyst deactivation due to carbon deposition and metal sintering remains a challenge. The review covers various catalyst types, including mono-, bi-, and trimetallic compounds, as well as carbon-based catalysts. Metal-based catalysts such as nickel, iron, and cobalt are highlighted for their catalytic activity and stability. Bimetallic and trimetallic catalysts show improved performance and stability compared to mono-metallic ones. Carbon-based catalysts offer advantages such as good catalytic stability, low cost, and resistance to sulfur poisoning. However, they may produce undesired by-products and require regeneration. The review emphasizes the importance of catalyst selection, synthesis methods, and support materials in optimizing the efficiency and stability of catalysts for methane decomposition. The study concludes that catalytic methane decomposition has potential for environmentally friendly hydrogen production, but further research is needed to address challenges such as catalyst deactivation and regeneration.