Catalysts decide how fast, how cleanly and how cheaply a chemical reaction runs, and at the nanoscale they do it with far less metal. The nanocatalysts market was valued at USD 3.1 billion in 2025 and is projected to reach USD 6.3 billion by 2034, growing at an 8.2% CAGR from 2026 to 2034. Demand is rising across hydrogen production, fuel cells, vehicle emission control, petrochemicals and pharmaceutical synthesis. This article covers the nanocatalyst market size, nanocatalysts market share, key