The global H₂ combustion engine market is projected to have a high-paced CAGR of 9.78% during the forecast period. The current valuation of the H₂ combustion engine market is $18.22 B in 2023. The value of the H₂ combustion engine market is anticipated to reach a high of $46.31 B by the year 2033.

The key aspects pushing the adoption of H₂ combustion engine is owing to government attempts to promote the use of fuel cell cars, a growth in the demand for fuel cells in automotive and transportation, and an increase in the demand for passenger transportation. Internal combustion engines have long been popular.

Despite this, original equipment manufacturers (OEMs) are turning their attention to natural gas and H₂-based engines because to the rising cost of crude oil, strict emission regulations, fuel supply security, and noise pollution. This is evidently likely to promote the global H₂ combustion engine.

In addition, an increase in government and other organizational support for the development and commercialization of refueling infrastructure throughout the world is projected to result in the rapid advancement of the global market for H₂ combustion engines over the next few years.

In addition, the approaching decline in fuel cell costs, brought on by the rising use of creative strategies by fuel producers to lower fuel prices, is anticipated to improve the market's development prospects in the years to come. H₂ combustion engines are gradually evolving because of different technical breakthroughs and inventions, allowing them to provide high power outputs while also improving fuel efficiency.

Despite a rise in demand for electric engines and a corresponding decrease in demand for internal combustion engines powered by traditional sources, H₂ combustion engines are estimated to continue to play an important role in the evolution of the automobile industry. Furthermore, they can improve in a variety of areas, including thermal efficiency, emissions, and electrification.

The need for research is always being filled by researchers. Because more H₂-powered vehicles could be produced and put on the market thanks to the development of low-cost H₂ energy production technology, H₂ vehicles became a reality.

Growing scientific study has pushed vehicle manufacturers to build eco-friendly automobiles on the market to minimize carbon emissions in the environment. These factors are anticipated to expand the global H₂ combustion engine market size in the forecast period.

However, H₂ (in gaseous form) is often produced from water using electrolysis, which involves sending a strong electric current through water to separate oxygen and H₂ atoms. The electrolysis technique is highly expensive due to the high energy needs. Moreover, the stringent norms and regulations regarding greenhouse gas emissions are expected to impede market growth.