NASA's MOXIE Produced 122 Grams of Oxygen on Mars, Proving 12-Gram-an-Hour ISRU Works
Updated
Updated · spacedaily.com · Jun 12
NASA's MOXIE Produced 122 Grams of Oxygen on Mars, Proving 12-Gram-an-Hour ISRU Works
2 articles · Updated · spacedaily.com · Jun 12
Summary
MOXIE generated 122 grams of breathable oxygen across 16 runs on Mars from April 2021 to August 2023, becoming the first device to make air on another planet.
5.4 grams came in its first hour, and the microwave-sized instrument later reached 12 grams per hour at 98%+ purity—double its original design target.
The Perseverance payload pulled in Mars's carbon-dioxide-rich air and used solid oxide electrolysis at about 800C, showing the process could survive dust, cold and seasonal swings with only modest degradation.
25 metric tons of oxygen would be needed just for a four-astronaut return vehicle, so MOXIE was only a proof of concept; a human-scale system would need roughly 2-3 kilograms per hour and 25-30 kilowatts.
That result strengthens the case for using Martian resources in future missions, even as the larger engineering, funding and human-flight hurdles to a crewed Mars return remain unresolved.
MOXIE proved oxygen can be made on Mars, but what is the biggest obstacle to producing the tons needed for a human base?
Is converting Martian air to oxygen more viable than splitting its water ice, which yields both breathable air and rocket fuel?
Beyond technical success, what are the unforeseen environmental risks of establishing large-scale industrial processes on Mars for the first time?
From 122 Grams to a Martian Future: How MOXIE’s Oxygen Production Revolutionizes Mars Exploration
Overview
MOXIE, an instrument on NASA’s Perseverance rover, made history by producing oxygen directly from the carbon dioxide-rich Martian atmosphere. This achievement marks the first time resources have been harvested and used on another planet, setting a vital precedent for future human missions. MOXIE’s success shows that astronauts could one day 'live off the land' on Mars, which is crucial for reducing the need to transport supplies from Earth. By proving that local resources can be converted into essential products, MOXIE has brought humanity closer to sustainable space exploration and long-term presence on Mars.