Journal
SCIENCE
Volume 381, Issue 6660, Pages 857-861Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.adh8872
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Methane pyrolysis is a CO2-free hydrogen production technology and the use of NiMo-Bi liquid alloy catalyst allows for efficient and stable methane pyrolysis at moderate temperatures, while producing high-purity hydrogen.
Methane pyrolysis (MP) is a potential technology for CO2-free hydrogen production that generates only solid carbon by-products. However, developing a highly efficient catalyst for stable methane pyrolysis at a moderate temperature has been challenging. We present a new and highly efficient catalyst created by modifying a Ni-Bi liquid alloy with the addition of Mo to produce a ternary NiMo-Bi liquid alloy catalyst (LAC). This catalyst exhibited a considerably low activation energy of 81.2 kilojoules per mole, which enabled MP at temperatures between 450 and 800 Celsius and a hydrogen generation efficiency of 4.05 ml per gram of nickel per minute. At 800 Celsius, the catalyst exhibited 100% H2 selectivity and 120 hours of stability.
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