Ternary NiMo-Bi liquid alloy catalyst for efficient hydrogen production from methane pyrolysis

• 成果类型: Article
• 署名作者: Chen, Luning; Song, Zhigang; Zhang, Shuchen; Chang, Chung-Kai; Chuang, Yu-Chun; Peng, Xinxing; Dun, Chaochao; Urban, Jeffrey J.; Guo, Jinghua; Chen, Jeng-Lung; Prendergast, David; Salmeron, Miquel; Somorjai, Gabor A.; Su, Ji
• 署名单位: United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; Harvard University; National Synchrotron Radiation Research Center; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; University of California System; University of California Berkeley; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-11490
• DOI: 10.1126/science.adh8872
• 发表日期: 2023-08-25
• 页码: 857-861
• 关键词: molten metals; DECOMPOSITION; hydrocarbons; conversion; kinetics; energy

摘要

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.