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
Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
Science. 2023 Aug 25;381(6660):857-861. doi: 10.1126/science.adh8872. Epub 2023 Aug 24.
Methane pyrolysis (MP) is a potential technology for CO-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% H selectivity and 120 hours of stability.
甲烷热解（MP）是一种潜在的无CO制氢技术，仅产生固体碳副产物。然而，开发一种在中等温度下用于稳定甲烷热解的高效催化剂一直具有挑战性。我们展示了一种新型高效催化剂，通过添加Mo对Ni-Bi液态合金进行改性，制得三元NiMo-Bi液态合金催化剂（LAC）。该催化剂表现出相当低的活化能，为每摩尔81.2千焦，这使得在450至800摄氏度的温度下能够进行甲烷热解，且产氢效率为每分钟每克镍4.05毫升。在800摄氏度时，该催化剂表现出100%的H选择性和120小时的稳定性。
