美国劳伦斯伯克利国家实验室Ji Su团队报道了高效甲烷裂解制氢的三元NiMo-Bi液态合金催化剂。相关研究成果于2023年8月25日发表于国际一流学术期刊《科学》。

甲烷热解（MP）是一种潜在的无二氧化碳氢气生产技术，只产生固体碳副产品。然而，开发一种在中等温度下稳定热解甲烷的高效催化剂一直具有挑战性。

该文中，研究人员提出了一种新的高效催化剂，通过添加Mo对Ni-Bi液体合金进行改性来制备三元NiMo-Bi液体合金催化剂（LAC）。该催化剂表现出81.2千焦/摩尔的相当低的活化能，这使得MP能够在450至800摄氏度之间的温度下进行，并且氢生成效率为每克镍每分钟4.05毫升。在800摄氏度下，催化剂表现出100%的H₂选择性和120小时的稳定性。

附：英文原文

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

Author: Luning Chen, Zhigang Song, Shuchen Zhang, Chung-Kai Chang, Yu-Chun Chuang, Xinxing Peng, Chaochao Dun, Jeffrey J. Urban, Jinghua Guo, Jeng-Lung Chen, David Prendergast, Miquel Salmeron, Gabor A. Somorjai, Ji Su

Issue&Volume: 2023-08-25

Abstract: 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.

DOI: 10.1126/science.adh8872

Source: https://www.science.org/doi/full/10.1126/science.adh8872