化学
二氧化碳重整
甲烷
焦炭
氧气
选择性
离解(化学)
碳纤维
二氧化碳
化学工程
合成气
催化作用
有机化学
材料科学
复合数
工程类
复合材料
作者
Hailong Xiong,Yueyue Dong,Canyu Hu,Yihong Chen,Hengjie Liu,Ran Long,Tingting Kong,Yujie Xiong
摘要
Dry reforming of methane (DRM) is a promising technique for converting greenhouse gases (namely, CH4 and CO2) into syngas. However, traditional thermocatalytic processes require high temperatures and suffer from low selectivity and coke-induced instability. Here, we report high-entropy alloys loaded on SrTiO3 as highly efficient and coke-resistant catalysts for light-driven DRM without a secondary source of heating. This process involves carbon exchange between reactants (i.e., CO2 and CH4) and oxygen exchange between CO2 and the lattice oxygen of supports, during which CO and H2 are gradually produced and released. Such a mechanism deeply suppresses the undesired side reactions such as reverse water–gas shift reaction and methane deep dissociation. Impressively, the optimized CoNiRuRhPd/SrTiO3 catalyst achieves ultrahigh activity (15.6/16.0 mol gmetal–1 h–1 for H2/CO production), long-term stability (∼150 h), and remarkable selectivity (∼0.96). This work opens a new avenue for future energy-efficient industrial applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI