CH4 and CO2 conversion over boron nitride-supported Ni catalysts with BO defects in DBD plasma

• Published in: Fuel processing technology 2023-04, Vol.242, Article 107655
• Main Authors: Li, Yuanling, Yu, Han, Dai, Jing, Zhang, Zhenzong, Zhang, Zhichao, Yu, Hongbing, Liu, Lina
• Format: Article
• Language: English
• Subjects: Boron nitride; CH4 and CO2 conversion; CO2 utilization; Non-thermal plasma
• ISSN: 0378-3820; 1873-7188
• DOI: 10.1016/j.fuproc.2023.107655

Non-thermal plasma (NTP) combined with catalysts supplies a potential alternative to enable the CH4 and CO2 conversion to work at low temperatures. In this study, different Ni/BN catalysts were synthesized using modified wetness impregnation for CH4 and CO2 conversion in dielectric barrier discharge (DBD) plasma. Among, BN_IPA_Ni exhibited the highest catalytic performance with a CH4 conversion of 40.5%, a CO2 conversion of 26.6%, a H2 yield of 9.3% and a CO yield of 10.5%. The development of BO defects, which played a significant role in the size control of Ni particles to facilitate the dissociation of CH4 to form H*, is the key for the high catalysis activity and selectivity in this reaction. In addition, the BO defects of BN_IPA_Ni provide an efficient route to eliminate excess CHx species, which further inhibit the nucleation growth of carbon species to inert carbon. [Display omitted] •DBD plasma-catalysis facilitated the CH4 and CO2 conversion at low temperature.•BN_IPA_Ni exhibited the most superior catalytic performance.•BO defects controlled the size of Ni particles to facilitate CH4 dissociation.•BO defects in BN_IPA_Ni assisted in eliminating excess CHx species.