摘要
Metal oxides have been used as the supports for heterogeneous catalysis formany years,but they still suffer from coking in some high-temperature applications.The main reasons for coking are the uncontrollable dissociation of C-H and the overbalance between carbon deposition and removal.Herein,we find a boron nitride(BN)-immobilized Ni catalyst shows unprecedented coking resistance in dry reforming of methane via the incomplete decomposition of methane.Unlike the Ni-based catalysts supported by traditional metal oxides,BN-supported Ni accelerates the first C-H dissociation while inhibiting the breaking of the final C-H bond;hence,the suppression of the complete decomposition of methane thoroughly addresses the coking issue.This work reveals the fundamental reason for the coking resistance over BN-supported Ni catalysts is selective activation of the C-H bond,which can provide an inspiring idea for other applications.
基金
financial support from the National Natural Science Foundation of China(grant nos.22006098 and 22125604)
Shanghai Sailing Program(grant no.20YF1413300)
J.D.thanks Dr.Lei Xie at Fudan University for fruitful discussions.The computational part is also supported by the JSPS KAKENHI(grant no.JP20K05217)
the supercomputer at RCCS(grant no.22-IMS-C002),Okazaki,Japan.
