Promotional effects of B-terminated defective edges of Ni/boron nitride catalysts for coking- and sintering-resistant dry reforming of methane

By Kankan Bu, Jiang Deng, Xiaoyu Zhang, Sanchai Kuboon, Tingting Yan, Hongrui Li, Liyi Shi, Dengsong Zhang. 2020

138 citations recorded by the source corpus.

Abstract It is urgent to develop highly sintering- and coking-resistance nickel-based catalysts for efficient dry reforming of methane (DRM). Here, we rationally designed and originally developed boron nitride defect-confined Ni catalysts (Ni/d-BN) for DRM by sonication-assisted alcoholysis and chemical peeling techniques. Ni/d-BN catalysts which exposed more B terminal sites exhibited very high catalytic activity, excellent stability and coking-resistance. The defect sites of BN were found to play a key role in adsorption and activation of reaction gases. The B-terminal sites in d-BN can be directly used as active sites for DRM reaction and it also can effectively promote the formation of B-O H*, thus increasing the rate of conversion of carbonate species and CHx* species into formate species, greatly promoting the formation of CO and effectively preventing coke deposition. This work paves the way for design of catalysts with simultaneous coking- and sintering-resistant of supported Ni-based catalysts for DRM applications.

Subfields: Catalysis, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/badc144629d9e1fd339bc18d84a8bb23d5209ff2