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Coking-resistant dry reforming of methane over BN-nanoceria interface-confined Ni catalysts

机译：Coking-resistant甲烷干重整BN-nanoceria interface-confined镍催化剂

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摘要

Dry reforming of methane (DRM) over Ni-based catalysts is a promising method to convert greenhouse gases CH(4)and CO(2)into valuable synthesis gas. However, the major drawback of DRM over Ni-based catalysts is its deactivation due to metal sintering and coke formation. Herein, Ni catalysts confined between boron nitride (BN)-nanoceria (NC) interfaces have been originally developed and demonstrated as efficient and stable DRM catalysts, which exhibit high activity and high resistance towards carbon deposition. The stronger interaction between nickel and BN-nanoceria interfaces led to higher concentration of Ce(3+)species, which promotes adsorption and activation of CO(2)and thus facilitates the fast formation of -OH species. The active -OH species is crucial to prevent coke formation and improve the stability of Ni catalysts. This work demonstrates that restriction of metal nanoparticles within a nano-interface through the confinement effect is a successful strategy to develop coke-resistant catalysts.
机译：在镍基甲烷干重整(DRM)将催化剂是一种很有前途的方法温室气体CH(4)和(2)价值合成天然气。在其失活是由于镍系催化剂金属烧结和焦炭的形成。催化剂在氮化硼之间(BN) -nanoceria (NC)的接口最初开发和演示高效催化剂和稳定的DRM,展览活性高,耐高碳沉积。镍和BN-nanoceria接口导致更高Ce(3 +)物种的浓度,促进有限公司(2)的吸附和活化,因此促进快速-哦物种的形成。活动-哦物种阻止可口可乐是至关重要的形成和提高镍的稳定性催化剂。金属纳米粒子在一个限制nano-interface通过约束效应一个成功的策略开发coke-resistant催化剂。

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