Abstract

Syngas is a very important intermediate in chemical industry for energy chemicals production through F–T synthesis. Methane steam reforming (MSR) and dry reforming (MDR) reactions are two extensively studied approaches for syngas production. Developing sintering-resistant catalyst for syngas production from the reforming reactions is a hot topic because high-temperature requirement for the reactions always deactivates catalyst due to sintering and carbon deposition. In this study, we synthesized sintering-resistant Ni@SiO₂ catalyst for stable performances of MSR and MDR. Characterization of TEM, XRD, etc., revealed that the Ni@SiO₂ catalyst could maintain original core–shell structure and preserve Ni nanoparticle size at temperature as high as 1123 K. The excellent sintering resistance was attributed to encapsulation of thermally stable SiO₂ nanospheres, which confined Ni nanoparticles migration and thus avoided aggregation. The work provided a potential sintering-resistant catalyst for heterogeneous reactions.

Graphic abstract

中文翻译：

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耐烧结Ni @ SiO 2催化剂上甲烷蒸汽重整和干重整反应生产合成气

抽象的

合成气是化学工业中非常重要的中间体，可通过FT合成来生产能源化学品。甲烷蒸汽重整（MSR）和干重整（MDR）反应是生产合成气的两种广泛研究的方法。开发用于重整反应生产合成气的耐烧结催化剂是一个热门话题，因为由于烧结和碳沉积，反应的高温要求总是会使催化剂失活。在本研究中，我们合成了耐烧结的Ni @ SiO ₂催化剂，以保持MSR和MDR的稳定性能。TEM，XRD等的表征表明，Ni @ SiO ₂催化剂可以保持原始的核-壳结构并在高达1123 K的温度下保留Ni纳米颗粒的尺寸。出色的抗烧结性归因于热稳定的SiO ₂纳米球的包封，这限制了Ni纳米颗粒的迁移并因此避免了聚集。这项工作为多相反应提供了一种潜在的抗烧结催化剂。

图形摘要