Li Luming, Wu Song, Li Hongmei, Deng Jie, Li Junshan
College of Food and Biological Engineering, Chengdu University, Chengdu 610106, China.
Institute for Advanced Study, Chengdu University, Chengdu 610106, China.
Nanomaterials (Basel). 2022 Apr 24;12(9):1451. doi: 10.3390/nano12091451.
A nanocomposite NiPt/5LSBA-160 catalyst comprised of highly dispersed Ni nanoparticles contacting intimately with Pt over novel mesoporous LaFeO-SBA-15-CTA support with a high specific surface area (SSA) was successfully developed for the dry reforming of methane. Results revealed that the high SSA mesoporous LaFeO-SBA-15-CTA materials could first be synthesized by an in situ growth hydrothermal process and used as an excellent carrier candidate of Ni-based catalysts to achieve enhanced catalytic activity due to the strong interaction between LaFeO and Ni species. Moreover, the introduction of Pt over a Ni/5LSBA-160 catalyst would further promote the interaction between Ni and support, improve the dispersion of active Ni centers and obtain a higher syngas formation rate as well as tolerance to carbon coking than that of a Pt-free Ni/5LSBA-160 catalyst sample. This finding uncovers a promising prospect for high SSA mesoporous perovskite preparation and utilization in catalysis such as oxidation, hydrogenation, photocatalysis, energy conversion and so on.
一种由高度分散的镍纳米颗粒与铂紧密接触组成的纳米复合NiPt/5LSBA - 160催化剂，负载在具有高比表面积（SSA）的新型介孔LaFeO - SBA - 15 - CTA载体上，已成功开发用于甲烷干重整。结果表明，高比表面积的介孔LaFeO - SBA - 15 - CTA材料可首先通过原位生长水热法合成，并用作镍基催化剂的优良载体候选物，由于LaFeO与镍物种之间的强相互作用，从而实现增强的催化活性。此外，在Ni/5LSBA - 160催化剂上引入铂将进一步促进镍与载体之间的相互作用，改善活性镍中心的分散性，并获得比不含铂的Ni/5LSBA - 160催化剂样品更高的合成气生成速率以及对碳结焦的耐受性。这一发现揭示了高比表面积介孔钙钛矿在催化（如氧化、氢化、光催化、能量转换等）方面制备和应用的广阔前景。
