Department of Chemistry, Research Center of Nano Science and Technology, Shanghai University, 99 Shangda Road, Shanghai 200444, China.
Nanoscale. 2018 Jun 7;10(22):10528-10537. doi: 10.1039/c8nr02006j.
In this study, halloysites, one of the most abundant clays, with hollow nanotube features were reconstructed by selectively etching silica from the outermost layer of the halloysites associated with unzipping the nanotubes to nanosheets via ball milling, and then, nickel nanoparticles were confined by the resulting defects in the nanosheets to boost charge transfer by a wet impregnation method. The obtained materials were developed as coke-resistant defect-confined Ni-based nanosheet-like catalysts for CO2 reforming of methane (CRM) for the first time. The as-prepared catalyst exhibited good coke and sintering resistance performance in CRM, and especially, there was almost no loss of activity even after a 20 h stability test due to the strong interaction between the Ni nanoparticles and the support. The present investigations may provide a new pathway for the design and application of highly coke-resistant CRM catalysts.
在这项研究中，通过球磨选择性地从与纳米管解旋相关的最丰富粘土之一的埃洛石的最外层蚀刻二氧化硅，重构埃洛石，然后通过湿浸渍法将镍纳米颗粒限制在纳米片中的缺陷中，以促进电荷转移。首次将得到的材料开发为抗积碳缺陷限制的镍基纳米片状催化剂，用于甲烷的二氧化碳重整（CRM）。所制备的催化剂在 CRM 中表现出良好的抗积碳和抗烧结性能，特别是由于 Ni 纳米颗粒和载体之间的强相互作用，即使在 20 小时的稳定性测试后，活性也几乎没有损失。本研究可能为设计和应用高抗积碳 CRM 催化剂提供了新途径。
