In this study, the nanostructured bimetallic Ru-Co catalysts (Ru-Co core particles of ca. 50 nm; SiO₂ sell thickness of 6.1 nm, and n_Ru/n_Co = 0.008) were fabricated through the hydrothermal (or impregnation) and modified Stöber processes. The developed catalysts were characterized by means of XRD, N₂ sorption, TEM, XPS, TG-MS, and H₂-TPR, and evaluated for CO₂ reforming of methane to syngas, to establish a detailed structure-performance correlation. The strategy of catalyst design effectively reduced metal sintering at reaction temperatures. Uniform Ru distribution through a hydrothermal approach resulted in more direct Co-Ru interaction, which caused the Co-based cores rather coking- and oxidation-resistant, and induced a phase transformation of β-Co to α-Co under the reaction atmosphere, beneficial for the reaction. The silica shell porosity was modified by applying the CTAB and PVP surfactants in shell encapsulation. In terms of reaction temperature (700 °C), CH₄ turnover frequency (84.3 s⁻¹), H₂/CO ratio (0.98), and carbon deposition rate (0.5 mg_coke g_cat⁻¹ h⁻¹), the currently developed binary Ru-Co catalyst with uniform Ru distribution and improved SiO₂ shell porosity is proved to be highly efficient yet durable with a desirable H₂/CO ratio for the target reaction. In view of the unique features of catalyst material and the outstanding reaction performance on the basis of CH₄ TOF, new insights into the Co-based catalyst for DRM are provided in the current work.

在这项研究中， 通过水热法（或浸渍法）制备了纳米结构双金属Ru-Co催化剂（Ru-Co核芯颗粒约50 nm； SiO ₂出售厚度为6.1 nm，n _Ru / n _Co = 0.008）。修改后的Stöber流程。通过XRD，N ₂吸附，TEM，XPS，TG-MS和H ₂ -TPR对已开发的催化剂进行表征，并评估其CO ₂将甲烷重整为合成气，建立详细的结构-性能关联。催化剂设计策略有效地减少了反应温度下的金属烧结。通过水热法均匀分布的Ru导致更直接的Co-Ru相互作用，这导致Co基核相当耐焦化和抗氧化，并在反应气氛下诱导了β-Co相向α-Co的相变，这是有益的反应。通过在壳包封中应用CTAB和PVP表面活性剂来改善二氧化硅壳的孔隙率。在反应温度（700°C），CH ₄转化频率（84.3 s ^-1），H ₂ / CO比（0.98）和碳沉积速率（0.5 mg_焦炭g _cat ^-1）方面 h ^-1），目前开发的具有均匀Ru分布和改善的SiO ₂壳层孔隙率的二元Ru-Co催化剂被证明是高效且耐用的，目标反应具有理想的H ₂ / CO比。鉴于催化剂材料的独特特性和基于CH ₄ TOF的出色反应性能，当前工作提供了对DRM钴基催化剂的新见解。