The MgO-doped hexagonal boron nitride (MgO-h-BN) nanomaterials were designed as a support for Palladium (Pd) catalysts for CO oxidation reaction. The catalytic properties of Pd/MgO(5)-h-BN catalyst was investigated and compared with Pd/h-BN catalyst. Transmission electron microscopy (TEM) results suggested that the PdO nanoparticles with small grain sizes (ca. 8 nm) were effectively dispersed on the surface of MgO, and the MgO were deposited on the h-BN nanosheets in the Pd/MgO(5)-h-BN catalyst. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses revealed that a small amount of Mg²⁺ embedded into the B vacancies of h-BN nanosheets in the Pd/MgO(5)-h-BN catalyst. More significantly, a large amount of adsorbed oxygen appeared near the B vacancies of Pd/MgO(5)-h-BN catalyst. The experiments outcomes of diffuse reflectance fourier transform spectra analysis of CO (CO-DRIFT) indicated that the carbonate/formate species were easily decomposed to CO₂ on the Pd/MgO(5)-h-BN catalyst than Pd/h-BN catalyst, which might be a reason why the Pd/MgO(5)-h-BN catalyst had high CO oxidation activity. According to above analyses, we provide a new insight for the MgO-h-BN nanomaterials for Pd catalysts for application in CO oxidation reaction.

MgO掺杂的六方氮化硼（MgO-h-BN）纳米材料被设计为用于CO氧化反应的钯（Pd）催化剂的载体。研究了Pd / MgO（5）-h-BN催化剂的催化性能，并与Pd / h-BN催化剂进行了比较。透射电子显微镜（TEM）结果表明，具有小粒径（约8 nm）的PdO纳米颗粒有效地分散在MgO的表面上，并且MgO沉积在Pd / MgO中的h-BN纳米片上（5） -h-BN催化剂。X射线衍射（XRD）和X射线光电子能谱（XPS）分析表明，少量的Mg ²⁺嵌入到Pd / MgO（5）-h-BN催化剂中的h-BN纳米片的B空位中。更重要的是，大量的吸附氧出现在Pd / MgO（5）-h-BN催化剂的B空位附近。CO（CO-DRIFT）的漫反射傅里叶变换光谱分析的实验结果表明，碳酸盐/甲酸酯物种在Pd / MgO（5）-h-BN催化剂上比Pd / h-BN催化剂更容易分解为CO ₂。 ，这可能是Pd / MgO（5）-h-BN催化剂具有高CO氧化活性的原因。根据以上分析，我们为用于Pd催化剂的MgO-h-BN纳米材料在CO氧化反应中的应用提供了新的见识。