The solution combustion synthesis was used for preparation of porous CeO₂ with two different fuels; glucose and citric acid, for combustion. The samples of porous CeO₂ are labeled as PCO_Glu and PCO_Cit. The surface area of PCO_Cit and PCO_Glu were estimated as 44.50 ± 0.12, and 47.72 ± 0.16 m² g⁻¹, respectively. The cavities acidity, OH groups on surface, and its bond strength to the active cerium sites are compared by measuring the pH of zero charges; that it was 11.95 ± 0.02, and 11.90 ± 0.03 for PCO_Cit and PCO_Glu, respectively. The nanosized palladium (NPd) was loaded on PCO_Glu and PCO_Cit via wetness incorporation. As-prepared nano-microstructure electrocatalysts are utilized in the electrooxidation of C1 compounds, including methanol, formaldehyde, and formic acid. The NPd-PCO_Glu presents higher electrocatalytic activity, stability and CO-tolerance ability for the electrooxidation of C1 compounds as compared to the NPd-PCO_Cit and NPd as non-supported palladium; So that, the performance of the modified electrodes increase in the order of NPd < NPd-PCO_Cit < NPd-PCO_Glu. The PCO with porous structural network affected on the electrochemical surface area, dispersion, and durability of NPd. It is effective the capability of removing the poisoning species of the electrooxidation of C1 compounds on NPd through the lattice oxygen, and the activation of an oxidation−reduction cycle between the high and low chemical valences of cerium, leading to improve the electrocatalytic efficiency of NPd. Lastly, the conversion of methanol to formaldehyde, and then to formic acid during electrooxidation is confirmed by using cyclic voltammetry.

固溶燃烧合成用于制备两种不同燃料的多孔CeO ₂。葡萄糖和柠檬酸，用于燃烧。多孔CeO ₂样品标记为PCO _Glu和PCO _Cit。PCO _Cit和PCO _Glu的表面积分别估计为44.50±0.12和47.72±0.16 m ²  g ^-1。通过测量零电荷的p H比较空穴的酸度，表面的OH基及其与活性铈位点的结合强度；PCO _Cit和PCO _Glu分别为11.95±0.02和11.90±0.03， 分别。纳米钯（NPd）通过掺入湿气装载到PCO _Glu和PCO _Cit 上。所制备的纳米微结构电催化剂用于C1化合物（包括甲醇，甲醛和甲酸）的电氧化。与作为非负载钯的NPd-PCO _Cit和NPd相比，NPd-PCO _Glu对C1化合物的电氧化具有更高的电催化活性，稳定性和耐CO的能力。因此，修饰电极的性能按NPd <NPd-PCO _Cit  <NPd-PCO _Glu的顺序增加。具有多孔结构网络的PCO会影响NPd的电化学表面积，分散性和耐久性。它具有通过晶格氧去除NPd上C1化合物电氧化中毒种类的能力以及激活铈高和低化学价之间的氧化还原循环的能力，从而提高NPd的电催化效率。最后，通过循环伏安法证实了在电氧化过程中甲醇转化为甲醛，然后转化为甲酸。