Eu³⁺ → Eu²⁺ and Ce⁴⁺ → Ce³⁺ reduction in Au/Ce_0.80Eu_0.20O₂ catalyst were systematically studied using in-situ NAP-XPS technique. The reduction of Eu³⁺ → Eu²⁺ in the ceria, in a hydrogen atmosphere at temperature ≥ 400 °C, has been demonstrated for the first time. The effect of the reduction of Ce_0.80Eu_0.20O₂ support on the catalytic activity of Au nanoparticles in CO oxidation has been investigated.

中文翻译：

---

NAP-XPS研究Eu / Ce _0.80 Eu _0.20 O ₂催化剂中Eu ³⁺  →Eu ²⁺和Ce ⁴⁺  →Ce ³⁺还原

利用原位NAP-XPS技术系统地研究了Au / Ce _0.80 Eu _0.20 O ₂催化剂中Eu ³⁺  →Eu ²⁺和Ce ⁴⁺  →Ce ^3+的还原。首次证明了在温度≥400°C的氢气气氛中，二氧化铈中Eu ³⁺  →Eu ²⁺的还原。研究了Ce _0.80 Eu _0.20 O ₂载体的还原对Au纳米颗粒在CO氧化中催化活性的影响。