近日，课题组硕士生刘欢欢的论文“Synergistic doping and tailoring: Realizing in depth modulation on valence state of CoFe spinel oxide for high-efficiency water oxidation ”被 Applied Surface Science（2020年中科院SCI期刊二区Top期刊，IF=6.707）接收！该工作运用化学刻蚀和镍原子掺杂的双重手段对反尖晶石结构中Co的电子结构进行深度调控，使得Co²⁺/Co³⁺的比例大幅度提升，从而实现优异的析氧性能。这项工作为高效电催化剂的开发提供了一种可行的方法，并有利于研究人员对三维过渡金属催化剂价态工程的研究。

Highlights

• Combination of Ni-doping and chemical tailoring makes Co²⁺-dominant configuration.

• In depth modulation of valence benefits from synergistic Ni-doping and oxygen vacancy.

• Co²⁺-dominant sample is much more active than the well-balance and Co²⁺-rich ones.

• The preferable eg occupancy and spin state promote OER of Co²⁺-dominant catalyst.

https://www.sciencedirect.com/science/article/pii/S0169433221024405