材料科学
过电位
氧化物
析氧
组态熵
金属
催化作用
溶解
化学工程
化学物理
物理化学
电化学
电极
热力学
冶金
物理
工程类
化学
生物化学
作者
Qian Zhang,Yanhui Sun,Feng Liu,Jun Gan,Shixin Gao,Jingjun Liu
标识
DOI:10.1002/adfm.202411766
摘要
Abstract Entropy‐based polymetallic oxides with configurational entropy, structure flexibility, and crystallographic orientation have been regarded as promising catalysts for oxygen evolution reaction (OER), due to their electronic energy band occupation, composition ligand stabilization, and “cocktail” effect. Herein, a rutile RuIrAgMnO 2 oxide with an orientation along the (110) facets is first fabricated by a low‐temperature directional co‐pyrolysis strategy of metal salts on Ti foil at 300 °C. The quaternary oxide exhibits a texture coefficient of 1.13 along (110) facet, resulting from concerted shaping of Ag and Mn components presenting a vibrational entropy of 1.13 R (R is the gas content). In 0.5 m H 2 SO 4 , it displays an overpotential of 171 mV at 10 mA cm −2 for OER, running at a voltage for 340 h at 100 mA cm −2 . The remarkably improved performance can be associated with the presence of the preferred (110) facets with in‐plane strains, which activate and stabilize OER process via electronic energy band reconstruction. More interestingly, the preferential orientation prevents the diffusion or dissolution of active metal ions caused by entropy‐dependent energy barriers, ensuring long‐term stability. This work can pave the way for entropy‐driven polymetallic oxides with optimal structures, disrupting the trade‐off between activity and stability in water oxidation.
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