A sequential dual-passivation strategy for designing stainless steel used above water oxidation
Stainless steel is critical material used in a wide variety of industries. Unfortunately, current development of stainless steel has reached a stagnant stage due to the fundamental limitation of the conventional Cr-based single-passivation mechanism. Here, we show that, by using a sequential dual-passivation mechanism, substantially enhanced anti-corrosion properties can be achieved in Mn-contained stainless steel, with a high breakdown potential of ∼1700 mV (saturated calomel electrode, SCE) in a 3.5 wt% NaCl solution. Specifically, the conventional Cr-based and counter-intuitive Mn-based passivation is sequentially activated during potentiodynamic polarization. The Cr-based passive layer prevents corrosion at low potentials below ∼720 mV(SCE), while the Mn-based passive layer resists corrosion at high potentials up to ∼1700 mV(SCE). The present “sequential dual-passivation” strategy enlarges the passive region of stainless steel to high potentials above water oxidation, enabling them as potential anodic materials for green hydrogen production via water electrolysis.
National Key Research and Development Program of China[2019YFA0209900];Guangdong Innovative and Entrepreneurial Research Team Program[2019ZT08C044];National Natural Science Foundation of China[U1764252];
Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||Department of Materials Science and Engineering|
1.Department of Mechanical Engineering,The University of Hong Kong,Hong Kong,Pokfulam Road,Hong Kong
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Xue Yuan Road 1088,China
|First Author Affilication||Department of Materials Science and Engineering|
Yu，Kaiping,Feng，Shihui,Ding，Chao,et al. A sequential dual-passivation strategy for designing stainless steel used above water oxidation[J]. Materials Today,2023.
Yu，Kaiping,Feng，Shihui,Ding，Chao,Gu，Meng,Yu，Peng,&Huang，Mingxin.(2023).A sequential dual-passivation strategy for designing stainless steel used above water oxidation.Materials Today.
Yu，Kaiping,et al."A sequential dual-passivation strategy for designing stainless steel used above water oxidation".Materials Today (2023).
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