Effects of pre-oxidation conditions on microstructure evolution and hydrogen evolution reaction performance of nano-porous Ag

Journal of Materials Research and Technology

Xu Wang¹  Wanpeng Li¹  Xiaodong Liang²  J.C. Huang²  Wenyu Chen³  Hao Yan³  Ming Wu⁴  Zijun Zhao⁴ 

[1] Engineering;Hong Kong Institute for Advanced Study, City University of Hong Kong, Kowloon, Hong Kong;;Department of Materials Science &School of Mechanical Engineering, Liaoning Petrochemical University, Fushun, 113001, PR China;

关键词: Ultrafine NPS;    Oxidation mechanism;    Homogenous structure;    Hydrogen evolution reaction;   

DOI  :  

来源: DOAJ

【 摘 要 】

A novel strategy was developed to fabricate nano-porous silver (NPS) with a three-dimensional bi-continuous open porous structure. A high temperature oxidation (HTO) craft and a strong oxidant-assisted low-temperature oxidation method were used to tune the dealloying of AgXCu(1-X) ribbons. The NPS fabricated from the Ag15Cu85 ribbon by the HTO pretreatment exhibited a ligament size of ∼841 nm after 1 h of dealloying. However, the NPS fabricated from the Ag15Cu85 ribbon by the H2O2 craft exhibited a ligament size of ∼61 nm after 1 h of dealloying. In addition, the NPS fabricated by the strong oxidant-assisted dealloying craft exhibited an ultrahomogeneous ligament pore structure and a higher Tafel slope in regard to its hydrogen evolution reaction.

【 授权许可】

Unknown