Designing Underwater Superaerophobic Surface of 3D Porous Nanocrystalline Ni-Zn Alloy: An Efficient Electrocatalyst for Hydrazine Electrooxidation. Issue 10 (13th June 2019)

• Record Type: Journal Article
• Authors: Feng, Zhongbao; Wang, Lin; Du, Xinghong; Sun, Qiang; Lu, Pai; Xing, Pengfei; An, Maozhong
• Is Part Of: Journal of the Electrochemical Society. Volume 166:Issue 10(2019)
• Page Start: F604
• Page End: F609
• Publication Date: 2019-06-13
• Subjects: Electrocatalysis -- Hydrazine oxidation -- Nanocrystalline -- Ni-Zn catalyst; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.1081910jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : The structure and architecture of materials play a vital role in the electrocatalytic performance of catalyst. In the present work, 3D porous nanocrystalline Ni-Zn catalyst with superaerophobic surface was successfully synthesized on Ni foam (NF) substrate through the combined nano-electrodepostion of Ni-Zn alloy and followed electrochemical leaching. The prepared nanocrystalline Ni-Zn catalyst exhibits an exceptionally high electrocatalytic performance with a superior current density of 512 mA cm −2 at 0.2 V, excellent durability with a retention rate of 93.9% after 5000 s and nearly 100% selectivity toward the complete hydrazine oxidation, which is at the top-notch level among the reported electrocatalysts for hydrazine oxidation up to date. Interestingly, the catalytic mechanism of nanocrystalline Ni-Zn catalyst with enhanced properties is discussed, which is mainly related to its high intrinsic activity, large electrochemical active surface area (ECSA) and high electrical conductivity, most importantly, its superaerophobic surface structure. The prepared nanocrystalline Ni-Zn catalyst has a potential application in hydrazine electrooxidation as well as other catalytic fields.