Electrocatalysis property of CuZn electrode with Pt and Ru decoration
Küçük Resim Yok
Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Electrocatalysis properties strongly depend on the interaction of metallic particles and this
interaction enables to change the electronic structure of alloys which enhances the catalytic activity. This property is the key factor in the developing of cost-effective and efficient
Hydrogen Evolution Reaction (HER) electrocatalysts for sustainable hydrogen production.
In this study, novel electrocatalysts which are decorated with Pt and Ru have been
developed for HER electrocatalysis. Microscopic analysis such as scanning electron microscopy (SEM), energy dispersive X-ray (EDX), X-ray diffraction (XRD) and atomic force
microscopy (AFM) are performed to determine the morphological and compositional
structures. Electrocatalysis properties are evaluated by cathodic current-potential curves,
electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) in 1.0 M KOH
solution. Chronoamperometry (CA) and cycle tests are used for stability/durability of
electrocatalysts. Results show that a small onset potential of the porous Cu/Ni/CuZnePt is
obtained for HER. Exchange current density and polarization resistance are found to be
5.39 mA cm2 and 2.0 U cm2 at overpotential of 100 mV for porous Cu/Ni/CuZnePt,
respectively, indicating that Cu/Ni/CuZnePt is higher electrocatalytic properties than the others. Moreover, very low overpotentials at 10 and 40 mA cm2 are obtained on porous Cu/
Ni/CuZnePt compared with porous Cu/Ni/CuZneRu and Cu/Ni/CuZn. Porous Cu/Ni/CuZn
ePt also displays excellent stability/durability in test solution. The remarkable electrocatalysis properties of porous Cu/Ni/CuZnePt can be explained due to high porous structure, leaching of Zn from the deposit, intrinsic activity of Pt as well as changing in the
electronic structure. It should be considered that porous Cu/Ni/CuZnePt is of high corrosion resistance in test solution for 120 h, which makes it good candidate for HER.
Açıklama
Anahtar Kelimeler
Hydrogen production Electrocatalyst Electrocatalysis Water splitting
Kaynak
International Journal of Hydrogen Energy
WoS Q Değeri
Q2
