Surface science and electrochemical analysis of nickel foams

ACS Applied Materials & Interfaces
Michał GrdeńGregory Jerkiewicz

Abstract

Open-pore nickel (Ni) foams are characterized using surface science and electrochemical techniques. A scanning electron microscopy analysis reveals interconnected Ni struts that generate small and large pores of ca. 50 and 500 μm in size, respectively. An X-ray photoelectron spectroscopy (XPS) analysis of the surface-chemical composition of the Ni foams shows that there are oxidized and metallic sections within their surfaces despite being prepared by sintering in an oxidizing atmosphere at a high temperature and being stored in moist air. The ratio of the areas of oxidized and metallic sections is evaluated using XPS data. Chemical etching of the Ni foams results in removal of the native surface oxide/hydroxide without altering the three-dimensional structure; it also increases the roughness (R) of the surfaces of Ni struts giving rise to an increase in the electrochemically active surface area (Aecsa). Thermal treatment of Ni foams in an H2(g) atmosphere at 500 °C reduces the native surface oxide/hydroxide but does not increase R or Aecsa. Electrochemical behavior of the Ni foams is examined in 0.5 M aqueous KOH solution using cyclic-voltammetry (CV) and electrochemical impedance spectroscopy (EIS). As-received, chemically et...Continue Reading

References

May 4, 2005·Nature Materials·Antonino Salvatore AricòWalter van Schalkwijk
Jun 1, 1982·Talanta·J Wang, H D Dewald

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Citations

Jun 14, 2013·ACS Applied Materials & Interfaces·Huanwen Wang, Xuefeng Wang
Jun 13, 2013·ACS Applied Materials & Interfaces·Julia van DrunenGregory Jerkiewicz
Feb 7, 2017·ACS Applied Materials & Interfaces·Michael T Y PaulByron D Gates
Feb 11, 2015·Proceedings. Mathematical, Physical, and Engineering Sciences·David S HallBarry R MacDougall
Feb 14, 2017·Nano Convergence·Matthew J GiraJennifer R Hampton
May 31, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Tomasz MikolajczykWieslaw Wiczkowski
Jul 17, 2014·ACS Applied Materials & Interfaces·Julia van DrunenGregory Jerkiewicz
Jun 26, 2018·Environmental Science & Technology·Dianxun HouZhiyong Jason Ren
Nov 30, 2018·ACS Applied Materials & Interfaces·Stanislaw P Zankowski, Philippe M Vereecken
Jan 7, 2021·ACS Applied Materials & Interfaces·Audrey K TaylorByron D Gates
Sep 10, 2020·Environmental Science & Technology·Raúl A Márquez-MontesVictor Hugo Ramos-Sanchez

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