Induction and pore-formed stages in Al2Au’s dealloying process in HCl solutions
Source abstract
Abstract
Abstract Two stages, induction stage and pore-formed stage, were distinguished in Al2Au’s dealloying process in HCl solutions by OCP, SEM and XPS characterization. In induction stage, the Au state with binding energy 85.4 eV (labelled as Al2Au (I)) was transformed into the state 84.7 eV (Al2Au (II)); in pore-formed stage, nanoporous structure started to be formed, Al2Au (II) and residual Al2Au (I) were transformed into the state 83.7 eV (pure Au). Multi-resolution analysis on OCP noise revealed that the induction stage and pore-formed stage undergo different corrosion modes: the former is local corrosion and the latter is global corrosion.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nanoporous metals and alloys · Copper-based nanomaterials and applications · Electrocatalysts for Energy Conversion
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (46)
Show source-provided references
1. Fe2O3 nanoporous network fabricated from Fe3O4/reduced graphene oxide for high-performance ethanol gas sensor10.1016/j.snb.2017.09.154 ↗
2. Nanoporous metal by dealloying for electrochemical energy conversion and storage10.1557/mrs.2017.300 ↗
3. Nanoporous metals for catalytic and optical applications10.1557/mrs2009.156 ↗
4. Nanoporous plasmonic metamaterials10.1002/adma.200701899 ↗
5. Gold catalysts: nanoporous gold foams10.1002/anie.200602484 ↗
6. Characteristic features of alloy polarization curves10.1016/0010-938X(83)90092-6 ↗
7. Corrosion micromorphology of noble metal alloys and depletion gilding10.1038/282597a0 ↗
8. Evolution of nanoporosity in dealloying10.1038/35068529 ↗
9. Formation of ultrafine nanoporous gold related to surface diffusion of gold adatoms during dealloying of Al2Au in an alkaline solution10.1016/j.scriptamat.2009.10.018 ↗
10. Fabrication and characterization of nanoporous gold composites through chemical dealloying of two phase Al-Au alloys10.1039/b904052h ↗
11. Glass formability and the Al–Au system10.1080/14786435.2011.630692 ↗
12. Al-Au (Aluminum-Gold)10.1007/s11669-005-0098-0 ↗
13. An Atomistic Description of Dealloying porosity evolution, the critical potential, and rate-limiting behavior10.1149/1.1784820 ↗
14. Dealloying below the critical potential10.1149/1.1838046 ↗
15. The effects of potential and kinetic parameters on the formation of passivating noble metal rich surface layers during the selective dissolution of binary alloys10.1016/0010-938X(96)00015-7 ↗
16. Fundamental aspects of the corrosion of alloys10.1016/S0010-938X(97)00016-4 ↗
17. The dealloying critical potential10.1149/1.1492288 ↗
18. Electrochemical noise analysis (ENA) for active and passive systems in chloride media10.1016/S0013-4686(01)00643-0 ↗
19. Analysis of pitting corrosion behavior of pure Al in sodium chloride solution with the wavelet technique
20. Electrochemical noise analysis of pitting corrosion of type 304L stainless steel10.5006/1003 ↗
21. Affection of Cu content on the phase evolution during the dealloying of Ag-Cu alloys using electrochemical noise with Hilbert spectra analysis10.1016/j.matlet.2016.07.116 ↗
22. An integrated approach in the time, frequency and time-frequency domain for the identification of corrosion using electrochemical noise10.1016/j.electacta.2016.11.018 ↗
23. A theory for multiresolution signal decomposition: the wavelet representation10.1109/34.192463 ↗
24. Multiresolution approximations and wavelet orthonormal bases of L2(R)
25. Orthonormal bases of compactly supported wavelets10.1002/cpa.3160410705 ↗
26. Capillary puddle vibrations linked to casting-defect formation in planar-flow melt spinning10.1007/s11663-006-0029-4 ↗
27. On determination of the period of lattice parameter modulation from satellite spots spacing in electron diffraction pattern10.1007/BF01605306 ↗
28. Effects of spin orbital coupling on atomic and electronic structures in Al2Cu and Al2Au crystal and liquid phases via ab initio molecular dynamics simulations10.1016/j.jallcom.2014.06.005 ↗
29. Influence of anion species on electrochemical dealloying of single-phase Al2Au alloy in sodium halide solutions10.1039/c2ra20087b ↗
30. Effect of second phases on the corrosion behaviour of wrought Mg–Zn–Y–Zr alloy10.1016/j.corsci.2010.02.017 ↗
31. XPS study of the surface chemistry of conventional hot-dip galvanised pure Zn, galvanneal and Zn-Al alloy coatings on steel10.1016/S1359-6454(03)00408-7 ↗
32. XPS study from a clean surface of Al2O3 single crystals10.1016/j.proeng.2018.02.081 ↗
33. Oxidation of Al-Au intermetallics and its consequences studied by x-ray photoelectron spectroscopy10.1557/JMR.2008.0161 ↗
34. High-resolution valence band XPS studies of thin film Au-Al alloys10.1016/S0368-2048(01)00234-1 ↗
35. Electronic structure of aluminum and aluminum-noble-metal alloys studied by soft-x-ray and x-ray photoelectron spectroscopies10.1103/PhysRevB.16.750 ↗
36. Corrosion behavior of monophasic and multiphasic Al50Au50 ribbons in AlCl3 + HCl solution10.1016/j.corsci.2019.108398 ↗
37. Comparison of polynomial fitting and wavelet transform to remove drift in electrochemical noise analysis10.1179/147842208X338956 ↗
38. Electrochemical noise analysis for estimation of corrosion rate of carbon steel in bicarbonate solution10.1016/S0010-938X(03)00031-3 ↗
39. Corrosion of the component phases presents in high copper dental amalgams. Application of electrochemical impedance spectroscopy and electrochemical noise analysis10.1016/j.corsci.2004.07.004 ↗
40. Nanoporous metals with controlled multimodal pore size distribution10.1021/ja035318g ↗
41. Preparation of hierarchical porous metals by two-step liquid metal dealloying10.1016/j.scriptamat.2017.08.038 ↗
42. Noise analysis applied to electrochemical systems10.5006/1.3293585 ↗
43. Monitoring of carbon steel corrosion by use of electrochemical noise and recurrence quantification analysis10.1016/j.corsci.2016.07.009 ↗
44. Pitting mechanism on an austenite stainless steel nanocrystalline coating investigated by electrochemical noise and in-situ AFM analysis10.1016/j.electacta.2008.06.076 ↗
45. Study on the corrosion behavior of reinforcing steel in cement mortar by electrochemical noise measurements10.1016/j.electacta.2006.11.015 ↗
46. Electrochemical noise studies of the corrosion behaviour of lead anodes during zinc electrowinning maintenance10.1016/j.electacta.2010.06.005 ↗