Surface modulation of inorganic layer via soft plasma electrolysis for optimizing chemical stability and catalytic activity

Electrochemically Stable and Catalytically Active Coatings Based on Self-Assembly of Protein-Inorganic Nanoflowers on Plasma-Electrolyzed Platform

“…The inorganic platform itself, which mainly consists of γ-Al 2 O 3 , can catalyze the formation of OH• by the large number of − OH groups on its surface. 19,33 Furthermore, Cu 2+ in NCs can generate more radicals by a Fenton-like reaction mechanism: 34,35…”

“…These radicals attack the heteroatom ring of MB first, resulting in the splitting of the entire molecule into small fragments. 19,36 The inset of Figure 8c shows the change in η values of the flower-bed layers over multiple cycles. All of the present specimens show less than a ∼5% decrease in their η values, demonstrating the stability of the present material as a reusable catalyst system.…”

Optimization of Surface Properties of Plasma Electrolytic Oxidation Coating by Organic Additives: A Review

“…As such, Kamil et al [55] reported the soft plasma discharges developed in alkalinesilicate-electrolyte-containing complexing agents were useful to optimize the chemical stability and catalytic activity of an Al alloy coated via PEO. Three different complexing agents, such as complexing agents of nitrilotriacetic acid (NTA), ethylenediaminetetraacetic acid (EDTA), and diethylenetriaminepentaacetic acid (DTPA) were added to the alkalinesilicate electrolyte (0.11 M KOH and 0.033 M Na 2 SiO 3 ).…”

Hybrid Organic-Inorganic Materials on Metallic Surfaces: Fabrication and Electrochemical Performance

“…By means of PE, where the metallic substrate is reformed in a liquid electrolyte through plasma dischargeassisted electrochemical reactions under high electrical polarization, a thick IL grown on the substrate with strong adhesion to the substrate would be attained [16,17]. However, during PE, the high energy discharges are not only constructive for the growth of the IL responsible for its thickness, but also destructive in nature leaving micro-defects on the IL surface which might be detrimental to its structural integrity unless defect remediation were performed [18]. Introducing these defects as sites for the preferential adsorption of organic molecules represents a new hybrid concept to fabricate HOI materials on the metallic surface, aiming to improve their structural stability.…”

“…Introducing these defects as sites for the preferential adsorption of organic molecules represents a new hybrid concept to fabricate HOI materials on the metallic surface, aiming to improve their structural stability. This key concept relies on the condition where the hierarchical porous structure of IL act as a reservoir that allows local anchoring of organic moieties through donor-acceptor interactions depending upon the surface charge of the metal and electronic properties of the organic source [1,18]. Thus, unpaired electrons, polar functional groups, aromatic rings, and several heteroatoms (i.e, N, P, S) would preferably donate electrons to the unfilled d-or p-orbitals of the metal in the IL.…”