Sirlon F. Blaskievicz, Ivo F. Teixeira, Lucia H. Mascaro
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Evaluation of the photoelectrochemical properties of mono and dual single-atom catalysts
Herein, we prepared poly(heptazine imide) (PHI), a layered structure of carbon nitride material containing sodium cations that were later exchanged, allowing us to obtain single-atom catalyst (SAC) sites of nickel, cobalt, and iron. In addition, combinations among these metals (NiCo, NiFe, and CoFe) were evaluated as dual single-atom catalysts (DSAC). The samples containing transition metal presented a photocurrent response far superior to the unmodified Na-PHI. The maximum photocurrent obtained was for the sample NiCo-PHI in alkaline media, being ~ 70 µA cm−2 at 1.2 V vs. RHE; this value was higher than both Ni-PHI and Co-PHI combined, indicative of a cooperative effect in the DSAC sample. Lastly, all samples containing transition metal, when studied in acidic media, presented both cathodic and anodic photocurrent indicating a bifunctionality potential for application in both reduction and oxidation of water.
期刊介绍：
The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry.
The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces.
The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis.
The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.
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