Collisions of suspended Prussian Blue nanoparticles with a rotating disc electrode

Investigations of Nanoparticle Suspensions of Prussian Blue and Its Copper Analogue: Amine Functionalization and Electrochemical Studies

“…The formation of films from suspended PB has been observed before; however, notably, those films only start to show redox response after multiple cycles or on rotating electrodes that faciliate mass transport, whereas we see the CuPBA response on the very first CV sweep. 25,26 Similarly, when a glassy carbon electrode was immersed in a CuPBA suspension in 1 M KCl for 60 s without any bias and a subsequent CV was run in fresh solution, a redox response consistent with a film was observed (see inset of Figure 2). Makowski et al reported a similar CuPBA film formation by dipping a glassy carbon electrode in a solution containing K 3 [Fe(CN) 6 ], CuSO 4 , and K 2 SO 4 for 1 h. 30b As seen in both the cyclic voltammograms in the inset of Figure 2, the open circuit potential (OCP) shows that there is a partial reduction of Fe(III) into Fe(II) in the CuPBA film.…”

“…A recent study by Holdynski et al reports on the electrochemistry of suspended PB nanoparticles using a rotating disk electrode, where sequential injections of PB yield stepwise increases in steady-state current flow. 25 In another study, Cisternas et al observe suspended PB forming a film on an electrode surface during cyclic voltammetry experiments. 26 In this study, we explored the electrochemical behavior of aqueous PB colloids as well as CuPBA.…”

“…Nonetheless, little has been reported to date on the ability to access the redox chemistry of PB colloids. A recent study by Holdynski et al reports on the electrochemistry of suspended PB nanoparticles using a rotating disk electrode, where sequential injections of PB yield stepwise increases in steady-state current flow . In another study, Cisternas et al observe suspended PB forming a film on an electrode surface during cyclic voltammetry experiments …”

Boosting Carbon Dioxide Reduction in a Photocatalytic Fuel Cell with a Bubbling Fluidized Cathode: Dual Function of Titanium Carbide

“…Similar to the fixed PFC reactors, oxidation and reduction reactions were taken place at the anode and the cathode of the fuel cell . Catalyst particles were fluidized by bubbling CO 2 gas in the cathodic solution, and electrons were transferred from the electrode to catalyst particles and then stored in catalysts for CO 2 RR through constant collision between fluidized catalyst particles and the current collector. , As a key process in the PFC, the frequent collision provides electrons for the fluidized catalyst particles, consequently CO 2 RR can be expanded into the whole solution. , Therefore, catalyst particles should not only have a good electrocatalytic activity to catalyze CO 2 RR but also a good capacitance property to store sufficient electrons . Previously, our work indicated that the Ti 3 C 2 catalyst showed high electricity generation and CO 2 reduction efficiency in our group due to its excellent catalytic activity for CO 2 reduction. , In addition, Ti 3 C 2 particles also show superior capacitance as widely used capacitor material. − Thus, Ti 3 C 2 particles exhibit bifunctional role of both capacitive and CO 2 catalytic activity and satisfy the requirement of the proposed fluidized-cathode for the CO 2 RR.…”

“…32,33 As a key process in the PFC, the frequent collision provides electrons for the fluidized catalyst particles, consequently CO 2 RR can be expanded into the whole solution. 34,35 Therefore, catalyst particles should not only have a good electrocatalytic activity to catalyze CO 2 RR but also a good capacitance property to store sufficient electrons. 36 Previously, our work indicated that the Ti 3 C 2 catalyst showed high electricity generation and CO 2 reduction efficiency in our group due to its excellent catalytic activity for CO 2 reduction.…”