Atomic Layer Deposition of Electrocatalysts for Use in Fuel Cells and Electrolyzers

Atomic layer deposition of Pd nanoparticles on self-supported carbon-Ni/NiO-Pd nanofiber electrodes for electrochemical hydrogen and oxygen evolution reactions

“…To date, ALD has been used for a wide range of catalysis applications for different types of chemical reactions, because it allows the synthesis of monometallic [51,52], bimetallic [53], and core-shell [54,55] noble-metal NPs. ALD is a particularly suitable technique for depositing expensive precious metals, such as Pt, Au, Pd, and Ag, because it requires low amount of metals, thus making the process cost-effective [56,57]. ALD has been widely used to deposit noblemetal NPs on CNF electrodes for electrocatalytic applications [58][59][60], but only few studies have investigated its potential for preparing self-supported CNF electrodes for simultaneous HER and OER.…”

Overpotential analysis of alkaline and acidic alcohol electrolysers and optimized membrane-electrode assemblies

“…electrolysis of iso-propanol shows high anodic overpotentials at both acidic and alkaline polymeric electrolytes, suggesting that iso-propanol electrolysis is not a viable technology under the tested conditions. We assume that the high anodic overpotentials obtained with iso-propanol are mainly related to the formation of strongly adsorbed intermediates [44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60] .…”

“…This electrode was interfaced to the one side of Nafion and KOH doped-PBI membranes and served as the anode during methanol electrolysis in acidic and alkaline media, while using a commercial Pt/carbon cloth cathode. water electrolysers upon depositing Pt by ALD on carbon-based diffusion layers, which is typically attributed to the uniform structural characteristics of Pt due to the deposition technique 50,69 . We believe that in our case, the difference in performance is related to both the different Pt characteristics between the two anodes 70 (loading, particle size, particles geometry) and also to the open structure of the TiO2-Ti substrate which facilitates the transport of reactants and products [71][72] .…”

“…ALD is a thin-film deposition technique which has recently attracted much attention for the fabrication of electrocatalysts. ALD offers uniform dispersion of sizecontrollable catalyst nanoparticles over the entire surface of 3D substrates [50][51][52] .…”

Simultaneous hydrogen and oxygen evolution reactions using free-standing nitrogen-doped-carbon–Co/CoOx nanofiber electrodes decorated with palladium nanoparticles

“…44 Comparing with Pt and Au NPs, ALD of the Pd NP on the CNF electrode surface can enhance its electrochemical activity, improve chemical stability, and reduce the overpotential of HER and the overall cost. 45,46 As controlled ALD allows reducing the Pd NP size to atomic clusters or even single atoms, it could lead to a major reduction of the Pd NP mass on the electrode surface and enhance the electrode electrochemical activity towards HER/OER reaction. 27,47,48 However, the impact of the deposited layer thickness, heterojunctions, and nanointerfaces on the CNF electrocatalytic activity has not been thoroughly investigated yet.…”