Rhodium effects on Pt anode materials in a direct alkaline ethanol fuel cell

Abstract

The development of efficient catalysts for ethanol oxidation in alkaline medium requires an approach that avoids surfactant molecules from being adsorbed at active sites and decreasing the electrochemical performance of the direct ethanol fuel cell.

Selective Glycerol‐to‐glycerate Electro‐oxidation on Cerium‐modified Pt/C Nanocatalyst in an Alkaline Direct Alcohol Fuel Cell: Cogeneration of Energy and Value‐added Products

“…To ensure the replacement, about five times excess was used (φ = 5,5). [67] Counterion substitution slightly changed the yellowish color of the initial [PtCl 6 ] 2À solution due to the replacement of Cl À by Br À , generating [PtCl 6-x Br x ] 2À complex, where 0 � x � 6 [68] was formed according to Eq. 4:…”

“…The bromide anion (Br − ) solubilized in the solution replaced the counter ion in the metallic aqua‐complex, to provide a steric environment that acted as a capping agent helping to stabilize the metallic nanoparticles to be generated in the next step of the synthesis. To ensure the replacement, about five times excess was used ( ϕ =5,5) [67] . Counter‐ion substitution slightly changed the yellowish color of the initial [PtCl 6 ] 2− solution due to the replacement of Cl − by Br − , generating [PtCl 6‐x Br x ] 2− complex, where 0≤x≤6 [68] was formed according to Eq.…”

Direct Liquid Fuel Cells: A Research Progress and the State of the Art

“…Due to the strong adsorption capacity of CO on Pt surface, it can occupy the active site of Pt catalyst surface, thus reducing the catalytic activity of Pt, leading to serious poisoning of Pt catalyst. For this reason, Pt based metal alloy catalysts were prepared by adding a second metal (Ru [13], Au [14], Pd [15], Rh [16], Ir [17], Bi [18], Sn [19], Ni [20], Co [21] and Fe [22]) to Pt based catalysts to alleviate poisoning. Through the preparation of various Pt based alloy catalysts, the aggregation state and existing form of the catalysts are improved, and the catalytic activity is improved.…”

An FTIR Study of the Electrooxidation of C2 and C3 Alcohols on Carbon‐Supported PdxRhy in Alkaline Medium**

“…These authors found that acetate and carbonate ions emerged along all the applied potential range, at larger amounts than those obtained for Pd catalysts, which indicated the presence of an associative character regarding ethanol adsorption on the PdRh catalyst. Maksić et al [32] studied how Rh deposited onto polycrystalline Pd impacted EOR in alkaline medium. They noticed that Rh addition to the Pd catalyst accelerated the reaction via an electronic effect.…”