Pd/CuO–Ni(OH)₂/C as a highly efficient and stable catalyst for the electrocatalytic oxidation of ethanol

Abstract

A novel-Pd/CuO-Ni(OH)2/C catalyst with carbon black as support was successfully synthesized by hydrazine hydrate reduction and galvanic replacement strategies, subsequently tested for activity in the electrocatalytic oxidation of ethanol. The...

Pd Nanoparticle-Decorated Novel Ternary Bi2O2CO3-Bi2MoO6-CuO Heterojunction for Enhanced Photo-electrocatalytic Ethanol Oxidation

“…The previous literature investigated that the formation of ultrathin layer PdO and PdO/PdO 2 on the Pd metal surface significantly enhances EOR activity in alkali medium. ,, Krittayavathanum et al reported that the deposition of the thin PdO layer on Pd easily binds ethanol and its intermediates, leading to high current density, and the decline in current density with increasing cycling is due to the higher amount of PdO deposition on the Pd surface, activity similar to that of the bulk PdO . Therefore, our observations agree well with the previous results. ,,− …”

“…In this figure, the first cycle appears for the CO oxidation peak, and in the second scan, this peak disappears because of the complete removal of carbon monoxide from the catalyst surface. , The peak potential of CO oxidation is −0.126, −0.253, and −0.208 V (vs SCE) for Pd/BM-BOCC, Pd/CuO, and Pd/BM-BOCC catalysts, respectively. The more negative shift of the CO oxidation peak potential of Pd/CuO indicates that CuO doping on Pd and Pd/BM-BOC catalysts can easily remove the CO intermediates during the EOR by the following reaction CO ads + OH ads → CO 2 + normalH 2 normalO …”

“…In the dark, ethanol initially adsorbs on Pd-M surfaces; then, stepwise dehydrogenation produces acetyl (adsorbed) intermediates. On the other hand, Pd-M-OH ads is produced by hydroxylation on Pd-M, which combines with acetyl intermediates to give the partial oxidation product of EOR, i.e., acetate in alkali by the C2 pathway. ,, In the poisoning pathway, CH 3 CO ads decomposes to give carbonate, with the complete oxidation of the EOR with the rupture of the C–C bond by the C1 pathway shown in Scheme ,,,, …”

Nickel Hydroxide‐Supported Ru Single Atoms and Pd Nanoclusters for Enhanced Electrocatalytic Hydrogen Evolution and Ethanol Oxidation

“…In view of previous works in our group on the regulation of precious metals and hydroxides, [36,37] the rational combination of Pd, Ru, and transition metal hydroxides species may provide a promising strategy for the design of advanced functional electrocatalysts with outstanding activity and favorable toxicity resistance. Herein, we report a universal method for the rational design of Pd x Ru y /Ni(OH) 2 /C with different Pd/Ru ratios (x:y is the atomic ratio) with Pd nanoclusters, Ru single atoms anchored at the defective sites of Ni(OH) 2 for accelerating HER and EOR reactivity in alkaline medium.…”

Combining surface chemical functionalization with introducing reactive oxygen species boosts ethanol electrooxidation

“…As is well known, the small diameter of the arc resistance implies the smaller resistance of charge transfer and the fast reaction rate. 10,37 As presented in Fig. 6B, the impedance arc diameters of the tested catalysts are as follows Pd-CeO 2−x /FGS < Pd-CeO 2−x /GS < Pd/FGS < Pd/GS < Pd/C.…”