Flower-like carbon supported Pd–Ni bimetal nanoparticles catalyst for formic acid electrooxidation

High Active PdSn Binary Alloyed Catalysts Supported on B and N Codoped Graphene for Formic Acid Electro-Oxidation

“…As is shown in Figure 5, the current densities of all the catalysts rapidly decrease at the initial stage, and then they gradually decay and reach a pseudo-steady state. This phenomenon is quite similar to those of other Pd-based catalysts [38,42], suggesting the same poisoning mechanism of the intermediate species accumulated on the catalysts toward the electrochemical oxidation of HCOOH. The pseudo-steady current density of 3Pd1Sn/BN-G reaches 12.00 mA cm −2 , which is much larger than the counterpart catalysts 4Pd1Sn/BN-G (8.87 mA cm −2 ), 2Pd1Sn/BN-G (7.57 mA cm −2 ), 1Pd1Sn/BN-G (6.63 mA cm −2 ), Pd/BN-G (4.87 mA cm −2 ), 3Pd1Sn/G (4.01 mA cm −2 ) and Pd/G (2.49 mA cm −2 ).…”

“…The electro-catalytic performances towards formic acid electro-oxidation for all the samples were tested by the CV at a scan rate of 50 mV s −1 in 1 M HCOOH with 0.5 M H 2 SO 4 , and the results are illustrated in Figure 4. It is generally accepted that the electrooxidation of formic acid follows a dual-pathway mechanism [8,38]. One is a dehydrogenation path which directly produces CO 2 by reaction (2), and the other is a dehydration path which makes CO 2 by multi-step reactions (3)- (5 dual-pathway mechanism [8,38].…”

“…It is generally accepted that the electrooxidation of formic acid follows a dual-pathway mechanism [8,38]. One is a dehydrogenation path which directly produces CO 2 by reaction (2), and the other is a dehydration path which makes CO 2 by multi-step reactions (3)- (5 dual-pathway mechanism [8,38]. One is a dehydrogenation path which directly produces CO2 by reaction (2), and the other is a dehydration path which makes CO2 by multi-step reactions (3−5).…”

PdNi/N-doped graphene aerogel with over wide potential activity for formic acid electrooxidation

“…Thus, GAs are advantageous over pristine graphene, having the 2D structure, in terms of efficient ion and molecule transport and diffusion and large surface area [18,19]; thus, they might be a suitable support for advanced Pd-based catalysts. Moreover, oxophilicity is desirable in Pd-based catalysts because the easy generation of oxygen-containing species prevents the accumulation of poisoning intermediates [20,21]. The Pd-Ni alloy is an active phase for formic acid oxidation because of its anti-poisoning ability, which is improved by the oxophilicity of Ni [22,23].…”

Structure–Reactivity Effects of Biomass‐based Hydroxyacids for Sustainable Electrochemical Hydrogen Production

“…The rest of the reaction products (14.7 %) can be ascribed to a few unassigned HPLC peaks, and it is reasonable to assume that some CO 2 (carbonate) can also be formed by oxidation of formate or other reaction intermediates. Formate was identified as one of the GA oxidation products and its oxidation to CO 2 has been widely reported with Pd‐based electrocatalysts [70,71] . The GA oxidation certainly follows a more complex reaction mechanism than the LA oxidation and proposed pathways for the detected products are represented in Figure 9 based on previous reports in the literature from the oxidation of similar species such as GA, glucose or glycerol [40,72–74] .…”