2018
DOI: 10.1155/2018/4657040
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Bifunctional Tailoring of Platinum Surfaces with Earth Abundant Iron Oxide Nanowires for Boosted Formic Acid Electro-Oxidation

Abstract: To expedite the marketing of direct formic acid fuel cells, a peerless inexpensive binary FeOx/Pt nanocatalyst was proposed for formic acid electro-oxidation (FAO). The roles of both catalytic ingredients (FeOx and Pt) were inspired by testing the catalytic performance of FAO at the FeOx/Au and FeOx/GC analogies. The deposition of FeOx proceeded electrochemically with a post‐activating step that identified the catalyst’s structure and performance. With a proper adaptation for the deposition and activation proc… Show more

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Cited by 17 publications
(12 citation statements)
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“…Mohammad and co-workers reported a binary FeO x /Pt nanoanode for formic acid electro-oxidation and proposed that the catalyst's activation, conducted through a surface reconstruction for the Pt surface sites, makes the facets favourable for oxidation. 37 In another example, PtFe nanodendrites with high-index facets showed higher reactivity for oxygen reduction. 38 Very recently, Guo and co-workers 39 fabricated ultrafine Pt–Fe nanowires for the oxidation of ethylene glycol and glycerol, and their activity was 3.9 and 2.5 times greater than that of commercial Pt/C, respectively.…”
Section: Introductionmentioning
confidence: 99%
“…Mohammad and co-workers reported a binary FeO x /Pt nanoanode for formic acid electro-oxidation and proposed that the catalyst's activation, conducted through a surface reconstruction for the Pt surface sites, makes the facets favourable for oxidation. 37 In another example, PtFe nanodendrites with high-index facets showed higher reactivity for oxygen reduction. 38 Very recently, Guo and co-workers 39 fabricated ultrafine Pt–Fe nanowires for the oxidation of ethylene glycol and glycerol, and their activity was 3.9 and 2.5 times greater than that of commercial Pt/C, respectively.…”
Section: Introductionmentioning
confidence: 99%
“…Next, the deposited iron was activated in 0.2 mol L −1 NaOH aqueous solution at −0.5 V for 10 min, where iron oxide nanorods (nano-FeO x ) were formed. 45,46 To easily recognize the sequencing of the different catalytic ingredients and the post-treatment of the catalyst, abbreviations related to their developments were assigned. For instance, the a-FeO x /NiO x /Pt catalyst referred to the direct deposition of nano-NiO x onto the bare-Pt substrate followed by its passivation and activation.…”
Section: Methodsmentioning
confidence: 99%
“…and ternary catalysts such as PtM1M2 (M1M2 = RuAu, 34 PdCu, 35 CuFe, 36 SnBi, 6 AuCu 37 and BiPd 7 ). Furthermore, when modifying Pt surfaces with transition metal oxide nanostructures (MO x ), such as NiO x , 38,39 CoO x , 40 TiO x , 41 MnO x , 42,43 Cu 2 O, 44 FeO x , 45,46 etc. , the catalytic improvement achieved toward the FAOR was motivated by the so-called “bi-functional effect”, where the required oxygen atmosphere could easily be supplied by non-precious metal/s to facilitate the CO stripping at low overpotentials.…”
Section: Introductionmentioning
confidence: 99%
“…The following two strategies have been used: (1) Pt is coupled with other metals such as Ni [23][24][25][26], Au [8,27], Bi [28,29], Sb [30], and Rh [31], to prevent CO adsorption on the Pt surface through so-called ensemble and electronic effects, and (2) oxidative removal of adsorbed CO from the Pt surface is facilitated at low potentials by enriching the surface with oxygen-containing species via a bifunctional mechanism. This may be achieved by alloying Pt with oxophilic transition metals or metal oxides, such as NiO x [32][33][34][35], CoO x [32], Cu 2 O [36], FeO x [37], MnO x [38,39], and SnO 2 [40]. The presence of oxophilic materials, including Ni-oxy species, in the catalyst composition can assist with the electrochemical dissociation of water to form OHions at a more negative potential than that required for OHto be formed in the presence of bare Pt [32,[41][42][43].…”
Section: Introductionmentioning
confidence: 99%