Segmented Au/PtCo heterojunction nanowires for efficient formic acid oxidation catalysis

Recent Advances in Anode Electrocatalysts for Direct Formic Acid Fuel Cell‐II‐Platinum‐Based Catalysts

“…The optimized specific gravity and mass activity of the Au 23 /Pt 63 Co 14 HNWs were recorded to be 11.7 mA • cm À 1 Pt and 6.42 mA • mg À 1 Pt, respectively, which are roughly 48.7 and 32.1 times greater than those of commercial Pt/C. [131]…”

“…presented a new class of Au/PtCo heterojunction NWs (Au/PtCo HNWs) that boost FAOR activity and selectivity by generating segmented Au on 1D PtCo NWs. The optimized specific gravity and mass activity of the Au 23 /Pt 63 Co 14 HNWs were recorded to be 11.7 mA ⋅ cm −1 Pt and 6.42 mA ⋅ mg −1 Pt, respectively, which are roughly 48.7 and 32.1 times greater than those of commercial Pt/C [131] …”

Boosted formic acid electro-oxidation on platinum nanoparticles and “mixed-valence” iron and nickel oxides

“…The rst peak current (I d p ) at ∼0.3 V and the second peak current (I ind p ) at ∼0.65 V were credited to the direct oxidation of FA to CO 2 (dehydrogenation process) and the oxidation of CO produced from FA (dehydration process), respectively. 1,46 As shown in Fig. 5, the electrocatalytic behavior of the various modied electrodes toward FAO is determined by measuring the CVs in 0.3 mol L −1 FA (pH = 3.5) solution.…”

“…The quest for clean, long-lasting, and efficient energy conversion devices, such as proton exchange membrane fuel cells (PEMFCs), to address the concerns of rising energy consumption and pollution has attracted great attention. 1,2 Due to the safety and storage issues associated with hydrogen, researchers have focused on developing PEMFCs, utilizing small organic molecules (e.g., methanol, formic acid, and ethanol) as a fuel source. 3 Among these fuel cells (FCs), direct formic acid fuel cells (DFAFCs) use formic acid (FA, HCOOH) as a chemical energy source and operate with a high power density (∼271 mW cm −2 at 30 °C (ref.…”

“…[12][13][14] In this regard, DFAFCs have received great interest in recent decades with the objective of developing a high-efficiency catalyst along with the illustration of the associated oxidation mechanism. 1,15 Thanks to the pioneer work of Capon and Parson, who used differential electrochemical mass spectrometry (DEMS) and provided evidence for a dual path mechanism for formic acid electro-oxidation (FAO); 16 direct dehydrogenation (desirable) to yield CO 2 and indirect dehydration (undesirable) to produce CO intermediate species that is because of its strong adsorption, the Pt surface became poisoned. [16][17][18][19][20] The Pt surface tends to mechanistically catalyze FAO via the cleavage of the C-O and C-H bonds mostly at low potentials, whereas the O-H bond is quickly cleaved at high potentials.…”