In situ nanopores enrichment of Mesh-like palladium nanoplates for bifunctional fuel cell reactions: A joint etching strategy

Ultra-low Ru doped MOF-derived hollow nanorods for efficient oxygen evolution reaction

“…41 It is notable that the binding energy of Co 2+ in Ru@CoFe/D-MOF-2 was negatively shifted to 0.6 eV, implying a lower charge state of Co sites. 25,26 For Fe 2p regions, a doublet at 711.9 eV and 725.5 eV corresponded well to Fe 2p 3/2 and Fe 2p 1/2 in CoFe-MOF-2, and low content of metallic Fe was also detected in Ru@CoFe/D-MOF-2 (Fig. 2b).…”

Ultrathin Pd‐Based Perforated Nanosheets for Fuel Cells Electrocatalysis

“…As a result, direct ethanol fuel cells (DEFCs) have attracted much attention in portable power devices for vehicles and electronics [90] . The EOR performances of Pd MNPs/C (Figure 2), Pd LMNPs/C, Pd NPs/C, and commercial Pd/C were evaluated at a scan rate of 50 mV s −1 in 0.1 M KOH containing 0.5 M ethanol for comparison [63] . The ECSAs for Pd MNPs/C, Pd LMNPs/C, Pd NPs/C, and Pd/C were calculated to be 114, 112.2, 106, and 61.2 m 2 g −1 , respectively.…”

“…The resulted multilayer Pd NPs with thickness of 17.5 nm were used as seeds and heated at 120 °C or 180 °C for 1 h to obtain two types of mesh-like nanoplates including Pd LMNPs with thickness of 13 nm (sparse nanopores) and MNPs with thickness of 6 nm (more nanopores) with escalating nanopores as illustrated in Figure 2e. [63] Figure 2f-h show the structural characterizations of Pd MNPs. Yang and co-workers reported the preparation of Pd fractal NSs (FNSs) with thickness of 1.19 nm using 16 mg Pd(acac) 2 , 30 mg PVP, 100 mg W(CO) 6 , and 60 mg oxalic acid in 10 mL DMF at 60 °C for 3 h in argon atmosphere as shown in Figure 2i.…”

Branch-Regulated Palladium–Antimony Nanoparticles Boost Ethanol Electro-oxidation to Acetate

“…Both the commercial deployment of DEFCs and the industrial implementation of (bio)­ethanol-based electrocatalytic processes for H 2 production or chemical synthesis, strongly depends on the efficiency, cost, and stability of the electrocatalyst used for the ethanol oxidation reaction (EOR). Pt and Pd catalysts have been demonstrated as the most efficient catalysts in an alkaline medium. − Among them, Pd displays comparable catalytic activities but better resistance to poisoning than Pt, and Pd is a more abundant element, thus having a lower cost. − Besides, to further improve catalytic activity toward the EOR and at the same time potentially reduce material costs, Pd is frequently alloyed with other elements such as Rh, Sn, Ni, Zn, and Pb. − Beyond reducing the total amount of Pd used, alloying elements can improve the electrocatalytic oxidation performance through three basic mechanisms: (i) electronic effect, when the added element modifies the electronic structure of active atoms; (ii) steric effect, when it blocks neighboring catalyst sites, preventing the strong binding of poison intermediates; and (iii) bifunctional effect, when the added atom directly participates in the oxidation reaction. , …”