The graphene-supported palladium and palladium–yttrium nanoparticles for the oxygen reduction and ethanol oxidation reactions: Experimental measurement and computational validation

Surface-modulated palladium-nickel icosahedra as high-performance non-platinum oxygen reduction electrocatalysts

“…Fortunately, recent research has demonstrated that the surface modification of NCs is of great significance in ORR, since a balance between O 2 absorption/desorption can be achieved via changing the electronic structure of a core metal ( 15 , 17 , 23 ). However, the surface design of NCs should counterbalance two completely opposing effects; they are the relatively strong absorption energy of O 2 and reaction intermediates, as well as a relatively low coverage by unexpected oxygenated species and specifically absorbed anions ( 13 , 14 , 24 ). To be specific, insufficient amounts of new metals modified on the Pd NC surface might be ineffective in changing the electronic structure of Pd.…”

Effect of catalyst carbon supports on the oxygen reduction reaction in alkaline media: a comparative study

“…23 Recent developments on catalyst supports have been made on graphene derivatives, driven by its unique properties such as very high electronic and thermal conductivity, extremely high surface area (theoretically 2630 m 2 g À1 ) and high mechanical strength. 24 Although graphene has been proposed as catalyst support itself, 25 it cannot be produced for large-scale by micromechanical exfoliation from graphite. 26 The present study focuses on two graphene derivatives: graphene oxide (GO) and reduced-graphene oxide (rGO), which can be easily obtained from abundant graphite crystal using well-known oxidation methods, 27 followed by a reduction in the case of rGO.…”

PdAuCu Nanobranch as Self‐Repairing Electrocatalyst for Oxygen Reduction Reaction

“…[11] ii)A relatively strong adsorption energy of O 2 on the surface of catalyst is necessary; [12] as shown in the XPS results ( Figure S11), the incorporation of Cu oxide remarkably alteredt he electronic structure of Pd, and the negative shift of Pd 3d in PdAuCu-500th-HPT could therefore increase the electron density of Pd and strengthen the PdÀOb ond, making the Pd surface easily accessible for O 2 adsorption anda ctivation. [13] iii)T omakeaf ast OH À desorption, the catalysts hould not bind oxygenated intermediates species too strongly. [12] The Cu II oxide in PdAuCu-500th-HPT undergoes ar eductionp rocessp arallel to the reductiono fo xygen, the nonstoichiometric metastable copper oxide species formed during reduction is very active because of its superiora bility to transports urface lattice oxygen.…”