Facile synthesis of N-doped porous carbon encapsulated bimetallic PdCo as a highly active and durable electrocatalyst for oxygen reduction and ethanol oxidation

Abstract

A facile synthesis of ultrafine PdCo bimetallic nanoparticles confined in N-doped porous carbon nanocapsules (PdCo@NPNCs) is presented here. The PdCo@NPNCs exhibit superior electrocatalytic activity and stability towards both the oxygen reduction and ethanol oxidation reactions.

Polymer‐Assisted Co‐Assembly towards Synthesis of Mesoporous Titania Encapsulated Monodisperse PdAu for Highly Selective Hydrogenation of Phenylacetylene

“…The surface Pd on bimetallic PdAu is heavily oxidized as reported previously . When supported on mTiO 2 , oxidized Pd species are likely reduced, leading to the formation of electron‐rich surface Pd sites .…”

“…[38] The surface Pd on bimetallic PdAu is heavily oxidized as reported previously. [39,40] When supported on mTiO 2 , oxidized Pd species are likely reduced, leading to the formation of electron-rich surface Pd sites. [41] We therefore deduce that this accounts for the enhanced catalytic activity in hydrogenation of phenylacetylene as compared with PdAu@mSiO 2 , which presumably enhances the hydrogen spillover without being detrimental to the selectivity.…”

Nanocatalysts for Electrocatalytic Oxidation of Ethanol

“…ZnO template-assisted electrodeposition optimal Pd/Co ratio,a nd hollow and porousstructure 2015 [138] PdCo coreduction synergistic effectfrom the uniques tructure and chemical composition:t hin carbon shelli nhibits particlea gglomeration and alloying with Co modification of the electronic structureo fP d 2017 [139] PdCu coreduction by NaBH 4 3D network, self-supporting, and electronic interactions 2015 [140] PdCu coreduction smaller size, more Pd active sites on the surface, and good synergistic effects 2016 [141] PdCu coreduction by CO ultrathin sheet structure, cleans urfacec lean feature, 3D structure,a nd synergistic effect 2017 [142] PdFe one-pot thermald ecompositiondownward shifted d-bandc enter,easily formed oxygen-containings pecies, and stabilizing effect from supports 2015 [143] PdGe coreduction balance between adsorption energies of CH 3 CO and OH on the catalystsurface and presence of vacanciesi nt he inactive sites 2015 [144] PdNi coreductionsynergistic effectofP dNi particles and rGO support2018 [145] Ni@PdNi electrodepositionand galvanic replacementr eaction bifunctional mechanism that alleviates surface CO poisoning 2018 [146] PdPb coreductionoptimal electronic and geometric effects,a nd stable chemical configuration2 017 [147] PdRu seed-mediated growth optimal Pd/Ru ratio and bifunctional mechanism 2015 [148] PdSn coreductioni nt he presenceo fs ize-and shape-directing agents exposureoffavorable facets 2016 [149] PtCo coreductioni nt he presenceo fs ize-and shape-directing agents presence of activet hreefold hollow sites on platinum-rich high-indexf acets 2016 [150] PtCo coreductionb ycontrolled thermal treatment promotion of partial oxidationo fe thanolover CÀCb ond cleavage Pt 3 Co with Pt skin 2017 [151] PtCu coreductiona td ifferent pH valuesmorphological tailoring 2016 [152] PtCu coreductionmonodispersion,s mall sizes (sub-5 nm), and polyhedral structures 2017 [153] PtIr coreductiondendriticstructures, surface state, and controlled electronic structure2016 [154] PtNi coreductionb yoleylamine synergistic electronic and facet effects2017 [155] PtPd coreductioni nt he presenceo fr GO optimal Pt/Pd ratio, synergistic effect, and ligand effect 2014 [156] PtPd coreductioni nt he presenceo fr GO dendriticstructure, synergistice ffect, and good dispersion of rGO 2014 [157] PtPd coreductioni nt he presenceo fg raphene optimal Pt/Pd ratio and morphology tuning 2014 [158] PtPd coreductionb yNaBH 4 electronic effectsand bifunctional mechanism 2014 …”

Self‐Assembly Synthesis of Mulberry‐Like Fe/N/S‐Doped Highly Porous Carbon Materials: Efficient and Stable Catalysts for Oxygen Reduction Reaction

“…Therefore various kinds of PDA‐based carbon materials or composites, such as core/shell, hollow or solid carbon spheres, nanosheets, nanotubes, Me‐N−C materials, etc. have been prepared by different methods …”

“…have been prepared by different methods. [25][26][27][28][29][30] Lu and co-workers developed a hydrothermal method for preparing uniform solid PDA colloidal spheres with particle size from 120 to 800 nm through direct self-polymerization. [31] Due to the excellent thermal stability and electrochemical activity, these PDA colloidal spheres were used as carbon precursor to yield N-doped carbon spheres, which were a promising platform for oxygen reduction reaction (ORR), i. e. an important reaction in many energy conversion and storage technologies such as fuel cells and metal-air batteries.…”