High-performance intermetallic PtCo oxygen reduction catalyst promoted by molybdenum

Design principles for the synthesis of platinum–cobalt intermetallic nanoparticles for electrocatalytic applications

“…43,44 Intermetallics often exhibit less metal dissolution, less ECSA loss, and better durability than their alloy forms under the same reaction conditions. 123,124 Furthermore, there is an ease in analyzing the composition of the near-surface region of intermetallic structures, 43,96 which help to develop more reliable surface models in the theoretical calculation of adsorption 111,125,126 and the mechanism study of a catalyst. 78,80,117 In this section, we discuss the correlation between the structural features and catalytic properties of Pt–Co intermetallic electrocatalysts, i.e.…”

“…9c and d), resulting in an enhancement in the ORR performance under both RDE and MEA testing conditions. 126 Single atoms of Co–N–C support may change the binding energy between the oxygen species and Pt surface, whereas direct electron transfer from PtCo to the Co–N–C support could result in the d-band shift of Pt. 130,131…”

Design strategies of Pt-based electrocatalysts and tolerance strategies in fuel cells: a review

“…In contrast, the current densities of Pt-based alloys are tens or even hundreds of times than that of commercial Pt/C based on the previous reports. 10–13 As an effective electrocatalyst, Pt-based alloys include Pt-based binary alloys, Pt-based multi-element alloys, and Pt-based high-entropy alloys. With the development of the technology, the following two strategies have been used to prepare a series of Pt-based electrocatalysts: (1) alloying Pt with a second element, including Ru, Pd, Co, Ni, Fe and Cu, could reduce the usage of Pt and enhance its catalytic performance.…”

Insights into the synergistic catalytic mechanism on the customized dual sites of an efficient ORR catalyst

“…1,2 Among them, PtCo alloys have been proven to be efficient ORR catalysts, free of Fenton reaction effect, and have applications in commercial fuel cell vehicles. 3 The coupling of Co atoms in the Pt lattice decreases its d-band center, further adjusting the metal–oxygen binding energy to a moderate value, thus accelerating the ORR rate. 4,5 For the most common zero-dimensional PtCo alloy catalysts, a large number of studies have been devoted to further enhancing the catalytic activity by introducing carbon carriers to prevent the agglomeration of the alloy nanoparticles.…”