A general strategy for bimetallic Pt-based nano-branched structures as highly active and stable oxygen reduction and methanol oxidation bifunctional catalysts

Pt3Co@Pt Core@shell Nanoparticles as Efficient Oxygen Reduction Electrocatalysts in Direct Methanol Fuel Cell

“…[6] For example, Yang and coworkers have engineered a kind of nano-branched PtÀ M catalysts and proved their better catalytic performances for both oxygen reduction and methanol oxidation reactions. [7] Furthermore, the core@shell structure with a Pt-skin has the advantage of maintaining the alloying degree of the PtÀ M cores without deterioration of the electronic structure, which could benefit both the catalytic activity and lifetime of practical fuel cells. [8] Herein, we propose a simple and facile method to synthesize Pt 3 Co@Pt core@shell nanoparticles supported on porous graphitic carbon (Pt 3 Co@Pt/C) for electrocatalytic oxygen reduction in acidic solution (see Scheme 1).…”

“…In addition, embedding Pt with other metals, especially 3 d transition metals, such as Fe, Co and Ni, to form Pt−M bimetallic electrocatalysts has become the mainstream approach to reduce the catalysts’ cost and simultaneously improve the utilization of precious platinum [6] . For example, Yang and co‐workers have engineered a kind of nano‐branched Pt−M catalysts and proved their better catalytic performances for both oxygen reduction and methanol oxidation reactions [7] . Furthermore, the core@shell structure with a Pt‐skin has the advantage of maintaining the alloying degree of the Pt−M cores without deterioration of the electronic structure, which could benefit both the catalytic activity and lifetime of practical fuel cells [8]…”

Enhancement of oxygen reduction reaction activity by grain boundaries in platinum nanostructures

“…Platinum (Pt)-based nanocatalysts have attracted intensive interest due to their promising applications in clean energy industries [1][2][3][4][5][6][7]. Particularly Pt-based nanomaterials have been considered as the most effective catalyst for oxygen reduction reaction (ORR) and are employed widely in proton exchange membrane fuel cell applications [8][9][10][11][12][13].…”

Electrodeposition of Mesoporous Ni-Rich Ni-Pt Films for Highly Efficient Methanol Oxidation

“…Of the various types of fuel cells, direct methanol fuel cells (DMFCs) have received enormous attention, primarily due to the ease of manipulating and transporting methanol, a liquid substance that does not require special instrumentation or storage conditions. The other benefits of DMFCs include high energy density, high conversion efficiencies, negligible environmental impacts, and the ability to operate at low temperatures, the last of which significantly simplifies engineering problems [ 6 , 7 , 8 , 9 ].…”

“…As a partial solution, incorporating lower-cost transition metals to form stable bimetallic alloys—that is, Pt-M, in which “M” can be Fe, Co, Ni, or Pb, among others—has proven efficient, because it not only helps to reduce Pt consumption but also enhances the catalytic activity possible due to synergistic, electronic, and/or lattice-shrinking or straining effects. However, the chemical stability of Pt-M alloys, especially in acidic media, is generally lower than pure Pt due to the leaching of transition metals [ 7 , 12 , 20 ].…”