Biomimetic Synthesis of an Ultrathin Platinum Nanowire Network with a High Twin Density for Enhanced Electrocatalytic Activity and Durability

Abstract

Strukturverstärkte katalytische Aktivität: Ein Netzwerk aus mehrfach verzwillingten Platinnanodrähten wirkt als effektiver Elektrokatalysator (siehe Bild). Das Material hat eine größere elektrochemisch aktive Oberfläche und zeigt eine deutlich höhere Aktivität in der Sauerstoffreduktion und Methanoloxidation als kommerzielle Pt/C‐Katalysatoren.

A Highly Active Star Decahedron Cu Nanocatalyst for Hydrocarbon Production at Low Overpotentials

“…[19][20][21][22][23][24][25] Icosahedral and decahedral noble metal NPs (Ag, Au, Pt, and Pd) have been reported, [20][21][22][23][24][25] however, synthesis of multiple-twinned Cu NPs without rod structures has remained a challenge, due to the high reactivity and oxidation tendency of Cu. [19][20][21][22][23][24][25] Icosahedral and decahedral noble metal NPs (Ag, Au, Pt, and Pd) have been reported, [20][21][22][23][24][25] however, synthesis of multiple-twinned Cu NPs without rod structures has remained a challenge, due to the high reactivity and oxidation tendency of Cu.…”

Thermal Effect and Rayleigh Instability of Ultrathin 4H Hexagonal Gold Nanoribbons

“…In the past decade, various ultrathin metallic nanowires with a diameter of less than 10 nm have been synthesized as a new kind of one-dimensional (1D) nanomaterial, which have shown unique physical and chemical properties with various promising applications. [1][2][3][4][5][6][7][8][9] In particular, ultrathin gold (Au) nanostructures are considered one of the most promising candidates for future nanoelectronics applications [10][11][12][13][14] owing to their excellent thermal stability, electrical and mechanical properties, and chemical inertness. Recently, ultrathin Au nanoribbons (NRBs) with an unusual metastable hexagonal (4H) phase, 15 unlike normal Au with face-centered cubic (FCC) phase, [1][2][3][4] have been synthesized and possess promising plasmonic and catalytic applications such as electrocatalytic hydrogen evolution reaction.…”

Platinum Multicubes Prepared by Ni2+‐Mediated Shape Evolution Exhibit High Electrocatalytic Activity for Oxygen Reduction

“…[9,10] Nevertheless,the interlaced (111)-(100) Pt surface at the nanoscale is found to help enhance the ORR activity, most likely because of as ynergetic effect between different facets. [12][13][14][15][16][17] Despite the common perception of superior ORR activities for Pt high-index facets relative to {100} facets,itremains an open question as to whether it is feasible to achieve high ORR performance on Pt nanocrystals having al arge {100} surface coverage.H erein, we demonstrate the synthesis of an ovel Pt-branched structure,m ulticube,w hose surface is mostly enclosed by {100} facets but contains asmall portion of high-index facets at the junction area between the adjacent cubic components.Such aunique structure exhibits strikingly high ORR performance in terms of activity (E 1/2 and current density) and durability,a nd nearly achieves the activity reported for Pt nanocrystals enriched with as tepped surface. [9][10][11] Fort his reason, tremendous efforts have been made to construct high-index facets on Pt nanocrystals for ORR studies.…”