Achieving superior methanol oxidation electrocatalytic performance by surface reconstruction of PtNi nanoalloys during acid etching process

Abstract

Developing and designing highly active and robust catalysts for methanol oxidation reaction is imperative towards the commercialization process of direct methanol fuel cells. Herein, a Pt-Ni alloy catalyst (Pt1.5Ni-NGA) with...

A low Pt-loaded electrode electrochemically synthesized from bulk metal for electrocatalytic applications

“…25,26 According to the d-band theory, the transfer of an electron to Pt reduces its d-band center associated with Fermi energy levels, reducing the adsorption of toxic intermediates to the Pt active site during ethanol fuel oxidation, thus resulting in lower binding energy between Pt and the adsorbed toxic intermediate (e.g., CO), and the shi of the Pt binding energy to lower values decreases its d-band center, thus improving its catalytic performance for methanol oxidation. [27][28][29] The SEM images of the Pt/WO 3 electrode (Fig. S2 †) show that numerous tiny Pt/WO 3 particles constitute a 3D porous structure on the surface of the W matrix.…”

“…5f; Table S2 †). 26,29,[37][38][39][40][41][42][43][44][45][46][47][48][49][50] The Pt/WC 1−x /WO 3 electrode showed excellent catalytic performance not only in methanol aqueous solution, but also in ethylene glycol and propanetriol solutions (Fig. S11 †).…”

“…, CO), and the shift of the Pt binding energy to lower values decreases its d-band center, thus improving its catalytic performance for methanol oxidation. 27–29…”

Nitrogen-doped carbon nanotubes embedded with nitrogen-doped carbon black anchoring Pd nanocrystals to boost ethanol electrooxidation

“…4A-C). 25,26 Benefiting from the globular NCB embedded in the interspaces between carbon nanotubes, the Brunauer-Emmett-Teller (BET) specific surface area value of Pd/ NCB@NCNTs-2 was determined to be as high as 129.9 m 2 g −1 , which was larger than those of Pd/NCB (87.7 m 2 g −1 ) and Pd/ NCNTs (116.0 m 2 g −1 ), respectively. Moreover, the Barrett-Joyner-Halenda (BJH) pore size distribution curves further confirm the hierarchical porous structure with large mesopores and tiny macropores, as well as small mesopores and micropores for the as-prepared catalysts (Fig.…”

Manipulating electron redistribution in platinum for enhanced alkaline water splitting kinetics

“…While noble metal-based electrocatalysts such as Pt and RuO 2 are acknowledged for their superior performance, their widespread application is limited by their scarcity and suboptimal activity. [9][10][11] To overcome these shortcomings, the design and synthesis of low Pt content catalysts with high catalytic performance have emerged as a primary strategy. Consequently, selecting support materials with strong electrochemical properties to effectively modulate the electronic properties of Pt through interface engineering, 12,13 construction of heterostructures, 14,15 and hybridization engineering 16 are promising approaches to enhance the catalytic activity of low precious metal content catalysts.…”