A novel strategy for the synthesis of hollow Pt–Cu tetradecahedrons as an efficient electrocatalyst toward methanol oxidation

Abstract

Pt–Cu TNs can be simply achieved within a few minutes by an H+-assisted disproportionation reaction using Cu2O tetradecahedrons as the template. Due to its unique structural advantages, these Pt–Cu TNs exhibit extraordinary electrocatalytic performance toward MOR.

Single Co Atoms Implanted into N-Doped Hollow Carbon Nanoshells with Non-Planar Co-N4-1-O2 Sites for Efficient Oxygen Electrochemistry

“…Meanwhile the largest energy barrier (0.811 eV) for Co-N 4 -HCS occurred at the last step, step (11) of the desorption of *OH from the absorption site. Additionally, the negative free energy in steps ( 8), (9), and (10) for the Co-N 4 -HCS demonstrates that those reactions are spontaneously exothermic. Therefore, unlike Co-N 4 -G, no thermal activation process is needed in the Co-N 4 -HCS system.…”

Influence of Electrochemical Pretreatment Conditions of PtCu/C Alloy Electrocatalyst on Its Activity

“…Further, the behavior of the catalysts obtained after activation under various conditions was studied in the methanol electrooxidation reaction (MOR). Usually, when comparing the activity of platinum-containing catalysts in the alcohols' oxidation using voltammetry, several indicators are used, as follows: the onset potential (E onset ) [52][53][54]; the specific current value at the selected potential [53]; the maximum specific oxidation current (Imax) at the forward sweep of the potential [55,56]; as well as the amount of electricity consumed for the oxidation of alcohol (Q), which is calculated in the forward sweep of the potential [33]. The method of chronopotentiometry allows one to study the change in current value over time; usually, the values of the initial current (I initial ) and the current after experiment (I final ) are compared.…”

Ultrafine Pt nanoparticles supported on double-shelled C/TiO2 hollow spheres material as highly efficient methanol oxidation catalysts

“…With the booming development of ORR catalysts [2 , 3] , the relevant high-efficiency electrocatalysts for MOR are urgently needed for the application of fuel cells [4] . The MOR in acidic solution includes two main steps: 1) Adsorption of methanol molecules to conduct the catalytic behavior, and subsequently to produce CO and HCOO-intermediates; and 2) Oxidation of CO and HCOO-intermediates to CO 2 [5] . Normally, the adsorbed intermediates can occupy the active sites, which means poisoning the catalyst.…”

“…Normally, the adsorbed intermediates can occupy the active sites, which means poisoning the catalyst. Up to now, platinum (Pt)-based catalysts have the highest catalytic activity for MOR in both acidic [5] and alkaline media [6] . The limited supply and prohibitive cost of Pt restrict its widespread usage.…”

“…Recently, considerable attention has been attracted by hollow-structured materials that act as high-efficiency support for uniform distribution of noble metal particles [8 , 20] . More importantly, a hollow structure can reduce the use of precious metals and avoid the formation of close-packed structures [5] . However, hollow C/TiO 2 composites were seldomly used as catalyst support.…”