Revealing the Effect of Surface Composition on Multiwalled Carbon Nanotubes Supported Pt‐Fe Alloy Electrocatalysts for Methanol Oxidation Performance

Abstract

The designs of efficient and inexpensive Pt-based catalysts for methanol oxidation reaction (MOR) are essential to boost the commercialization of direct methanol fuel cells. Here, the highly catalytic performance PtFe alloys supported on multiwalled carbon nanotubes (MWCNTs) decorating nitrogen-doped carbon (NC) have been successfully prepared via co-engineering of the surface composition and electronic structure. The Pt 1 Fe 3 @NC/MWCNTs catalyst with moderate Fe 3 + feeding content (0.86 mA/mg Pt ) exhibits 2.26-fold enhancement in MOR mass activity compared to pristine Pt/C catalyst (0.38 mA/mg Pt ). Furthermore, the CO oxidation initial potential of Pt 1 Fe 3 @NC/MWCNTs catalyst is lower relative to Pt/C catalyst (0.71 V and 0.80 V). Benefited from the optimal surface compositions, the anti-corrosion ability of MWCNT, strong electron interaction between PtFe alloys and MWCNTs and the N-doped carbon (NC) layer, the Pt 1 Fe 3 @NC/MWCNTs catalyst presents an improved MOR performance and anti-CO poisoning ability. This study would open up new perspective for designing efficient electrocatalysts for the DMFCs field.

Studies on Structural Changes of Modified MWCNTs: Material for Electrochemical Monitoring of Antiviral Drug in Human Serum Samples

“…[4][5][6] Electrochemical detection based on solid-state electrochemistry has had incomparable usefulness in terms of large signal output and high sensitivity. [7][8][9] There are several conductive solid-state nanomaterials that have been employed for electrochemical monitoring, including metal-organic framework (MOF), [10] graphene, [7] carbon nanotubes (CNTs), [11][12][13] and metal oxides. [14] Among all, CNTs have drawn extensive attention owing to their high mechanical strength, high surface-to-volume ratio, high chemical stability, and extraordinary electrical and thermal conductivity for the construction of electrochemical nanomaterials.…”