Synthesis of Pt-Ni/CNT Cathodic Catalyst and its Application in a PEM fuel Cell

Abstract

Abstract. This work reports the synthesis, characterization, and catalytic activity of Pt-Ni/CNT with a low platinum load to use as cathode electrocatalyst in PEMFC (proton-exchange membrane fuel cells). The synthesis of nickel particles on the carbon nanotubes surface was carried out by chemical reduction of a Ni(ethylenediamine) complex; after that, the galvanic displacement reaction was performed to platinum deposition onto Ni/CNT. The Pt-Ni/CNT was deposited by spray technique on a gas diffuser layer (GDL) and subsequently subjected to several potential cycles to promote Ni atoms migration. Finally, its catalytic activity was evaluated in a fuel cell.
 
 Resumen. En este trabajo, se reporta la síntesis, caracterización y evaluación catalítica del electrocatalizador Pt-Ni/CNT con bajo contenido de platino, empleado como electrocatalizador catódico en una celda de combustible tipo PEMFC (Celda de combustible de membrana de intercambio protónico). La síntesis de las partículas de níquel sobre la superficie de los nanotubos de carbono se llevó a cabo mediante la reducción química del complejo de Ni(etilendiamina) y posteriormente, se depositó platino sobre el material Ni/CNT mediante la reacción de desplazamiento galvánico. Se depositó una película de Pt-Ni/CNT sobre un difusor de gas mediante la técnica de esprayado y posteriormente fue sometido a diversos ciclos de potencial para promover la migración de los átomos de níquel y evaluar su actividad catalítica en una celda de combustible.

Progress of g‐C 3 N 4 and carbon‐based material composite in fuel cell application

“…CNT exhibit remarkable thermal conductivity across the long orientation of the CNT with lengths surpassing a few hundred microns. 93 L opez-Rosas et al 94 have synthesised a Pt-Ni/CNT cathodic electrocatalyst using ethylenediamine (EDA). TGA has been used to confirm the metallic content and thermal stability of synthesised materials (see Figure 6C).…”

“…Pt-Ni/ CNT samples were less thermally stable than Ni/CNT and CNT samples. 94 The adsorption of O molecules on Pt-Ni/CNT, and subsequent transfer to the carbon…”

“…The influence of CNT length on (A) thermal diffusivity as well as corresponding thermal conductivity, (B) electrical resistance as well as conductivity of CNT/BMI composites, 93 (C) Thermograms of CNT, Ni/CNT, as well as Pt-Ni/CNT materials, 94 (D) COOH-CNT/Epoxy TGA as well as pure CNT/Epoxy TGA with varied CNT percentage by weight 96 support, promotes faster oxidation of the CNT structure, converting it to CO 2 . 95 TGA was used by Hong et al 96 to analyze the thermal stability of the CNT composite, as seen in Figure 6D.…”

“…The influence of CNT length on (A) thermal diffusivity as well as corresponding thermal conductivity, (B) electrical resistance as well as conductivity of CNT/BMI composites, 93 (C) Thermograms of CNT, Ni/CNT, as well as Pt‐Ni/CNT materials, 94 (D) COOH‐CNT/Epoxy TGA as well as pure CNT/Epoxy TGA with varied CNT percentage by weight 96 …”

“…López‐Rosas et al 94 have synthesised a Pt‐Ni/CNT cathodic electrocatalyst using ethylenediamine (EDA). TGA has been used to confirm the metallic content and thermal stability of synthesised materials (see Figure 6C).…”