AuPt Nanoparticles/ Multi-Walled carbon nanotubes catalyst as high active and stable oxygen reduction catalyst for Al-Air batteries

Zhihong Luo,Liankun Yin,Li Xiang,Terence Xiaoteng Liu,Zhou Song,Yibing Li,Li Zhou,Kun Luo,Kai Wu,Jianjie Jiang

doi:10.1016/j.apsusc.2021.150474

Abstract

A series of AuPt nanoparticles supported on multi-walled carbon nanotubes (AuxPt/MWNTs) catalysts with ultrafine distribution (d ≈ 3.0 nm) were synthesized for Al-air battery cathode to enhance the oxygen reduction reaction. Among them, Au0.67Pt/MWNTs catalyst with metal loading of 10.2 wt% (Au:4.1 wt%, Pt:6.1 wt%) exhibited a superior ORR catalytic activity and competitive durability to 20 wt% Pt/C catalyst. When applied as Al-air battery, appropriate increasing Au loading encourage better battery performance. Au1.68Pt/MWNTs with 8.95 wt% of Au and as little as 5.3 wt% Pt content exhibit larger specific capacity (921 mAh g−1) and power density (146.8 mW cm−2) as well as better durability than 20 wt% Pt/C catalyst when it is assembled as cathode in Al-air battery.

Highlights

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The results indicate of triphenylphosphine oxide (THPO) as the capping molecule on the AuxPt NPs, which is normally generated from the cleavage of THPC in alkaline solutions [31]. 3.2 Electrochemical oxygen reduction reaction (ORR) performance
AuxPt/MWNTs catalysts were synthesized by a facile one-pot method, where the ultrafine AuxPt NPs capped with tris(hydroxylmethyl)phosphine oxide (THPO) were uniformly deposited on the MWNTs substrate in an average size of ~3.0 nm

Summary

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