Silver Nanoparticle/Multiwalled Carbon Nanotube Hybrid as an Efficient Electrocatalyst for Oxygen Reduction Reaction in Alkaline Medium

Lulu Guo, Li Xiang, Fujie Li, Xiaoteng Liu, Lei Xing, Degui Li, Zhihong Luo, Kun Luo

Research output: Contribution to journalArticlepeer-review

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Abstract

A facile approach is employed to synthesize Ag/MWNTs hybrids by the direct reduction of silver nitrate with presence of MWNTs, where Ag nanoparticles capped with tris(hydroxymethyl)phosphine oxide (d = 2.9 nm) are uniformly deposited on multi‐walled carbon nanotubes. The as‐synthesized Ag/MWNTs hybrids exhibit high catalytic activity toward oxygen reduction, which increases with the loading amounts of Ag nanoparticles. RDE and RRDE analyses further indicate that the Ag/MWNTs hybrids follow the same four‐electron pathway towards oxygen reduction reaction as the Pt/C catalyst, and the Ag/MWNTs hybrid (22.8 wt.%) manifests comparable catalytic activity to the 20% Pt/C catalyst, together with superior long‐term stability and methanol tolerance, demonstrating the potential application on direct methanol fuel cells as an effective oxygen reduction catalyst.
Original languageEnglish
Pages (from-to)2489-2496
JournalChemElectroChem
Volume6
Issue number9
Early online date7 May 2019
DOIs
Publication statusPublished - May 2019

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