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Oxidation-Reduction Reactions

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Updated: Feb 22, 2026

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

Enhanced Electrocatalytic Oxygen Reduction on NiWO_x Solid Solution with Induced Oxygen Defects.

Meiqin Shi¹, Xue Tong¹, Wang Li¹

¹State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology , Hangzhou 310032, Zhejiang, China.

ACS Applied Materials & Interfaces

|September 21, 2017

Summary

This study introduces a novel nickel-tungsten oxide (NiWOx) solid solution with oxygen defects, enhancing platinum catalysts for oxygen reduction reactions in alkaline media, outperforming commercial alternatives.

Keywords:

NiWOx solid solution alkaline electrocatalysis oxygen defects oxygen reduction reaction transition metal

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Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

Oxygen reduction reaction (ORR) is crucial for energy conversion devices.
Developing efficient and cost-effective ORR catalysts is a major challenge.
Tungsten oxides with oxygen defects show promise for catalytic applications.

Purpose of the Study:

To synthesize and characterize a continuous solid solution of nickel-tungsten oxide (NiWOx) with abundant oxygen defects.
To evaluate the performance of platinum-supported NiWOx (Pt/NiWOx) as a catalyst for the oxygen reduction reaction (ORR) in alkaline media.
To elucidate the role of oxygen defects in NiWOx on the ORR catalytic activity.

Main Methods:

Solid-state synthesis using W18O49 precursor.
Characterization using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and X-ray absorption spectroscopy (XAS).
Electrochemical evaluation of Pt/NiWOx catalysts for ORR in alkaline medium.

Main Results:

Successfully prepared stable NiWOx solid solution nanoparticles retaining the W18O49 crystallographic phase.
Pt/NiWOx catalysts demonstrated significantly enhanced ORR performance compared to commercial Pt/C.
Abundant oxygen defects in the NiWOx solid solution were identified as the key factor for improved catalytic activity.

Conclusions:

The NiWOx solid solution is an effective promoter for platinum-based ORR catalysts.
The presence of oxygen defects in NiWOx is critical for superior electrocatalytic performance.
NiWOx offers a promising alternative support material for ORR catalysts in alkaline environments.