Synthesis of Pt/C from (NH4)2PtCl6 through Microwave- Assisted Synthesis: A particle size-controlled growth

Raghunandan Sharma, Yue Wang, Fan Li, Jessica Chamier, Shuang Ma Andersen*

*Corresponding author for this work

Research output: Contribution to conference without publisher/journalConference abstract for conferenceResearch

Abstract

We explore feasibility of ammonium hexachloroplatinate (NH4)2PtCl6, a rare example of a
water soluble and air stable platinum(IV) salt that is not hygroscopic, as a convenient and
economic platinum precursor for large-scale synthesis of the Pt supported on high surface
area carbon (Pt/C) electrocatalysts. The Pt/C electrocatalysts with ~20 wt.% Pt loading are
synthesized through a microwave assisted polyol synthesis approach using a mixture of
ethylene glycol (EG) and water as the media. A water-assisted control of Pt nanoparticle
size between ~2 and ~6 nm is demonstrated by varying either the H2O vol.% or the Pt
precursor concentration. A catalytic performance (in terms of electrochemical
surface area (ECSA) and the oxygen reduction reaction activity) competitive to that of the
state-of-the-art commercial Pt/C electrocatalysts has been demonstrated for the
electrocatalyst synthesized at the optimized parameters with an EG/water ratio of 3/7 v/v, a
reaction temperature of 140 oC, a reaction time of 150 s and a Pt concentration of 5 mM.
Electrochemical durability of the synthesized Pt/C electrocatalysts has been found to be
equivalent to the commercial counterpart. The study may be adopted for preparation of the
Pt/C electrocatalysts having electrochemical performance equivalent to the Pt/C catalyst
available commercially from a convenient and economic Pt precursor (NH4)2PtCl6.
Original languageEnglish
Publication dateJul 2021
Number of pages322
Publication statusPublished - Jul 2021
EventEFCF 2021 Low-Temperature Electrolysers, Fuel Cells & H2 Processing Research, Development & Application - https://www.efcf.com/2021, Lucerne & Virtual, Switzerland
Duration: 29. Jun 20212. Jul 2021
https://www.efcf.com/2021

Conference

ConferenceEFCF 2021 Low-Temperature Electrolysers, Fuel Cells & H2 Processing Research, Development & Application
Locationhttps://www.efcf.com/2021
Country/TerritorySwitzerland
CityLucerne & Virtual
Period29/06/202102/07/2021
Internet address

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