Kumar, Sachin;
Yoyakki, Athira;
Pandikassala, Ajmal;
Soni, Roby;
Kurungot, Sreekumar;
(2023)
Pt-Anchored-Zirconium Phosphate Nanoplates as High-Durable Carbon-Free Oxygen Reduction Reaction Electrocatalyst for PEM Fuel Cell Applications.
Advanced Sustainable Systems
, 7
(2)
, Article 2200330. 10.1002/adsu.202200330.
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Abstract
Commercially available platinum-supported carbon (Pt/C) catalysts are the most widely used oxygen reduction reaction (ORR) electrocatalysts in polymer electrolyte membrane fuel cells (PEMFCs). However, inadequate active triple-phase boundary formation and carbon oxidation in Pt/C during PEMFC operation shorten its lifetime and efficiency. In this direction, a new class of carbon-free electrocatalysts for ORR is prepared by dispersing Pt nanoparticles on ZrP (Zirconium phosphates) nanoplates. In one case (ZrP@Pt), the Pt nanoparticles are found to be closely distributed and completely covering the ZrP nanoplates, whereas in the second case (Pt/ZrP), the Pt nanoparticles selectively restrict dispersion along the edges of the support. ZrP as the support displays an intrinsic proton conductivity of ≈0.5 × 10−4 S cm−1 at 70 °C, with an activation energy (Ea) of 0.19 eV. Pt/ZrP shows better durability after 3000 start-stop cycles. The mass activity of Pt/ZrP is increased by 4.6 times compared to Pt/C, which exhibits a loss in mass activity by 1.37 times. The single-cell level validation of ZrP@Pt, Pt/ZrP, and Pt/C as the electrocatalysts in PEMFC at an operating potential of 0.60 V shows the achievable current densities of 0.600, 0.890, and 0.890 A cm−2.
| Type: | Article |
|---|---|
| Title: | Pt-Anchored-Zirconium Phosphate Nanoplates as High-Durable Carbon-Free Oxygen Reduction Reaction Electrocatalyst for PEM Fuel Cell Applications |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/adsu.202200330 |
| Publisher version: | https://doi.org/10.1002/adsu.202200330 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | carbon-free electrocatalysts, fuel cells, oxygen reduction reaction, zirconium phosphate |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10168573 |
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