High-performance Platinum-free oxygen reduction reaction and hydrogen oxidation reaction catalyst in polymer electrolyte membrane fuel cell

Scientific Reports
Priji ChandranSundara Ramaprabhu

Abstract

The integration of polymer electrolyte membrane fuel cell (PEMFC) stack into vehicles necessitates the replacement of high-priced platinum (Pt)-based electrocatalyst, which contributes to about 45% of the cost of the stack. The implementation of high-performance and durable Pt metal-free catalyst for both oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR) could significantly enable large-scale commercialization of fuel cell-powered vehicles. Towards this goal, a simple, scalable, single-step synthesis method was adopted to develop palladium-cobalt alloy supported on nitrogen-doped reduced graphene oxide (Pd3Co/NG) nanocomposite. Rotating ring-disk electrode (RRDE) studies for the electrochemical activity towards ORR indicates that ORR proceeds via nearly four-electron mechanism. Besides, the mass activity of Pd3Co/NG shows an enhancement of 1.6 times compared to that of Pd/NG. The full fuel cell measurements were carried out using Pd3Co/NG at the anode, cathode in conjunction with Pt/C and simultaneously at both anode and cathode. A maximum power density of 68 mW/cm2 is accomplished from the simultaneous use of Pd3Co/NG as both anode and cathode electrocatalyst with individual loading of 0.5 mg/cm2 at 60 °C w...Continue Reading

References

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Citations

Feb 13, 2020·Nanotechnology·Rashmi Chandrabhan ShendeSundara Ramaprabhu
Oct 7, 2020·Chemical Communications : Chem Comm·Seiji OgoKenji Kaneko
Nov 26, 2020·Advanced Materials·Yong Jae KimWonHyoung Ryu
Nov 2, 2019·Journal of Colloid and Interface Science·Sarvajith Malali SudhakaraMusthafa Ottakam Thotiyl
Jul 3, 2021·Materials·Samantha K Samaniego AndradeKrisztina László
Oct 9, 2020·ACS Applied Materials & Interfaces·Jiaojiao GaoQunhui Yuan

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Methods Mentioned

BETA
X-ray
scanning
transmission electron microscopy

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