Greatly Enhanced Oxygen Reduction Reaction in Anion Exchange Membrane Fuel Cell and Zn-Air Battery via Hole Inner Edge Reconstruction of 2D Pd Nanomesh

Jiakang Tian; Yanhui Song; Xiaodong Hao; Xudong Wang; Yongqing Shen; Peizhi Liu; Zebin Wei; Ting Liao; Lei Jiang; Junjie Guo; Bingshe Xu; Ziqi Sun

doi:10.1002/adma.202412051

Greatly Enhanced Oxygen Reduction Reaction in Anion Exchange Membrane Fuel Cell and Zn-Air Battery via Hole Inner Edge Reconstruction of 2D Pd Nanomesh

Adv Mater. 2024 Nov 12:e2412051. doi: 10.1002/adma.202412051. Online ahead of print.

Authors

Jiakang Tian¹, Yanhui Song^{1

2

3}, Xiaodong Hao⁴, Xudong Wang¹, Yongqing Shen¹, Peizhi Liu¹, Zebin Wei¹, Ting Liao^{5

6}, Lei Jiang⁷, Junjie Guo^{1

4}, Bingshe Xu^{1

4}, Ziqi Sun^{2

6}

Affiliations

¹ Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan, 030024, P. R. China.
² School of Chemistry and Physics, Queensland University of Technology, Brisbane, Queensland, 4001, Australia.
³ Instrumental Analysis Center Taiyuan University of Technology, Taiyuan, 030024, P. R. China.
⁴ Materials Institute of Atomic and Molecular Science, Shaanxi University of Science & Technology, Xi'an, 710021, P. R. China.
⁵ School of Mechanical, Medical and Process Engineering, Queensland University of Technology, Brisbane, Queensland, 4001, Australia.
⁶ Centre for Materials Science, Queensland University of Technology, Brisbane, Queensland, 4001, Australia.
⁷ Institute for Biomedical Materials & Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia.

PMID: 39529551
DOI: 10.1002/adma.202412051

Abstract

Platinum group metals (PGM) have yet to be the most active catalysts in various sustainable energy reactions. Their high cost, however, has made maximizing the activity and minimizing the dosage become an urgent priority for the practical applications of emerging technologies. Herein, a novel 2D Pd nanomesh structure possessing hole inner reconstructed edges (HIER) with exposed high energy facets and overstretched lattice parameters is fabricated through a facile room-temperature reduction method at gram-scale yields. The HIER enhances the catalytic performance of Pd in electrochemical oxygen reduction reaction (ORR), achieving superior mass activity (MA) of 2.672 A mg_Pd ^-1, which is 27.8 fold and 23.6 fold higher, respectively, than those of the commercial Pt/C (0.096 A mg_Pt ^-1) and Pd/C (0.113 A mg_Pd ^-1) at 0.9 V_RHE. Most significantly, in H₂-air anion exchange membrane fuel cell (AEMFC) and Zn-air battery (ZAB) applications, this unique Pd catalyst delivers a much-outperformed peak power density of 0.86 and 0.22 W cm^-2, respectively, compared with 0.54 and 0.13 W cm^-2 of the commercial Pt/C catalyst, indicating a novel pathway in electrocatalyst designs through HIER engineering.

Keywords: 2D porous materials; Pt‐group metal; Zn‐air battery; anion exchange membrane fuel cell; hole inner edge reconstruction; oxygen reduction reaction.

Abstract

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