Greatly Enhanced Oxygen Reduction Reaction in Anion Exchange Membrane Fuel Cell and Zn‐Air Battery via Hole Inner Edge Reconstruction of 2D Pd Nanomesh
Source abstract
Abstract
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 mgPd−1, which is 27.8 fold and 23.6 fold higher, respectively, than those of the commercial Pt/C (0.096 A mgPt−1) and Pd/C (0.113 A mgPd−1) at 0.9 VRHE. 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.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced battery technologies research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of Education Taiyuan 030024 P. R. China
School of Chemistry and Physics Queensland University of Technology Brisbane Queensland 4001 Australia
Instrumental Analysis Center Taiyuan University of Technology Taiyuan 030024 P. R. China
Materials Institute of Atomic and Molecular Science Shaanxi University of Science & Technology Xi'an 710021 P. R. China
School of Mechanical Medical and Process Engineering Queensland University of Technology Brisbane Queensland 4001 Australia
Centre for Materials Science Queensland University of Technology Brisbane Queensland 4001 Australia
Institute for Biomedical Materials & Devices (IBMD) Faculty of Science University of Technology Sydney Sydney NSW 2007 Australia
Funding
National Natural Science Foundation of China · Natural Science Foundation of Shanxi Province · Australian Research Council
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