Bimetallic-MOF Derived Carbon with Single Pt Anchored C4 Atomic Group Constructing Super Fuel Cell with Ultrahigh Power Density And Self-Change Ability

Lulu Chai, Jinlu Song, Anuj Kumar, Rui Miao, Yanzhi Sun, Xiaoguang Liu, Ghulam Yasin, Xifei Li, Junqing Pan*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

Pursuing high power density with low platinum catalysts loading is a huge challenge for developing high-performance fuel cells (FCs). Herein, a new super fuel cell (SFC) is proposed with ultrahigh output power via specific electric double-layer capacitance (EDLC) + oxygen reduction reaction (ORR) parallel discharge, which is achieved using the newly prepared catalyst, single-atomic platinum on bimetallic metal-organic framework (MOF)-derived hollow porous carbon nanorods (PtSA/HPCNR). The PtSA-1.74/HPCNR-based SFC has a 3.4-time higher transient specific power density and 13.3-time longer discharge time with unique in situ self-charge and energy storage ability than 20% Pt/C-based FCs. X-ray absorption fine structure, aberration-corrected high-angle annular dark-field scanning transmission electron microscope, and density functional theory calculations demonstrate that the synergistic effect of Pt single-atoms anchored on carbon defects significantly boosts its electron transfer, ORR catalytic activity, durability, and rate performance, realizing rapid “ ORR+EDLC” parallel discharge mechanism to overcome the sluggish ORR process of traditional FCs. The promising SFC leads to a new pathway to boost the power density of FCs with extra-low Pt loading.

Original languageEnglish
Article number2308989
JournalAdvanced Materials
Volume36
Issue number1
Early online date2023
DOIs
Publication statusPublished - 4 Jan 2024
MoE publication typeA1 Journal article-refereed

Keywords

  • hollow porous structure
  • parallel discharge
  • Pt single atoms catalyst
  • self-charging
  • ultra-high specific power

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