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

Pursuing high power density with low platinum catalysts loading is a huge challenge for developing high-performance fuel cells (FCs). Herein, we propose a new super fuel cell (SFC) with ultrahigh output power via specific electric double-layer capacitance (EDLC) + ORR parallel discharge, which is achieved using the newly prepared catalyst, single-atomic platinum on bimetallic MOF-derived hollow porous carbon nanorods (Pt SA /HPCNR). The Pt SA-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. XAFS, AC-HAADF-STEM, and DFT 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. This article is protected by copyright. All rights reserved.