Structural diagnostic and electrocatalytic show of the prepared PtCo-IMC catalysts. Credit: Prof. YANG's group
Highly progressive and durable low-Pt (platinum) electrocatalysts that tin dramatically trim costly Pt usage successful the oxygen simplification absorption (ORR) are urgently required for the commercialization of substance compartment vehicles. Cost-effective, Pt-based intermetallic (IMC) catalysts person been regarded arsenic the astir promising alternate to boost enactment and durability towards ORR; however, the enactment of high-loaded Pt-based IMCs usually involves high-temperature annealing, which leads to terrible agglomeration and nonuniformity of IMC nanoparticles (NPs), imposing an tremendous situation connected businesslike synthesis.
Motivated by this challenge, an interdisciplinary probe squad led by Prof. Yang Hui and Prof. Jiang Zheng from the Shanghai Advanced Research Institute of the Chinese Academy of Sciences precocious reported a high-loaded (44.7 wt.%) and sub-6 nm Pt IMC catalyst that tin beryllium controllably synthesized done a cobalt oxide aided structural improvement strategy. Results were published successful Energy & Environmental Science.
According to the researchers, the as-prepared catalyst exhibited superb electrocatalytic show for the ORR with a greatly enhanced wide enactment and durability successful exemplary electrode measurements.
Impressively, the resultant catalyst delivered a record-high powerfulness density and bonzer stability. Particularly, the wide enactment calculated from fuel cell successful MEA configuration exceeded the Department of Energy (DOE) 2020 automotive people and precise adjacent to the intrinsic value, indicating that fantabulous enactment tin beryllium highly businesslike look nether proton speech membrane substance compartment operating conditions.
The synthetic attack developed successful this survey provides a feasible strategy for the improvement of high-loaded, small-sized substance compartment electrocatalysts with precocious activity expression, paving a caller mode for aboriginal applicable exertion of low-Pt catalysts successful substance cells.
More information: Qingqing Cheng et al, High-loaded sub-6 nm Pt1Co1 intermetallic compounds with highly businesslike show look successful PEMFCs, Energy & Environmental Science (2021). DOI: 10.1039/D1EE02530A
Citation: Novel electrocatalyst for proton-exchange membrane substance cells (2021, December 13) retrieved 13 December 2021 from https://techxplore.com/news/2021-12-electrocatalyst-proton-exchange-membrane-fuel-cells.html
This papers is taxable to copyright. Apart from immoderate just dealing for the intent of backstage survey oregon research, no portion whitethorn beryllium reproduced without the written permission. The contented is provided for accusation purposes only.
English (US) ·