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Graphene-nanopocket-encaged PtCo nanocatalysts for highly durable fuel cell operation under demanding ultralow-Pt-loading conditions

Nature nanotechnology, 2022-09, Vol.17 (9), p.968-975 [Peer Reviewed Journal]

The Author(s), under exclusive licence to Springer Nature Limited 2022. ;ISSN: 1748-3387 ;EISSN: 1748-3395 ;DOI: 10.1038/s41565-022-01170-9

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Title:
Graphene-nanopocket-encaged PtCo nanocatalysts for highly durable fuel cell operation under demanding ultralow-Pt-loading conditions
Author: Zhao, Zipeng ; Liu, Zeyan ; Zhang, Ao ; Yan, Xingxu ; Xue, Wang ; Peng, Bosi ; Xin, Huolin L ; Pan, Xiaoqing ; Duan, Xiangfeng ; Huang, Yu
Subjects: Accelerated tests ; Active sites ; Automotive parts ; Catalysts ; Catalytic converters ; Cobalt ; Durability ; Electrochemistry ; Emission control equipment ; Exhaust systems ; Fuel cells ; Fuel technology ; Graphene ; Intermetallic compounds ; Materials Science ; Platinum ; Platinum metals ; Power sources ; Proton exchange membrane fuel cells ; Science & Technology - Other Topics ; Ultrafines
Is Part Of: Nature nanotechnology, 2022-09, Vol.17 (9), p.968-975
Description: The proton exchange membrane fuel cell (PEMFC) as an attractive clean power source can promise a carbon-neutral future, but the widespread adoption of PEMFCs requires a substantial reduction in the usage of the costly platinum group metal (PGM) catalysts. Ultrafine nanocatalysts are essential to provide sufficient catalytic sites at a reduced PGM loading, but are fundamentally less stable and prone to substantial size growth in long-term operations. Here we report the design of a graphene-nanopocket-encaged platinum cobalt (PtCo@Gnp) nanocatalyst with good electrochemical accessibility and exceptional durability under a demanding ultralow PGM loading (0.070 mgPGM cm–2) due to the non-contacting enclosure of graphene nanopockets. The PtCo@Gnp delivers a state-of-the-art mass activity of 1.21 A mgPGM–1, a rated power of 13.2 W mgPGM–1 and a mass activity retention of 73% after an accelerated durability test. With the greatly improved rated power and durability, we project a 6.8 gPGM loading for a 90 kW PEMFC vehicle, which approaches that used in a typical catalytic converter. Ultrafine catalysts are desirable for the reduction of fuel cell costs but are intrinsically unstable. Here the authors report graphene-nanopocket-encaged PtCo catalysts with exceptional durability under the demanding ultralow-Pt-loading condition while delivering a satisfactory fuel cell performance.
Publisher: London: Nature Publishing Group
Language: English
Identifier: ISSN: 1748-3387
EISSN: 1748-3395
DOI: 10.1038/s41565-022-01170-9
Source: ProQuest Central

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Graphene-nanopocket-encaged PtCo nanocatalysts for highly durable fuel cell operation under demanding ultralow-Pt-loading conditions

The Author(s), under exclusive licence to Springer Nature Limited 2022. ;ISSN: 1748-3387 ;EISSN: 1748-3395 ;DOI: 10.1038/s41565-022-01170-9

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