TY  - BOOK
AU  - Cai,Y.
AU  - Liu,H.
AU  - Chen,X.
AU  - Yang,X.
AU  - Zhang,L.
AU  - Li,D.
AU  - Yang,D.
TI  - Porous biochar aerogel loaded PtFe alloys derived from natural marine polysaccharide for efficient oxygen reduction
T2  - Materials Today Sustainability, 20, p.100222, 2022
KW  - LOW PT LOADING
KW  - ALLOYS
KW  - ORR
KW  - MARINE BIOMASS
N1  - Artículo
N2  - Lowering the Pt loading of Pt-based materials is a promising strategy to explore excellent oxygen reduction reaction (ORR) electrocatalysts. One surprising approach is to develop Pt-alloys, which can effectively reduce the usage of Pt and induced highly catalytic activity through regulation effect between multimetals. Herein, the N-doped porous biochar aerogel/reduced graphene oxide loaded PtFe alloys (PtFe/NC-rGO (Pt1Fe5)) with low Pt loading (with a Pt content of 7.54 wt percent) were prepared using natural marine polysaccharide-alginate as precursor through simple pyrolysis process. The biochar aerogel as an ideal carbon support shows an excellent electrical conductivity as well as a high specific surface area utilized for mass transport together with ion diffusion during ORR. Consequently, the PtFe/NC-rGO (Pt1Fe5) exhibits highly excellent ORR catalytic activity with respect to the pure Pt/NC-rGO together with the commercial Pt/C catalysts, with good half-wave potentials of 0.81 and 0.87 V vs. RHE in 0.5 M H2SO4 as well as 0.1 M KOH solutions, respectively. The strategy gives a new way to construct Ptbased alloy ORR electrocatalysts with low Pt consumption and the easy availability of biomass raw materials for PtFe/NC-rGO ensures its potential for large-scale application
UR  - https://drive.google.com/file/d/1jpjGlIpQfT52rYMTohqSO74fP61MqPMp/view?usp=drive_link
ER  -