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Anchoring nanosized Pd on three-dimensional boron- and nitrogen-codoped graphene aerogels as a highly active multifunctional electrocatalyst for formic acid and methanol oxidation reactions

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Abstract

Both direct formic acid fuel cells (DFAFCs) and direct methanol fuel cells (DMFCs) are promising power-generation technologies for various electronic devices, while their large-scale commercial applications are largely precluded by the lack of advanced noble metal catalysts with high activity and acceptable cost. Herein, we report a simple and scalable strategy to prepare nanosized Pd crystals anchored on three-dimensional (3D) boron- and nitrogen-codoped graphene aerogels (Pd/BNG) as multifunctional electrocatalysts for formic acid and methanol oxidation reactions. The resulting Pd/BNG catalyst possesses a series of distinctive structural merits adapted to the anode fuel cell catalytic systems, such as large specific surface areas, 3D interconnected porous frameworks, uniform Pd distribution, abundant B and N active sites, and excellent electrical conductivity. Compared with the conventional Pd/carbon black and Pd/graphene catalysts, the newly designed 3D Pd/BNG architecture exhibits dramatically enhanced electrocatalytic performance, including large electrochemically active surface areas, high mass activity, and good long-term stability. Density functional theory calculation further discloses that there is a strong electronic interaction between Pd and the BNG substrate, which effectively enhances the antitoxic ability of Pd/BNG toward CO intermediates and thereby promotes the electrocatalytic reaction kinetics.

Graphical abstract: Anchoring nanosized Pd on three-dimensional boron- and nitrogen-codoped graphene aerogels as a highly active multifunctional electrocatalyst for formic acid and methanol oxidation reactions

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Publication details

The article was received on 07 Nov 2019, accepted on 03 Dec 2019 and first published on 04 Dec 2019


Article type: Research Article
DOI: 10.1039/C9QI01448A
Inorg. Chem. Front., 2020, Advance Article

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    Anchoring nanosized Pd on three-dimensional boron- and nitrogen-codoped graphene aerogels as a highly active multifunctional electrocatalyst for formic acid and methanol oxidation reactions

    Y. Yang, H. Huang, B. Shen, L. Jin, Q. Jiang, L. Yang and H. He, Inorg. Chem. Front., 2020, Advance Article , DOI: 10.1039/C9QI01448A

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