Multimetallic Hierarchical Aerogels: Shape Engineering of the Building Blocks for Efficient Electrocatalysis.

Cai, Bin; Dianat, Arezoo; Hübner, René; Liu, Wei; Wen, Dan; Benad, Albrecht; Sonntag, Luisa; Gemming, Thomas et al. · Adv Mater · 2017

basic_science · Level V

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Abstract

A new class of multimetallic hierarchical aerogels composed entirely of interconnected Ni-Pd<sub>x</sub> Pt<sub>y</sub> nano-building-blocks with in situ engineered morphologies and compositions is demonstrated. The underlying mechanism of the galvanic shape-engineering is elucidated in terms of nanowelding of intermediate nanoparticles. The hierarchical aerogels integrate two levels of porous structures, leading to improved electrocatalysis performance.