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Synergistically enhanced hydrogen evolution electrocatalysis by in-situ exsolution of metallic nanoparticles on perovskites

Abstract

The development of efficient non-noble-catalysts for hydrogen evolution reaction (HER) is paramount to alkaline water splitting for hydrogen production. Here we report a smart and effective approach to construct nano-sized metal/perovskite hybrids by a facile exsolution process as highly active electrocatalysts towards alkaline HER. Ni nanoparticles (NPs)-decorated La0.4Sr0.4Ti0.9O3-δ perovskite (e-LSTN) with intimate interface, representing a novel prime example of such hybrid catalysts, can synergistically catalyze HER in base media whereby La0.4Sr0.4Ti0.9O3-δ (LST) promotes water dissociation and Ni NPs (~30 nm) enables favorable hydrogen adsorption for recombination into H2. Benefiting from the strong interfacial interaction, desirable Ni nanostructure and low Ni mass loading, the e-LSTN hybrid shows much higher HER kinetics and mass activity than the physical mixtures of LST/Ni. Particularly, the approach designing such efficient hybrid catalysts is universal and the catalytic activity of hybrid catalysts could be tunable dependent on the category of exsolved metal and the acidity of perovskite substrate. This work not only brings about a cost-effective HER electrocatalyst, but more generally opens up new vistas for developing more advanced materials for various applications in the future.

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Publication details

The article was received on 13 Mar 2018, accepted on 16 Apr 2018 and first published on 16 Apr 2018


Article type: Communication
DOI: 10.1039/C8TA02347F
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Synergistically enhanced hydrogen evolution electrocatalysis by in-situ exsolution of metallic nanoparticles on perovskites

    Y. Zhu, J. Dai, W. Zhou, Y. Zhong, H. Wang and Z. Shao, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA02347F

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