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Issue 40, 2018
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Rationally designed metal nanocluster for electrocatalytic hydrogen production from water

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Abstract

The highly evolved hydrogenase enzymes efficiently catalyze the hydrogen evolution reaction (HER) from water. Detailed structural studies of these enzymes have triggered many research efforts to synthesize their structural mimics based on metal complexes. However, the hydrogen production rates catalyzed by these molecular complexes are still too low to be technologically viable. Here, we report that a tailored PtAu24 nanocluster containing proton relays can efficiently catalyze the HER from water. We compared the electrocatalytic HER activities of Au25 nanoclusters protected with three different ligands, namely, 1-hexanethiolate, 3-mercaptopropionic acid and 3-mercapto-1-propanesulfonic acid, and found that the electrocatalytic activity is closely related with the proton-relaying abilities of the ligands. The core-engineered PtAu24 protected with efficient proton-relaying ligands exhibits unprecedented catalytic activity with a turnover frequency of 127 per second from water at a moderate overpotential of 0.7 V, greatly exceeding the performance of the best molecular catalyst. The atomically precise metal nanoclusters provide a platform for the design and optimization of finely tailored catalysts.

Graphical abstract: Rationally designed metal nanocluster for electrocatalytic hydrogen production from water

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Article information


Submitted
02 Jul 2018
Accepted
24 Sep 2018
First published
25 Sep 2018

J. Mater. Chem. A, 2018,6, 19495-19501
Article type
Paper

Rationally designed metal nanocluster for electrocatalytic hydrogen production from water

K. Kwak, W. Choi, Q. Tang, D. Jiang and D. Lee, J. Mater. Chem. A, 2018, 6, 19495
DOI: 10.1039/C8TA06306K

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