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Atomic Pt clusters on Au dendrite for formic acid oxidation by Kim, Jooyoung (author);Kim, Hyunki (author);Kim, Sungjun (author);Jang, Jue-Hyuk (author);Sohn, Hyuntae (author);Hong, Seok Jin (author);Kim, Junhyeong (author);Han, Gyeong Ho (author);Choe, Seonghyun (author);Sung, Yung-Eun (author);Kim, Soo Young (author);Jang, Ho Won (author);Jo, Tae Hwan (author);Lim, Hyung-Kyu (author);Yoo, Sung Jong (author);Ahn, Sang Hyun (author) is a Engineering article available to read on EtoBox.

What is Atomic Pt clusters on Au dendrite for formic acid oxidation about?

The minimization of Pt loadings on Au via facile fabrication methods remains a grand challenge in the development of commercially viable electrodes for direct formic acid fuel cells. Herein, we report a simple electrochemical strategy to prepare atomic Pt clusters on Au dendrites supported by carbon paper (CP) as a gas diffusion electrode. At highly negative deposition potentials, Pt deposition is autonomously quenched by immediate adsorption of discharged proton (H) on Pt surface, while highly roughened Au dendrites lead to resistance–capacitance delay for the transient cathodic current. As a result, the suppressed Pt nucleation and self-terminated Pt growth allows for the formation of isolated Pt sites on Au dendrites. The Pt/Au/CP with an ultra-low Pt loading of 5.0 μgPt/cmgeo 2 demonstrates high selectivity for direct pathway of formic acid oxidation reaction (FAOR), owing to the ensemble effect. A gradual increase of FAOR activity is observed during cycling test and then, the 20 cycled Pt/Au/CP shows remarkable FAOR activity in half-cell test, exceeding state-of-the-art Pt-Au catalysts. Theoretical calculation indicates that the stabilized intermediate on Pt clusters accelerat

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Author
Kim, Jooyoung (author);Kim, Hyunki (author);Kim, Sungjun (author);Jang, Jue-Hyuk (author);Sohn, Hyuntae (author);Hong, Seok Jin (author);Kim, Junhyeong (author);Han, Gyeong Ho (author);Choe, Seonghyun (author);Sung, Yung-Eun (author);Kim, Soo Young (author);Jang, Ho Won (author);Jo, Tae Hwan (author);Lim, Hyung-Kyu (author);Yoo, Sung Jong (author);Ahn, Sang Hyun (author)
Publisher
Elsevier BV
Published
2023
Language
EN
Field
Engineering (Physical Sciences)

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