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Type: Journal article
Title: Strain effect in bimetallic electrocatalysts in the hydrogen evolution reaction
Author: Wang, X.
Zhu, Y.
Vasileff, A.
Jiao, Y.
Chen, S.
Song, L.
Zheng, B.
Zheng, Y.
Qiao, S.-.Z.
Citation: ACS Energy Letters, 2018; 3(5):1198-1204
Publisher: American Chemical Society
Issue Date: 2018
ISSN: 2380-8195
Statement of
Xuesi Wang, Yihan Zhu, Anthony Vasileff, Yan Jiao, Shuangming Chen, Li Song, Bin Zheng, Yao Zheng and Shi-Zhang Qiao
Abstract: Unravelling the electrocatalytic activity origins of bimetallic nanomaterials is of great importance, yet fundamentally challenging. One of the main reasons for this is that the interactive contributions from geometric and electronic effects to enhancements in reaction activity are difficult to distinguish from one another. Here, on well-defined Ru−Pt core−shell (Ru@Pt) and homogeneous alloy (RuPt) model electrocatalysts, we are able to isolate these two effects. Furthermore, we observe the dominant role of strain in the intrinsic activity of the alkaline hydrogen evolution reaction. In the Ru@Pt icosahedral nanostructure, the highly strained Pt shells effectively accommodate the interfacial lattice mismatch from a face-centered cubic structured Ru core. This unique property leads to a weak binding of hydrogen and optimal interaction with hydroxyl species during the reaction, thus leading to an enhanced apparent activity of Ru@Pt.
Rights: © 2018 American Chemical Society
RMID: 0030090287
DOI: 10.1021/acsenergylett.8b00454
Grant ID:
Appears in Collections:Chemical Engineering publications

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