Excavated cubic platinum–iridium alloy nanocrystals with high-index facets as highly efficient electrocatalysts in N2 fixation to NH3

Yu-Jie Mao; Lu Wei; Xin-Sheng Zhao; Yong-Sheng Wei; Jian-Wei Li; Tian Sheng; Fu-Chun Zhu; Na Tian; Zhi-You Zhou; Shi-Gang Sun

doi:10.1039/C9CC04034J

Excavated cubic platinum–iridium alloy nanocrystals with high-index facets as highly efficient electrocatalysts in N₂ fixation to NH₃†

Yu-Jie Mao,^ab Lu Wei,

*^a Xin-Sheng Zhao,^a Yong-Sheng Wei,^a Jian-Wei Li,^a Tian Sheng,

*^c Fu-Chun Zhu,^b Na Tian,

^b Zhi-You Zhou

^b and Shi-Gang Sun

*^b

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* Corresponding authors

^a School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
E-mail: lwei057@jsnu.edu.cn

^b State Key Lab of PCOSS, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
E-mail: sgsun@xmu.edu.cn

^c College of Chemistry and Materials Science, Anhui Normal University, Wuhu, China
E-mail: tsheng@ahnu.edu.cn

Abstract

Excavated cubic Pt₉₃Ir₇ alloy nanocrystals enclosed by high-index {710} facets exhibit excellent electrocatalytic properties for the nitrogen reduction reaction (NRR) with a high faradaic efficiency (40.8%) and NH₃ production rate (28 μg h⁻¹ cm⁻²). The presence of Ir on the Pt stepped surface suppresses the hydrogen evolution reaction (HER) and accelerates the NRR.

Chemical Communications

Excavated cubic platinum–iridium alloy nanocrystals with high-index facets as highly efficient electrocatalysts in N₂ fixation to NH₃†

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Excavated cubic platinum–iridium alloy nanocrystals with high-index facets as highly efficient electrocatalysts in N₂ fixation to NH₃

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