Platinum/Nickel Bicarbonate Heterostructures towards Accelerated Hydrogen Evolution under Alkaline Conditions

Mengmeng Lao; Kun Rui; Guoqiang Zhao; Peixin Cui; Xusheng Zheng; Shi Xue Dou; Wenping Sun

doi:10.1002/anie.201901010

Platinum/Nickel Bicarbonate Heterostructures towards Accelerated Hydrogen Evolution under Alkaline Conditions

Angew Chem Int Ed Engl. 2019 Apr 8;58(16):5432-5437. doi: 10.1002/anie.201901010. Epub 2019 Mar 13.

Authors

Mengmeng Lao¹, Kun Rui¹, Guoqiang Zhao¹, Peixin Cui², Xusheng Zheng³, Shi Xue Dou¹, Wenping Sun¹

Affiliations

¹ Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, Wollongong, NSW, 2522, Australia.
² Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, P. R. China.
³ National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, P. R. China.

PMID: 30768749
DOI: 10.1002/anie.201901010

Abstract

Heterostructured nanomaterials, generally have physicochemical properties that differ from those of the individual components, and thus have potential in a wide range of applications. New platinum (Pt)/nickel bicarbonate (Ni(HCO₃ )₂ ) heterostructures are designed for an efficient alkaline hydrogen evolution reaction (HER). Notably, the specific and mass activity of Pt in Pt/Ni(HCO₃ )₂ are substantially improved compared to the bare Pt nanoparticles (NPs). The Ni(HCO₃ )₂ provides abundant water adsorption/dissociation sites and modulate the electronic structure of Pt, which determine the elementary reaction kinetics of alkaline HER. The Ni(HCO₃ )₂ nanoplates offer a platform for the uniform dispersion of Pt NPs, ensuring the maximum exposure of active sites. The results demonstrate that, Ni(HCO₃ )₂ is an effective catalyst promoter for alkaline HER.

Keywords: electrocatalysis; heterostructures; hydrogen evolution reaction; nickel bicarbonate; platinum.

Abstract

Grants and funding