Mesoporous PtPb Nanosheets as Efficient Electrocatalysts for Hydrogen Evolution and Ethanol Oxidation

Weidong Ao; Huijun Ren; Changgen Cheng; Zhishuai Fan; Peiqun Yin; Qing Qin; Qi Zhang; Lei Dai

doi:10.1002/anie.202305158

Mesoporous PtPb Nanosheets as Efficient Electrocatalysts for Hydrogen Evolution and Ethanol Oxidation

Angew Chem Int Ed Engl. 2023 Jul 24;62(30):e202305158. doi: 10.1002/anie.202305158. Epub 2023 Jun 20.

Authors

Weidong Ao¹, Huijun Ren¹, Changgen Cheng¹, Zhishuai Fan¹, Peiqun Yin², Qing Qin³, Qi Zhang⁴, Lei Dai¹

Affiliations

¹ Key Laboratory for Special Functional Materials of Ministry of Education, School of Materials Science and Engineering, Henan University, 475004, Kaifeng, China.
² Center of Biomedical Materials Research and Engineering, School of Biomedical Engineering, Anhui Medical University, 230032, Hefei, China.
³ Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, College of Chemistry and Materials Science, Anhui Normal University, 241002, Wuhu, China.
⁴ Institute of Industry & Equipment Technology, Anhui Province Key Lab of Aerospace Structural Parts Forming Technology and Equipment, Hefei University of Technology, 230009, Hefei, China.

PMID: 37235520
DOI: 10.1002/anie.202305158

Abstract

Using a one-pot hydrothermal method with ethylenediamine, we have synthesized mesoporous PtPb nanosheets that exhibit exceptional activity in both hydrogen evolution and ethanol oxidation. The resulting PtPb nanosheets have a Pt-enriched structure with up to 80 % atomic content of Pt. The synthetic method generated a significant mesoporous structure, formed through the dissolution of Pb species. These advanced structures enable the mesoporous PtPb nanosheets to achieve a current density of 10 mA cm^-2 with an extreme low overpotential of 21 mV for hydrogen evolution under alkaline conditions. Furthermore, the mesoporous PtPb nanosheets exhibit superior catalytic activity and stability for ethanol oxidation. The highest catalytic current density of PtPb nanosheets is 5.66 times higher than that of commercial Pt/C. This research opens up new possibilities in designing mesoporous, two-dimensional noble-metal-based materials for electrochemical energy conversion with excellent performance.

Keywords: Bifunctional Electrocatalyst; Ethanol Oxidation; Hydrogen Evolution Reaction; PtPb Nanosheets; Two-Dimensional Materials.

Grants and funding

22202059/National Natural Science Foundation of China