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One-pot synthesis of PtIn/3D-GNs composites with high alloying degree for electro-photo synergistic catalysis.

Authors :
Ye, Yixiang
Wang, Yanli
Li, Zhongshui
Ye, Yanzhu
Liu, Ying
Zou, Xiaohuan
Lin, Shen
Source :
New Journal of Chemistry; 11/21/2019, Vol. 43 Issue 43, p17023-17032, 10p
Publication Year :
2019

Abstract

In this work, a one-pot solid phase reaction was used to synthesize PtIn/3D-GNs composites with different alloying degrees. The as-synthesized composites were characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), and X-ray photoelectron spectroscopy (XPS). The results indicate that PtIn alloy was formed in the PtIn/3D-GNs composites. However, In(0) content in the composites (denoted as PtIn/3D-GNs (O)) when In<subscript>2</subscript>O<subscript>3</subscript> was used as a precursor of In is almost twice as much as that in the composites (denoted as PtIn/3D-GNs (S)) using In(NO<subscript>3</subscript>)<subscript>3</subscript> as a precursor of In, which indicates the higher Pt–In alloying degree in PtIn/3D-GNs (O). Electrochemical tests show that PtIn/3D-GNs composites exhibit superior electrocatalytic activity, better stability and enhanced antipoisoning ability toward methanol oxidation reaction (MOR) in comparison with Pt/3D-GNs and the commercial Pt/C. Interestingly, the synergistic effect between the charge separation of In<subscript>2</subscript>O<subscript>3</subscript> and the SPR excitation of In(0) under light irradiation contributes to their good electro-photocatalytic performance under simulated sunlight irradiation. Especially, the higher Pt–In alloying degree in PtIn/3D-GNs (O) contributes to its better conductivity, which is responsible for its more efficient electro-photocatalytic properties. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
11440546
Volume :
43
Issue :
43
Database :
Complementary Index
Journal :
New Journal of Chemistry
Publication Type :
Academic Journal
Accession number :
139473061
Full Text :
https://doi.org/10.1039/c9nj04367e