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RISS 인기검색어
- 검색키워드
- 저자 : Tongol, Bernard John V. (검색결과 1 건)
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Mendoza, Maria Krisandra L.,Tongol, Bernard John V.,Shanmugam, Sangaraju,Kim, Hasuck Elsevier 2018 International journal of hydrogen energy Vol.43 No.43
<P><B>Abstract</B></P> <P>Pulse electrodeposition of Pt and Sn using 10 mM H<SUB>2</SUB>PtCl<SUB>6</SUB>⋅6H<SUB>2</SUB>O in 0.10 M H<SUB>2</SUB>SO<SUB>4</SUB> and 10 mM SnCl<SUB>2</SUB>⋅2H<SUB>2</SUB>O in 0.10 M HCl was conducted on a support matrix consisting of electropolymerized poly (3,4-ethylenedioxythiophene) (PEDOT) and electrochemically exfoliated graphene oxide (EGO). The Field Emission – Scanning Electron Microscopy (FE-SEM) studies of PtSn/PEDOT/EGO (i.e., PEDOT on EGO) showed a homogeneous globular composite, while PtSn/EGO/PEDOT (i.e., EGO on PEDOT) revealed a heterogeneous composite with wrinkled and globular surface morphologies. An Energy Dispersive X-ray (EDX) analysis (as a percentage of Pt and Sn) of PtSn/PEDOT/EGO is in agreement with the X-ray Photoelectron Spectroscopy (XPS) analysis, indicative of a homogeneous surface for the dispersion of metallic particles. However, the EDX and XPS analyses of PtSn/EGO/PEDOT showed variations in the amount of Pt and Sn, indicative of possible mixing of the EGO and PEDOT support matrices. Cyclic voltammetry (CV) and chronoamperometry using 1.0 M ethanol in 0.1 M H<SUB>2</SUB>SO<SUB>4</SUB> demonstrated higher electrocatalytic activity (83.7 mA/cm<SUP>2</SUP>) and electrochemical stability (29.0% current retention) in PtSn/PEDOT/EGO than PtSn/EGO/PEDOT.</P> <P><B>Highlights</B></P> <P> <UL> <LI> PtSn was pulse electrodeposited on PEDOT/EGO and EGO/PEDOT support matrices. </LI> <LI> PEDOT/EGO is a better support matrix for the pulse electrodeposited PtSn. </LI> <LI> PtSn/PEDOT/EGO showed a more enhanced electrocatalytic activity and stability. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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