Pt-Sn Nanoparticles Supported on Carbon Nanodots as Anode Catalysts for Alcohol Electro-oxidation in Acidic Conditions

Sandile Surprise Gwebu; Philiswa Nosizo Nomngongo; Nobanathi Wendy Maxakato

doi:10.1002/elan.201800098

Pt-Sn Nanoparticles Supported on Carbon Nanodots as Anode Catalysts for Alcohol Electro-oxidation in Acidic Conditions

Sandile Surprise Gwebu, Philiswa Nosizo Nomngongo, Nobanathi Wendy Maxakato

Chemical Sciences

University of Johannesburg

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

The Pt-Sn/CNDs electrocatalyst was synthesized by the alcohol reduction method with the aim to reduce platinum loading and improve electroactivity. XPS results showed that the nanoparticles were present in the form of Pt-Sn metallic alloy with a significant amount of SnO- species which facilitate the rapid oxidation of CO intermediates. The lattice parameter of Pt in Pt-Sn/CNDs electrocatalyst was calculated to be 0.3926 nm; this value is higher than 0.3921 nm, the lattice parameter of Pt in Pt/CNDs electrocatalyst. XRD results proved that incorporating tin (Sn) into the Pt/CNDs electrocatalyst modifies the face centred cubic shape of platinum to a crystalline structure which improves the alcohol electro-oxidation reactions. The electrochemical tests proved that the Pt-Sn/CNDs electrocatalyst exhibited high current densities and lower poisoning rates compared to the Pt/CNDs and Pt/C electrocatalysts. The Pt-Sn/CNDs electrocatalyst showed the greatest electroactivity for both methanol and ethanol electro-oxidation reactions.

Original language	English
Pages (from-to)	1125-1132
Number of pages	8
Journal	Electroanalysis
Volume	30
Issue number	6
DOIs	https://doi.org/10.1002/elan.201800098
Publication status	Published - Jun 2018

Keywords

carbon nanodots
electrocatalyst
ethanol
fuel cells
methanol
platinum
tin

ASJC Scopus subject areas

Analytical Chemistry
Electrochemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/elan.201800098

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title = "Pt-Sn Nanoparticles Supported on Carbon Nanodots as Anode Catalysts for Alcohol Electro-oxidation in Acidic Conditions",

abstract = "The Pt-Sn/CNDs electrocatalyst was synthesized by the alcohol reduction method with the aim to reduce platinum loading and improve electroactivity. XPS results showed that the nanoparticles were present in the form of Pt-Sn metallic alloy with a significant amount of SnO- species which facilitate the rapid oxidation of CO intermediates. The lattice parameter of Pt in Pt-Sn/CNDs electrocatalyst was calculated to be 0.3926 nm; this value is higher than 0.3921 nm, the lattice parameter of Pt in Pt/CNDs electrocatalyst. XRD results proved that incorporating tin (Sn) into the Pt/CNDs electrocatalyst modifies the face centred cubic shape of platinum to a crystalline structure which improves the alcohol electro-oxidation reactions. The electrochemical tests proved that the Pt-Sn/CNDs electrocatalyst exhibited high current densities and lower poisoning rates compared to the Pt/CNDs and Pt/C electrocatalysts. The Pt-Sn/CNDs electrocatalyst showed the greatest electroactivity for both methanol and ethanol electro-oxidation reactions.",

keywords = "carbon nanodots, electrocatalyst, ethanol, fuel cells, methanol, platinum, tin",

author = "Gwebu, {Sandile Surprise} and Nomngongo, {Philiswa Nosizo} and Maxakato, {Nobanathi Wendy}",

note = "Publisher Copyright: {\textcopyright} 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2018",

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doi = "10.1002/elan.201800098",

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AU - Gwebu, Sandile Surprise

AU - Nomngongo, Philiswa Nosizo

AU - Maxakato, Nobanathi Wendy

PY - 2018/6

Y1 - 2018/6

N2 - The Pt-Sn/CNDs electrocatalyst was synthesized by the alcohol reduction method with the aim to reduce platinum loading and improve electroactivity. XPS results showed that the nanoparticles were present in the form of Pt-Sn metallic alloy with a significant amount of SnO- species which facilitate the rapid oxidation of CO intermediates. The lattice parameter of Pt in Pt-Sn/CNDs electrocatalyst was calculated to be 0.3926 nm; this value is higher than 0.3921 nm, the lattice parameter of Pt in Pt/CNDs electrocatalyst. XRD results proved that incorporating tin (Sn) into the Pt/CNDs electrocatalyst modifies the face centred cubic shape of platinum to a crystalline structure which improves the alcohol electro-oxidation reactions. The electrochemical tests proved that the Pt-Sn/CNDs electrocatalyst exhibited high current densities and lower poisoning rates compared to the Pt/CNDs and Pt/C electrocatalysts. The Pt-Sn/CNDs electrocatalyst showed the greatest electroactivity for both methanol and ethanol electro-oxidation reactions.

AB - The Pt-Sn/CNDs electrocatalyst was synthesized by the alcohol reduction method with the aim to reduce platinum loading and improve electroactivity. XPS results showed that the nanoparticles were present in the form of Pt-Sn metallic alloy with a significant amount of SnO- species which facilitate the rapid oxidation of CO intermediates. The lattice parameter of Pt in Pt-Sn/CNDs electrocatalyst was calculated to be 0.3926 nm; this value is higher than 0.3921 nm, the lattice parameter of Pt in Pt/CNDs electrocatalyst. XRD results proved that incorporating tin (Sn) into the Pt/CNDs electrocatalyst modifies the face centred cubic shape of platinum to a crystalline structure which improves the alcohol electro-oxidation reactions. The electrochemical tests proved that the Pt-Sn/CNDs electrocatalyst exhibited high current densities and lower poisoning rates compared to the Pt/CNDs and Pt/C electrocatalysts. The Pt-Sn/CNDs electrocatalyst showed the greatest electroactivity for both methanol and ethanol electro-oxidation reactions.

KW - carbon nanodots

KW - electrocatalyst

KW - ethanol

KW - fuel cells

KW - methanol

KW - platinum

KW - tin

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DO - 10.1002/elan.201800098

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VL - 30

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JO - Electroanalysis

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IS - 6

ER -

Pt-Sn Nanoparticles Supported on Carbon Nanodots as Anode Catalysts for Alcohol Electro-oxidation in Acidic Conditions

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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