Understanding the electrochemical differences of Pt doped and Pt supported over CeO2

Anuj Bisht; Bhanu P. Gangwar; T. Anupriya; Sudhanshu Sharma

doi:10.1007/s10008-013-2252-7

Understanding the electrochemical differences of Pt doped and Pt supported over CeO₂

Anuj Bisht, Bhanu P. Gangwar, T. Anupriya, Sudhanshu Sharma

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

19 Scopus citations

Abstract

Pt supported over CeO₂ (Pt on CeO₂) and Pt doped CeO₂ (Pt in CeO₂) are synthesized using chemical reduction and solution combustion method. In chemical reduction two different reducing agents are used namely; hydrazine hydrate and formaldehyde giving Pt supported over CeO₂. Solution combustion method is used to prepare Pt doped CeO₂. Detailed characterization using X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area measurement and transmission electron microscopy (TEM) is carried out to distinguish the Pt supported and doped compounds. XRD and TEM results have clearly shown the differences in the structure and morphology, however, BET results do not show significant differences. Further, electrochemical measurements are performed in neutral medium to differentiate the electrochemical activity. Cyclic voltammetry (CV) indeed shows noticeable differences between Pt supported over CeO₂ and Pt doped CeO₂. CeO₂ alone has also shown different electrochemical behavior compared to the Pt containing CeO₂. Considering oxygen evolution reaction (OER) as a model reaction, Tafel slope measurements are performed for CeO₂, Pt supported over CeO ₂ and Pt doped CeO₂ to observe the differences. It was noted that CeO₂ and Pt doped CeO₂ showed similar Tafel slope indicating the same mechanism, while Pt supported over CeO₂ showed different Tafel slopes, hence the different mechanism.

Original language	English
Pages (from-to)	197-206
Number of pages	10
Journal	Journal of Solid State Electrochemistry
Volume	18
Issue number	1
DOIs	https://doi.org/10.1007/s10008-013-2252-7
State	Published - Jan 2014
Externally published	Yes

Funding

We gratefully acknowledge IIT Gandhinagar and DST Ramanujan fellowship for funding. A. Bisht, B. Gangwar and T. Anupriya are thankful to DST and IIT Gandhinagar for fellowships.

Funders	Funder number
IIT Gandhinagar
Department of Science and Technology, Ministry of Science and Technology, India

Keywords

Chemical reduction
Electrochemical properties
Interaction
Oxygen evolution reaction
Tafel

Access to Document

10.1007/s10008-013-2252-7

Cite this

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abstract = "Pt supported over CeO2 (Pt on CeO2) and Pt doped CeO2 (Pt in CeO2) are synthesized using chemical reduction and solution combustion method. In chemical reduction two different reducing agents are used namely; hydrazine hydrate and formaldehyde giving Pt supported over CeO2. Solution combustion method is used to prepare Pt doped CeO2. Detailed characterization using X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area measurement and transmission electron microscopy (TEM) is carried out to distinguish the Pt supported and doped compounds. XRD and TEM results have clearly shown the differences in the structure and morphology, however, BET results do not show significant differences. Further, electrochemical measurements are performed in neutral medium to differentiate the electrochemical activity. Cyclic voltammetry (CV) indeed shows noticeable differences between Pt supported over CeO2 and Pt doped CeO2. CeO2 alone has also shown different electrochemical behavior compared to the Pt containing CeO2. Considering oxygen evolution reaction (OER) as a model reaction, Tafel slope measurements are performed for CeO2, Pt supported over CeO 2 and Pt doped CeO2 to observe the differences. It was noted that CeO2 and Pt doped CeO2 showed similar Tafel slope indicating the same mechanism, while Pt supported over CeO2 showed different Tafel slopes, hence the different mechanism.",

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AU - Sharma, Sudhanshu

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N2 - Pt supported over CeO2 (Pt on CeO2) and Pt doped CeO2 (Pt in CeO2) are synthesized using chemical reduction and solution combustion method. In chemical reduction two different reducing agents are used namely; hydrazine hydrate and formaldehyde giving Pt supported over CeO2. Solution combustion method is used to prepare Pt doped CeO2. Detailed characterization using X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area measurement and transmission electron microscopy (TEM) is carried out to distinguish the Pt supported and doped compounds. XRD and TEM results have clearly shown the differences in the structure and morphology, however, BET results do not show significant differences. Further, electrochemical measurements are performed in neutral medium to differentiate the electrochemical activity. Cyclic voltammetry (CV) indeed shows noticeable differences between Pt supported over CeO2 and Pt doped CeO2. CeO2 alone has also shown different electrochemical behavior compared to the Pt containing CeO2. Considering oxygen evolution reaction (OER) as a model reaction, Tafel slope measurements are performed for CeO2, Pt supported over CeO 2 and Pt doped CeO2 to observe the differences. It was noted that CeO2 and Pt doped CeO2 showed similar Tafel slope indicating the same mechanism, while Pt supported over CeO2 showed different Tafel slopes, hence the different mechanism.

AB - Pt supported over CeO2 (Pt on CeO2) and Pt doped CeO2 (Pt in CeO2) are synthesized using chemical reduction and solution combustion method. In chemical reduction two different reducing agents are used namely; hydrazine hydrate and formaldehyde giving Pt supported over CeO2. Solution combustion method is used to prepare Pt doped CeO2. Detailed characterization using X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area measurement and transmission electron microscopy (TEM) is carried out to distinguish the Pt supported and doped compounds. XRD and TEM results have clearly shown the differences in the structure and morphology, however, BET results do not show significant differences. Further, electrochemical measurements are performed in neutral medium to differentiate the electrochemical activity. Cyclic voltammetry (CV) indeed shows noticeable differences between Pt supported over CeO2 and Pt doped CeO2. CeO2 alone has also shown different electrochemical behavior compared to the Pt containing CeO2. Considering oxygen evolution reaction (OER) as a model reaction, Tafel slope measurements are performed for CeO2, Pt supported over CeO 2 and Pt doped CeO2 to observe the differences. It was noted that CeO2 and Pt doped CeO2 showed similar Tafel slope indicating the same mechanism, while Pt supported over CeO2 showed different Tafel slopes, hence the different mechanism.

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