Abstract
A facile one pot synthesis route has been adopted for Pd@CuO/C core-shell nanostructure for ethylene glycol oxidation. Pd nanoparticles are embedded in the porous CuO shell through an intermediate redox reaction leading to the formation of Pd@CuO/C core-shell nanostructure. The crystallinity, surface chemistry, bonding environment, morphology and surface area of the synthesized nanostructure has been characterised by X-ray diffraction, X-ray photoelectron spectroscopy, X-ray absorbance spectroscopy, transmission electron microscopy, and Brunauer-Emmett-Teller analysis. The observed results indicated that a uniform dispersion of Pd@CuO core-shell nanostructure on functionalised carbon have an average size of ~8.5 nm. The nanostructure of Pd covered by a CuO enriched shell in carbon support (Pd@CuO/C) shows enhanced electro-catalytic performance, e.g. 2.3 times forward peak current density, 2.9 times mass activity, and 2 times specific activity towards ethylene glycol oxidation in alkaline media than that by Pd/C. The onset potential is 110 mV more negative in Pd@CuO/C than Pd/C. Further, Pd@CuO/C exhibit much lower Tafel slope (96.34 mV/dec) and charge transfer resistance (Rct) than Pd/C, signifying faster charge transport in ethylene glycol oxidation reaction. The enhancement of electrocatalytic activity, excellent stability and durability towards ethylene glycol oxidation in Pd@CuO/C compared to different types of Pd nano, bimetallic and different substrate is attributed to the modification of the electronic structure of Pd and CuO due to the formation of core-shell nanostructure.
| Original language | English |
|---|---|
| Article number | 115006 |
| Journal | Journal of Electroanalytical Chemistry |
| Volume | 882 |
| DOIs | |
| State | Published - 1 Feb 2021 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2021 Elsevier B.V.
Funding
The authors are thankful to Department of Science and Technology (DST) for financial support through Indo-Taiwan project. A. Mukherjee is thankful to Science and Engineering Research board (SERB) for providing NPDF. The work is also supported by the Ministry of Science and Technology (MOST) ( 104-3113-E-011-002 , 104-2923-M-011 -002 -MY3 , 104-2911-I-011 -505 -MY2 ), and the Top University Projects of Ministry of Education (MOE) ( 100H451401 ). The authors would like to acknowledge the facility supports from the National Synchrotron Radiation Research Center (NSRRC) , National Tsing Hua University (NTHU) and National Taiwan University of Science and Technology (NTUST). The authors are thankful to Department of Science and Technology (DST) for financial support through Indo-Taiwan project. A. Mukherjee is thankful to Science and Engineering Research board (SERB) for providing NPDF. The work is also supported by the Ministry of Science and Technology (MOST) (104-3113-E-011-002, 104-2923-M-011 -002 -MY3, 104-2911-I-011 -505 -MY2), and the Top University Projects of Ministry of Education (MOE) (100H451401). The authors would like to acknowledge the facility supports from the National Synchrotron Radiation Research Center (NSRRC), National Tsing Hua University (NTHU) and National Taiwan University of Science and Technology (NTUST).
| Funders | Funder number |
|---|---|
| Science and Engineering Research Board | |
| Ministry of Science and Technology | |
| Ministry of Education, India | 100H451401 |
| Ministry of Science and Technology, Taiwan | 104-3113-E-011-002, 104-2911-I-011 -505 -MY2, 104-2923-M-011 -002 -MY3 |
| National Tsing Hua University | |
| National Taiwan University of Science and Technology | |
| Science and Technology Department of Tibet |
Keywords
- Core-shell catalyst
- Electrocatalyst
- Ethylene glycol fuel cell
- Ethylene glycol oxidation
- Palladium-CuO catalyst