Please use this identifier to cite or link to this item:
http://hdl.handle.net/123456789/4964
Title: | Unravelling charge-transfer in Pd to pyrrolic-N bond for superior electrocatalytic performance |
Authors: | Sahoo, Lipipuspa Mondal, Sanjit Gloskovskii, A. Chutia, Arunabhiram Gautam, Ujjal K. |
Keywords: | charge-transfer pyrrolic-N |
Issue Date: | 2021 |
Publisher: | Publishing |
Citation: | Journal of Materials Chemistry A, 9(17), 10966–10978. |
Abstract: | Fuel-cells require large quantities of Pt for oxygen reduction reaction (ORR) to subvert the activity-loss during prolonged use. Pd can complement Pt in the near future by exhibiting a similar activity and stability in alkaline fuel-cells. Herein we show that by depositing Pd atom-by-atom on an N-doped reduced graphene oxide (NRGO), it is possible to create a strong bond between Pd and pyrrolic-fraction of the N-moieties. This bond further strengthens in the presence of an oxygen containing functional-group accompanied by a profound charge-transfer from the Pd 3d-orbitals to the 2p-orbitals of C, N and O, thereby lowering the Pd-3d binding-energy and the resulting Pd/NRGO exhibits a very high ORR activity (E1/2 = 0.93 V vs. RHE) and stability (ΔE1/2 = 0.013 V after 15 000 cycles). Usually pyridinic-N is considered for imparting high-performance while N-doping creates nearly as many pyrrolic-N in graphene-substrates, the role of which is evidenced in this study. |
Description: | Only IISERM authors are available in the record. |
URI: | https://pubs.rsc.org/en/content/articlelanding/2021/TA/D0TA12618G http://hdl.handle.net/123456789/4964 |
Appears in Collections: | Research Articles |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Need To Add…Full Text_PDF | 15.36 kB | Unknown | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.