Facile charge transfer in fibrous PdPt bimetallic nanocube counter electrodes

Muhamad Adam Ramli, Siti Khatijah Md Saad, Elvy Rahmi Mawarnis, Marjoni Imamora Ali Umar, P. Susthitha Menon N V Visvanathan, Mohd Yusri Abd Rahman, Ali Umar Akrajas

Research output: Contribution to journalArticle

Abstract

The nature of the physicochemical processes and the surface reactivity of a counter electrode (CE) are determined by its surface atomic composition and area. In this paper, we investigated the role of Pd atom concentration in the electrocatalytic properties of poriferous bimetallic PdPt nanostructured CEs in dye-sensitized solar cell (DSSC) devices. It was found that the physicochemical properties and surface reactivity, which are reflected by the charge transfer resistance and electrocatalytic properties, increased with increasing Pd atom concentration and were optimum at a concentration of 2.5 mM. The DSSC device fabricated using the optimum bimetallic PdPt nanostructures produced short circuit current (Jsc), open circuit voltage (Voc) and fill factor (FF) values as high as 9.52 mA cm-2, 0.63 V and 0.37 respectively, which correspond to a power conversion efficiency (PCE) value of up to 2.22%. This is twofold higher than the PCE of a device utilizing a pristine Pt CE (1.11%). The performance enhancement is attributed to the unique surface physicochemical properties of the prepared CE due to the poriferous structure with its large surface area and bimetallization. The synthesis and device characterization are discussed in detail.

Original languageEnglish
Pages (from-to)11148-11156
Number of pages9
JournalNew Journal of Chemistry
Volume43
Issue number28
DOIs
Publication statusPublished - 1 Jan 2019

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Charge transfer
Electrodes
Conversion efficiency
Atoms
Open circuit voltage
Short circuit currents
Surface properties
Nanostructures
Chemical analysis
Dye-sensitized solar cells

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Materials Chemistry

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Facile charge transfer in fibrous PdPt bimetallic nanocube counter electrodes. / Ramli, Muhamad Adam; Saad, Siti Khatijah Md; Mawarnis, Elvy Rahmi; Ali Umar, Marjoni Imamora; N V Visvanathan, P. Susthitha Menon; Abd Rahman, Mohd Yusri; Akrajas, Ali Umar.

In: New Journal of Chemistry, Vol. 43, No. 28, 01.01.2019, p. 11148-11156.

Research output: Contribution to journalArticle

Ramli, Muhamad Adam ; Saad, Siti Khatijah Md ; Mawarnis, Elvy Rahmi ; Ali Umar, Marjoni Imamora ; N V Visvanathan, P. Susthitha Menon ; Abd Rahman, Mohd Yusri ; Akrajas, Ali Umar. / Facile charge transfer in fibrous PdPt bimetallic nanocube counter electrodes. In: New Journal of Chemistry. 2019 ; Vol. 43, No. 28. pp. 11148-11156.
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