Malaysian Journal of Analytical Sciences Vol 23 No 1 (2019): 147 - 154

DOI: 10.17576/mjas-2019-2301-18






(Sifat Tindak Balas Penurunan Oksigen bagi Tiub Nanokarbon Disokong Mangkin Pt bagi Membran Penukaran Proton Sel Bahan Api)  


Md Ahsanul Haque1,2*, Abu Bakar Sulong1,3, Edy Herianto Majlan1, Kee Shyuan Loh1, Teuku Husaini1, Rosemilia Rosli1


1Fuel Cell Institute,

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia

2Department of Applied Chemistry and Chemical Engineering,

Islamic University, Kushtia-7003, Bangladesh

3Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment,

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia


*Corresponding author: 



Received: 13 April 2017; Accepted: 17 April 2018




Sluggish oxygen reduction reaction (ORR) in cathode electrode is the most common problem in Proton Exchange Membrane (PEM) fuel cell systems. In this study, the ORR behaviours of a half-cell in the cathodic part were investigated which had an impact on its catalyst activity. The electrode was synthesized from multi-walled carbon nanotubes (MWCNT) supported platinum (Pt) catalyst, assigned as MWCNT/Pt, using an impregnation method. In this case, the hexachloroplatinic acid (H2PtCl6.6H2O) acts as a Pt metal catalyst precursor. The PTFE (polytetrafloro-ethylene) was also used as sub-supporting material with MWCNT to produce MWCNT/PTFE composite. The Pt is deposited onto the surface of MWCNT/PTFE composite which forms MWCNT/PTFE/Pt electrode. Using CV and RRDE techniques, the electrochemical phenomena of MWCNT/Pt and MWCNT/PTFE/Pt electrodes in the 0.1 M KOH electrolyte solutions were analysed and compared. The electron transfer (n) from the K-L plot was recorded as 3.89 and 3.77 for MWCNT/Pt and MWCNT/PTFE/Pt electrode respectively. Based on the chronoamperometric analysis, the MWCNT/PTFE/Pt was found to be more stable than MWCNT/Pt. Therefore, the MWCNT/PTFE/Pt electrode may be recommended for PEM fuel cell application considering its electrochemical activity.  


Keywords:    oxygen reduction reaction, multi-walled carbon nanotube, cyclic voltammetry, chronoamperometric analysis



Kelembapan tindak balas penurunan oksigen (ORR) dalam katod elektrod adalah cabaran utama dalam sistem membran penukar proton (PEM) sel bahan api. Dalam kajian ini, tindak balas bagi ORR setengah-sel dikaji pada bahagian katod yang merupakan sebahagian daripada aktiviti pemangkin. Elektrod terhasil disintesis daripada tiub nanocarbon multi dinding (MWCNT) disokong pemangkin platinum (Pt) yang membentuk MWCNT/Pt dengan menggunakan kaedah pengisian. Dalam kes ini, asid heksakloroplatinik (H2PtCl6.6H2O) bertindak sebagai pemangkin logam Pt pelopor. PTFE (politetrafloro-etilena) juga digunakan sebagai bahan sokongan tambahan dengan MWCNT untuk menghasilkan MWCNT/PTFE komposit. Kemudian, Pt telah ditambah ke atas permukaan MWCNT/PTFE komposit yang membawa kepada pembentukan MWCNT/PTFE/Pt elektrod. Berdasarkan kaedah CV dan RRDE telah dianalisis dan dibandingkan fenomena elektrokimia dengan menggunakan kandungan larutan elektrolit 0.1 M KOH bagi setiap bahan MWCNT/Pt dan MWCNT/PTFE/Pt elektrod. Pemindahan elektron (n) dari plot K-L juga dikira dan direkodkan sebagai 3.89 bagi MWCNT/Pt dan 3.77 bagi MWCNT/PTFE/Pt elektrod. Berdasarkan analisis kronoamperometrik, MWCNT/PTFE/Pt adalah lebih stabil berbanding MWCNT/Pt. Oleh itu, elektrod MWCNT/PTFE/Pt adalah disyorkan untuk aplikasi PEM sel fuel dengan mengambilkira aktiviti elektrokimia.


Kata kunci:      tindak balas penurunan oksigen, karbon nanotiub berbilang, kitaran volmetrik, analisis kronoamperometrik



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