Title:	Harnessing dimethyl ether and methyl formate fuels for direct electrochemical energy conversion
Authors:	Gebremedhin Gebru, Medhanie Shyam Yadav, Radhey Teller, Hanan Kornweitz, Haya Subramanian, Palaniappan Schechter, Alexander
Citation:	GEBREMEDHIN GEBRU, M. SHYAM YADAV, R. TELLER, H. KORNWEITZ, H. SUBRAMANIAN, P. SCHECHTER, A. Harnessing dimethyl ether and methyl formate fuels for direct electrochemical energy conversion. Journal of Energy Chemistry, 2023, roč. 83, č. AUG 2023, s. 454-464. ISSN: 2095-4956
Issue Date:	2023
Publisher:	Elsevier
Document type:	článek article
URI:	2-s2.0-85160772075 http://hdl.handle.net/11025/53870
ISSN:	2095-4956
Keywords in different language:	dimethyl ether;methyl formate, fuel cell, electrocatalysis, multi-metallic alloy
Abstract in different language:	In this work, the oxidation of a mixture of dimethyl ether (DME) and methyl formate (MF) was studied in both an aqueous electrochemical cell and a vapor-fed polymer electrolyte membrane fuel cell (PEMFC) utilizing a multi-metallic alloy catalyst, Pt3Pd3Sn2/C, discovered earlier by us. The current obtained during the bulk oxidation of a DME-saturated 1 M MF was higher than the summation of the currents provided by the two fuels separately, suggesting the cooperative effect of mixing these fuels. A significant increase in the anodic charge was realized during oxidative stripping of a pre-adsorbed DME+MF mixture as compared to DME or MF individually. This is ascribed to greater utilization of specific catalytic sites leading to lower energy of the dual-fuel than of the sum of the individual molecules as confirmed by the density functional theory (DFT) calculations. Fuel cell polarization was also conducted using a Pt3Pd3Sn2/C (anode) and Pt/C (cathode) catalysts-coated membrane (CCM). The enhanced surface coverage and active site utilization resulted in providing a higher peak power density by the DME+MF mixture-fed fuel cell (123 mW cm−2 at 0. 45 V) than with DME (84 mW cm−2 at 0.35 V) or MF (28 mW cm−2 at 0.2 V) at the same total anode hydrocarbon flow rate, temperature under ambient pressure.
Rights:	Plný text je přístupný v rámci univerzity přihlášeným uživatelům © Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Appears in Collections:	Články / Articles OBD

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