Secondary Alcohols as Rechargeable Electrofuels: Electrooxidation of Isopropyl Alcohol at Pt Electrodes
Secondary Alcohols as Rechargeable Electrofuels: Electrooxidation of Isopropyl Alcohol at Pt Electrodes
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仲醇作为可充电电燃料:异丙醇在铂电极上的电氧化
DOI:
10.1021/acscatal.0c00818
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发表时间:
2020
期刊:
影响因子:
12.9
通讯作者:
J. Libuda
中科院分区:
文献类型:
--
作者:
F. Waidhas;S. Haschke;P. Khanipour;L. Fromm;A. Görling;J. Bachmann;I. Katsounaros;K.J.J. Mayrhofer;O. Brummel;J. Libuda
Fuel cells can be operated directly by oxidation of isopropyl alcohol (IPA) to acetone (ACE). If the product ACE is hydrogenated, IPA is formed again. In this way, IPA serves as a rechargeable electrofuel. In this work, we study the oxidation of IPA at Pt electrodes using several complementary experimental methods, including cyclic voltammetry (CV), electrochemical real-time mass spectrometry (EC-RTMS), and electrochemical infrared reflection absorption spectroscopy (EC-IRRAS), in combination with density functional theory (DFT) to assign the vibrational modes of IPA and ACE. Different types of Pt electrodes are investigated, namely single crystalline Pt(111) surfaces, polycrystalline Pt, and nanostructured tubular Pt electrodes. The onset of the IPA oxidation on the Pt electrodes is observed at 0.3 VRHE, yielding ACE with high selectivity. At potentials above 0.9 VRHE, the formation of Pt oxide inhibits the reaction. The only side reaction observed is the formation of small amounts of CO2. We show that adsorbed ACE is formed at the Pt electrodes poisoning the surface. On nanotubular electrodes with high surface area, ACE stays mainly adsorbed on the surface, and only a small fraction desorbs. These observations suggest that poisoning of the Pt electrode by adsorbed ACE limits the oxidation of IPA.
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DOI:
--
发表时间:
1997
期刊:
影响因子:
--
作者:
J. Gootzen;Ah Ad Wonders;W. Visscher;V. Veen
通讯作者:
V. Veen
DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
中村賀美;竹内孝江
通讯作者:
竹内孝江
DOI:
--
发表时间:
1982
期刊:
影响因子:
--
作者:
A. Wiȩckowski;P. Zelenay;M. Szklarczyk;J. Sobkowski
通讯作者:
J. Sobkowski
影响因子:
3
作者:
Laurin, Mathias
通讯作者:
Laurin, Mathias
影响因子:
3.9
作者:
Schuppert, Anna K.;Topalov, Angel A.;Mayrhofer, Karl J. J.
通讯作者:
Mayrhofer, Karl J. J.