Clean hydrogen generation through the electrocatalytic oxidation of ethanol in a Proton Exchange Membrane Electrolysis Cell (PEMEC): Effect of the nature and structure of the catalytic anode
Clean hydrogen generation through the electrocatalytic oxidation of ethanol in a Proton Exchange Membrane Electrolysis Cell (PEMEC): Effect of the nature and structure of the catalytic anode
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DOI：
10.1016/j.jpowsour.2013.07.028
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发表时间：
2014-01-01
影响因子：
9.2
通讯作者：
Coutanceau, Christophe
中科院分区：
文献类型：
--
作者：
Lamy, Claude;Jaubert, Thomas;Coutanceau, Christophe
在质子交换膜电解电池（PEMEC）中，采用Pt/C、PtSn/C、PtSnRu/C三种Pt基催化剂，在低温（20℃）条件下对乙醇进行了电催化氧化，目的是通过电解生物质化合物制备非常清洁的氢气。用循环伏安法测定了各催化剂在不同电流密度下的电催化活性和析氢速率。记录各电流密度下电池电压U-EtOH随时间的变化。在100 mA cm(-2)，即0.5 A，使用5 cm(2)表面积的PEMEC时，电池电压不超过0.9 V，每小时产生约220 cm(3)的氢气，消耗的电能小于2.3 kWh (Nm(3))(-1)，即不到水电解所需能量的一半(U-H2O = 2 V时4.7 kWh (Nm（3))(-1)）。这一结果适用于任何有机化合物的分解，特别是那些来自生物质资源的有机化合物，只要它们在相对较低的电池电压（U-cell < 1 V）下具有足够的电氧化速率（>100 mA cm(-2)），这就需要开发有效的电催化剂来进行该化合物的电化学分解。(C) 2013 Elsevier B.V.版权所有
The electrocatalytic oxidation of ethanol was investigated in a Proton Exchange Membrane Electrolysis Cell (PEMEC) working at low temperature (20 degrees C) on several Pt-based catalysts (Pt/C, PtSn/C, PtSnRu/C) in order to produce very clean hydrogen by electrolysis of a biomass compound. The electrocatalytic activity was determined by cyclic voltammetry and the rate of hydrogen evolution was measured for each catalyst at different current densities. The cell voltages U-EtOH were recorded as a function of time for each current density. At 100 mA cm(-2), i.e. 0.5 A with the 5 cm(2) surface area PEMEC used, the cell voltage did not exceed 0.9 V for an evolution rate of about 220 cm(3) of hydrogen per hour and the electrical energy consumed was less than 2.3 kWh (Nm(3))(-1), i.e. less than one half of the energy needed for water electrolysis (4.7 kWh (Nm(3))(-1) at U-H2O = 2 V). This result is valid for the decomposition of any organic compound, particularly those originated from biomass resource, provided that their electro-oxidation rate is sufficient (>100 mA cm(-2)) at a relatively low cell voltage (U-cell < 1 V) which necessitates the development of efficient electrocatalysts for the electrochemical decomposition of this compound. (C) 2013 Elsevier B.V. All rights reserved.