Electrochemical modification of CH3OH oxidation selectivity and activity on a Pt single-pellet catalytic reactor
Electrochemical modification of CH3OH oxidation selectivity and activity on a Pt single-pellet catalytic reactor
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Pt 单丸催化反应器上 CH3OH 氧化选择性和活性的电化学修饰
DOI：
10.1021/j100125a005
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
G. L. Haller
中科院分区：
文献类型：
--
作者：
C. Cavalca;G. Larsen;C. Vayenas;G. L. Haller
研究发现，在钇稳定的二氧化锆（YSZ）圆盘上沉积Pt催化剂膜，并在催化剂膜与沉积在o2导电的YSZ圆盘另一面的Ag膜之间施加电流或电势，可以显著地改变Pt对甲醇氧化成甲醛和CO 2的催化活性和选择性。催化剂膜和银计数电极和参比电极都暴露在反应的ch3oh - o2混合物中。所观察到的h2co生成速率的增加通常比向催化剂提供o2的速率高100倍，同时选择性增加2倍
It was found that the catalytic activity and selectivity of Pt for the oxidation of methanol to formaldehyde and CO 2 can be altered significantly and reversibly by depositing a Pt catalyst film on an yttria-stabilized zirconia (YSZ) disc and by applying current or potential between the catalyst film and a Ag film deposited on the other side of the O 2 -conducting YSZ disc. Both the catalyst film and the Ag counter and reference electrodes are exposed to the reacting CH 3 OH-O 2 mixture. The observed increase in the rate of H 2 CO production was typically a factor of 100 higher than the rate of O 2 -supply to the catalyst with a concomitant 2-fold increase in selectivity