Electrochemical oxidation of glucose and gluconate by an electrode modified with a carbon-supported Rh phthalocyanine
Electrochemical oxidation of glucose and gluconate by an electrode modified with a carbon-supported Rh phthalocyanine
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DOI：
10.1016/j.molcata.2016.10.012
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发表时间：
2016-12
影响因子：
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通讯作者：
S. Yamazaki;Z. Siroma;N. Fujiwara;Tsutomu Ioroi
中科院分区：
文献类型：
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作者：
S. Yamazaki;Z. Siroma;N. Fujiwara;Tsutomu Ioroi
在碱性溶液中，碳负载的Rh酞菁催化葡萄糖的电氧化反应。与其他传统的钴基催化剂相比，该催化剂的氧化过电位更低。这种电催化氧化与Rh的氧化还原电势相耦合。给电子基的引入导致氧化还原电位负移，降低了葡萄糖氧化的起始电位。在葡萄糖的催化氧化之前，需要活化Rh酞菁催化剂。这种活化是通过将催化剂暴露在负电位下实现的。该催化剂还氧化葡萄糖酸盐，这可能是葡萄糖的两电子氧化产物。对葡萄糖溶液的电解实验表明，葡萄糖在Rh酞菁的作用下发生了多电子(2个以上)氧化。
A carbon-supported Rh phthalocyanine catalyzed the electro-oxidation of glucose in basic solution. The overpotentials for the oxidation are lower than those with other conventional Co phthalocyanine-based catalysts. This electrocatalytic oxidation is coupled with the redox potential of Rh phthalocyanine. The introduction of an electron-donating group causes negative shift in the redox potential, and decreases the onset potential for the oxidation of glucose. The Rh phthalocyanine catalyst needs activation before the catalytic oxidation of glucose. This activation is achieved by the exposure of the catalyst to negative potentials. This catalyst also oxidizes gluconate, which is a possible 2-electron oxidation product of glucose. Electrolysis of glucose solution shows that glucose undergoes multi-electron (more than 2) oxidation by the Rh phthalocyanine.