Pt-Ir-SnO2/C Electrocatalysts for Ethanol Oxidation in Acidic Media

A series of Pt-Ir-SnO2 catalysts supported on carbon were synthesized by a modified Bönnemann method. An electrochemical study showed that the Pt-Ir0.07-SnO2/C catalyst had a three times higher ethanol oxidation current and a two times higher CO2 formation selectivity compared with the Pt/C catalyst under an application voltage of 0.5 V vs the RHE at 25 °C. This demonstrates that the Pt-Ir0.07-SnO2/C catalyst is a potentially ideal ethanol oxidation catalyst for direct ethanol fuel cells.

摘要采用改良的 Bönnemann 法合成了一系列新型炭载 Pt-Ir-SnO2 催化剂. 电化学结果表明, 在室温下新型电催化剂 Pt-Ir0.07-SnO2/C 可有效断裂乙醇中 C–C 键, 促进乙醇在低电位下完全氧化, 其 CO2 生成量为 Pt/C 催化剂的 2 倍. 另外, 该三元催化剂显著增强乙醇的氧化反应, 在室温下其电流密度为 Pt/C 的 3 倍.

Pt-Ir-SnO2/C nanoparticles gave far higher ethanol oxidation activity and selectivity toward CO2 formation compared with a Pt/C catalyst. Proper Ir loading plays a crucial role in the development of these catalysts.Figure optionsDownload as PowerPoint slide