Nanostructured Tin Catalysts for Selective Electrochemical Reduction of Carbon Dioxide to Formate
Nanostructured Tin Catalysts for Selective Electrochemical Reduction of Carbon Dioxide to Formate
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DOI：
10.1021/ja4113885
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发表时间：
2014-02-05
影响因子：
15
通讯作者：
Meyer, Thomas J.
中科院分区：
文献类型：
--
作者：
Zhang, Sheng;Kang, Peng;Meyer, Thomas J.
采用水热法制备了高比表面积的氧化锡纳米晶，考察了其对CO2还原为甲酸盐的电催化性能。在这些新型纳米结构的锡催化剂中，CO2还原选择性地发生在低至类似于340 mV的过电位下的甲酸盐。在NaHCO 3水溶液中，甲酸盐生产的最大法拉第效率已达到> 93%，具有高稳定性和石墨烯载体上> 10 inA/cm（2）的电流密度。这里实现的显著的对CO2还原的反应性可能产生于CO2中心点和纳米级锡表面之间的相互作用的强度与随后的对质子化和进一步还原的动力学活化之间的折衷。
High surface area tin oxide nanocrystals prepared by a facile hydrothermal method are evaluated as electrocatalysts toward CO2 reduction to formate. At these novel nanostructured tin catalysts, CO2 reduction occurs selectively to formate at overpotentials as low as similar to 340 mV. In aqueous NaHCO3 solutions, maximum Faradaic efficiencies for formate production of > 93% have been reached with high stability and current densities of > 10 inA/cm(2) on graphene supports. The notable reactivity toward CO2 reduction achieved here may arise from a compromise between the strength of the interaction between CO2 center dot- and the nanoscale tin surface and subsequent kinetic activation toward protonation and further reduction.