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首页> 外文期刊>RSC Advances >Different mechanisms and electrocatalytic activities of Ce ion or CeO2 modified Ti/Sb-SnO2 electrodes fabricated by one-step pulse electro-codeposition
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Different mechanisms and electrocatalytic activities of Ce ion or CeO2 modified Ti/Sb-SnO2 electrodes fabricated by one-step pulse electro-codeposition

机译：单步脉冲电共沉积制备Ce离子或CeO2修饰的Ti / Sb-SnO2电极的不同机理和电催化活性

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摘要

Sb-doped SnO2 electrode was fabricated by the one-step pulse electro-codeposition method, and was modified through either cerium dioxide nanoparticle (nano-CeO2) or cerium ion doping. The results showed that the effects of nano-CeO2 doping and cerium ion doping are quite different. Nano-CeO2 doping shrinks the unit cell volume, improves the degree of crystallinity and refines crystalline grains, while cerium ion doping expands the volume and deteriorates the crystallinity. Nano-CeO2 doping mitigates the surface antimony enrichment and promotes the complete oxidation of antimony so that the majority of antimony oxidation states exist as the Sb5+ state, but cerium ion doping aggravates the enrichment and increases the Sb3+ content. Electrochemical phenol degradation showed that the Ti/Sb-SnO2-CeO2 electrode has a higher degradation efficiency and its kinetic rate constant is 1.46 times as much as that of Ti/Ce-Sb-SnO2. Besides, due to the compact active layer of Ti/Sb-SnO2-CeO2 protecting the titanium substrate from passivation, the accelerated service lifetime of Ti/Sb-SnO2-CeO2 is prolonged, which is 1.28 times as long as that of Ti/Ce-Sb-SnO2.
机译：通过一步脉冲电共沉积法制备了掺锑的SnO2电极，并通过二氧化铈纳米粒子（nano-CeO2）或铈离子掺杂对其进行了改性。结果表明，纳米CeO2掺杂和铈离子掺杂的效果差异很大。纳米CeO2掺杂会缩小晶胞体积，提高结晶度并细化晶粒，而铈离子掺杂会扩大晶胞体积并降低结晶度。纳米CeO2掺杂减轻了表面锑的富集并促进了锑的完全氧化，因此大多数锑的氧化态以Sb5 +状态存在，但是铈离子掺杂加剧了富集并增加了Sb3 +含量。电化学苯酚降解表明，Ti / Sb-SnO2-CeO2电极具有更高的降解效率，其动力学速率常数为Ti / Ce-Sb-SnO2的1.46倍。此外，由于Ti / Sb-SnO2-CeO2的致密有源层保护了钛基板不受钝化，因此延长了Ti / Sb-SnO2-CeO2的加速使用寿命，是Ti / Ce的1.28倍。 -Sb-SnO2

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