Nanostructured 3D-porous graphene hydrogel based Ti/Sb-SnO2-Gr electrode with enhanced electrocatalytic activity
Nanostructured 3D-porous graphene hydrogel based Ti/Sb-SnO2-Gr electrode with enhanced electrocatalytic activity
复制标题
基于纳米结构3D多孔石墨烯水凝胶的Ti/Sb-SnO2-Gr电极具有增强的电催化活性
DOI：
10.1016/j.chemosphere.2016.11.119
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发表时间：
2017-02-01
期刊：
影响因子：
8.8
通讯作者：
Wang, Chuanyi
中科院分区：
文献类型：
--
作者：
Asim, Sumreen;Zhu, Yunqing;Wang, Chuanyi
基于三维多孔石墨烯水凝胶，采用层层沉积快速蒸发法制备了纳米级高孔度3D-Ti/Sb-SnO2-Gr电极。扫描电子显微镜分析表明，3D孔洞均匀分布在高保真度的衬底上，孔径为7~12 nm。与Ti/Sb-SnO2电极相比，制备的3D多孔电极具有较高的析氧电位(2.40V)、较小的电荷转移电阻(29.40欧米伽cm(-2))、较高的孔隙率(0.90)、较高的粗糙度(181)和较大的伏安电荷值(57.4mC/cm(-2))。通过对罗丹明B(RhB)的电化学催化氧化，评价了所制备的3D-Ti/Sb-SnO2-Gr阳极的氧化效率。结果表明，电化学反应符合准一级动力学，反应速率常数k=4.93×10~(-2)min~(-1)，约为平面Ti/Sb-SnO_2的3.91倍。制备的电极具有较好的稳定性和较低的比能耗，在电催化领域具有潜在的应用前景。(C)2016爱思唯尔有限公司。保留所有权利。
Nanostructured highly porous 3D-Ti/Sb-SnO2-Gr electrode, based on 3D porous graphene hydrogel was fabricated via a fast-evaporation technique through layer by layer (LBL) deposition. The 3D pores are uniformly distributed on the high fidelity of substrate with pore sizes of 7-12 nm, as confirmed by SEM analysis. Compared to Ti/Sb-SnO2 electrode, the fabricated 3D porous electrode possesses high oxygen evolution potential (2.40 V), smaller charge transfer resistance (29.40 Omega cm(-2)), higher porosity (0.90), enhanced roughness factor (181), and larger voltammetric charge value (57.4 mC cm(-2)). Efectrocatalytic oxidation of Rhodamine B (RhB) was employed to evaluate the efficiency of the fabricated 3D-Ti/Sb-SnO2-Gr anode. The results show that the electrochemical reaction follows pseudo first order kinetics with rate constant (k) value of 4.93 x 10(-2) min(-1), which is about 3,91 times higher compared to flat Ti/Sb-SnO2. The fabricated electrode demonstrates better stability and low specific energy consumption signifying its potential usage in electrocatalysis. (C) 2016 Elsevier Ltd. All rights reserved.