CoOx(OH)2(1-x) doped with Sn urchin-like spheres for enhanced oxygen evolution reaction
CoOx(OH)2(1-x) doped with Sn urchin-like spheres for enhanced oxygen evolution reaction
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DOI：
10.1016/j.mssp.2020.104935
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发表时间：
2020-05
影响因子：
4.1
通讯作者：
Lina Sun;Cong Han;Ting Zhang;Hui Zhu;X. Xia;Ling Li
中科院分区：
文献类型：
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作者：
Lina Sun;Cong Han;Ting Zhang;Hui Zhu;X. Xia;Ling Li
设计高效稳定的电催化剂是增强析氧反应的关键。本文提出了一种水热法合成Sn掺杂CoOx(OH)2(1-x)(CoOx(OH)2(1-x)-Sn(IV))。在制备过程中，前体的形貌受到阴离子表面活性剂的控制。层状结构的前驱体主要是通过SDBS中的阴离子基团SO3H−与金属阳离子Co2+键合形成的，并且前驱体的表面积和反应位点明显增加。最后，水热合成了CoOx(OH)2(1-x)-Sn(IV)海胆状球。在1.95 V电位下获得的CoOx(OH)2(1-x)-Sn(IV)的电流密度为124.8 mA cm−2，即比前驱体(44.9 mA cm−2)高2.8倍。前驱体的塔菲尔斜率为 156.1 mV dec−1，即 CoOx(OH)2(1-x)-Sn(IV) (48.0 mV dec−1) 的 3.3 倍。
Designing an efficient and stable electrocatalyst is key for the enhanced oxygen evolution reaction. This paper proposes a hydrothermal method for synthesising Sn-doped CoOx(OH)2(1-x)(CoOx(OH)2(1-x)-Sn(Ⅳ)). During the preparation process, the morphology of the precursor was controlled by an anionic surfactant. The precursor of the layered structure was mainly formed through the bonding of anionic group SO3H−in SDBS with metal cation Co2+, and the surface area and reaction sites of the precursor were clearly increased. Finally, CoOx(OH)2(1-x)-Sn(Ⅳ) urchin-like spheres were hydrothermally synthesised. The current density of the CoOx(OH)2(1-x)-Sn(Ⅳ) obtained at a potential of 1.95 V was 124.8 mA cm−2, i.e. 2.8 times higher than that of the precursor (44.9 mA cm−2). The Tafel slope of the precursor was 156.1 mV dec−1, i.e. 3.3 times that of CoOx(OH)2(1-x)-Sn(Ⅳ) (48.0 mV dec−1).