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锚定在石墨烯纳米片上的超长硒化镍纳米线用于增强三碘化物还原的电催化性能。

Ultralong NiSe nanowire anchored on graphene nanosheets for enhanced electrocatalytic performance of triiodide reduction.

作者信息

Yang Fengxia, Mu Meirui, Zhang Keqiang

机构信息

Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs Tianjin 300191 China

出版信息

RSC Adv. 2021 Aug 16;11(44):27681-27688. doi: 10.1039/d1ra04367f. eCollection 2021 Aug 9.

DOI:10.1039/d1ra04367f
PMID:35480657
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9038013/
Abstract

Like their higher-dimensional counterparts, nanowire structures possess desirable features for electrocatalysis applications. In this study, ultralong NiSe nanowires (of diameters 50-150 nm and length 20 μm) were successfully anchored onto graphene nanosheets (NiSe NW/RGO). The NiSe nanowires were coated with a thick (∼10 nm) disordered surface replete with active sites. Benefiting from the fast charge-transfer channels and plentiful electroactive sites on the NiSe nanowires, in synergy with the high electroactive surface and electrical conductivity of the graphene nanosheets, the optimized NiSe NW/RGO exhibited a remarkably higher electrocatalytic activity than NiSe nanowires and typical Pt counter-electrodes (CEs). NiSe NW/RGO also exhibited the low charge-transfer resistance of 1.64 Ω cm and delivered a higher power conversion efficiency (PCE = 7.99%) than Pt CEs (PCE = 7.76%).

摘要

与它们的高维对应物一样，纳米线结构具有电催化应用所需的特性。在本研究中，超长NiSe纳米线（直径50 - 150 nm，长度20μm）成功地锚定在石墨烯纳米片上（NiSe NW/RGO）。NiSe纳米线涂覆有一层厚约10 nm的无序表面，富含活性位点。得益于NiSe纳米线上快速的电荷转移通道和丰富的电活性位点，与石墨烯纳米片的高电活性表面和电导率协同作用，优化后的NiSe NW/RGO表现出比NiSe纳米线和典型的铂对电极（CEs）显著更高的电催化活性。NiSe NW/RGO还表现出1.64Ω cm的低电荷转移电阻，并且比铂对电极（PCE = 7.76%）具有更高的功率转换效率（PCE = 7.99%）。

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