Engineering grain boundaries at the 2D limit for the hydrogen evolution reaction

Atom-thin transition metal dichalcogenides (TMDs) have emerged as fascinating materials and key structures for electrocatalysis. So far, their edges, dopant heteroatoms and defects have been intensively explored as active sites for the hydrogen evolution reaction (HER) to split water. However, grain...

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Detalles Bibliográficos
Autores: He, Yongmin|||0000-0002-9347-930X, Tang, PengYi|||0000-0002-2306-095X, Hu, Zhili, He, Qiyuan|||0000-0001-9083-8285, Zhu, Chao|||0000-0002-1589-855X, Wang, Luqing, Zeng, Qingsheng, Golani, Prafful, Gao, Guanhui, Fu, Wei, Huang, Zhiqi, Gao, Caitian, Xia, Juan, Wang, Xingli, Wang, Xuewen, Ramasse, Quentin|||0000-0001-7466-2283, Zhang, Ao|||0000-0002-9427-9641, An, Boxing, Zhang, Yongzhe, Martí-Sánchez, Sara|||0000-0003-4283-1489, Morante, Joan Ramon|||0000-0002-4981-4633, Wang, Liang|||0000-0002-3771-4627, Tay, Beng Kang|||0000-0002-3776-3648, Yakobson, Boris I., Trampert, Achim|||0000-0001-7949-643X, Zhang, Hua|||0000-0001-9518-740X, Wu, Minghong|||0000-0002-9776-671X, Wang, Qi Jie|||0000-0002-9910-1455, Arbiol i Cobos, Jordi|||0000-0002-0695-1726, Liu, Zheng|||0000-0002-8825-7198
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:226161
Acceso en línea:https://ddd.uab.cat/record/226161
https://dx.doi.org/urn:doi:10.1038/s41467-019-13631-2
Access Level:acceso abierto
Palabra clave:Catalyst synthesis
Electrocatalysis
Two-dimensional materials
Descripción
Sumario:Atom-thin transition metal dichalcogenides (TMDs) have emerged as fascinating materials and key structures for electrocatalysis. So far, their edges, dopant heteroatoms and defects have been intensively explored as active sites for the hydrogen evolution reaction (HER) to split water. However, grain boundaries (GBs), a key type of defects in TMDs, have been overlooked due to their low density and large structural variations. Here, we demonstrate the synthesis of wafer-size atom-thin TMD films with an ultra-high-density of GBs, up to ~10 12 cm -2. We propose a climb and drive 0D/2D interaction to explain the underlying growth mechanism. The electrocatalytic activity of the nanograin film is comprehensively examined by micro-electrochemical measurements, showing an excellent hydrogen-evolution performance (onset potential: -25 mV and Tafel slope: 54 mV dec -1), thus indicating an intrinsically high activation of the TMD GBs.

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