Two-Dimensional Metallic NiTe2 with Ultrahigh Environmental Stability, Conductivity, and Electrocatalytic Activity

作者:Shi, JP (Shi, Jianping)[ 1,2 ] ; Huan, YH (Huan, Yahuan)[ 1 ] ; Xiao, MM (Xiao, Mengmeng)[ 3 ] ; Hong, M (Hong, Min)[ 1 ] ; Zhao, XX (Zhao, Xiaoxu)[ 4 ] ; Gao, YL (Gao, Yinlu)[ 5 ] ; Cui, FF (Cui, Fangfang)[ 1 ] ; Yang, PF (Yang, Pengfei)[ 1 ] ; Pennycook, SJ (Pennycook, Stephen John)[ 4 ] ; Zhao, JJ (Zhao, Jijun)[ 5 ] ; Zhang, YF (Zhang, Yanfeng)[ 1 ]

ACS NANO

卷: 14 期: 7 页: 9011-9020

DOI: 10.1021/acsnano.0c03940

出版年: JUL 28 2020

文献类型:Article

摘要

Two-dimensional (2D) metallic transition metal dichalcogenides (MTMDCs) supply a versatile platform for investigating newfangled physical issues and developing potential applications in electronics/spintronics/electrocatalysis. Among these, NiTe2 (a type-II Dirac semimetal) possesses a Dirac point near its Fermi level. However, as-prepared 21) MTMDCs are mostly environmentally unstable, and little attention has been paid to synthesizing such materials. Herein, a general chemical vapor deposition (CVD) approach has been designed to prepare thickness-tunable and large-domain (similar to 1.15 mm) 1T-NiTe, on an atomically flat mica substrate. Significantly, ultrahigh conductivity (similar to 1.15 x 10(6) S m(-1)) of CVD-synthesized 1T-NiTe2 and high catalytic activity in pH-universal hydrogen evolution reaction have been uncovered. More interestingly, the 2D 1T-NiTe2 maintains robust environmental stability for more than one year and even after a variety of harsh treatments. These results hereby fill an existing research gap in synthesizing environmentally stable 2D MTMDCs, making fundamental progress in developing 2D MTMDC-based devices/catalysts.

关键词

作者关键词:NiTe2; chemical vapor deposition; environmental stability; conductivity; hydrogen evolution reaction

作者信息

通讯作者地址:

Peking University Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China.

Wuhan University Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China.

通讯作者地址: Shi, JP; Zhang, YF (通讯作者)

Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China.

通讯作者地址: Shi, JP (通讯作者)

Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China.

地址:

[ 1 ]‎ Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China

[ 2 ]‎ Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China

[ 3 ]‎ Peking Univ, Dept Elect, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China

[ 4 ]‎ Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117575, Singapore

[ 5 ]‎ Dalian Univ Technol, Key Lab Mat Modificat Laser Ion & Elect Beams, Dalian 116024, Peoples R China

电子邮件地址:jianpingshi@whu.edu.cn; yanfengzhang@pku.edu.cn