Non-catalytic hydrogenation of VO2 in acid solution

被引：104

作者：

Chen, Yuliang ^{[1
]}

Wang, Zhaowu ^{[2
,3
]}

Chen, Shi ^{[1
]}

Ren, Hui ^{[1
]}

Wang, Liangxin ^{[1
]}

Zhang, Guobin ^{[1
]}

Lu, Yalin ^{[1
]}

Jiang, Jun ^{[2
]}

Zou, Chongwen ^{[1
]}

Luo, Yi ^{[2
]}

机构：

[1] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China

[2] Univ Sci & Technol China, Sch Chem & Mat Sci, Hefei Natl Lab Phys Sci Microscale, Collaborat Innovat Ctr Chem Energy Mat,CAS Ctr Ex, Hefei 230026, Anhui, Peoples R China

[3] Henan Univ Sci & Technol, Sch Phys & Engn, Henan Key Lab Photoelect Energy Storage Mat & App, Luoyang 471023, Henan, Peoples R China

来源：

NATURE COMMUNICATIONS | 2018年 / 9卷

基金：

中国国家自然科学基金;

关键词：

METAL-INSULATOR-TRANSITION; VANADIUM DIOXIDE; AB-INITIO; PHASE; STABILIZATION; DIFFUSION; DRIVEN;

D O I：

10.1038/s41467-018-03292-y

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Hydrogenation is an effective way to tune the property of metal oxides. It can conventionally be performed by doping hydrogen into solid materials with noble-metal catalysis, high-temperature/pressure annealing treatment, or high-energy proton implantation in vacuum condition. Acid solution naturally provides a rich proton source, but it should cause corrosion rather than hydrogenation to metal oxides. Here we report a facile approach to hydrogenate monoclinic vanadium dioxide (VO2) in acid solution at ambient condition by placing a small piece of low workfunction metal (Al, Cu, Ag, Zn, or Fe) on VO2 surface. It is found that the attachment of a tiny metal particle (similar to 1.0 mm) can lead to the complete hydrogenation of an entire wafer-size VO2 (>2 inch). Moreover, with the right choice of the metal a two-step insulator-metal-insulator phase modulation can even be achieved. An electron-proton co-doping mechanism has been proposed and verified by the first-principles calculations.

引用

页数：8

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