Atomic H-Induced Mo2C Hybrid as an Active and Stable Bifunctional Electrocatalyst

被引：191

作者：

Fan, Xiujun ^{[1
,2
,4
,5
]}

Liu, Yuanyue ^{[7
,8
]}

Peng, Zhiwei ^{[4
]}

Zhang, Zhenhua ^{[3
]}

Zhou, Haiqing ^{[4
,5
]}

Zhang, Xianming ^{[1
]}

Yakobson, Boris I. ^{[1
,4
,5
]}

Goddard, William A., III ^{[7
]}

Guo, Xia ^{[2
,9
]}

Hauge, Robert H. ^{[4
,5
]}

Tour, James M. ^{[4
,5
,6
]}

机构：

[1] Shanxi Univ, Inst Crystalline Mat, Taiyuan 030006, Shanxi, Peoples R China

[2] Beijing Univ Technol, Coll Elect Informat & Control Engn, Beijing 100124, Peoples R China

[3] Beijing Univ Technol, Inst Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China

[4] Rice Univ, Dept Chem, Houston, TX 77005 USA

[5] Rice Univ, NanoCarbon Ctr, Houston, TX 77005 USA

[6] Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 USA

[7] CALTECH, Mat & Proc Simulat Ctr, Pasadena, CA 91125 USA

[8] CALTECH, Resnick Sustainabil Inst, Pasadena, CA 91125 USA

[9] Beijing Univ Posts & Telecommun, Sch Elect Engn, Beijing 100876, Peoples R China

来源：

ACS NANO | 2017年 / 11卷 / 01期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

Mo2C; graphene nanoribbon; hydrogen-evolution reaction; oxygen-reduction reaction; atomic H; HYDROGEN EVOLUTION REACTION; MOLYBDENUM-CARBIDE; OXYGEN REDUCTION; EFFICIENT ELECTROCATALYST; CARBON NANOTUBES; HIGHLY EFFICIENT; NANOPARTICLES; GRAPHENE; CARBURIZATION; NANOWIRES;

D O I：

10.1021/acsnano.6b06089

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

Mo2C nanocrystals (NCs) anchored on vertically aligned graphene nanoribbons (VA-GNR) as hybrid nanoelectrocatalysts (Mo2C-GNR) are synthesized through the direct carbonization of metallic Mo with atomic H treatment. The growth mechanism of Mo2C NCs with atomic H treatment is discussed. The Mo2C-GNR hybrid exhibits highly active and durable electrocatalytic performance for the hydrogen-evolution reaction (HER) and oxygen-reduction reaction (ORR). For HER, in an acidic solution the Mo2C-GNR has an onset potential of 39 mV and a Tafel slope of 65 mV dec(-1), and in a basic solution Mo2C-GNR has an onset potential of 53 mV, and Tafel slope of 54 mV dec(-1). It is stable in both acidic and basic media. Mo2C-GNR is a high-activity ORR catalyst with a high peak current density of 2.01 mA cm(-2), an onset potential of 0.93 V that is more positive vs reversible hydrogen electrode (RHE), a high electron transfer number n (similar to 3.90), and long-term stability.

引用

页码：384 / 394

页数：11

共 54 条

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