Synergetic electrocatalytic activities towards hydrogen peroxide: Understanding the ordered structure of PdNi bimetallic nanocatalysts

被引：13

作者：

Tan-Thanh Huynh ^{[1
,2
]}

Tsai, Meng-Che ^{[1
]}

Pan, Chun-Jern ^{[1
]}

Su, Wei-Nien ^{[3
]}

Chan, Ting-Shan ^{[4
]}

Lee, Jyh-Fu ^{[4
]}

Hwang, Bing-Joe ^{[1
,4
,5
]}

机构：

[1] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, NanoElectrochem Lab, Taipei 106, Taiwan

[2] Tra Vinh Univ, Tra Vinh, Vietnam

[3] Natl Taiwan Univ Sci & Technol, Grad Inst Appl Sci & Technol, NanoElectrochem Lab, Taipei 106, Taiwan

[4] Natl Taiwan Univ Sci & Technol, Appl Res Ctr Thin Film Metall Glass, Taipei 10607, Taiwan

[5] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2019年 / 101卷

关键词：

Direct synthesis of H2O2; Face-centered tetragonal; Ordered structure; Palladium-; nickel; DIRECT OXIDATION; H2O2; H-2; CATALYSTS; O-2; NANOPARTICLES; KINETICS; OXYGEN; AL2O3; SIZE;

D O I：

10.1016/j.elecom.2019.02.009

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Mesoporous carbon-template-supported novel-order face-centered cubic (fcc) structured bimetallic PdNi nanocatalysts were prepared for the 'green synthesis' of hydrogen peroxide (H2O2). Our results show that the alloy crystal structure of fcc-Pd050Ni050 can be structurally transformed into a face-centered tetragonal (fct) structure after hydrogen-assisted heat-treatment at 750 degrees C. Transformation of the fcc structure into the fct structure resulted in ordered intermetallically structured Pd050Ni050 alloys with higher alloying extents as confirmed by X-ray absorption spectroscopy (XAS) and high resolution TEM. In addition, an electrochemical detection method was developed for in situ measurement of direct H2O2 synthesis. The fct-Pd050Ni050 catalysts produced demonstrated both enhanced structural stability and higher productivity than the fcc structured nanocatalysts and in doing so potentially offer a cost-effective route to the direct synthesis of hydrogen peroxide.

引用

页码：93 / 98

页数：6

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