Intermetallic Pd3X(X= Ti and Zr) nanocrystals for electro-oxidation of alcohols and formic acid in alkaline and acidic media

被引：9

作者：

Kodiyath, Rajesh ^{[1
]}

V. Ramesh, Gubbala ^{[1
,2
]}

Manikandan, Maidhily ^{[1
]}

Ueda, Shigenori ^{[3
]}

Fujita, Takeshi ^{[4
]}

Abe, Hideki ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Ctr Green Res Energy & Environm Mat, Tsukuba, Ibaraki, Japan

[2] Chaitanya Bharathi Inst Technol A, Dept Chem, Hyderabad, Telangana, India

[3] Natl Inst Mat Sci, Synchrotron Xray Stn SPring 8, Sayo, Hyogo, Japan

[4] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi, Japan

来源：

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS | 2020年 / 21卷 / 01期

基金：

日本学术振兴会;

关键词：

Pd3Ti nanoparticles; Pd3Zr nanoparticles; intermetallic compounds; electro-oxidation; fuel cells; PHOTOELECTRON ANGULAR-DISTRIBUTION; ELECTROCATALYTIC ACTIVITY; FACILE SYNTHESIS; FUEL-CELLS; ETHANOL ELECTROOXIDATION; OXIDATION; METHANOL; PD; PERFORMANCE; CATALYSTS;

D O I：

10.1080/14686996.2020.1789437

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two highly active and stable Pd-based intermetallic nanocrystals with early d-metals Pd3Ti and Pd3Zr have been developed. The nanocrystals are synthesized by co-reduction of the respective salts of Pd and Ti/Zr. Hard X-ray photoemission Spectroscopy (HAXPES) analysis of the nanocrystals indicates that the electronic properties of Pd are modified significantly, as evident from the lowering of the d-band center of Pd. The intermetallic nanocrystals dispersed in Vulcan carbon, Pd3Ti/C and Pd3Zr/C, exhibit improved electrocatalytic activity towards methanol and ethanol oxidation in an alkaline medium (0.5 M KOH), compared to those of commercially available catalysts such as Pd/C, Pt/C, and Pt3Sn/C. In addition, Pd3Ti/C and Pd3Zr/C show significantly higher activity towards the oxidation of formic acid in an acidic medium (0.5 M H2SO4), compared to those of Pd/C and Pt/C. The modification of the d-band center of Pd as a result of the alloying of Pd with the early d-metals Ti and Zr may be responsible for the enhanced catalytic activity.

引用

页码：573 / 583

页数：11

共 23 条

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