Changes in the oxidation state of Pt single-atom catalysts upon removal of chloride ligands and their effect for electrochemical reactions

被引：51

作者：

Shin, Sangyong ^{[1
]}

Kim, Jiwhan ^{[1
]}

Park, Subin ^{[2
]}

Kim, Hee-Eun ^{[1
]}

Sung, Yung-Eun ^{[2
]}

Lee, Hyunjoo ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Daejeon 34141, South Korea

[2] Seoul Natl Univ, Sch Chem & Biol Engn, IBS, Ctr Nanoparticle Res, Seoul 08826, South Korea

来源：

CHEMICAL COMMUNICATIONS | 2019年 / 55卷 / 45期

基金：

新加坡国家研究基金会;

关键词：

METAL-SUPPORT INTERACTIONS; HYDROGEN-PEROXIDE; CO OXIDATION; OXYGEN; REDUCTION; PLATINUM; H2O2; ENCAPSULATION; TRENDS; PD;

D O I：

10.1039/c9cc01593k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Single atomic Pt supported on TiC was prepared from chloride Pt precursors, then the chloride ligands were intentionally removed by increasing the reduction temperature. The 0.2 wt% Pt/ TiC catalyst reduced at 300 8C had more reduced Pt single-atoms with fewer chloride ligands and exhibited the highest currents for H2O2 formation in the electrochemical oxygen reduction reaction. Controlling the oxidation state of the single-atoms is very important to maximize the activity of the single-atom catalysts.

引用

页码：6389 / 6392

页数：4

共 39 条

[21] Ag Alloyed Pd Single-Atom Catalysts for Efficient Selective Hydrogenation of Acetylene to Ethylene in Excess Ethylene [J].

Pei, Guang Xian ;

Liu, Xiao Yan ;

Wang, Aiqin ;

Lee, Adam F. ;

Isaacs, Mark A. ;

Li, Lin ;

Pan, Xiaoli ;

Yang, Xiaofeng ;

Wang, Xiaodong ;

Tai, Zhijun ;

Wilson, Karen ;

Zhang, Tao .

ACS CATALYSIS, 2015, 5 (06) :3717-3725

[22] THERMAL-STABILITY OF PT FILMS ON TIO2(110) - EVIDENCE FOR ENCAPSULATION [J].

PESTY, F ;

STEINRUCK, HP ;

MADEY, TE .

SURFACE SCIENCE, 1995, 339 (1-2) :83-95

[23]

Qiao BT, 2011, NAT CHEM, V3, P634, DOI [10.1038/NCHEM.1095, 10.1038/nchem.1095]

[24] Encapsulation of Pt nanoparticles as a result of strong metal-support interaction with Fe3O4 (111) [J].

Qin, Z. -H. ;

Lewandowski, M. ;

Sun, Y. -N. ;

Shaikhutdinov, S. ;

Freund, H. -J. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (27) :10209-10213

[25]

Siahrostami S, 2013, NAT MATER, V12, P1137, DOI [10.1038/NMAT3795, 10.1038/nmat3795]

[26] Trends in electrocatalysis on extended and nanoscale Pt-bimetallic alloy surfaces [J].

Stamenkovic, Vojislav R. ;

Mun, Bongjin Simon ;

Arenz, Matthias ;

Mayrhofer, Karl J. J. ;

Lucas, Christopher A. ;

Wang, Guofeng ;

Ross, Philip N. ;

Markovic, Nenad M. .

NATURE MATERIALS, 2007, 6 (03) :241-247

[27] Improved oxygen reduction activity on Pt3Ni(111) via increased surface site availability [J].

Stamenkovic, Vojislav R. ;

Fowler, Ben ;

Mun, Bongjin Simon ;

Wang, Guofeng ;

Ross, Philip N. ;

Lucas, Christopher A. ;

Markovic, Nenad M. .

SCIENCE, 2007, 315 (5811) :493-497

[28] Classical strong metal-support interactions between gold nanoparticles and titanium dioxide [J].

Tang, Hailian ;

Su, Yang ;

Zhang, Bingsen ;

Lee, Adam F. ;

Isaacs, Mark A. ;

Wilson, Karen ;

Li, Lin ;

Ren, Yuegong ;

Huang, Jiahui ;

Haruta, Masatake ;

Qiao, Botao ;

Liu, Xin ;

Jin, Changzi ;

Su, Dangsheng ;

Wang, Junhu ;

Zhang, Tao .

SCIENCE ADVANCES, 2017, 3 (10)

[29] Nanostructured platinum becomes alloyed at oxide-composite substrate [J].

Timperman, L. ;

Lewera, A. ;

Vogel, W. ;

Alonso-Vante, N. .

ELECTROCHEMISTRY COMMUNICATIONS, 2010, 12 (12) :1772-1775

[30] Electrochemical reduction of oxygen on gold surfaces: A density functional theory study of intermediates and reaction paths [J].

Vassilev, Peter ;

Koper, Marc T. M. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (06) :2607-2613

← 1 2 3 4 →