A general synthesis approach for supported bimetallic nanoparticles via surface inorganometallic chemistry

Kunlun Ding; David A Cullen; Laibao Zhang; Zhi Cao; Amitava D Roy; Ilia N Ivanov; Dongmei Cao

doi:10.1126/science.aau4414

A general synthesis approach for supported bimetallic nanoparticles via surface inorganometallic chemistry

Science. 2018 Nov 2;362(6414):560-564. doi: 10.1126/science.aau4414.

Authors

Kunlun Ding¹, David A Cullen², Laibao Zhang³, Zhi Cao^{4

5}, Amitava D Roy⁶, Ilia N Ivanov⁷, Dongmei Cao⁸

Affiliations

¹ Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA. kunlunding@lsu.edu.
² Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
³ Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA.
⁴ State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi 030001, People's Republic of China.
⁵ Synfuels China Co., Ltd., Beijing 100195, People's Republic of China.
⁶ Center for Advanced Microstructures and Devices, Louisiana State University, Baton Rouge, LA 70806, USA.
⁷ Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
⁸ Shared Instrumentation Facility, Louisiana State University, Baton Rouge, LA 70803, USA.

PMID: 30385572
DOI: 10.1126/science.aau4414

Abstract

The synthesis of ultrasmall supported bimetallic nanoparticles (between 1 and 3 nanometers in diameter) with well-defined stoichiometry and intimacy between constituent metals remains a substantial challenge. We synthesized 10 different supported bimetallic nanoparticles via surface inorganometallic chemistry by decomposing and reducing surface-adsorbed heterometallic double complex salts, which are readily obtained upon sequential adsorption of target cations and anions on a silica substrate. For example, adsorption of tetraamminepalladium(II) [Pd(NH₃)₄ ²⁺] followed by adsorption of tetrachloroplatinate [PtCl₄ ^2-] was used to form palladium-platinum (Pd-Pt) nanoparticles. These supported bimetallic nanoparticles show enhanced catalytic performance in acetylene selective hydrogenation, which clearly demonstrates a synergistic effect between constituent metals.

Publication types

Research Support, Non-U.S. Gov't