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Vol. 26 No. 15 (2014): Vol 26 Issue 15

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Synthesis and Thermo-chemical Profile of [Pt(NH3)4]C2O4 and [Pt(NH3)4](OOCCH2COO) as New Precursors for Supported Platinum Catalysts

https://doi.org/10.14233/ajchem.2014.16197
Juan Yu
State Key Lab of Advanced Technologies for PGM, Kunming Institute of Precious Metals, Kunming 650106, P.R. China
Jing Lei
School of Chemistry, Hunan Normal University, Changsha 410081, P.R. China
Caixian Yan
State Key Lab of Advanced Technologies for PGM, Kunming Institute of Precious Metals, Kunming 650106, P.R. China
Jing Jiang
State Key Lab of Advanced Technologies for PGM, Kunming Institute of Precious Metals, Kunming 650106, P.R. China
Qingsong Ye
State Key Lab of Advanced Technologies for PGM, Kunming Institute of Precious Metals, Kunming 650106, P.R. China
Qiaowen Chang
State Key Lab of Advanced Technologies for PGM, Kunming Institute of Precious Metals, Kunming 650106, P.R. China
Weiping Liu
State Key Lab of Advanced Technologies for PGM, Kunming Institute of Precious Metals, Kunming 650106, P.R. China
Jialin Chen
State Key Lab of Advanced Technologies for PGM, Kunming Institute of Precious Metals, Kunming 650106, P.R. China

Corresponding Author(s) : Jialin Chen

liuweiping0917@126.com; cjl@ipm.com.cn

Asian Journal of Chemistry, Vol. 26 No. 15 (2014): Vol 26 Issue 15

Abstract

Two water-soluble complexes featuring [Pt(NH3)4]2+ as a cation and common dicarboxylate (oxalate or malonate) as counter anion have been synthesized, characterized and evaluated for their thermo-chemical profile. The complexes can be easily synthesized in a yield of about 85 % from K2PtCl4 via a series of ligand substitution reactions at mild temperatures and under normal pressures. The thermolysis temperatures and products both in inert and oxidative atmosphere were determined by TG-DTA along with GC-MS. The thermolysis of [Pt(NH3)4](C2O4) begins at about 220 ºC and ends at 270 ºC, forming metallic platinum, CO2 and NH3, whereas [Pt(NH3)4](OOCCH2COO) undergoes a two-phase thermolysis. The first phase corresponds to the loss of one amminia from 105 ºC, followed by the second phase, leading to complete destruction of the complex at 270 ºC. The final products are metallic platinum, CO2, NH3 and CH3CONH2. The thermolysis is caused by the intramolecular redox reaction. These unique properties render the two complexes potential as the new alternative precursors for supported platinum catalysts.

Keywords

Tetraammineplatinumoxalate Tetraammineplatinummolonate Thermochemical profile Platinum catalyst
Yu, J., Lei, J., Yan, C., Jiang, J., Ye, Q., Chang, Q., … Chen, J. (2014). Synthesis and Thermo-chemical Profile of [Pt(NH3)4]C2O4 and [Pt(NH3)4](OOCCH2COO) as New Precursors for Supported Platinum Catalysts. Asian Journal of Chemistry, 26(15), 4755–4758. https://doi.org/10.14233/ajchem.2014.16197
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