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Kinetic studies of gold(III) chloride complex reduction and solid phase precipitation in acidic aqueous system using dimethylamine borane as reducing agent

机译:以二甲胺硼烷为还原剂的酸性水体系中氯化金(III)配合物还原和固相沉淀的动力学研究

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摘要

Kinetics of gold(III) chloride complex ions reduction with dimethylamine borane and precipitation of gold nanoparticles was investigated. The influence of concentrations of reductant, gold(III) chloride complex ions, neutral salt and chloride ions as well as temperature on the process was reported. Experimental results were used to determine parameters in the Arrhenius equation. A set of reactions occurring in the system was proposed. Rate equations were presented and verified. It was proposed that state of the catalytic surface of gold particles play a crucial role in the mechanism of the reaction and competition between AuCl_4~- adsorption and AuCl_4~- reduction on the metal particles exists in the system. Microscopic observations as well as analysis of the particles were also performed.
机译:研究了二甲胺硼烷还原氯化金(III)络合物离子的动力学以及金纳米颗粒的沉淀。报道了还原剂,氯化金(III)络合物离子,中性盐和氯离子的浓度以及温度对工艺的影响。实验结果用于确定Arrhenius方程中的参数。提出了在系统中发生的一组反应。提出并验证了速率方程。有人认为,金颗粒催化表面的状态在反应机理中起着至关重要的作用,并且系统中存在金颗粒吸附AuCl_4〜-和AuCl_4〜-还原之间的竞争。还进行了显微镜观察以及颗粒分析。

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