The classic approach to preparation of XRF specimens of inhomogeneous materials is the method of flux/fusion. This technique has not been applied to automotive catalysts because they utilize large quantities of precious metals (Pt, Pd, Rh) that are reduced at typical fusion temperatures and agglomerate and alloy with the crucible walls, leading to erratic losses of the precious metals. This eff...

Water splitting, an efficient approach for hydrogen production, is often hindered by unfavorable kinetics of oxygen evolution reaction (OER). In order to reduce the overpotential, noble metal oxides-based electrocatalysts like RuO2 and IrO2 are usually utilized. However, due to their scarcity, the development of cost-effective non-precious OER electrocatalysts with high efficiency and good stab...

The recovery of precious metals from waste printed circuit boards (PCBs) is an effective recycling process. This paper presents a promising hydrometallurgical process to recover precious metals from waste PCBs. To simplify the metal leaching process, large pieces of PCBs were used instead of a pulverized sample. The chemical coating present on the PCBs was removed by sodium hydroxide (NaOH) tre...

High temperature geothermal systems are the modern analogue of epithermal precious metal ore deposits. In these systems, gold and silver are transported primarily as bisulfide complexes, with the precious metals being deposited in response to boiling and mixing of the deep geothermal fluid. In order for the geothermal system to produce an economic precious metal deposit within the typical lifet...

Electrocatalysis plays a vital role in many chemical processes and is concentrated on improving their efficiency [...]