Oxygen reduction reaction (ORR) and oxygen evolution (OER) are important for developing energy systems such as fuel cells metal–air batteries. Precious metal catalysts, Pt IrO2, have been considered electrochemical catalysts because of their excellent activity the ORR OER. However, disadvantages, low durability long-term operation high price, necessitate development alternative catalysts. Trans...

As a carbon-free energy carrier, hydrogen has become the pivot for future clean energy, while efficient production and combustion still require precious metal-based catalysts. Single-atom catalysts (SACs) with high atomic utilization open up desirable perspective scale applications of metals, but general facile preparation various SACs remains challenging. Herein, movable printing method been d...

Carbonaceous materials containing non-precious metal and/or doped nitrogen have attracted tremendous attention in the field of electrochemical energy storage and conversion. Herein, we report the synthesis and electrochemical properties of a new family of nitrogen-doped metal/carbon (M/N/C, M = Fe, Co, Ni) nanocomposites. The M/N/C nanocomposites, in which metal nanoparticles are embedded in th...

PURPOSE The aim of this systematic review was to determine which dowel (post) and core system is the most successful when used in vivo to restore endodontically treated teeth. MATERIALS AND METHODS A MEDLINE, a Cochrane, and an EMBASE search (three specified searches) were conducted to identify randomized (RCT) and nonrandomized controlled clinical trials (CCT), cohort (CS), and case control ...

Manganese complexes have been considered as a cheap and readily available alternative to commonly used precious metal catalysts in C–C bond coupling reactions. Although high-valent Mn aryl intermed...

A thermally-integrated solar water-splitting approach is presented, using bifunctional precious metal free catalysts based on Fe and Ni. The scalable reaches up to 13.4% solar-to-hydrogen (STH) efficiency.

Dehydroformylation, or the reaction of aldehydes to produce alkenes, hydrogen gas, and carbon monoxide, is a powerful transformation that is underdeveloped despite the high industrial importance of the reverse reaction, hydroformylation. Interestingly, nature routinely performs a related transformation, oxidative dehydroformylation, in the biosynthesis of cholesterol and related sterols under m...