Waste Plastic-Supported Pd Single-Atom Catalyst for Hydrogenation.

As worldwide plastic pollution continues to rise, innovative ideas for effective reuse and recycling of waste plastic are needed. Single-atom catalysts (SACs), which are known for their high activity and selectivity, present unique advantages in facilitating plastic degradation and conversion. Waste plastic can be used as a support or raw material to create SACs, which reduces waste generation while simultaneously utilizing waste as a resource.

Facet-dependent synthesis of HO from H and O over single Pt atom-modified Pd nanocrystal catalysts.

Hydrogen peroxide (HO) is one of the most valuable clean energy sources with a rapidly growing requirement in industry and daily life. The direct synthesis of HO from hydrogen and oxygen is considered to be an economical and environmentally friendly manufacturing route to replace the traditional anthraquinone method, although it remains a formidable challenge owing to low HO selectivity and production. Here, we report a catalyst consisting of Pd(111) nanocrystals on TiO modified with single Pt atoms (PtPd(111)/TiO), which displays outstanding reactivity, producing 1921.

Bimetallic CoCu-modified Pt species in S-1 zeolite with enhanced stability for propane dehydrogenation.

Propane dehydrogenation (PDH) has been an outstanding technique with a bright prospect, which can meet the growing global demand for propylene. However, undesired side reactions result in the deactivation of the Pt-based catalysts, which contribute to the insufficient lifetime of the catalysts. Herein, we describe a novel catalyst by encapsulating bimetallic CoCu-modified Pt species in S-1 zeolite for efficient dehydrogenation of propane, which synergizes the confinement of zeolites and the geometric and electronic effects on Pt species for enhancing the catalyst stability.

Boosting the Catalase-Like Activity of SAzymes via Facile Tuning of the Distances between Neighboring Atoms in Single-Iron Sites.

A nanozyme with neighboring single-iron sites (Fe -SAzyme) was introduced as a bioinspired catalase mimic, featuring excellent activity under varied conditions, twice as high as that of random Fe -SAzyme and ultrahigh H O affinity as that of bioenzymes. Surprisingly, the interatomic spacing tuning between adjacent iron sites also suppressed the competitive peroxidase pathway, remarkably increasing the catalase/peroxidase selectivity up to ~6 times compared to Fe -SAzyme. This dramatically switched the catalytic activity of Fe-SAzymes from generating (i.

Protein powder derived nitrogen-doped carbon supported atomically dispersed iron sites for selective oxidation of ethylbenzene.

Atomically dispersed Fe species embedded in the nitrogen-containing carbon supports (Fe/NC) are successfully synthesized using a ball milling approach, with commercial protein powder as the nitrogen source. The catalyst exhibits outstanding performance in the oxidation of aromatic compounds containing saturated C-H bonds into corresponding ketones under ambient conditions, which is superior to those of a nanoparticle catalyst (Fe/NC) and a metal-free catalyst (NC).

Acute and Sub-chronic Toxicity of Indole Alkaloids Extract from Leaves of Alstonia scholaris (L.) R. Br. in Beagle Dogs.

Alstonia scholaris (L.) R. Br.

Genotoxicity and Safety Pharmacology Studies of Indole Alkaloids Extract from Leaves of Alstonia scholaris (L.) R. Br.

Indole alkaloids extract (IAAS) was prepared from leaves of Alstonia scholaris (L.) R. Br.

Acute and Chronic Toxicity of Indole Alkaloids from Leaves of Alstonia scholaris (L.) R. Br. in Mice and Rats.

Alstonia scholaris (L.) R. Br.

Preparation of cytochrome P450 enzyme-cobalt phosphate hybrid nano-flowers for oxidative coupling of benzylamine.

A novel hybrid material with flower-mimicking morphology was fabricated with a facile coprecipitation method, and cytochrome P450 enzyme and cobalt phosphate were employed as organic and inorganic components, respectively. The hybrid nano-flowers showed excellent catalytic performance in the oxidative coupling of benzylamine, including the high conversion (99.9%) and selectivity (97.