A metal-free cascaded process for efficient HO photoproduction using conjugated carbonyl sites.

Carbon-based metal-free catalysts are promising green catalysts for photocatalysis and electrocatalysis due to their low cost and environmental friendliness. A key challenge in utilizing these catalysts is identifying their active sites, given their poor crystallinity and complex structures. Here we demonstrate the key structure of the double-bonded conjugated carbon group as a metal-free active site, enabling efficient O photoreduction to HO through a cascaded water oxidation - O reduction process.

Construction of coherent interface between CuO and CeOvia electrochemical reconstruction for efficient carbon dioxide reduction to methane.

Developing an efficient electrocatalyst that enables the efficient electrochemical conversion from CO to CH across a wide potential range remains a formidable challenge. Herein, we introduce a precatalyst strategy that realizes the in situ electrochemical reconstruction of ultrafine CuO nanodomains, intricately coupled on the CeO surface (CuO/CeO), originating from the heterointerface comprised of ultrafine CuO nanodomains on the CeO surface (CuO/CeO). When served as the electrocatalyst for the electrochemical CO reduction reaction, CuO/CeO delivers a selectivity higher than 49 % towards CH over a broad potential range from -1.

Continuous Homogeneous Catalytic Oxidation of C-H Bonds by Metal-Free Carbon Dots with a Poly(ascorbic acid) Structure.

The activation of the C-H bond, a necessary step to get high-value-added compounds, is one of the most important issues in modern catalysis. Combining the advantages of both homogeneous and heterogeneous catalysis, a certain continuous homogeneous process should be one of the ideal routes for the catalytic activation of C-H bonds. Here, through machine learning (ML), we predicted and fabricated metal-free carbon dot (C-Dot) homogeneous catalysts for C-H bond oxidation.

Which kind of nitrogen chemical states doped carbon dots loaded by g-CN is the best for photocatalytic hydrogen production.

Recently, g-CN (CN) loaded N-doped carbon dots (NCDs) have been widely studied as promising metal-free photocatalysts due to their impressive performance in hydrogen production. However, deep understanding of the effect of nitrogen chemical states on photocatalytic activity is still lacked. In this work, NCDs doped with pyrrole nitrogen, graphite/pyrrole nitrogen, and pyrrole/pyridine nitrogen were prepared and hybridized with g-CN.