Electrochemical reduction of carbon dioxide (CO2) into chemicals and fuels has recently attracted much interest, but normally suffers from a high overpotential and low selectivity. In this work, single P atoms were introduced into a N‐doped carbon supported single Fe atom catalyst (Fe‐SAC/NPC) mainly in the form of P−C bonds for CO2 electroreduction to CO in an aqueous solution. This catalyst exhibited a CO Faradaic efficiency of ≈97 % at a low overpotential of 320 mV, and a Tafel slope of only 59 mV dec−1, comparable to state‐of‐the‐art gold catalysts. Experimental analysis combined with DFT calculations suggested that single P atom in high coordination shells (n≥3), in particular the third coordination shell of Fe center enhanced the electronic localization of Fe, which improved the stabilization of the key *COOH intermediate on Fe, leading to superior CO2 electrochemical reduction performance at low overpotentials.

Photoreduction of CO 2 into solar fuels has received great interest, but suffers from low catalytic efficiency and poor selectivity. Herein, two single-Cuatom catalysts with unique Cu configurations in phosphorus-doped carbon nitride (PCN), namely, Cu 1 N 3 @PCN and Cu 1 P 3 @PCN were fabricated via selective phosphidation, and tested in visible light-driven CO 2 reduction by H 2 O without sacrificial agents. Cu 1 N 3 @PCN was exclusively active for CO production with a rate of 49.8 μmol CO g cat À 1 h À 1 , outperforming most polymeric carbon nitride (C 3 N 4 ) based catalysts, while Cu 1 P 3 @PCN preferably yielded H 2 . Experimental and theoretical analysis suggested that doping P in C 3 N 4 by replacing a corner C atom upshifted the d-band center

The desire to utilise biobased feedstocks and develop more sustainable chemistry poses new challenges in catalysis. A synthetically useful catalytic conversion is ethenolysis, a cross metathesis reaction with ethylene. In this Review, the state of the art of ethenolysis in biobased chemistry was extensively examined using methyl oleate as a model compound for fatty acids. Allied to this, the ethenolysis of fatty acid, polymers and more challenging substrates are reviewed. To determine the limiting factors for the application of ethenolysis on biomass, the influence of reaction parameters were investigated and the bottlenecks for reaching high turnover numbers identified.

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