Advances in molecular photocatalytic and electrocatalytic CO reduction

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This review describes recent developments in photocatalytic and electrocatalytic CO reduction. On the electrocatalytic side, there have been advances in optimization of known rhenium motifs sometimes in conjunction with silicon photoelectrodes giving enhanced catalytic current and stability. Complexes of copper capable of absorbing atmospheric CO have been incorporated into an electrocatalytic cycle and metal-free electrocatalysis of CO to methanol has been achieved with pyridinium ions. A complete cell with two photo-electrodes, one for water oxidation and the other for CO reduction to formate has been set up successfully. The cathode employs ruthenium catalysts on InP. Progress in photocatalytic CO reduction has been made with osmium complexes exhibiting good selectivity and stability. The separation between Ru and Re centers in light-harvesting donor-acceptor dyads has been investigated providing some inspiration for design. A ruthenium catalyst has been sensitized by tantalum oxide particles. Metalloporphyrin-rhenium dyads have also been studied for photocatalytic CO reduction. In the biological arena, a ruthenium complex has been used to sensitize carbon monoxide dehydrogenase on titanium dioxide particles.
Original languageEnglish
Pages (from-to)2562-2570
Issue number21-22
Publication statusPublished - 1 Nov 2012

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