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Ionic-caged heterometallic bismuth–platinum complex exhibiting electrocatalytic CO2 reduction
- Source :
- Dalton Transactions. 49(No. 8):2652-2660
- Publication Year :
- 2020
-
Abstract
- An air-stable heterometallic Bi-Pt complex with the formula [BiPt(SAc)5]n (1; SAc = thioacetate) was synthesized. The crystal structure, natural bond orbital (NBO) and local orbital locator (LOL) analyses, localized orbital bonding analysis (LOBA), and X-ray absorption fine structure (XAFS) measurements were used to confirm the existence of Bi-Pt bonding and an ionic cage of O atoms surrounding the Bi ion. From the cyclic voltammetry (CV) and controlled potential electrolysis (CPE) experiments, 1 in tetrahydrofuran reduced CO2 to CO, with a faradaic efficiency (FE) of 92% and a turnover frequency (TOF) of 8 s-1 after 30 min of CPE at -0.79 V vs. NHE. The proposed mechanism includes an energetically favored pathway via the ionic cage, which is supported by the results of DFT calculations and reflectance infrared spectroelectrochemistry data.
Details
- Language :
- English
- Volume :
- 49
- Issue :
- No. 8
- Database :
- OpenAIRE
- Journal :
- Dalton Transactions
- Accession number :
- edsair.doi.dedup.....c31d1e20113da0cf548d53b2a484ec84