Ionic-caged heterometallic bismuth-platinum complex exhibiting electrocatalytic CO2 reduction

Takefumi Yoshida*, Habib Md Ahsan, Hai Tao Zhang, David Chukwuma Izuogu, Hitoshi Abe, Hiroyoshi Ohtsu, Tadashi Yamaguchi, Brian K. Breedlove, Alex J.W. Thom, Masahiro Yamashita

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)2652-2660
Number of pages9
JournalDalton Transactions
Issue number8
Publication statusPublished - 2020 Feb 28

ASJC Scopus subject areas

  • Inorganic Chemistry


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