Robust FeOOH/BiVO4/Cu(In, Ga)Se2 tandem structure for solar-powered biocatalytic CO2 reduction. Issue 17 (20th April 2020)

• Record Type: Journal Article
• Authors: Kim, Jinhyun; Lee, Yang Woo; Choi, Eun-Gyu; Boonmongkolras, Passarut; Jeon, Byoung Wook; Lee, Hojin; Kim, Seung Tae; Kuk, Su Keun; Kim, Yong Hwan; Shin, Byungha; Park, Chan Beum
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 17(2020)
• Page Start: 8496
• Page End: 8502
• Publication Date: 2020-04-20
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0ta02069a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A robust, scalable FeOOH/BiVO4 /Cu(In, Ga)Se2 tandem structure achieves unbiased, long-term photobiocatalytic conversion of CO2 to formate. Abstract : A robust photovoltaic (PV) is essential for long-term redox biotransformations in biocatalytic photoelectrochemical (PEC) platforms. Here, we report a single Cu(In, Ga)Se2 (CIGS) solar cell for unbiased photobiocatalytic reduction reactions. The photoanode/CIGS/cathode tandem assembly drives cofactor-dependent biocatalytic CO2 reduction under visible light. Our scalable PEC-PV tandem device achieves the longest reaction time of 72 h and the highest ever recorded turnover frequency and total turnover number of the cofactor of 0.236 h −1 and 11.2, respectively, for biocatalytic PEC production of formate through cofactor regeneration. This benchmark performance is attributed to the excellent PEC stability of the CIGS component; the substitution of CIGS with a perovskite solar cell (PSC) results in unstable generation of photocurrent and a lower concentration of formate under high-humidity environments because of the water-induced degradation of PSC. This work demonstrates the propriety of CIGS in robust PEC-PV tandems for artificial photosynthesis.