CO 2 treatment of carbon fibers improves adsorption of fuel cell platinum
- PDF / 1,510,992 Bytes
- 6 Pages / 595.276 x 790.866 pts Page_size
- 18 Downloads / 136 Views
ORIGINAL PAPER
CO2 treatment of carbon fibers improves adsorption of fuel cell platinum Joon Hyuk Lee1 · Soon Hong Lee2 · Dong Hack Suh1 Received: 25 June 2020 / Accepted: 23 September 2020 © Springer Nature Switzerland AG 2020
Abstract Platinum (Pt)-based catalysts have sparked intensive interest in fuel cell research. Activated carbon fibers are widely used for electrodes due to their high conductivity, yet their surface treatment commonly involves toxic reagents. Here we treated activated carbon fibers with C O2 and H 2O at 100 °C for 1 h under 20 bar. Results show that treated activated carbon fibers display a higher Pt(IV) adsorption capacity. Benefits may include lower amounts of costly Pt in fuels cells, and sequestrating CO2 in solid materials to decrease global warming. Keywords Carbon dioxide utilization · Activated carbon fiber · Adsorption kinetics · Standard energy · Platinum · Green chemistry
Introduction Carbon occurs in numerous structural forms, and the discovery of such allotropes has been demonstrated to play significant roles in waste-water treatment, air purification, and remediation (Singh and Verma 2015). With the purpose of high energy density for rechargeable batteries, carbonaceous materials have also turned out to be one of the promising electrode materials for supercapacitors (Cheng et al. 2019). Since the electrochemical double-layer mechanism is based on the energy storage, the specific surface area and the micropore area have become essential for the overall battery Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10311-020-01105-7) contains supplementary material, which is available to authorized users. * Dong Hack Suh [email protected] Joon Hyuk Lee [email protected] Soon Hong Lee [email protected] 1
Department of Chemical Engineering, Hanyang University, 222, Wangsimni‑ro, Seongdong‑gu, Seoul 133‑791, South Korea
Department of Environmental Engineering, Anyang University, Anyang 5‑dong, Manan‑Gu, Anyang, Gyunggi‑do 708‑113, South Korea
2
performance. Especially, carbonaceous materials with platinum (Pt) catalyst loading cathodes for fuel cells have a vast potential regardless of a high cost. As a counterpart of two expensive but effective materials, previous studies have focused on decreasing the load of Pt catalysts or optimizing the surface morphology of carbonaceous materials (Qi and Kaufman 2003; Singh et al. 2016). Here, activated carbon fibers are considered to be a decent candidate for electrode materials with their fibrous characteristics. Activated carbon fibers have a high specific surface area with straight micropores, which enables sufficient adsorption capacity (Gopinath et al. 2020). While the ground-state technique using activated carbon fibers has been carried out, there are very few reports that exist on the fundamental physicochemical kinetics between Pt ions and activated carbon fibers due to its less-toxicity. In this study, we present a novel and simple possibility that may decrease
Data Loading...
