Electrochemical promotion of Ru nanoparticles deposited on a proton conductor electrolyte during CO2 hydrogenation

Electrochemical promotion of copper nanoparticles for the reverse water gas shift reaction

“…Under the same conditions, the open-circuit CO rate showed to be two times higher than those of recently reported FeO x and CoO x NPs on YSZ 25,26 but was still lower than that of ruthenium, a noble metal catalyst. 21…”

“…Moreover, metals including Ru, Pd, Ni, Co, and Fe dispersed on various solid electrolytes like Y 2 O 3 -doped barium zirconate (BZY, H + conductor), Y 2 O 3 -stabilized ZrO 2 (YSZ, O 2− conductor), and β′′-Al 2 O 3 (Na + or K + conductor) have been used as catalysts in CO 2 hydrogenation. 21–26 In EPOC, promoting ion species are supplied to or removed from catalyst electrochemically by polarizing between counter electrode and catalyst which also functions as the working electrode. 11 Positive polarization refers to applying a positive potential difference between the working and the reference electrodes ( U WR > 0) or passing current from the working electrode to the counter electrode, and negative polarization is referred to the opposite situation.…”

“…Bebelis et al 22 reported that Pd favoured the selectivity to RWGS reaction and the CO rate was enhanced by 6 times and 6.7 times when Pd was deposited on YSZ and β′′-Al 2 O 3 , respectively. Zagoraios et al 21 investigated the EPOC effect of Ru on BZY and showed that methanation was favoured over RWGS reaction with an increase of 80% in CH 4 production rate and a decrease in CO rate under positive polarization and reversed under negative polarization. Theleritis et al 31 studied the Ru deposited on YSZ and observed a similar phenomenon with an increase in methanation by 2.5 times and the highest faradaic efficiency for EPOC of CO 2 hydrogenation of 530.…”

Electrical Reverse Shift: Sustainable CO2 Valorization for Industrial Scale

“…[8][9][10] An intermediate pathway is electrochemically promoted catalysis, enhancing catalytic conversion at low temperatures with minimal methane slip. [11][12][13] This work demonstrates the feasibility of electrically driven reverse water-gas-shift to utilize CO 2 . Integrated ohmic heating provides inherent high heating efficiency with negligible transformation losses compared to other electrically heated technologies, high carbon and hydrogen efficiency, and provides no associated CO 2 emissions when utilizing renewable electricity.…”

Electrical Reverse Shift: Sustainable CO2 Valorization for Industrial Scale

“…Co‐electrolysis of H 2 O and CO 2 in SOEC can operate with high efficiency, though CO concentration is limited by the risk of localized carbon formation from the Boudouard reaction [8–10] . An intermediate pathway is electrochemically promoted catalysis, enhancing catalytic conversion at low temperatures with minimal methane slip [11–13] …”