TY - JOUR
T1 - Advances and recent trends in cobalt-based cocatalysts for solar-to-fuel conversion
AU - Soni, Vatika
AU - Xia, Changlei
AU - Cheng, Chin Kui
AU - Nguyen, Van Huy
AU - Nguyen, Dang Le Tri
AU - Bajpai, Archana
AU - Kim, Soo Young
AU - Le, Quyet Van
AU - Khan, Aftab Aslam Parwaz
AU - Singh, Pardeep
AU - Raizada, Pankaj
N1 - Funding Information:
This research was supported by Brain Pool Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (grant number 2020H1D3A1A04081409). The corresponding author, Dr. Pankaj Raizada is thankful to H.P. Council for Science, Technology & Environment (HIMCOSTE) for financial support through HIMCOSTE research project no. (R&D)/2019-20-2.5(4
Publisher Copyright:
© 2021
PY - 2021/9
Y1 - 2021/9
N2 - Photocatalysis is considered to be one of the preeminent routes to realize sustainable O2 and H2 evolution, as well as CO2 reduction. Owing to various limitations, i.e. insufficient surface area, active sites, charge isolation, high overpotential, etc. associated with a single photoactive semiconductor, it is challenging to convert adsorbed H2O and CO2 to CO, H2, CH4, CH3OH, O2, etc. by harvesting solar light. Among popular cocatalysts, earth-abundant cocatalysts exhibited great potential in the area of photocatalysis and are highly significant in accelerating reaction kinetics happening on the surface of semiconductors. Recently, other than the costly noble metals cocatalysts, earth-abundant cobalt based materials can be used as efficient cocatalysts, which effectively amended the photoactivity of photoactive semiconductors by forming stable junctions. Herein, in this all-inclusive review, the recent progress in cobalt based materials as cocatalysts applied in photocatalytic CO2 conversion and water splitting are concisely summarized. Special emphasis is placed on the surface modification principle, design strategies, and loading techniques for further amending the redox potentials of cobalt based cocatalysts for energy applications. Particularly, five types of amendment stratagems based on enhanced solar energy harvesting accelerated charge tunneling, exposed active centers, strengthened photostability, and lowered overpotential have been extensively highlighted and summarized. Typically, the anchoring of both reductive and oxidative (dual) cocatalysts have been explored, which depicted the synergistic behaviour of dual cocatalysts in amending surface properties for improving the photocatalytic CO2 reduction, H2 and O2 generation. Finally, this review addresses the emerging current perspectives as an insight into future research directions in this field to develop more efficient cocatalysts which effectively helped in the mitigation of energy and environmental issues.
AB - Photocatalysis is considered to be one of the preeminent routes to realize sustainable O2 and H2 evolution, as well as CO2 reduction. Owing to various limitations, i.e. insufficient surface area, active sites, charge isolation, high overpotential, etc. associated with a single photoactive semiconductor, it is challenging to convert adsorbed H2O and CO2 to CO, H2, CH4, CH3OH, O2, etc. by harvesting solar light. Among popular cocatalysts, earth-abundant cocatalysts exhibited great potential in the area of photocatalysis and are highly significant in accelerating reaction kinetics happening on the surface of semiconductors. Recently, other than the costly noble metals cocatalysts, earth-abundant cobalt based materials can be used as efficient cocatalysts, which effectively amended the photoactivity of photoactive semiconductors by forming stable junctions. Herein, in this all-inclusive review, the recent progress in cobalt based materials as cocatalysts applied in photocatalytic CO2 conversion and water splitting are concisely summarized. Special emphasis is placed on the surface modification principle, design strategies, and loading techniques for further amending the redox potentials of cobalt based cocatalysts for energy applications. Particularly, five types of amendment stratagems based on enhanced solar energy harvesting accelerated charge tunneling, exposed active centers, strengthened photostability, and lowered overpotential have been extensively highlighted and summarized. Typically, the anchoring of both reductive and oxidative (dual) cocatalysts have been explored, which depicted the synergistic behaviour of dual cocatalysts in amending surface properties for improving the photocatalytic CO2 reduction, H2 and O2 generation. Finally, this review addresses the emerging current perspectives as an insight into future research directions in this field to develop more efficient cocatalysts which effectively helped in the mitigation of energy and environmental issues.
KW - Cobalt based co-catalysts
KW - Enhanced photocatalysis
KW - Semiconductor photocatalysis
KW - Solar fuel production
KW - Surface kinetics
UR - http://www.scopus.com/inward/record.url?scp=85107684706&partnerID=8YFLogxK
U2 - 10.1016/j.apmt.2021.101074
DO - 10.1016/j.apmt.2021.101074
M3 - Review article
AN - SCOPUS:85107684706
SN - 2352-9407
VL - 24
JO - Applied Materials Today
JF - Applied Materials Today
M1 - 101074
ER -