Gas Phase Photocatalytic CO2 Reduction, “A Brief Overview for Benchmarking”

Abstract

Photocatalytic CO2 reduction is emerging as an affordable route for abating its ever increasing concentration. For commercial scale applications, many constraints are still required to be addressed. A variety of research areas are explored, such as development of photocatalysts and photoreactors, reaction parameters and conditions, to resolve these bottlenecks. In general, the photocatalyst performance is mostly adjudged in terms of its ability to only produce hydrocarbon products, and other vital parameters such as light source, reaction parameters, and type of photoreactors used are not normally given appropriate attention. This makes a comprehensive comparison of photocatalytic performance quite unrealistic. Hence, probing the photocatalytic performance in terms of apparent quantum yield (AQY) with the consideration of certain process and experimental parameters is a more reasonable and prudent approach. The present brief review portrays the importance and impact of aforementioned parameters in the field of gas phase photocatalytic CO2 reduction.

Inside‐and‐Out Semiconductor Engineering for CO2 Photoreduction: From Recent Advances to New Trends

“…After the formation of photoexcited charge carriers, most of the photoexcited electrons and holes tend to be consumed via recombination before the completion of surface catalytic reactions ( Figure ). [ 116–121 ] Because the recombination processes significantly decrease the quantum efficiency of CO 2 photoreduction, the researchers have been trying their best to relieve the recombination rate and degree of electrons and holes. [ 42,122 ] It is worth noting that the time scales for different charge movement behaviors is also different.…”

Electrochemical CO2 Reduction to CO Catalyzed by 2D Nanostructures

“…One possible way to counter this is to capture and convert CO 2 to industrially important organic compounds [6][7][8][9][10]. To date, several strategies have been employed for the reduction of CO 2 ; for example, chemical [11], thermochemical [12,13], photocatalytic [14][15][16][17][18][19][20][21], electrocatalytic [22][23][24], biological [25], and inorganic transformation [26]. However, among those, a great deal of research has focused on electrochemical CO 2 reduction technology aimed towards large scale applications due to its environmental compatibility and cost-effectiveness [27][28][29].…”

Photocatalytic CO2 Reduction and Electrocatalytic H2 Evolution over Pt(0,II,IV)-Loaded Oxidized Ti Sheets

“…Hydrogen production via water splitting is another useful project for these types of solutions. For CO 2 reduction into fuels, increasing selectivity and production efficiency have been very important issues [ 1 , 2 , 3 , 4 , 5 ]. Many strategies have been employed such as defect controlling [ 6 ], crystal facet tailoring [ 7 , 8 ], metal alloys/cocatalysts [ 9 , 10 ], support [ 11 ], and hybridization [ 12 ].…”