Catalyst: How Material Chemistry Enables Solar-Driven CO2 Conversion

Abstract

Tingting Kong obtained her PhD degree from Xi'an University of Science and Technology in 2017 and is currently a lecturer at Xi'an Shiyou University. Her research interest focuses on material design for photocatalytic CO 2 conversion. Jingxiang Low obtained his PhD degree from Wuhan University of Technology in 2018 and is currently a postdoctoral fellow at the University of Science and Technology of China (USTC). His research interest focuses on photocatalyst design for CO 2 reduction, nitrogen fixation, and methane conversion. Yujie Xiong is the Cheung Kong Chair Professor, deputy dean of the School of Chemistry and Materials Science at USTC, and director of the Division of Nanocatalysis and Energy Conversion at Hefei National Laboratory for Physical Sciences at the Microscale. His research interests include inorganic materials and devices for CO 2 reduction, nitrogen fixation, methane conversion, water splitting, and chemical production.

Coupling Strategy for CO2Valorization Integrated with Organic Synthesis by Heterogeneous Photocatalysis

“…Theo ptimal Co-doped sample,C o 1% @PNC,a chieved the highest yield of 1835 mmol g À1 for the reductive conversion of CO 2 to CO after 15 hofirradiation, as aresult of the cooperative effect between the increased number of active reaction sites and the improved charge carrier separation efficiency( Figure 11 D). Ther esults from ion chromatography, 13 CO 2 isotope labeling experiments,a nd mass spectrometry collectively confirmed that the products of HCOOH and CO are derived from CH 3 OH and CO 2 , respectively.M oreover,t he values of consumed e À /h 1+ during the reaction are close to 1, suggesting ag ood balance between CO 2 reduction and CH 3 OH oxidation.…”

“…After the electrons and holes are transferred to the semiconductor surface, electrons will react with acceptors, giving reduction products, while holes can react with donor species to generate oxidation products. However, if electrons and holes are not instantly depleted, they may recombine and energy is lost [3b, 4b, 13] …”

Steering Hole Transfer from the Light Absorber to Oxygen Evolution Sites for Photocatalytic Overall Water Splitting

“…This allows the functional groups (e.g., OH and OOH) on GO surface to bond with the amino group of melamine via hydrogen‐bond interaction, [ 33 ] which could reduce the sublimation of melamine during polycondensation (Figure S2, Supporting Information) thus forming a tight interface between the two components. [ 34 ] Then, the bulk g‐CN/rGO‐FeO x can be briefly obtained by calcinating the melamine/GO‐Fe(OH) 3 precursor at 550 °C in Ar, which induced the formation of g‐CN and the reduction of GO to rGO simultaneously. [ 35 ] Fourth, a top‐down exfoliation of bulk g‐CN in bulk g‐CN/rGO‐FeO x was proceeded to prepare 2D g‐CN/rGO‐FeO x .…”

Edge‐Site‐Rich Ordered Macroporous BiOCl Triggers CO Activation for Efficient CO2 Photoreduction

“…[ 1 ] However, CO 2 photoreduction efficiency is significantly plagued by the sluggish photo‐generated carriers transfer kinetics and insufficient CO 2 molecule adsorption/activation performance. [ 2 ] Meanwhile, the unclear migration mechanism of electron–hole pairs and the proton‐coupled electron transfer process also obstacle the precise construction of high‐performance materials for CO 2 photoreduction. [ 3 ] To achieve excellent photosynthesis efficiency, enhancing the charge separation and constructing active sites, CO 2 activation is an essential approach.…”