Exfoliation of layered bulk g-C N (CNB) to thin g-C N sheets in nanodomains has attracted much attention in photocatalysis because of the intriguing properties of nanoscaled g-C N . This study shows that carbon-rich g-C N nanosheets (CNSC) can be easily prepared by self-modification of polymeric melon units through successively thermally treating bulk g-C N in an air and N atmosphere. The prepared CNSC not only retain the outstanding properties of nanosheets, such as large surface area, high aspect ratios, and short charges diffusion distance, but also overcome the drawback of enlarged bandgap caused by the quantum size effect, resulting in an enhanced utilization of visible light and photoinduced electron delocalization ability. Therefore, the as-prepared CNSC show a high hydrogen evolution rate of 39.6 µmol h with a turnover number of 24.98 in 1 h at λ > 400 nm. Under irradiation by longer wavelength of light (λ > 420 nm), CNSC still exhibit a superior hydrogen evolution rate, which is 72.9 and 5.4 times higher than that of bulk g-C N and g-C N nanosheets, respectively.

What inspired you for the cover image? The fairy tale "Jack andt he Beanstalk" inspired us for the cover image. In our work, the catalystP t/WO x ,a st he conventional soil, catalyzest he hydrogenolysis of glycerol to 1,3-propanediol with af air glycerolc onversion and 1-propanol (by-product) as the dominant products. The Au promoter servesa s" the magic bean",l ittle but powerful. In our story,i ntroducing Au to Pt/ WO x resembles throwing the magic beans to the soil, and leads to as imultaneous substantial increaseo fb oth glycerol conversion and 1,3-propanediol, reflected by the strengthened beanstalk (glycerol conversion) and blossomed flowers(1,3-propanediol yield) in the cover image. This improvementw as attributed to the increase of in situ-generated Brønsteda cid sites by forming frustrated Lewis pairs with the assistance of H 2 ,s ymbolized with the flying butterflies with spatially separated H + and H À wings.

No abstract

Selective cleavage of secondary C−O bond is an important yet challenging strategy in glycerol valorization, and the product 1,3‐propanediol (1,3‐PDO) is of great value in polyester industry. Herein, we report a series of Pt/WOx/Al2O3 catalysts for selective hydrogenolysis of glycerol in a fixed‐bed reactor and obtain the highest space‐time yield of 1,3‐PDO (191.7*10−3 g1,3‐PDO h−1 g−1cat.) to date. Both Pt and W have substantial effects on the 1,3‐PDO yield with the optimum Pt/W atomic ratio of 1/2∼1/4. Spectroscopy characterizations as well as chemisorption experiments reveal that at the medium domain size of WOx, hydrogen spillover can take place to the greatest extent due to the improved dispersion of Pt and the suitable reducibility of WOx. Dehydration/dehydrogenation tests of 2‐butanol suggest that strong Brønsted acid sites are created via hydrogen dissociation at the Pt−WOx interface and spillover to the neighboring oxygen atom. Such in situ formed protons are critical to the selective cleavage of secondary C−O bonds of polyols.

A facet junction (also called facet heterojunction or surface heterojunction) is defined as a complex polyhedral single crystal exposed to two, three, or four types of crystallographic planes, and is a promising platform for achieving multifunctional photocatalysis. Compared with simple polyhedral counterparts enclosed by the same crystallographic planes or conventional heterogeneous junctions, facet junctions have notable facet-crosslinking effects arising from different electronic structures of heterogeneous facets, which is beneficial for promoting the transfer and separation of photogenerated charge carriers in a single-crystalline semiconductor without the introduction of external species or interfaces. However, there are few specialized review articles on facet junction engineering of photocatalysts. Herein, an overview of facet junctionbased photocatalysts is provided based on the following aspects: elementary knowledge, microstructural features, intrinsic facet-synergistic mechanisms, functional modifications, enhanced photocatalytic mechanisms, challenges and issues, and directions for future investigations. This review article will act as a theoretical base for researchers who are focused on facet-dependent effects to design and fabricate new photocatalysts.

No abstract

No abstract

No abstract