Vanadium disulfide decorated graphitic carbon nitride for super-efficient solar-driven hydrogen evolution

WXy/g‐C3N4 (WXy=W2C, WS2, or W2N) Composites for Highly Efficient Photocatalytic Water Splitting

“…[1][2][3] Sustainable hydrogen production through renewable energy sources, such as solar,w ind and hydroelectric energies, is an attractive method. [11][12][13][14][15] Traditionally,n oble metalsw ith excellent HER activity are efficient cocatalysts for the photocatalytic reaction, especially the most popularP t, but their large-scale application are limited by high costs and scarcity. [4][5][6][7][8][9][10] Although numerous studies on photocatalytic hydrogen production have been performed,f urther investigation is still neededt oo btain highly activea nd stable photocatalysts and to understand the photocatalytic mechanism.…”

A Z‐Scheme Strategy that Utilizes ZnIn2S4 and Hierarchical VS2 Microflowers with Improved Charge‐Carrier Dynamics for Superior Photoelectrochemical Water Oxidation

“…Because of its good conductivity and abundant active sites, layered VS 2 also holds great potential in the hydrogen‐evolution reaction . Very few composite materials of VS 2 (e.g., with MoS 2 and C 3 N 4 ) have been developed for superior hydrogen‐evolution activity and yet, based on the calculated energy‐level alignment of VS 2 , it is a favorable candidate to form Z‐scheme heterostructures with ZnIn 2 S 4 . Therefore, herein, we report the first synthesis of a noble‐metal‐free composite of ZnIn 2 S 4 –VS 2 , with the aim of forming a direct Z‐scheme composite material without an electron mediator.…”

“…[23,24] Because of itsg ood conductivity and abundant active sites, layered VS 2 also holds great potentiali n the hydrogen-evolution reaction. [25] Very few composite materials of VS 2 (e.g.,w ith MoS 2 [25] and C 3 N 4 [26] )h ave been developed for superiorh ydrogen-evolution activity and yet, based on the calculated energy-levelalignment of VS 2 ,itisafavorable candi-date to form Z-scheme heterostructures with ZnIn 2 S 4 .T herefore, herein, we report the first synthesis of an oble-metal-free composite of ZnIn 2 S 4 -VS 2 ,w ith the aim of formingadirect Zscheme composite materialw ithout an electron mediator. Because of the good alignment of the valence-band edgeo f ZnIn 2 S 4 with the conduction-bande dge of VS 2 ,t he recombination of photogenerated electron holes at the interface was favorable,t herebyl eaving behind photogenerated electrons in the conduction band of ZnIn 2 S 4 ,w hilst the holes were left behind in the valence band of VS 2 with ah igher oxidation potential for efficient water oxidation.…”

Synthesis of Ru‐Doped VN by a Soft‐Urea Pathway as an Efficient Catalyst for Hydrogen Evolution

“…In addition, the TEM images (Figure c and 2d) further verify its plate‐like morphology, consistent with SEM observations. The lattice fringes with a spacing of 2.40 and 2.08 Å in the high resolution TEM (HRTEM) images (Figure e–2 h) are associated with the (111) and (200) crystal planes of cubic VN, respectively . No Ru or Ru oxides nanoparticles can be observed, implying the highly dispersion of Ru species.…”

“…The lattice fringes with a spacing of 2.40 and 2.08 Å in the high resolution TEM (HRTEM) images (Figure 2e-2 h) are associated with the (111) and (200) crystal planes of cubic VN, respectively. [59,60] No Ru or Ru oxides nanoparticles can be observed, implying the highly dispersion of Ru species. To further elucidate the existence of Ru element 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 in RuÀ VN-2 catalyst, the STEM elemental mapping analysis is also conducted (Figure 2i).…”