A Janus structured TaO/TaN heterojunction as an efficient oxygen reduction electrocatalyst for HO production.

A Janus TaO/TaN heterojunction hybrid with graphene exhibited excellent activity, selectivity and durability for the 2e oxygen reduction reaction (ORR), compared to TaON@Gr, due to the optimized O adsorption and favored *OOH binding in the Janus TaO/TaN heterojunction. This provides a new approach for the structural design of high-performance 2e ORR catalysts.

Janus structural TaON/Graphene-like carbon dual-supported Pt electrocatalyst enables efficient oxygen reduction reaction.

Developing carbon-supported Pt-based electrocatalysts with high activity and long-durability for the oxygen reduction reaction (ORR) is an enormous challenge for their commercial applications due to the corrosion of carbon supports in acid/alkaline solution at high potential. In this work, a Janus structural TaON/graphene-like carbon (GLC) was synthesized via an in-situ molecular selfassembly strategy, which was used as a dual-carrier for platinum (Pt). The as-obtained Pt/TaON/GLC presents high half-wave potential (0.

Construction of Type-II Heterojunctions in Crystalline Carbon Nitride for Efficient Photocatalytic H Evolution.

As an encouraging photocatalyst, crystalline carbon nitride (CCN) exhibits unsatisfactory photocatalytic activity and stability due to its rapid recombination of photo-generative carriers. Herein, high-crystalline g-CN was prepared, including CCN obtained in KCl (K-CCN), LiCl-KCl mixture (Li/K-CCN), and LiCl-NaCl-KCl mixture (Li/Na/K-CCN), via the molten salt strategy using pre-prepared bulk carbon nitride (BCN) as a precursor. The obtained BCN sample was formed by heptazine-based units, which convert into triazine-based units for K-CCN.

Oxygen Vacancy Induced Atom-Level Interface in Z-Scheme SnO/SnNbO Heterojunctions for Robust Solar-Driven CO Conversion.

The modulation of Z-scheme charge transfer is essential for efficient heterostructure toward photocatalytic CO reduction. However, constructing a compact hetero-interface favoring the Z-scheme charge transfer remains a great challenge. In this work, an interfacial Nb-O-Sn bond and built-in electric field-modulated Z-scheme O-SnO/SnNbO heterojunction was prepared for efficient photocatalytic CO conversion.

Weakened Crystalline SnNb O for Enhanced Performance in Photocatalytic H Production and CO Reduction.

Low crystalline photocatalysts with unsaturated active sites, such as oxygen vacancy (O ), is reported to exhibit enhanced adsorption and activation of oxygen-containing small molecules, such as H O and CO , thus boosting the activity in photocatalytic H evolution and CO reduction. However, numerous low-crystalline photocatalysts show unsatisfactory stability due to the easily repaired surface O . Herein, three SnNb O with different crystallinity were prepared by hydrothermal approach with similar precursors.

Cluster-derived TiO nanocrystals with multiple carbon coupling for interfacial pseudo-capacitive lithium storage.

TiO is one of the most promising anode materials for lithium ion batteries (LIBs) due to its safe working potentials and small volume changes during lithium insertion/extraction. However, its inherently poor electronic and ionic conductivities have restricted its practical applications. Herein, well-defined TiO nanocrystals were prepared from an atomically precise titanium-oxo cluster (Ti8Ph) and then coupled with carbon layers and graphene nanosheets.

Molecular Self-Assembly of Oxygen Deep-Doped Ultrathin CN with a Built-In Electric Field for Efficient Photocatalytic H Evolution.

Heteroatom-doped carbon nitride (CN) with a built-in electric field can reinforce the carrier separation; however, the stability will be greatly reduced due to the loss of surface-doped atoms. Here, molecule self-assembly, as a facile bottom-up approach, is explored for the synthesis and oxygen doping of CN. The obtained CN presents a porous and ultrathin structure and oxygen deep-doping, which generate abundant nitrogen vacancies and a stable built-in electric field.

Complementary behavior of doping and loading in Ag/C-ZnTaO for efficient visible-light photocatalytic redox towards broad wastewater remediation.

This work reports on the simple fabrication of a silver loaded and carbon doped zinc tantalate (Ag/C-ZnTaO) photocatalyst with visible light photocatalytic activity toward broad wastewater remediation, including high photo-reduction of Cr(vi) (98.4% in 210 min), excellent photo-oxidation of tetracycline hydrochloride (94.7% in 210 min), and superior photo-degradation of multiple dyes (>99.

Assembling BiMoO/Ru/g-CN for Highly Effective Oxygen Generation from Water Splitting under Visible-Light Irradiation.

Water oxidation is a kinetically challenging reaction for photocatalytic overall water splitting. Producing one molecule of O will consume four electrons, so it is an extremely difficult obstacle for researchers. Here, a BiMoO/Ru/g-CN composite was obtained by a gentle hydrothermal method, which could oxidize water into O highly efficiently.

Enhanced photocatalytic activity of Ag/AgTaO/g-CN under wide-spectrum-light irradiation: H evolution from water reduction without co-catalyst.

Designing a superior and stable catalyst toward H evolution under solar light to solve the energy crisis has attracted wide concern. Herein, we have constructed a novel heterojunction photocatalyst Ag/AgTaO/g-CN by in situ assembly, which can efficiently split water to generate H by utilizing wide-spectrum-light irradiation. Optimal H production reaches highly to 253.

Regulating effect of heterojunctions on electrocatalytic oxidation of methanol for Pt/WO-NaTaO catalysts.

Pt/WO3-NaTaO3 composite catalysts for different W/Ta molar ratios were obtained via a facile hydrothermal method. The WO3-NaTaO3 heterojunction was constituted and could be regulated by the adjustment of the W : Ta ratio, as confirmed by multiple characterizations. Due to the favorable CO anti-poisoning characteristics ascribed to the sufficient surface -OHad provided by both WO3 and NaTaO3, excellent stability of the WO3-NaTaO3 composite in acidic and alkaline environments, and charge transfer from metal oxide to Pt, the as-obtained Pt/WO3-NaTaO3 composite catalyst could exhibit desirably high electrocatalytic performances.

Investigation of the Preferential Doping Site and Regulating on the Visible Light Response and Redox Performance for Fe- and/or La-Doped InNbO.

The preferential doping site, visible light response, and redox potential of Fe- and/or La-doped InNbO (INO) were investigated using first-principles density functional theory. Eight designed doping models, including Fe and/or La doping at In or/and Nb sites of INO are constructed, respectively. It was found that Fe-doping and Fe,La-codoping to substitute In into an INO cell are energetically favorable, confirming that the steric hindrance plays a vital role for the selective doping site than the charge of the dopants.

K4Nb6O17·4.5H2O: a novel dual functional material with quick photoreduction of Cr(VI) and high adsorptive capacity of Cr(III).

A series of orthorhombic phase K4Nb6O17·4.5H2O was synthesized via a hydrothermal approach. When presented in an acidic pH range, K4Nb6O17·4.

A novel adsorbent of Na(2)Ta(2)O(6) porous microspheres with F(-) gradient concentration distribution: high cationic selectivity and well-regulated recycling.

Pyrochlore Na2Ta2O6 porous microspheres with F(-) gradient concentration distribution were first prepared, which showed an excellent selectivity toward cationic dyes as an adsorbent. These dyes were regenerated rapidly by adding to NaAc solution. After then, the adsorbent still showed a high adsorption capacity.

Preparation of nanoscale PbSe particles with different morphologies in diethylene glycol.

Nanoscale PbSe particles with different morphologies including octahedral, tetradecahedral and cubic shapes have been successfully prepared in diethylene glycol (DEG) at 240 degrees C in the presence of PVP-K30: poly(vinyl pyrrolidone), M(W) = 50 000. The formation of PbSe is believed to be an elemental recombination process of corresponding elements reduced from their precursors by the solvent. Experimental results showed that a prominent morphological variation was observed through varying the molar ratios of selenius acid to Pb(2+) when Pb(Ac)(2) was used as lead precursor, while the sizes of the final PbSe products tended to increase along with the increase of the molar ratios of selenius acid to Pb(2+) when Pb(NO(3))(2) was used as lead precursor.