Hydrothermal treatment of nickel acetate and phosphoric acid aqueous solution followed with a carbothermal reduction assisted phosphorization process using sucrose as the carbon source for the controlled synthesis of NiP/C was successfully realized for the first time. The critical synthesis factors, including reduction temperature, phosphorus/nickel ratio, pH, and sucrose amount were systematically investigated. Remarkably, the carbon serves as a reducer and plays a determinative role in the transformation of NiPO into NiP/C. The synthesis strategy is divided into four distinguishable stages: (1) hydrothermal preparation of Ni(PO)·8HO precursor for stabilizing P sources; (2) dimerization of Ni(PO)·8HO into more thermal stable NiPO amorphous phase along with the generation of NiO; (3) carbothermal reduction and phosphidation of NiO into NiP (0 ≤ y/x ≤ 0.5); and (4) further phosphidation of mixed-phase NiP and carbothermal reduction of NiPO into single-phase NiP. The resultant NiP, the highly active phase in electrocatalysis, was applied as counter electrode in a dye-sensitized solar cell (DSSC). The DSSC based on NiP with 10.4 wt.% carbon delivers a power conversion efficiency of 9.57%, superior to that of state-of-the-art Pt-based cell (8.12%). The abundant Ni and P active sites and the metal-like conductivity account for its outstanding catalytic performance.
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http://dx.doi.org/10.1021/acsami.7b03541 | DOI Listing |
Sci Rep
January 2025
Technology Innovation, PT Pertamina (Persero), Jl. Raya Bekasi KM. 20 Cakung, East Jakarta, Jakarta, 13920, Republic of Indonesia.
Selective lithium recovery from a mixture of LFP-NMC spent lithium batteries presents significant challenges due to differing structures and elemental compositions of the batteries. These differences necessitate a distinct recycling pathway for each, complicating the process for the mixture. This study explored a carbothermal reduction approach combined with water leaching under atmospheric conditions to achieve a selective lithium recovery.
View Article and Find Full Text PDFDalton Trans
January 2025
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
Silicon is utilized as a functional material in various fields such as semiconductors, bio-medicine, and solar energy. To prepare Si materials, researchers have proposed methods including carbothermal reduction, hydrothermal reduction, and magnesiothermal reduction, but these strategies often involve high temperatures or unwanted by-products. Herein, we present a low-temperature ionic liquid reduction system to prepare Si nanospheres based on 1-butyl-3-methylimidazolium chloride-aluminum chloride ([Bmim]Cl-AlCl).
View Article and Find Full Text PDFNano Lett
January 2025
School of Environment, Tsinghua University, Beijing 100084, China.
Exploiting cost-effective hydrogen evolution reaction (HER) catalysts is crucial for sustainable hydrogen production. However, currently reported nanocatalysts usually cannot simultaneously sustain high catalytic activity and long-term durability. Here, we report the efficient synthesis and activity tailoring of a chainmail catalyst, isolated platinum atom anchored tungsten carbide nanocrystals encapsulated inside carbon nanotubes (Pt/WC@CNTs), by confined flash Joule heating technique.
View Article and Find Full Text PDFMolecules
December 2024
International Institute for Materials Innovation, Nanchang University, Nanchang 330031, China.
Piezocatalytic materials have attracted widespread attention in the fields of clean energy and water treatment because of their ability to convert mechanical energy directly into chemical energy. In this study, γ-AlON particles synthesised using carbothermal reduction and nitridation (CRN) were used for the first time as a novel piezocatalytic material to degrade dye solutions under ultrasonic vibration. The γ-AlON particles exhibited good performance as a piezocatalytic material for the degradation of organic pollutants.
View Article and Find Full Text PDFEnviron Res
December 2024
College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China. Electronic address:
The development of a photoelectrode featuring both excellent reusability and a simple preparation process remains exceptionally challenging for TiO-based photoelectrocatalytic technology. Herein, a three-dimensional photoelectrode with N doping, oxygen vacancies (O), and carbon layers (NTC) was prepared via the "carbothermal reduction-pressing-calcination" method. The photoelectrode degraded 97.
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