AI Article Synopsis
- Researchers developed a new catalyst for the hydrogen evolution reaction (HER) by combining Ru and MoC nanoparticles into a heterostructure, enhancing catalytic activity through their synergistic effects.
- The synthesis leveraged a ZnMo metal-organic framework (MOF) as a precursor, incorporating phosphomolybdic acid to create a unique nano-bowl structure while providing a source of Mo.
- The resulting Ru-MoC@NPC catalyst exhibited impressive performance in various pH environments, outperforming many existing catalysts with overpotentials of just 62, 64, and 170 mV across different solutions.
Article Abstract
Considering the extensive research studies on Ru and MoC for the hydrogen evolution reaction (HER), the construction of heterostructure catalysts containing both Ru and MoC nanoparticles can further improve the catalytic activity by the synergistic effect of different species. In this work, we report the synthesis of N,P co-doped carbon coated Ru and MoC nanoparticles for the HER using a ZnMo metal-organic framework (MOF) as the precursor. The addition of phosphomolybdic acid during the synthesis of a Zn-MOF not only provides a Mo source for the formation of MoC, but also induces a nano-bowl structure. After anchoring RuCl in the ZnMo-MOF and thermal annealing, Ru and MoC nanoparticles encapsulated in N,P doped carbon (Ru-MoC@NPC) were synthesized and the nano-bowl morphology was well preserved. Due to the co-existence of the highly active catalytic species Ru and MoC, a large specific surface area owing to the evaporation of Zn during the calcination process, and the nano-bowl-like morphology that boosts mass transfer, Ru-MoC@NPC exhibits good catalytic activity for the HER over a wide pH range, with overpotentials of 62, 64 and 170 mV in 0.5 M HSO, 1 M KOH and 1 M PBS solution at 10 mA cm, surpassing the values for many Ru and MoC based catalysts. This work provides a feasible route for designing high performance HER catalysts.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/d4dt02125h | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Oxygen Vacancy-Mediated Synthesis of Inter-Atomically Ordered Ultrafine Pt-Alloy Nanoparticles for Enhanced Fuel Cell Performance.
J Am Chem Soc
November 2024
State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China.
Pt-based intermetallics are expected to be the highly active catalysts for oxygen reduction reaction (ORR) in proton-exchange membrane fuel cells but still face great challenges in controllable synthesis of interatomically ordered and ultrafine intermetallic nanoparticles. Here, we propose an oxygen vacancy-mediated atomic diffusion strategy by mechanical alloying to reduce the energy barrier of the transition from interatomic disordering to ordering, and to resist interparticulate sintering via strong M-O-C bonding. This synthesis results in a nanosized core/shell structure featuring an interatomically ordered PtM core and a Pt shell of two to three atomic layers in thickness and can be extended to the multicomponent PtM (M = Co, FeCo, FeCoNi, FeCoNiGa) systems.
View Article and Find Full Text PDFElectrospun Co-MoC Nanoparticles Embedded in Carbon Nanofibers for Highly Efficient pH-Universal Hydrogen Evolution Reaction and Alkaline Overall Water Splitting.
Small Methods
October 2024
State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, Xinjiang, 830017, P. R. China.
Article Synopsis
- Researchers developed Co-MoC nanoparticles within nitrogen-doped carbon nanofibers, showcasing a unique bamboo-like structure to tackle the challenges in efficient electrocatalysts for hydrogen evolution reactions (HER) and water splitting across different pH levels.
- The combination of ultra-small MoC particles (≈5 nm) and cobalt (Co) optimizes the catalyst's electronic structure and enhances its electrocatalytic performance, achieving low overpotentials (86, 116, and 145 mV) for significant current density in alkaline, acidic, and neutral conditions.
- The study highlights the potential of these Co-MoC/NCNFs in energy conversion applications, with a low required cell voltage of 1.59
Deciphering promotion of MoP over MoC in Pt catalysts for methanol-assisted water splitting reaction.
J Colloid Interface Sci
February 2025
School of Chemistry and Chemical Engineering, Yangzhou University, No 180, Siwangting Road, Yangzhou 225002, China. Electronic address:
Molybdenum-based compounds show promising promotion effects on Pt catalysts for energy-relevant catalysis reactions. Herein, a more effective promotion effect of MoP than MoC was found in assisting Pt nanoparticles for methanol-assisted hydrogen generation in light of the strong metal-support interaction and synergistic effect between Pt and MoP/C nanospheres. Electrochemical analyses and theoretical calculations demonstrated that Pt-MoP/C facilitated the oxidation and removal of CO intermediates more effectively than Pt-MoC/C.
View Article and Find Full Text PDFDevelopment of photoelectrochemical immunosensor based on halide perovskite protected by organometallic compounds for determining interleukin-17A (IL-17A).
Mikrochim Acta
October 2024
Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China.
The overexpression of interleukin-17A (IL-17A) is closely associated with the pathogenesis of autoimmune diseases and cancer, rendering precise identification of IL-17A level critical for disease diagnosis and prognosis monitoring. In this study, CsPbBr nanoclusters (NCs) were embedded in CHBrOPb organometallic compound (Pb-MA MOC) via a hot injection approach. Through this way, the issue of CsPbBr NCs susceptible to decomposition in water was solved, and the photocurrent intensity that is generated by CsPbBr was significantly enhanced.
View Article and Find Full Text PDFCombination non-targeted and sGRP78-targeted nanoparticle drug delivery outperforms either component to treat metastatic ovarian cancer.
J Control Release
November 2024
Department of Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, USA; Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46556, USA; Berthiaume Institute for Precision Health, University of Notre Dame, Notre Dame, IN 46556, USA; Department of Chemistry & Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA; Center for Rare & Neglected Diseases, University of Notre Dame, Notre Dame, IN 46556, USA. Electronic address:
Metastatic ovarian cancer (MOC) is highly deadly, due in part to the limited efficacy of standard-of-care chemotherapies to metastatic tumors and non-adherent cancer cells. Here, we demonstrated the effectiveness of a combination therapy of GRP78-targeted (TNP) and non-targeted (NP) nanoparticles to deliver a novel DM1-prodrug to MOC in a syngeneic mouse model. Cell surface-GRP78 is overexpressed in MOC, making GRP78 an optimal target for selective delivery of nanoparticles to MOC.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!