A5013694721- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Electrochemical Analysis and Applications
- Advancements in Solid Oxide Fuel Cells
- Solar Thermal and Photovoltaic Systems
- Advanced Memory and Neural Computing
- Advanced Battery Materials and Technologies
Instituto de Catálisis y Petroleoquímica
2022-2024
Institute of Catalysis and Petrochemistry
2023
The production of green hydrogen in water electrolyzers is limited by the oxygen evolution reaction (OER). State-of-the-art electrocatalysts are based on Ir. Ru a suitable alternative provided their performance improved. Here we show that low-Ru-content pyrochlores (R2MnRuO7, R = Y, Tb and Dy) display high activity durability for OER acidic media. Y2MnRuO7 most stable catalyst, displaying 1.5 V at 10 mA cm-2 40 h, or 5000 cycles up to 1.7 V. Computational experimental results owed sites...
This work reports a family of Ru-based perovskites for acid OER. Dy 2 NiRuO 6 displays the highest activity and stability more than 400 OER cycles. Its high is related to short Ru–O bonds surface local ratio Ni : Ru close 1 1.
A mixed oxide with the crystal structure of DyMn2O5 family, namely NdMn1.5Ru0.5O5, is reported active for oxygen evolution reaction (OER) in acidic media. NdMn1.5Ru0.5O5 displays high OER activity 500 gRu−1 at 1.5 V. Moreover, more stable than most Ru oxides to date, remaining cycles between 1.1. and 1.7 V low scan rate 10 mV s−1. The stability are attributed cations, as NdMn2O5 exhibits very activity. has particularly short Ru–Ru distances 2.60 Å, a value close metallic around 2.642 Å....
The demand of green hydrogen, that is, the hydrogen produced from water electrolysis, is expected to increase dramatically in coming years. State‐of‐the‐art proton exchange membrane electrolysis (PEMWE) uses high loadings platinum group metals, such as Pt electrode where produced. Alternative electrodes based on phosphides, sulfides, nitrides, and other low‐cost alternatives are under investigation. Herein, a simple process for preparation RuP with activity evolution reaction (HER) acidic...
ABSTRACT Ni, Fe‐based nitrides have been widely studied for the hydrogen evolution reaction (HER) and oxygen (OER) in alkaline media, displaying electrocatalytic activities similar to Pt other noble metal electrocatalysts. The incorporation of small amounts Mo or W on these is expected a significant effect performance materials, especially HER activity. In this work, transition (TMNs) with empirical formula Ni 1+ x Fe 3− − y A N (A = Mo, W), were obtained two steps: synthesis oxide...
NdMn1.5Ru0.5O5 behaves as a bifunctional catalyst for oxygen evolution and reduction reactions in acidic electrolyte. It presents an ORR onset potential of 0.84 V displays one the highest OER activities reported to date, with 1.46 reach 10 mA cm−2 460 A gRu−1 at 1.5 V. exhibits low index 0.88 (difference between -3 cm-2 mAcm-2 OER). The activity shown by this mixed oxide structure, first time on kind can be ascribed presence two types active atoms, Mn Ru, occupying different positions...
NdMn1.5Ru0.5O5 behaves as a bifunctional catalyst for oxygen evolution and reduction reactions in acidic electrolyte. It presents an ORR onset potential of 0.84 V displays one the highest OER activities reported to date, with 1.46 reach 10 mA cm−2 460 A gRu−1 at 1.5 V. exhibits low index 0.94 (difference between −3 cm-2 mAcm-2 OER). The activity shown by this mixed oxide structure, first time on kind can be ascribed presence two types active atoms, Mn Ru, occupying different positions...
Ni, Fe-based nitrides have been widely studied in the last years due to their interesting properties such as high electrical conductivity and versatile physical chemical properties. In particular, they were for hydrogen evolution reaction (HER) oxygen (OER) alkaline media, displaying electrocatalytic activities similar Pt other conventional noble metal electrocatalysts. Apart from them, 2nd 3rd row transition (TMNs) like Mo W-based can display HER activity, surpassing those of...