Phys.org November 14, 2022 Electrosynthesis of ammonia from nitrogen reduction reaction (NRR) at ambient conditions has been widely regarded as a green ammonia synthesis technology to replace the traditional energy- and capital-intensive Haber-Bosch process. Although single-atom electrocatalysts (SACs) may create a new catalytic paradigm, one of the key challenges hindering the rational design and development of SACs is the lack of insight into the relationship between performance and SA loading. An international team of researchers (China, Australia) demonstrated an adsorption-regulated synthetic method that uses bacterial cellulose as an adsorption regulator to control Fe3+/Co2+ impregnation on bacterial cellulose through carbothermal reduction. […]
Tag Archives: Electrocatalysts
Researchers develop world’s most durable hydrogen fuel cell
Nanowerk July 2, 2022 An international team of researchers (Hong Kong, USA – Argonne National Laboratory, China, Morocco) has designed a hybrid electrocatalyst that consists of atomically dispersed Pt and Fe single atoms and Pt–Fe alloy nanoparticles. Its Pt mass activity is 3.7 times higher than that of commercial Pt/C in a fuel cell. The fuel cell with a low Pt loading in the cathode shows an excellent durability, with a 97% activity retention after 100,000 cycles and no noticeable current drop at 0.6 V for over 200 hours. These results highlight the importance of the synergistic effects among active sites in […]
Carbon-coated nickel enables fuel cell free of precious metals
Science Daily March 24, 2022 An international team of researchers (USA – Cornell University, University of Madison, Japan, China) designed a nickel-based electrocatalyst with a 2-nanometer shell made of nitrogen-doped carbon. Their hydrogen fuel cell has an anode catalyst consisting of a solid nickel core surrounded by the carbon shell. When paired with a cobalt-manganese cathode, the resulting completely precious-metal-free hydrogen fuel cell outputs more than 200 milliwatts per square centimeter. The nickel oxide species on the surface of the nickel electrode slows the hydrogen oxidation reaction dramatically. The nitrogen-doped carbon coating serves as a protection layer and enhances the […]