The Haber–Bosch process for industrial-scale NH3 production suffers from high energy consume and serious CO2 emission. Electrochemical N2 reduction is an attractive carbon-neutral alternative for NH3 synthesis but severely challenged...
The electrochemical N2 reduction reaction (NRR) demonstrates
a process of NH3 synthesis from N2 molecules
under ambient conditions, which is environmentally friendly and recyclable.
However, it requires an efficient electrocatalyst to activate inert
N2 molecules, which is still difficult to satisfy. Recently,
as an active NRR electrocatalyst and a typical metal oxide, CeO2 has featured ultrahigh thermal stability and the ability
to apply heteroatom doping, which is an imperative approach importing
oxygen vacancy by replacing metal ions with selective elements to
greatly influence the activity of catalysts. Here, we analyze the
unique properties of manganese dopants in modulating the activity
of CeO2 nanospheres for NRR. It attains a larger NH3 yield of 27.79 μg h–1 mgcat
–1 and a higher Faradaic efficiency of 9.1% than
pure CeO2 at −0.30 V in 0.1 M HCl, with high electrochemical
and structure stability. With calculations by density functional theory,
the performance enhancement of Mn-doped CeO2 is also proved
mathematically.
Explorations of solid-state lithium metal batteries (SLMBs) with high-performance hybrid polymer electrolytes are the demand for the development of novel energy storage systems with enhanced safeties and high theoretical energy...
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