The metal-air batteries with the largest theoretical energy densities have been paid much
more attention. However, metal-air batteries including Li-air/O 2, Li-CO 2, Na-air/O 2, and Zn …

Zn–air batteries are becoming the promising power sources for portable and wearable
electronic devices and hybrid/electric vehicles because of their high specific energy density …

Nickel iron oxyhydroxide is the benchmark catalyst for the oxygen evolution reaction (OER)
in alkaline medium. Whereas the presence of Fe ions is essential to the high activity, the …

Creative approaches to the design of catalytic nanomaterials are necessary in achieving
environmentally sustainable energy sources. Integrating dissimilar metals into a single …

Superoxide ion (O2•–) is of great significance as a radical species implicated in diverse
chemical and biological systems. However, the chemistry knowledge of O2•–is rather …

High theoretical energy densities of metal battery anode materials have motivated research
in this area for several decades. Aluminum in an Al-air battery (AAB) is attractive due to its …

Catalysts for oxygen reduction and evolution reactions are at the heart of key renewable-
energy technologies including fuel cells and water splitting. Despite tremendous efforts …

Copper (Cu) oxides with various oxidation states are known to be extremely active for
oxygen reduction/evolution reactions (ORR/OER). Here, Cu 2 O-based composites by …

Aluminium–air cells are high-energy density (< 400 W h kg− 1) primary batteries developed
in the 1960s. This review shows the influence of the materials, including: aluminium alloy …

The high cost of platinum-based electrocatalysts for the oxygen reduction reaction (ORR)
has hindered the practical application of fuel cells. Thanks to its unique chemical and …