Facile preparation of Ag-Cu bifunctional electrocatalysts for zinc-air batteries

Highly active and stable AuNi dendrites as an electrocatalyst for the oxygen reduction reaction in alkaline media

“…S6a, c † that the catalytic current densities increase with an increase in the rotating rates, which indicates that the catalytic reaction of the AuNi catalysts for ORR is controlled by the mass transport of O 2 to the surface of the catalysts. 4 The electron-transfer number was further analyzed by the Koutecky-Levich (K-L) plots, as the disk voltammetric current density (j) may involve both kinetic (j k ) and diffusion-limiting (j d ) current densities contributions. The K-L plots show the inverse current density (j (2) j k = nFkC 0…”

“…Renewable energy technologies, such as metal-air batteries and alkaline fuel cells, have garnered considerable interests because they are expected to become the reliable sources of clean energy in both mobile applications and energy conversion/storage devices. [1][2][3][4] It is well acknowledged that the kinetics of oxygen reduction reaction (ORR, O 2 + 2H 2 O + 4e -→ 4OH -) at the cathode of these electrochemical devices is intrinsically sluggish, thus, this reaction requires a large amount of catalysts to achieve adequate energy efficiency. [1][2][3][4][5] Hitherto, platinum (Pt) has been regarded as the stateof-the-art catalyst applied in such technologies.…”

“…[1][2][3][4] It is well acknowledged that the kinetics of oxygen reduction reaction (ORR, O 2 + 2H 2 O + 4e -→ 4OH -) at the cathode of these electrochemical devices is intrinsically sluggish, thus, this reaction requires a large amount of catalysts to achieve adequate energy efficiency. [1][2][3][4][5] Hitherto, platinum (Pt) has been regarded as the stateof-the-art catalyst applied in such technologies. However, Pt and Ptbased alloys suffer from severe durability problems, 3, 6 together with high cost and scarcity, 7, 8 limiting their wide-spread application in industry.…”

One‐Pot Synthesis of Dealloyed AuNi Nanodendrite as a Bifunctional Electrocatalyst for Oxygen Reduction and Borohydride Oxidation Reaction

“…Increasing environmental and economic concerns have made clean power sources more attractive . Metal–air batteries and fuel cells provide a promising pathway for alternative energy storage and conversion . However, the electrochemical processes involved in these renewable energy technologies, such as the anodic oxidation reaction and the cathodic reduction reaction, usually suffer from the sluggish kinetics, which greatly reduces the energy efficiency and hinders the further development of such technologies .…”

Investigation of alternative materials as bifunctional catalysts for electrochemical applications

“…7, Zn sheets that have been used during cycling can be seen. The formation of ZnO structures that increase the polarization and lead to degradation can easily be observed [12,13]. Although, much less ZnO formed during pulsed cycling than during non-pulsed cycling, even if the total time of pulsed cycling was longer.…”