Tuning morphology, composition and oxygen reduction reaction (ORR) catalytic performance of manganese oxide particles fabricated by γ-radiation induced synthesis

Core–shell and heterostructured silver–nickel nanocatalysts fabricated by γ-radiation induced synthesis for oxygen reduction in alkaline media

“…70 For commercial Pt/C, our previous study confirmed that the obtained electrochemical parameters were within the normal range for the Pt/C catalyst (E onset =0.94 V, E 1/2 =0.82 V). 71 The diffusion limiting current density, j d values (shown in Table 1) of bimetallic Ag@NiO and Ag/Ni are higher…”

“…70 For commercial Pt/C, our previous study confirmed that the obtained electrochemical parameters were within the normal range for the Pt/C catalyst (E onset = 0.94 V, E 1/2 = 0.82 V). 71 The diffusion limiting current density, j d , values (shown in Table 1) of bimetallic Ag@NiO and Ag/Ni are higher (4.9 mA cm −2 ) than those of the monometallic catalysts and pretty close to those of Pt/C. The specific activity, SA, the current per unit catalyst surface area, is commonly used to reflect the intrinsic activity of the catalysts.…”

Scalable, inexpensive, one-pot, facile synthesis of crystalline two-dimensional birnessite flakes

“…[10][11][12] More recently, manganese oxides with a broad range of active-site configurations, nominal valence states, and nano-morphologies have been developed and tested as oxygen electrocatalysts, oxygen evolution reactions (OERs), and oxygen reduction reactions (ORRs) for some time. [13][14][15][16][17][18][19][20][21][22] What makes these materials attractive is their comparatively high activity, with respect to other non-platinum-group metals (non-PGMs), unique reversibility for oxygen electrocatalysis, and dramatically lower cost compared with other catalyst materials. [13][14][15][16][17][18][19][20][21][22] The electrocatalytic activity and reversibility have been related to the Mn 2+/3+ /Mn 4+ redox couples.…”

Micro-area investigation on electrochemical performance improvement with Co and Mn doping in PbO2 electrode materials

“…Actually, some researchers have stated that the most important factor determining the catalytic performance is the surface morphology of the electrode material. [8][9][10][11] It is a misconception that all tiny regions on an electrode share the same electrochemical reactivity. To solve this problem, a research method with high spatial resolution is needed to analyze the electrochemical reactivity variation on different micro-regions and further to establish the relationship between electrode performance and microscopic morphology.…”