Design of Co-NC as efficient electrocatalyst: The unique structure and active site for remarkable durability of proton exchange membrane fuel cells

Molecular design and coordination regulation of atomically dispersed bi-functional catalysts for oxygen electrocatalysis

“…From the aspect of durability, Yoo et al designed a Co–N–C catalyst derived from a melamine-encapsulated Co–ZnO–C composite. 89 DFT calculations revealed the propensity of the CoN 4 species for the four-electron ORR due to its blocking interaction with organic adducts, and better stability than Fe, Ni, Cr, and Mn-based M–N–Cs. As shown in Fig.…”

“…The feasibility of Co-based SACs for application in ORR catalysis was confirmed by some reported studies. 86–89 Wu et al proposed a negative-pressure pyrolysis strategy to prepare Co single atoms dispersed on the graphene framework (Co SAs/3D GFs), achieving a half-wave potential of 0.901 V in 0.1 SM KOH solution. 88 In situ transmission electron microscopy (TEM) and DFT calculations indicated that the activity benefited from the adjacent defect-assisted Co centers.…”

Understanding the mechanism and synergistic interaction of cobalt-based electrocatalysts containing nitrogen-doped carbon for 4 e− ORR

“…The unimodal mesopores formed from the incorporation of melamine signicantly affected the catalytic performance in the fuel cell. 108 Co-N x -type catalysts have been shown to favour the 4 e − and 2 e − process. To gain insight into the structure-function Recently, Caiyan Zheng examined the effect of nitrogen on the activity of 3d M-N x -type catalysts.…”

“…The unimodal mesopores formed from the incorporation of melamine significantly affected the catalytic performance in the fuel cell. 108…”

Self-flooding behaviors on the fuel cell catalyst surface: an in situ mechanism investigation

“…Within this framework, under the proper working conditions, the highly efficient FC devices should have enriched triple-phase boundaries (TPBs) of the electrolyte, catalyst, and reactant gas as the reactive zones. 23–25 Therefore, the flooding behaviors at the catalyst layer, where the reactions happen and ions/water form, can seriously affect the cell efficiency. However, in the literature, it was reported that the flooding is usually only observed at the gas diffusion layer (GDL), a place apart from the electrode reactions.…”