Modulation of bulk and surface electronic structures for oxygen evolution by Cr, P co-doped Co₃S₄

Abstract

Co3S4 was doped by Cr in bulk phase and P on surface to achieve a low overpotential of 257 mV and a long-term durability over 48 h during oxygen evolution...

Dual doping: An emerging strategy to construct efficient metal catalysts for water electrolysis

“…Chen et al developed a Cr/P codoped Co 3 S 4 catalyst (Cr, P-Co 3 S 4 ) with a hydrothermal treatment-phosphorization process. 149 As shown in Figure 5A, the incorporation of Cr and P dopants regulates the charge of nearby Co and S atoms and leads to charge redistribution within the lattice. Compared with the single Cr or P doped Co 3 S 4 , the dual doping process shows a more negative formation energy (Figure 5B), indicating the spontaneous formation and stable existence of the Cr, P-Co 3 S 4 catalyst.…”

“…Chen et al. developed a Cr/P co‐doped Co 3 S 4 catalyst (Cr, P‐Co 3 S 4 ) with a hydrothermal treatment‐phosphorization process 149 . As shown in Figure 5A, the incorporation of Cr and P dopants regulates the charge of nearby Co and S atoms and leads to charge redistribution within the lattice.…”

Theoretical and Experimental Aspects of Electrocatalysts for Oxygen Evolution Reaction

“…The Tafel plot can be derived from the LSV curves and the slope values can be obtained using Equations ( 12) -( 14). [88] h¼aþblogðjÞ (12) a¼2:303RTlogi 0 =anF (13) b¼2:303RT=anF (14) where b represents the Tafel slope, j is the current density, i 0 represents the exchange current density, R is the ideal gas constant, n is the transfer number of electrons during the redox reaction, F is the Faraday constant, T is the temperature, and α represents the charge transfer coefficient. In addition, the Tafel slope is a useful parameter to unveil the rate-determining step and the reaction mechanism.…”

“…Transition metal-based catalysts that are expected to replace precious metals are currently hot and difficult issues in the field of OER development. [10][11][12][13][14][15][16][17] Recently, the strategies to improve the OER catalytic performance can be divided into the following categories: structure and morphology regulation, [18][19][20] vacancy and defect construction, [21][22][23][24] and surface and interface modification. [25,26] Nevertheless, the investigations on preparation strategies and catalytic mechanisms are still insufficient to support the rational design of advanced OER catalysts.…”

A NiCo2S4 octahedral configuration doped by Mn, Zn and Cu for the oxygen evolution reaction

“…Therefore, it is important to improve the OER performance of spinel sulfide by activating active sites and accelerating electron transmission. Many effective strategies have been carried out to enhance catalytic performance, such as dopant insertion, 5,6 defect 7,8 and heterojunction construction, 9–11 and surface interface regulation. 12,13…”