Surface-Fe enriched trimetallic (oxy)hydroxide engineered by S-incorporation and ligand anchoring toward efficient water oxidation

Hollow Carbon Cages Derived from Polyoxometalate‐Encapsuled Metal‐Organic Frameworks for Energy‐Saving Hydrogen Production

“…The doped N elements not only facilitate the electron transfer, but also act as active sites for the electrocatalytic process [69] . The HR‐XPS of C 1s can be fitted into six peaks: at 289.3, 287.5, 286.6, 285.5, 284.8 and 283.5 eV, which can be assigned to −COO, O=C, O−C, N−C, C−C, and W−C, respectively [66,70] . The HR‐XPS of P 2 p displayed four peaks: at 129.7, 130.6, 132.4 and 135.3 eV, ascribed to P 2p 3/2 , P 2p 1/2 , P−C and P−O, respectively, indicating that P was successfully doped into the carbon matrix, which could lead to good electrochemical kinetics [71,72] .…”

“…[69] The HR-XPS of C 1s can be fitted into six peaks: at 289.3, 287.5, 286.6, 285.5, 284.8 and 283.5 eV, which can be assigned to À COO, O=C, OÀ C, NÀ C, CÀ C, and WÀ C, respectively. [66,70] The HR-XPS of P 2p displayed four peaks: at 129.7, 130.6, 132.4 and 135.3 eV, ascribed to P 2p 3/2 , P 2p 1/2 , PÀ C and PÀ O, respectively, indicating that P was successfully doped into the carbon matrix, which could lead to good electrochemical kinetics. [71,72] The HR-XPS spectrum of Zn 2p (Figure S7) contained two major peaks at 1045.1 eV (Zn 2p 1/ 2 ) and 1021.8 eV (Zn 2p 3/2 ), which could be assigned to metallic Zn.…”

In situ generated Cu–Co–Zn trimetallic sulfide nanoflowers on copper foam: a highly efficient OER electrocatalyst

“…47 This further indicates that there may be electron transfer between Cu, Zn and Co, with Cu and Zn providing electrons to Co and increasing the electron density at the active site, which would be beneficial for oxygen involved electrocatalysis. 48 In summary, the synergistic effect of trimetallic ions could tailor the electronic structure and will be beneficial for redox reactions.…”

Research Progress of High-Entropy Oxides as Oxygen Evolution Reaction Catalysts

“…Hydrogen is predicted to be one of the future’s clean energy sources. Electrocatalysis is now one of the most effective techniques to manufacture hydrogen, and it can also produce water. − The three primary categories for the electrocatalytic breakdown of water are the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER). − Electrochemical water splitting is a promising avenue for sustainable hydrogen production, pivotal for the clean energy transition. Recent research efforts have been directed toward developing efficient, durable, and cost-effective electrocatalysts to enhance the oxygen evolution reaction and hydrogen evolution reaction, critical processes in water electrolysis. − There has been ongoing evolution of electrocatalyst materials and technologies.…”