Advanced trifunctional electrodes for 1.5 V-based self-powered aqueous electrochemical energy devices

Abstract

Energy devices with multifunctional applications, such as integrating two different energy devices, are emerging as promising strategy to elevate the energy technology. This is, however, an alarming challenge that appeals...

Polysulfide induced synthesis of a MoS2 self-supporting electrode with wide-layer-spacing for efficient electrocatalytic water splitting

“…S7 (ESI †). 31 This proves that the combination of few-layer and 1T-rich MoS 2 , Ni 3 S 2 to construct a hierarchical heterostructure can markedly increase the electrocatalytic active sites of the electrode, and improve the electrochemical performance of the material. Moreover, the structural stability is another momentous factor to assess the quality of the MoS 2 /Ni 3 S 2 -p catalyst.…”

“…4(d), which is proportional to the ECSA value. 31 The MoS 2 /Ni 3 S 2 -p shows the highest electrochemical C dl and A ECSA values of 21.09 mF cm −2 and 527.25 cm ECSA 2 , respectively, which is larger than those of MoS 2 /Ni 3 S 2 -s (5.96 mF cm −2 , 149 cm ECSA 2 ) and MoS 2 /Ni 3 S 2 -m (2.9 mF cm −2 , 70 cm ECSA 2 ), and the normalized ECSA of the MoS 2 /Ni 3 S 2 -p (Fig. S5f, ESI†) still shows a lower potential than that of MoS 2 /Ni 3 S 2 -s and MoS 2 /Ni 3 S 2 -m, indicating that the remarkable HER performance of the MoS 2 /Ni 3 S 2 -p partly comes from the highly active surface area.…”

Lattice oxygen activation in disordered rocksalts for boosting oxygen evolution

“…The TOFs of Li and LiFePO 4 can be calculated by ECSA = C dl /C S . 31,32 The results show that Li 1.2 Fe 0.4 Ti 0.5 O 2 possesses a larger electrochemical surface area, in which more Fe metallic atoms were activated to be the catalytic sites in the OER process. In Fig.…”

Phase Evolution on the Hydrogen Adsorption Kinetics of NiFe‐Based Heterogeneous Catalysts for Efficient Water Electrolysis

“…[1][2][3][4][5] Therefore, non-noble transition metal compounds (TMCs) have been extensively studied to replace the noble-metal-based catalysts based on their earth-abundance and low cost. [6][7][8] Among these TMC electrocatalysts, particularly nickel-iron layered double hydroxide (NiFe-LDH), have witnessed extensive investigations in the last decade due to their attractive physicochemical properties, unique layered structure, and noteworthy redox characteristics. [9,10] It has now become the basic reference for OER performance because of its superiority to the state-of-the-art Ru/Irbased catalysts.…”