Nickel oxide doped ceria nanoparticles (NiO@CeO2) for boosting oxygen evolution reaction and enhancing stability

Patel, Kinjal B.; Mariyaselvakumar, Mariyamuthu; Vyas, Gaurav; Chaudhari, Jayesh C.; Patidar, Rajesh; Srinivasan, Kannan; Srivastava, Divesh N.; Bhadu, Gopala Ram

doi:10.1016/j.apsusc.2023.159212

Cited by 6 publications

(1 citation statement)

References 67 publications

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“…The ECSA is directly proportional to the double-layer capacitance ( C dl ), which can be determined by analyzing CV curves obtained at different scan rates within the non-Faraday region (Figure S10). , As depicted in Figure c, LCAs-Ni-NDC-2 NAs exhibit a C dl value of 15.8 mF cm –2 , slightly larger than that of LCAs-Ni-NDC-1 NAs (12.9 mF cm –2 ) but significantly greater than those of Ni-NDC NAs (6.0 mF cm –2 ) and Ni(OH) 2 NAs (6.5 mF cm –2 ). Consequently, through the implementation of a missing linker scission strategy, LCAs-Ni-NDC NAs can generate a larger ECSA and possess an increased number of active sites.…”

Section: Resultsmentioning

confidence: 99%

Engineering Internal and External Low-Coordination Atoms in Nickel–Organic Framework Nanoarrays to Promote the Electrochemical Oxygen Evolution Reaction

Wang,

Lin,

Zhang

et al. 2024

Inorg. Chem.

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Monometallic nickel−organic frameworks based on a carboxylated ligand [2,] have abundant and uniformly distributed single-atom Ni sites, enabling superior oxygen evolution reaction (OER) activity. In theory, most of the Ni atoms inside Ni-NDC microcrystals are coordinatively saturated except for the surface. Therefore, there are no accessible low-coordination atoms (LCAs) as electrocatalytic sites for the OER. One effective way is to expose more LCAs by preparing self-supporting Ni-NDC nanoarrays (Ni-NDC NAs) with hierarchical secondary structural units. Another effective method is to create more internal LCAs by removing partial ligands or coordination atoms attached to the Ni atoms. Herein, by combining the two strategies, we engineered LCAs in the interior and exterior of Ni-NDC to synergistically accelerate the OER. In brief, ultrathick "bricklike" Ni-NDC NAs were first prepared with dissolution and coordination effects of NDC on self-sacrificial templates of "agaric-like" nickel hydroxide nanoarrays [Ni(OH) 2 NAs]. Subsequently, dual-coordinated NDC was partially replaced by monocoordinated 2-naphthoic acid (NA). The Ni-NDC NAs were further tailed into ultrathin "liner leaf-like" nanoneedle arrays (LCAs-Ni-NDC NAs). As a consequence, the LCAs-Ni-NDC NAs have more internal and external LCAs, which can deliver an OER performance that is superior to that of Ni-NDC NAs.

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Section: Resultsmentioning

confidence: 99%