Fabrication of nanoporous Ni and NiO via a dealloying strategy for water oxidation catalysis

Rapid Synthesis of Large-Size Fe2O3 Nanoparticle Decorated NiO Nanosheets via Electrochemical Exfoliation for Enhanced Oxygen Evolution Electrocatalysis

“…According to the Tafel equation η = a + b log |j| , Tafel curves were ploted from polarization curves (Figure b). The Tafel slope ( b ) is an significant parameter for assessing OER dynamics . A lower Tafel slope suggests that an increased identical current density ( j ) needs a smaller overpotential (η).…”

“…at 861.3/879.3 eV on the left side of the main peaks wereattributed to Ni−O (Sat.). 34,43 The Fe 2p spectrum (Figure 4b) shows that the prepeak of Fe 2p 3/2 at 706.5 eV (Pre.) and the peaks at 712.4/ 724.1 eV of Fe 2p 3/2 /Fe 2p 1/2 can be ascribed to the typical Fe 3+ .…”

“…The Tafel slope (b) is an significant parameter for assessing OER dynamics. 43 A lower Tafel slope suggests that an increased identical current density (j) needs a smaller overpotential (η). Obviously, the Tafel slope of the Fe 2 O 3 NPs@NiO NSs catalyst is 53.4 mV dec −1 , smaller than those of NiO NSs (63.1 mV dec −1 ) and RuO 2 (80.9 mV dec −1 ), which indicates the more effective OER kinetics of Fe 2 O 3 NPs@NiO NSs.…”

3D nanoporous NiCoP as a highly efficient electrocatalyst for the hydrogen evolution reaction in alkaline electrolyte

“…48–50 The nanoporous nickel cobalt alloy produced via dealloying has a large specific surface area, and the double continuous porous structure is more conducive for the transfer of electrons and media, so it is the best choice for phosphorization substrate growth. 50–54…”

“…[48][49][50] The nanoporous nickel cobalt alloy produced via dealloying has a large specific surface area, and the double continuous porous structure is more conducive for the transfer of electrons and media, so it is the best choice for phosphorization substrate growth. [50][51][52][53][54] Experimental Materials Nickel (99.99%), cobalt (99.99%), and aluminum (99.99%) were purchased from Chenshuo Metal Material Co., Ltd (Hebei, China). Potassium hydroxide (KOH), ethanol (C 2 H 5 OH), hydrochloric acid (HCl), dimethylcarbinol (C 3 H 8 O), and sodium hypophosphite (NaH 2 PO 2 ) were purchased from Macklin Biochemical Co., Ltd (Shanghai, China).…”