Stepwise chemical oxidation to access ultrathin metal (oxy)-hydroxide nanosheets for the oxygen evolution reaction

Abstract

Incorporation of ultrathin nanosheets with dopants/defects shows great potential to enable metal (oxy)-hydroxide electrocatalysts with enhanced oxygen evolution reaction (OER) performance via regulation on atomic structure and bonding arrangements. However,...

Unveiling the Structural Self-Reconstruction and Identifying the Reactive Center of a V, Fe Co-Doped Cobalt Precatalyst toward Enhanced Overall Water Splitting by Operando Raman Spectroscopy

“…However, we discover that there is no such conversion of the β-CoOOH on the A-Co 60 Fe 1.1 and A-Co 60 Fe 1.1 V (Figures b and S24b). From the above results, we may speculate that Fe doping can inhibit the conversion of β-CoOOH to γ-CoOOH . Besides, as shown in Figure S24, compared with the A-Co 60 Fe 1.1 V catalyst, the Raman bands of CoOOH show up at higher potentials on the A-Co 60 V and A-Co 60 Fe 1.1 , indicating that Fe, V co-doping could induce earlier formation of the CoOOH.…”

Heterostructured ZnCo2O4–CoOOH nanosheets on Ni foam for a high performance bifunctional alkaline water splitting catalyst

“…In addition, the spectrum is accompanied by relevant satellite peaks. 36,37 These peaks consist of Co 2+ and Co 3+ ions, where the Co 3+ ion is deemed to enhance OER activity. 38 Besides, the O 1s spectrum is revealed in Fig.…”

Efficient and durable S-doped Ni/FeOOH electrocatalysts for oxygen evolution reactions

“…[5][6][7][8][9] In recent years, transition metal-based electrocatalysts have been considerably developed, such as oxides, hydroxides, chalcogenides, metal-organic frameworks (MOFs) and nitrides. [10][11][12][13][14][15][16][17][18] Among them, NiFe-based compounds could win out as highly efficient OER catalysts, because the synergistic effect can provide appropriate electronic structures to bind the OER intermediates. [19][20][21][22][23] For example, NiFe layered double hydroxides (LDHs), [24][25][26][27][28][29] NiFe oxides, 30,31 NiFe sulfides, [32][33][34][35] and NiFe MOFs all possess excellent OER performance.…”